﻿<?xml version="1.0" encoding="utf-8" standalone="yes"?>
<!--Created by Sturnis 365, Powered by IRIS Carbon, Unique Code 69c3070dbb6f5d1ab47833df, Generated At Tue, 24 Mar 2026 21:52:08 GMT-->
<link:linkbase xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xl="http://www.xbrl.org/2003/XLink" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xbrli="http://www.xbrl.org/2003/instance" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
  <link:roleRef roleURI="http://www.kbc.com/xbrl/role/GeconsolideerdebalansAB" xlink:type="simple" xlink:href="213800X3Q9LSAKRUWY91-2025-12-31.xsd#GeconsolideerdebalansAB" />
  <link:roleRef roleURI="http://www.kbc.com/xbrl/role/Geconsolideerdoverzichtvanwijzigingeninheteigenvermogen" xlink:type="simple" xlink:href="213800X3Q9LSAKRUWY91-2025-12-31.xsd#Geconsolideerdoverzichtvanwijzigingeninheteigenvermogen" />
  <link:roleRef roleURI="http://www.kbc.com/xbrl/role/Geconsolideerdewinstenverliesrekening" xlink:type="simple" xlink:href="213800X3Q9LSAKRUWY91-2025-12-31.xsd#Geconsolideerdewinstenverliesrekening" />
  <link:roleRef roleURI="http://www.kbc.com/xbrl/role/Geconsolideerdegerealiseerdeennietgerealiseerderesultaten" xlink:type="simple" xlink:href="213800X3Q9LSAKRUWY91-2025-12-31.xsd#Geconsolideerdegerealiseerdeennietgerealiseerderesultaten" />
  <link:roleRef roleURI="http://www.kbc.com/xbrl/role/GeconsolideerdkasstroomoverzichtAB" xlink:type="simple" xlink:href="213800X3Q9LSAKRUWY91-2025-12-31.xsd#GeconsolideerdkasstroomoverzichtAB" />
  <link:roleRef roleURI="http://www.kbc.com/xbrl/role/GeconsolideerdegerealiseerdeennietgerealiseerderesultatenParentheticals" xlink:type="simple" xlink:href="213800X3Q9LSAKRUWY91-2025-12-31.xsd#GeconsolideerdegerealiseerdeennietgerealiseerderesultatenParentheticals" />
  <link:roleRef roleURI="http://www.kbc.com/xbrl/role/GeconsolideerdoverzichtvanwijzigingeninheteigenvermogenParentheticals" xlink:type="simple" xlink:href="213800X3Q9LSAKRUWY91-2025-12-31.xsd#GeconsolideerdoverzichtvanwijzigingeninheteigenvermogenParentheticals" />
  <link:roleRef roleURI="http://www.kbc.com/xbrl/role/GeconsolideerdoverzichtvanwijzigingeninheteigenvermogenParentheticals2" xlink:type="simple" xlink:href="213800X3Q9LSAKRUWY91-2025-12-31.xsd#GeconsolideerdoverzichtvanwijzigingeninheteigenvermogenParentheticals2" />
  <link:roleRef roleURI="http://www.kbc.com/xbrl/role/GeconsolideerdkasstroomoverzichtParentheticals" xlink:type="simple" xlink:href="213800X3Q9LSAKRUWY91-2025-12-31.xsd#GeconsolideerdkasstroomoverzichtParentheticals" />
  <link:roleRef roleURI="http://www.kbc.com/xbrl/role/Toelichtingopdegeconsolideerdejaarrekening" xlink:type="simple" xlink:href="213800X3Q9LSAKRUWY91-2025-12-31.xsd#Toelichtingopdegeconsolideerdejaarrekening" />
  <link:arcroleRef arcroleURI="https://xbrl.org/2023/arcrole/summation-item" xlink:type="simple" xlink:href="https://www.xbrl.org/2023/calculation-1.1.xsd#summation-item" />
  <link:calculationLink xlink:type="extended" xlink:role="http://www.kbc.com/xbrl/role/GeconsolideerdebalansAB">
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_Assets" xlink:label="ifrs-full_Assets" xlink:title="ifrs-full_Assets" />
    <link:loc xlink:type="locator" xlink:href="213800X3Q9LSAKRUWY91-2025-12-31.xsd#kbc_CashCashBalancesWithCentralBanksAndOtherDemandDepositsWithCreditInstitutions" xlink:label="kbc_CashCashBalancesWithCentralBanksAndOtherDemandDepositsWithCreditInstitutions" xlink:title="kbc_CashCashBalancesWithCentralBanksAndOtherDemandDepositsWithCreditInstitutions" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_Assets" xlink:to="kbc_CashCashBalancesWithCentralBanksAndOtherDemandDepositsWithCreditInstitutions" xlink:title="Calculation : ifrs-full_Assets to kbc_CashCashBalancesWithCentralBanksAndOtherDemandDepositsWithCreditInstitutions" order="0" weight="1" />
    <link:loc xlink:type="locator" xlink:href="213800X3Q9LSAKRUWY91-2025-12-31.xsd#kbc_FinancialAssetsExcludingCashCashBalancesWithCentralBanksAndDemandDeposits" xlink:label="kbc_FinancialAssetsExcludingCashCashBalancesWithCentralBanksAndDemandDeposits" xlink:title="kbc_FinancialAssetsExcludingCashCashBalancesWithCentralBanksAndDemandDeposits" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_Assets" xlink:to="kbc_FinancialAssetsExcludingCashCashBalancesWithCentralBanksAndDemandDeposits" xlink:title="Calculation : ifrs-full_Assets to kbc_FinancialAssetsExcludingCashCashBalancesWithCentralBanksAndDemandDeposits" order="1" weight="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_FinancialAssetsAtAmortisedCost" xlink:label="ifrs-full_FinancialAssetsAtAmortisedCost" xlink:title="ifrs-full_FinancialAssetsAtAmortisedCost" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="kbc_FinancialAssetsExcludingCashCashBalancesWithCentralBanksAndDemandDeposits" xlink:to="ifrs-full_FinancialAssetsAtAmortisedCost" xlink:title="Calculation : kbc_FinancialAssetsExcludingCashCashBalancesWithCentralBanksAndDemandDeposits to ifrs-full_FinancialAssetsAtAmortisedCost" order="0" weight="1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_FinancialAssetsAtFairValueThroughOtherComprehensiveIncome" xlink:label="ifrs-full_FinancialAssetsAtFairValueThroughOtherComprehensiveIncome" xlink:title="ifrs-full_FinancialAssetsAtFairValueThroughOtherComprehensiveIncome" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="kbc_FinancialAssetsExcludingCashCashBalancesWithCentralBanksAndDemandDeposits" xlink:to="ifrs-full_FinancialAssetsAtFairValueThroughOtherComprehensiveIncome" xlink:title="Calculation : kbc_FinancialAssetsExcludingCashCashBalancesWithCentralBanksAndDemandDeposits to ifrs-full_FinancialAssetsAtFairValueThroughOtherComprehensiveIncome" order="1" weight="1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_FinancialAssetsAtFairValueThroughProfitOrLoss" xlink:label="ifrs-full_FinancialAssetsAtFairValueThroughProfitOrLoss" xlink:title="ifrs-full_FinancialAssetsAtFairValueThroughProfitOrLoss" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="kbc_FinancialAssetsExcludingCashCashBalancesWithCentralBanksAndDemandDeposits" xlink:to="ifrs-full_FinancialAssetsAtFairValueThroughProfitOrLoss" xlink:title="Calculation : kbc_FinancialAssetsExcludingCashCashBalancesWithCentralBanksAndDemandDeposits to ifrs-full_FinancialAssetsAtFairValueThroughProfitOrLoss" order="2" weight="1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_DerivativeFinancialAssetsHeldForHedging" xlink:label="ifrs-full_DerivativeFinancialAssetsHeldForHedging" xlink:title="ifrs-full_DerivativeFinancialAssetsHeldForHedging" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="kbc_FinancialAssetsExcludingCashCashBalancesWithCentralBanksAndDemandDeposits" xlink:to="ifrs-full_DerivativeFinancialAssetsHeldForHedging" xlink:title="Calculation : kbc_FinancialAssetsExcludingCashCashBalancesWithCentralBanksAndDemandDeposits to ifrs-full_DerivativeFinancialAssetsHeldForHedging" order="3" weight="1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_ReinsuranceContractsHeldThatAreAssets" xlink:label="ifrs-full_ReinsuranceContractsHeldThatAreAssets" xlink:title="ifrs-full_ReinsuranceContractsHeldThatAreAssets" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_Assets" xlink:to="ifrs-full_ReinsuranceContractsHeldThatAreAssets" xlink:title="Calculation : ifrs-full_Assets to ifrs-full_ReinsuranceContractsHeldThatAreAssets" order="2" weight="1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="213800X3Q9LSAKRUWY91-2025-12-31.xsd#kbc_TaxAssets" xlink:label="kbc_TaxAssets" xlink:title="kbc_TaxAssets" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_Assets" xlink:to="kbc_TaxAssets" xlink:title="Calculation : ifrs-full_Assets to kbc_TaxAssets" order="3" weight="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_CurrentTaxAssets" xlink:label="ifrs-full_CurrentTaxAssets" xlink:title="ifrs-full_CurrentTaxAssets" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="kbc_TaxAssets" xlink:to="ifrs-full_CurrentTaxAssets" xlink:title="Calculation : kbc_TaxAssets to ifrs-full_CurrentTaxAssets" order="0" weight="1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_DeferredTaxAssets" xlink:label="ifrs-full_DeferredTaxAssets" xlink:title="ifrs-full_DeferredTaxAssets" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="kbc_TaxAssets" xlink:to="ifrs-full_DeferredTaxAssets" xlink:title="Calculation : kbc_TaxAssets to ifrs-full_DeferredTaxAssets" order="1" weight="1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_NoncurrentAssetsOrDisposalGroupsClassifiedAsHeldForSaleOrAsHeldForDistributionToOwners" xlink:label="ifrs-full_NoncurrentAssetsOrDisposalGroupsClassifiedAsHeldForSaleOrAsHeldForDistributionToOwners" xlink:title="ifrs-full_NoncurrentAssetsOrDisposalGroupsClassifiedAsHeldForSaleOrAsHeldForDistributionToOwners" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_Assets" xlink:to="ifrs-full_NoncurrentAssetsOrDisposalGroupsClassifiedAsHeldForSaleOrAsHeldForDistributionToOwners" xlink:title="Calculation : ifrs-full_Assets to ifrs-full_NoncurrentAssetsOrDisposalGroupsClassifiedAsHeldForSaleOrAsHeldForDistributionToOwners" order="4" weight="1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_InvestmentsInSubsidiariesJointVenturesAndAssociates" xlink:label="ifrs-full_InvestmentsInSubsidiariesJointVenturesAndAssociates" xlink:title="ifrs-full_InvestmentsInSubsidiariesJointVenturesAndAssociates" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_Assets" xlink:to="ifrs-full_InvestmentsInSubsidiariesJointVenturesAndAssociates" xlink:title="Calculation : ifrs-full_Assets to ifrs-full_InvestmentsInSubsidiariesJointVenturesAndAssociates" order="5" weight="1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="213800X3Q9LSAKRUWY91-2025-12-31.xsd#kbc_PropertyAndEquipmentAndInvestmentProperty" xlink:label="kbc_PropertyAndEquipmentAndInvestmentProperty" xlink:title="kbc_PropertyAndEquipmentAndInvestmentProperty" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_Assets" xlink:to="kbc_PropertyAndEquipmentAndInvestmentProperty" xlink:title="Calculation : ifrs-full_Assets to kbc_PropertyAndEquipmentAndInvestmentProperty" order="6" weight="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_IntangibleAssetsAndGoodwill" xlink:label="ifrs-full_IntangibleAssetsAndGoodwill" xlink:title="ifrs-full_IntangibleAssetsAndGoodwill" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_Assets" xlink:to="ifrs-full_IntangibleAssetsAndGoodwill" xlink:title="Calculation : ifrs-full_Assets to ifrs-full_IntangibleAssetsAndGoodwill" order="7" weight="1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_OtherAssets" xlink:label="ifrs-full_OtherAssets" xlink:title="ifrs-full_OtherAssets" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_Assets" xlink:to="ifrs-full_OtherAssets" xlink:title="Calculation : ifrs-full_Assets to ifrs-full_OtherAssets" order="8" weight="1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_AccumulatedFairValueHedgeAdjustmentOnHedgedItemIncludedInCarryingAmountAssets" xlink:label="ifrs-full_AccumulatedFairValueHedgeAdjustmentOnHedgedItemIncludedInCarryingAmountAssets" xlink:title="ifrs-full_AccumulatedFairValueHedgeAdjustmentOnHedgedItemIncludedInCarryingAmountAssets" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_Assets" xlink:to="ifrs-full_AccumulatedFairValueHedgeAdjustmentOnHedgedItemIncludedInCarryingAmountAssets" xlink:title="Calculation : ifrs-full_Assets to ifrs-full_AccumulatedFairValueHedgeAdjustmentOnHedgedItemIncludedInCarryingAmountAssets" order="9" weight="1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_EquityAndLiabilities" xlink:label="ifrs-full_EquityAndLiabilities" xlink:title="ifrs-full_EquityAndLiabilities" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_Liabilities" xlink:label="ifrs-full_Liabilities" xlink:title="ifrs-full_Liabilities" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_EquityAndLiabilities" xlink:to="ifrs-full_Liabilities" xlink:title="Calculation : ifrs-full_EquityAndLiabilities to ifrs-full_Liabilities" order="0" weight="1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_FinancialLiabilities" xlink:label="ifrs-full_FinancialLiabilities" xlink:title="ifrs-full_FinancialLiabilities" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_Liabilities" xlink:to="ifrs-full_FinancialLiabilities" xlink:title="Calculation : ifrs-full_Liabilities to ifrs-full_FinancialLiabilities" order="0" weight="1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_FinancialLiabilitiesAtAmortisedCost" xlink:label="ifrs-full_FinancialLiabilitiesAtAmortisedCost" xlink:title="ifrs-full_FinancialLiabilitiesAtAmortisedCost" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_FinancialLiabilities" xlink:to="ifrs-full_FinancialLiabilitiesAtAmortisedCost" xlink:title="Calculation : ifrs-full_FinancialLiabilities to ifrs-full_FinancialLiabilitiesAtAmortisedCost" order="0" weight="1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_FinancialLiabilitiesAtFairValueThroughProfitOrLoss" xlink:label="ifrs-full_FinancialLiabilitiesAtFairValueThroughProfitOrLoss" xlink:title="ifrs-full_FinancialLiabilitiesAtFairValueThroughProfitOrLoss" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_FinancialLiabilities" xlink:to="ifrs-full_FinancialLiabilitiesAtFairValueThroughProfitOrLoss" xlink:title="Calculation : ifrs-full_FinancialLiabilities to ifrs-full_FinancialLiabilitiesAtFairValueThroughProfitOrLoss" order="1" weight="1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_DerivativeFinancialLiabilitiesHeldForHedging" xlink:label="ifrs-full_DerivativeFinancialLiabilitiesHeldForHedging" xlink:title="ifrs-full_DerivativeFinancialLiabilitiesHeldForHedging" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_FinancialLiabilities" xlink:to="ifrs-full_DerivativeFinancialLiabilitiesHeldForHedging" xlink:title="Calculation : ifrs-full_FinancialLiabilities to ifrs-full_DerivativeFinancialLiabilitiesHeldForHedging" order="2" weight="1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_InsuranceContractsThatAreLiabilities" xlink:label="ifrs-full_InsuranceContractsThatAreLiabilities" xlink:title="ifrs-full_InsuranceContractsThatAreLiabilities" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_Liabilities" xlink:to="ifrs-full_InsuranceContractsThatAreLiabilities" xlink:title="Calculation : ifrs-full_Liabilities to ifrs-full_InsuranceContractsThatAreLiabilities" order="1" weight="1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="213800X3Q9LSAKRUWY91-2025-12-31.xsd#kbc_NonLifeInsuranceContractsThatAreLiabilities" xlink:label="kbc_NonLifeInsuranceContractsThatAreLiabilities" xlink:title="kbc_NonLifeInsuranceContractsThatAreLiabilities" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_InsuranceContractsThatAreLiabilities" xlink:to="kbc_NonLifeInsuranceContractsThatAreLiabilities" xlink:title="Calculation : ifrs-full_InsuranceContractsThatAreLiabilities to kbc_NonLifeInsuranceContractsThatAreLiabilities" order="0" weight="1" />
    <link:loc xlink:type="locator" xlink:href="213800X3Q9LSAKRUWY91-2025-12-31.xsd#kbc_LifeInsuranceContractsThatAreLiabilities" xlink:label="kbc_LifeInsuranceContractsThatAreLiabilities" xlink:title="kbc_LifeInsuranceContractsThatAreLiabilities" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_InsuranceContractsThatAreLiabilities" xlink:to="kbc_LifeInsuranceContractsThatAreLiabilities" xlink:title="Calculation : ifrs-full_InsuranceContractsThatAreLiabilities to kbc_LifeInsuranceContractsThatAreLiabilities" order="1" weight="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_AccumulatedFairValueHedgeAdjustmentOnHedgedItemIncludedInCarryingAmountLiabilities" xlink:label="ifrs-full_AccumulatedFairValueHedgeAdjustmentOnHedgedItemIncludedInCarryingAmountLiabilities" xlink:title="ifrs-full_AccumulatedFairValueHedgeAdjustmentOnHedgedItemIncludedInCarryingAmountLiabilities" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_Liabilities" xlink:to="ifrs-full_AccumulatedFairValueHedgeAdjustmentOnHedgedItemIncludedInCarryingAmountLiabilities" xlink:title="Calculation : ifrs-full_Liabilities to ifrs-full_AccumulatedFairValueHedgeAdjustmentOnHedgedItemIncludedInCarryingAmountLiabilities" order="2" weight="1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="213800X3Q9LSAKRUWY91-2025-12-31.xsd#kbc_TaxLiabilities" xlink:label="kbc_TaxLiabilities" xlink:title="kbc_TaxLiabilities" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_Liabilities" xlink:to="kbc_TaxLiabilities" xlink:title="Calculation : ifrs-full_Liabilities to kbc_TaxLiabilities" order="3" weight="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_CurrentTaxLiabilities" xlink:label="ifrs-full_CurrentTaxLiabilities" xlink:title="ifrs-full_CurrentTaxLiabilities" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="kbc_TaxLiabilities" xlink:to="ifrs-full_CurrentTaxLiabilities" xlink:title="Calculation : kbc_TaxLiabilities to ifrs-full_CurrentTaxLiabilities" order="0" weight="1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_DeferredTaxLiabilities" xlink:label="ifrs-full_DeferredTaxLiabilities" xlink:title="ifrs-full_DeferredTaxLiabilities" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="kbc_TaxLiabilities" xlink:to="ifrs-full_DeferredTaxLiabilities" xlink:title="Calculation : kbc_TaxLiabilities to ifrs-full_DeferredTaxLiabilities" order="1" weight="1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_LiabilitiesIncludedInDisposalGroupsClassifiedAsHeldForSale" xlink:label="ifrs-full_LiabilitiesIncludedInDisposalGroupsClassifiedAsHeldForSale" xlink:title="ifrs-full_LiabilitiesIncludedInDisposalGroupsClassifiedAsHeldForSale" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_Liabilities" xlink:to="ifrs-full_LiabilitiesIncludedInDisposalGroupsClassifiedAsHeldForSale" xlink:title="Calculation : ifrs-full_Liabilities to ifrs-full_LiabilitiesIncludedInDisposalGroupsClassifiedAsHeldForSale" order="4" weight="1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_Provisions" xlink:label="ifrs-full_Provisions" xlink:title="ifrs-full_Provisions" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_Liabilities" xlink:to="ifrs-full_Provisions" xlink:title="Calculation : ifrs-full_Liabilities to ifrs-full_Provisions" order="5" weight="1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_OtherLiabilities" xlink:label="ifrs-full_OtherLiabilities" xlink:title="ifrs-full_OtherLiabilities" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_Liabilities" xlink:to="ifrs-full_OtherLiabilities" xlink:title="Calculation : ifrs-full_Liabilities to ifrs-full_OtherLiabilities" order="6" weight="1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_Equity" xlink:label="ifrs-full_Equity" xlink:title="ifrs-full_Equity" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_EquityAndLiabilities" xlink:to="ifrs-full_Equity" xlink:title="Calculation : ifrs-full_EquityAndLiabilities to ifrs-full_Equity" order="1" weight="1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_EquityAttributableToOwnersOfParent" xlink:label="ifrs-full_EquityAttributableToOwnersOfParent" xlink:title="ifrs-full_EquityAttributableToOwnersOfParent" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_Equity" xlink:to="ifrs-full_EquityAttributableToOwnersOfParent" xlink:title="Calculation : ifrs-full_Equity to ifrs-full_EquityAttributableToOwnersOfParent" order="0" weight="1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="213800X3Q9LSAKRUWY91-2025-12-31.xsd#kbc_AdditionalTier1InstrumentsIncludedInEquity" xlink:label="kbc_AdditionalTier1InstrumentsIncludedInEquity" xlink:title="kbc_AdditionalTier1InstrumentsIncludedInEquity" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_Equity" xlink:to="kbc_AdditionalTier1InstrumentsIncludedInEquity" xlink:title="Calculation : ifrs-full_Equity to kbc_AdditionalTier1InstrumentsIncludedInEquity" order="1" weight="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_NoncontrollingInterests" xlink:label="ifrs-full_NoncontrollingInterests" xlink:title="ifrs-full_NoncontrollingInterests" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_Equity" xlink:to="ifrs-full_NoncontrollingInterests" xlink:title="Calculation : ifrs-full_Equity to ifrs-full_NoncontrollingInterests" order="2" weight="1" use="optional" />
  </link:calculationLink>
  <link:calculationLink xlink:type="extended" xlink:role="http://www.kbc.com/xbrl/role/Geconsolideerdoverzichtvanwijzigingeninheteigenvermogen">
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_ChangesInEquity" xlink:label="ifrs-full_ChangesInEquity" xlink:title="ifrs-full_ChangesInEquity" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_ComprehensiveIncome" xlink:label="ifrs-full_ComprehensiveIncome" xlink:title="ifrs-full_ComprehensiveIncome" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_ChangesInEquity" xlink:to="ifrs-full_ComprehensiveIncome" xlink:title="Calculation : ifrs-full_ChangesInEquity to ifrs-full_ComprehensiveIncome" order="0" weight="1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_DividendsPaid" xlink:label="ifrs-full_DividendsPaid" xlink:title="ifrs-full_DividendsPaid" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_ChangesInEquity" xlink:to="ifrs-full_DividendsPaid" xlink:title="Calculation : ifrs-full_ChangesInEquity to ifrs-full_DividendsPaid" order="1" weight="-1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="213800X3Q9LSAKRUWY91-2025-12-31.xsd#kbc_DecreaseThroughCouponOnAdditionalTier1Instruments" xlink:label="kbc_DecreaseThroughCouponOnAdditionalTier1Instruments" xlink:title="kbc_DecreaseThroughCouponOnAdditionalTier1Instruments" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_ChangesInEquity" xlink:to="kbc_DecreaseThroughCouponOnAdditionalTier1Instruments" xlink:title="Calculation : ifrs-full_ChangesInEquity to kbc_DecreaseThroughCouponOnAdditionalTier1Instruments" order="2" weight="-1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_IssueOfEquity" xlink:label="ifrs-full_IssueOfEquity" xlink:title="ifrs-full_IssueOfEquity" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_ChangesInEquity" xlink:to="ifrs-full_IssueOfEquity" xlink:title="Calculation : ifrs-full_ChangesInEquity to ifrs-full_IssueOfEquity" order="3" weight="1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_IncreaseDecreaseThroughTransferBetweenRevaluationReserveAndRetainedEarnings" xlink:label="ifrs-full_IncreaseDecreaseThroughTransferBetweenRevaluationReserveAndRetainedEarnings" xlink:title="ifrs-full_IncreaseDecreaseThroughTransferBetweenRevaluationReserveAndRetainedEarnings" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_ChangesInEquity" xlink:to="ifrs-full_IncreaseDecreaseThroughTransferBetweenRevaluationReserveAndRetainedEarnings" xlink:title="Calculation : ifrs-full_ChangesInEquity to ifrs-full_IncreaseDecreaseThroughTransferBetweenRevaluationReserveAndRetainedEarnings" order="4" weight="1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="213800X3Q9LSAKRUWY91-2025-12-31.xsd#kbc_PurchaseSaleOfTreasuryShares" xlink:label="kbc_PurchaseSaleOfTreasuryShares" xlink:title="kbc_PurchaseSaleOfTreasuryShares" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_ChangesInEquity" xlink:to="kbc_PurchaseSaleOfTreasuryShares" xlink:title="Calculation : ifrs-full_ChangesInEquity to kbc_PurchaseSaleOfTreasuryShares" order="5" weight="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_IncreaseDecreaseThroughChangesInOwnershipInterestsInSubsidiariesThatDoNotResultInLossOfControl" xlink:label="ifrs-full_IncreaseDecreaseThroughChangesInOwnershipInterestsInSubsidiariesThatDoNotResultInLossOfControl" xlink:title="ifrs-full_IncreaseDecreaseThroughChangesInOwnershipInterestsInSubsidiariesThatDoNotResultInLossOfControl" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_ChangesInEquity" xlink:to="ifrs-full_IncreaseDecreaseThroughChangesInOwnershipInterestsInSubsidiariesThatDoNotResultInLossOfControl" xlink:title="Calculation : ifrs-full_ChangesInEquity to ifrs-full_IncreaseDecreaseThroughChangesInOwnershipInterestsInSubsidiariesThatDoNotResultInLossOfControl" order="6" weight="1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="213800X3Q9LSAKRUWY91-2025-12-31.xsd#kbc_IncreaseDecreaseThroughIssueOrRepurchaseOfAdditionalTier1Instruments" xlink:label="kbc_IncreaseDecreaseThroughIssueOrRepurchaseOfAdditionalTier1Instruments" xlink:title="kbc_IncreaseDecreaseThroughIssueOrRepurchaseOfAdditionalTier1Instruments" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_ChangesInEquity" xlink:to="kbc_IncreaseDecreaseThroughIssueOrRepurchaseOfAdditionalTier1Instruments" xlink:title="Calculation : ifrs-full_ChangesInEquity to kbc_IncreaseDecreaseThroughIssueOrRepurchaseOfAdditionalTier1Instruments" order="7" weight="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_IncreaseDecreaseThroughChangeInEquityOfSubsidiaries" xlink:label="ifrs-full_IncreaseDecreaseThroughChangeInEquityOfSubsidiaries" xlink:title="ifrs-full_IncreaseDecreaseThroughChangeInEquityOfSubsidiaries" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_ChangesInEquity" xlink:to="ifrs-full_IncreaseDecreaseThroughChangeInEquityOfSubsidiaries" xlink:title="Calculation : ifrs-full_ChangesInEquity to ifrs-full_IncreaseDecreaseThroughChangeInEquityOfSubsidiaries" order="8" weight="1" use="optional" />
  </link:calculationLink>
  <link:calculationLink xlink:type="extended" xlink:role="http://www.kbc.com/xbrl/role/Geconsolideerdewinstenverliesrekening">
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_ProfitLoss" xlink:label="ifrs-full_ProfitLoss" xlink:title="ifrs-full_ProfitLoss" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_ProfitLossBeforeTax" xlink:label="ifrs-full_ProfitLossBeforeTax" xlink:title="ifrs-full_ProfitLossBeforeTax" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_ProfitLoss" xlink:to="ifrs-full_ProfitLossBeforeTax" xlink:title="Calculation : ifrs-full_ProfitLoss to ifrs-full_ProfitLossBeforeTax" order="0" weight="1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_Revenue" xlink:label="ifrs-full_Revenue" xlink:title="ifrs-full_Revenue" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_ProfitLossBeforeTax" xlink:to="ifrs-full_Revenue" xlink:title="Calculation : ifrs-full_ProfitLossBeforeTax to ifrs-full_Revenue" order="0" weight="1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_InterestRevenueExpense" xlink:label="ifrs-full_InterestRevenueExpense" xlink:title="ifrs-full_InterestRevenueExpense" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_Revenue" xlink:to="ifrs-full_InterestRevenueExpense" xlink:title="Calculation : ifrs-full_Revenue to ifrs-full_InterestRevenueExpense" order="0" weight="1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_RevenueFromInterest" xlink:label="ifrs-full_RevenueFromInterest" xlink:title="ifrs-full_RevenueFromInterest" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_InterestRevenueExpense" xlink:to="ifrs-full_RevenueFromInterest" xlink:title="Calculation : ifrs-full_InterestRevenueExpense to ifrs-full_RevenueFromInterest" order="0" weight="1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_InterestExpense" xlink:label="ifrs-full_InterestExpense" xlink:title="ifrs-full_InterestExpense" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_InterestRevenueExpense" xlink:to="ifrs-full_InterestExpense" xlink:title="Calculation : ifrs-full_InterestRevenueExpense to ifrs-full_InterestExpense" order="1" weight="-1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_InsuranceRevenue" xlink:label="ifrs-full_InsuranceRevenue" xlink:title="ifrs-full_InsuranceRevenue" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_Revenue" xlink:to="ifrs-full_InsuranceRevenue" xlink:title="Calculation : ifrs-full_Revenue to ifrs-full_InsuranceRevenue" order="1" weight="1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="213800X3Q9LSAKRUWY91-2025-12-31.xsd#kbc_NonLifeInsuranceRevenueBeforeReinsurance" xlink:label="kbc_NonLifeInsuranceRevenueBeforeReinsurance" xlink:title="kbc_NonLifeInsuranceRevenueBeforeReinsurance" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_InsuranceRevenue" xlink:to="kbc_NonLifeInsuranceRevenueBeforeReinsurance" xlink:title="Calculation : ifrs-full_InsuranceRevenue to kbc_NonLifeInsuranceRevenueBeforeReinsurance" order="0" weight="1" />
    <link:loc xlink:type="locator" xlink:href="213800X3Q9LSAKRUWY91-2025-12-31.xsd#kbc_LifeInsuranceRevenueBeforeReinsurance" xlink:label="kbc_LifeInsuranceRevenueBeforeReinsurance" xlink:title="kbc_LifeInsuranceRevenueBeforeReinsurance" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_InsuranceRevenue" xlink:to="kbc_LifeInsuranceRevenueBeforeReinsurance" xlink:title="Calculation : ifrs-full_InsuranceRevenue to kbc_LifeInsuranceRevenueBeforeReinsurance" order="1" weight="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_RevenueFromDividends" xlink:label="ifrs-full_RevenueFromDividends" xlink:title="ifrs-full_RevenueFromDividends" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_Revenue" xlink:to="ifrs-full_RevenueFromDividends" xlink:title="Calculation : ifrs-full_Revenue to ifrs-full_RevenueFromDividends" order="2" weight="1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="213800X3Q9LSAKRUWY91-2025-12-31.xsd#kbc_NetResultFromFinancialInstrumentsAtFairValueThroughProfitOrLossAndInsuranceFinanceIncomeAndExpense" xlink:label="kbc_NetResultFromFinancialInstrumentsAtFairValueThroughProfitOrLossAndInsuranceFinanceIncomeAndExpense" xlink:title="kbc_NetResultFromFinancialInstrumentsAtFairValueThroughProfitOrLossAndInsuranceFinanceIncomeAndExpense" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_Revenue" xlink:to="kbc_NetResultFromFinancialInstrumentsAtFairValueThroughProfitOrLossAndInsuranceFinanceIncomeAndExpense" xlink:title="Calculation : ifrs-full_Revenue to kbc_NetResultFromFinancialInstrumentsAtFairValueThroughProfitOrLossAndInsuranceFinanceIncomeAndExpense" order="3" weight="1" />
    <link:loc xlink:type="locator" xlink:href="213800X3Q9LSAKRUWY91-2025-12-31.xsd#kbc_NetResultFromFinancialInstrumentsAtFairValueThroughProfitOrLoss" xlink:label="kbc_NetResultFromFinancialInstrumentsAtFairValueThroughProfitOrLoss" xlink:title="kbc_NetResultFromFinancialInstrumentsAtFairValueThroughProfitOrLoss" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="kbc_NetResultFromFinancialInstrumentsAtFairValueThroughProfitOrLossAndInsuranceFinanceIncomeAndExpense" xlink:to="kbc_NetResultFromFinancialInstrumentsAtFairValueThroughProfitOrLoss" xlink:title="Calculation : kbc_NetResultFromFinancialInstrumentsAtFairValueThroughProfitOrLossAndInsuranceFinanceIncomeAndExpense to kbc_NetResultFromFinancialInstrumentsAtFairValueThroughProfitOrLoss" order="0" weight="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_InsuranceFinanceIncomeExpensesFromInsuranceContractsIssuedRecognisedInProfitOrLoss" xlink:label="ifrs-full_InsuranceFinanceIncomeExpensesFromInsuranceContractsIssuedRecognisedInProfitOrLoss" xlink:title="ifrs-full_InsuranceFinanceIncomeExpensesFromInsuranceContractsIssuedRecognisedInProfitOrLoss" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="kbc_NetResultFromFinancialInstrumentsAtFairValueThroughProfitOrLossAndInsuranceFinanceIncomeAndExpense" xlink:to="ifrs-full_InsuranceFinanceIncomeExpensesFromInsuranceContractsIssuedRecognisedInProfitOrLoss" xlink:title="Calculation : kbc_NetResultFromFinancialInstrumentsAtFairValueThroughProfitOrLossAndInsuranceFinanceIncomeAndExpense to ifrs-full_InsuranceFinanceIncomeExpensesFromInsuranceContractsIssuedRecognisedInProfitOrLoss" order="1" weight="1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_FeeAndCommissionIncomeExpense" xlink:label="ifrs-full_FeeAndCommissionIncomeExpense" xlink:title="ifrs-full_FeeAndCommissionIncomeExpense" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_Revenue" xlink:to="ifrs-full_FeeAndCommissionIncomeExpense" xlink:title="Calculation : ifrs-full_Revenue to ifrs-full_FeeAndCommissionIncomeExpense" order="4" weight="1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_FeeAndCommissionIncome" xlink:label="ifrs-full_FeeAndCommissionIncome" xlink:title="ifrs-full_FeeAndCommissionIncome" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_FeeAndCommissionIncomeExpense" xlink:to="ifrs-full_FeeAndCommissionIncome" xlink:title="Calculation : ifrs-full_FeeAndCommissionIncomeExpense to ifrs-full_FeeAndCommissionIncome" order="0" weight="1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_FeeAndCommissionExpense" xlink:label="ifrs-full_FeeAndCommissionExpense" xlink:title="ifrs-full_FeeAndCommissionExpense" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_FeeAndCommissionIncomeExpense" xlink:to="ifrs-full_FeeAndCommissionExpense" xlink:title="Calculation : ifrs-full_FeeAndCommissionIncomeExpense to ifrs-full_FeeAndCommissionExpense" order="1" weight="-1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_OtherIncome" xlink:label="ifrs-full_OtherIncome" xlink:title="ifrs-full_OtherIncome" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_Revenue" xlink:to="ifrs-full_OtherIncome" xlink:title="Calculation : ifrs-full_Revenue to ifrs-full_OtherIncome" order="5" weight="1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_OperatingExpense" xlink:label="ifrs-full_OperatingExpense" xlink:title="ifrs-full_OperatingExpense" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_ProfitLossBeforeTax" xlink:to="ifrs-full_OperatingExpense" xlink:title="Calculation : ifrs-full_ProfitLossBeforeTax to ifrs-full_OperatingExpense" order="1" weight="-1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="213800X3Q9LSAKRUWY91-2025-12-31.xsd#kbc_OperatingExpenseWithoutBankingAndInsuranceTax" xlink:label="kbc_OperatingExpenseWithoutBankingAndInsuranceTax" xlink:title="kbc_OperatingExpenseWithoutBankingAndInsuranceTax" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_OperatingExpense" xlink:to="kbc_OperatingExpenseWithoutBankingAndInsuranceTax" xlink:title="Calculation : ifrs-full_OperatingExpense to kbc_OperatingExpenseWithoutBankingAndInsuranceTax" order="0" weight="1" />
    <link:loc xlink:type="locator" xlink:href="213800X3Q9LSAKRUWY91-2025-12-31.xsd#kbc_BankingAndInsuranceTax" xlink:label="kbc_BankingAndInsuranceTax" xlink:title="kbc_BankingAndInsuranceTax" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_OperatingExpense" xlink:to="kbc_BankingAndInsuranceTax" xlink:title="Calculation : ifrs-full_OperatingExpense to kbc_BankingAndInsuranceTax" order="1" weight="1" />
    <link:loc xlink:type="locator" xlink:href="213800X3Q9LSAKRUWY91-2025-12-31.xsd#kbc_OperatingExpenseAllocatedToInsuranceServiceExpenses" xlink:label="kbc_OperatingExpenseAllocatedToInsuranceServiceExpenses" xlink:title="kbc_OperatingExpenseAllocatedToInsuranceServiceExpenses" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_OperatingExpense" xlink:to="kbc_OperatingExpenseAllocatedToInsuranceServiceExpenses" xlink:title="Calculation : ifrs-full_OperatingExpense to kbc_OperatingExpenseAllocatedToInsuranceServiceExpenses" order="2" weight="-1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_ShareOfProfitLossOfAssociatesAndJointVenturesAccountedForUsingEquityMethod" xlink:label="ifrs-full_ShareOfProfitLossOfAssociatesAndJointVenturesAccountedForUsingEquityMethod" xlink:title="ifrs-full_ShareOfProfitLossOfAssociatesAndJointVenturesAccountedForUsingEquityMethod" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_ProfitLossBeforeTax" xlink:to="ifrs-full_ShareOfProfitLossOfAssociatesAndJointVenturesAccountedForUsingEquityMethod" xlink:title="Calculation : ifrs-full_ProfitLossBeforeTax to ifrs-full_ShareOfProfitLossOfAssociatesAndJointVenturesAccountedForUsingEquityMethod" order="2" weight="1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_ImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss" xlink:label="ifrs-full_ImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss" xlink:title="ifrs-full_ImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_ProfitLossBeforeTax" xlink:to="ifrs-full_ImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss" xlink:title="Calculation : ifrs-full_ProfitLossBeforeTax to ifrs-full_ImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss" order="3" weight="-1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_ImpairmentLossImpairmentGainAndReversalOfImpairmentLossDeterminedInAccordanceWithIFRS9" xlink:label="ifrs-full_ImpairmentLossImpairmentGainAndReversalOfImpairmentLossDeterminedInAccordanceWithIFRS9" xlink:title="ifrs-full_ImpairmentLossImpairmentGainAndReversalOfImpairmentLossDeterminedInAccordanceWithIFRS9" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_ImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss" xlink:to="ifrs-full_ImpairmentLossImpairmentGainAndReversalOfImpairmentLossDeterminedInAccordanceWithIFRS9" xlink:title="Calculation : ifrs-full_ImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss to ifrs-full_ImpairmentLossImpairmentGainAndReversalOfImpairmentLossDeterminedInAccordanceWithIFRS9" order="0" weight="1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_ImpairmentLossRecognisedInProfitOrLossGoodwill" xlink:label="ifrs-full_ImpairmentLossRecognisedInProfitOrLossGoodwill" xlink:title="ifrs-full_ImpairmentLossRecognisedInProfitOrLossGoodwill" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_ImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss" xlink:to="ifrs-full_ImpairmentLossRecognisedInProfitOrLossGoodwill" xlink:title="Calculation : ifrs-full_ImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss to ifrs-full_ImpairmentLossRecognisedInProfitOrLossGoodwill" order="1" weight="1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="213800X3Q9LSAKRUWY91-2025-12-31.xsd#kbc_ImpairmentOther" xlink:label="kbc_ImpairmentOther" xlink:title="kbc_ImpairmentOther" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_ImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss" xlink:to="kbc_ImpairmentOther" xlink:title="Calculation : ifrs-full_ImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss to kbc_ImpairmentOther" order="2" weight="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_InsuranceServiceExpensesFromInsuranceContractsIssued" xlink:label="ifrs-full_InsuranceServiceExpensesFromInsuranceContractsIssued" xlink:title="ifrs-full_InsuranceServiceExpensesFromInsuranceContractsIssued" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_ProfitLossBeforeTax" xlink:to="ifrs-full_InsuranceServiceExpensesFromInsuranceContractsIssued" xlink:title="Calculation : ifrs-full_ProfitLossBeforeTax to ifrs-full_InsuranceServiceExpensesFromInsuranceContractsIssued" order="4" weight="-1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="213800X3Q9LSAKRUWY91-2025-12-31.xsd#kbc_InsuranceServiceExpensesFromNonLifeInsuranceContractsBeforeReinsurance" xlink:label="kbc_InsuranceServiceExpensesFromNonLifeInsuranceContractsBeforeReinsurance" xlink:title="kbc_InsuranceServiceExpensesFromNonLifeInsuranceContractsBeforeReinsurance" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_InsuranceServiceExpensesFromInsuranceContractsIssued" xlink:to="kbc_InsuranceServiceExpensesFromNonLifeInsuranceContractsBeforeReinsurance" xlink:title="Calculation : ifrs-full_InsuranceServiceExpensesFromInsuranceContractsIssued to kbc_InsuranceServiceExpensesFromNonLifeInsuranceContractsBeforeReinsurance" order="0" weight="1" />
    <link:loc xlink:type="locator" xlink:href="213800X3Q9LSAKRUWY91-2025-12-31.xsd#kbc_InsuranceServiceExpensesFromLifeInsuranceContractsBeforeReinsurance" xlink:label="kbc_InsuranceServiceExpensesFromLifeInsuranceContractsBeforeReinsurance" xlink:title="kbc_InsuranceServiceExpensesFromLifeInsuranceContractsBeforeReinsurance" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_InsuranceServiceExpensesFromInsuranceContractsIssued" xlink:to="kbc_InsuranceServiceExpensesFromLifeInsuranceContractsBeforeReinsurance" xlink:title="Calculation : ifrs-full_InsuranceServiceExpensesFromInsuranceContractsIssued to kbc_InsuranceServiceExpensesFromLifeInsuranceContractsBeforeReinsurance" order="1" weight="1" />
    <link:loc xlink:type="locator" xlink:href="213800X3Q9LSAKRUWY91-2025-12-31.xsd#kbc_NetResultFromReinsuranceContractsHeld" xlink:label="kbc_NetResultFromReinsuranceContractsHeld" xlink:title="kbc_NetResultFromReinsuranceContractsHeld" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_ProfitLossBeforeTax" xlink:to="kbc_NetResultFromReinsuranceContractsHeld" xlink:title="Calculation : ifrs-full_ProfitLossBeforeTax to kbc_NetResultFromReinsuranceContractsHeld" order="5" weight="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_IncomeTaxExpenseContinuingOperations" xlink:label="ifrs-full_IncomeTaxExpenseContinuingOperations" xlink:title="ifrs-full_IncomeTaxExpenseContinuingOperations" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_ProfitLoss" xlink:to="ifrs-full_IncomeTaxExpenseContinuingOperations" xlink:title="Calculation : ifrs-full_ProfitLoss to ifrs-full_IncomeTaxExpenseContinuingOperations" order="1" weight="-1" use="optional" />
  </link:calculationLink>
  <link:calculationLink xlink:type="extended" xlink:role="http://www.kbc.com/xbrl/role/Geconsolideerdegerealiseerdeennietgerealiseerderesultaten">
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_ComprehensiveIncome" xlink:label="ifrs-full_ComprehensiveIncome" xlink:title="ifrs-full_ComprehensiveIncome" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_ProfitLoss" xlink:label="ifrs-full_ProfitLoss" xlink:title="ifrs-full_ProfitLoss" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_ComprehensiveIncome" xlink:to="ifrs-full_ProfitLoss" xlink:title="Calculation : ifrs-full_ComprehensiveIncome to ifrs-full_ProfitLoss" order="0" weight="1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_OtherComprehensiveIncome" xlink:label="ifrs-full_OtherComprehensiveIncome" xlink:title="ifrs-full_OtherComprehensiveIncome" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_ComprehensiveIncome" xlink:to="ifrs-full_OtherComprehensiveIncome" xlink:title="Calculation : ifrs-full_ComprehensiveIncome to ifrs-full_OtherComprehensiveIncome" order="1" weight="1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_OtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTax" xlink:label="ifrs-full_OtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTax" xlink:title="ifrs-full_OtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTax" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_OtherComprehensiveIncome" xlink:to="ifrs-full_OtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTax" xlink:title="Calculation : ifrs-full_OtherComprehensiveIncome to ifrs-full_OtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTax" order="0" weight="1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_OtherComprehensiveIncomeNetOfTaxFinancialAssetsMeasuredAtFairValueThroughOtherComprehensiveIncome" xlink:label="ifrs-full_OtherComprehensiveIncomeNetOfTaxFinancialAssetsMeasuredAtFairValueThroughOtherComprehensiveIncome" xlink:title="ifrs-full_OtherComprehensiveIncomeNetOfTaxFinancialAssetsMeasuredAtFairValueThroughOtherComprehensiveIncome" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_OtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTax" xlink:to="ifrs-full_OtherComprehensiveIncomeNetOfTaxFinancialAssetsMeasuredAtFairValueThroughOtherComprehensiveIncome" xlink:title="Calculation : ifrs-full_OtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTax to ifrs-full_OtherComprehensiveIncomeNetOfTaxFinancialAssetsMeasuredAtFairValueThroughOtherComprehensiveIncome" order="0" weight="1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_GainsLossesOnFinancialAssetsMeasuredAtFairValueThroughOtherComprehensiveIncomeBeforeTax" xlink:label="ifrs-full_GainsLossesOnFinancialAssetsMeasuredAtFairValueThroughOtherComprehensiveIncomeBeforeTax" xlink:title="ifrs-full_GainsLossesOnFinancialAssetsMeasuredAtFairValueThroughOtherComprehensiveIncomeBeforeTax" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_OtherComprehensiveIncomeNetOfTaxFinancialAssetsMeasuredAtFairValueThroughOtherComprehensiveIncome" xlink:to="ifrs-full_GainsLossesOnFinancialAssetsMeasuredAtFairValueThroughOtherComprehensiveIncomeBeforeTax" xlink:title="Calculation : ifrs-full_OtherComprehensiveIncomeNetOfTaxFinancialAssetsMeasuredAtFairValueThroughOtherComprehensiveIncome to ifrs-full_GainsLossesOnFinancialAssetsMeasuredAtFairValueThroughOtherComprehensiveIncomeBeforeTax" order="0" weight="1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_IncomeTaxRelatingToFinancialAssetsMeasuredAtFairValueThroughOtherComprehensiveIncome" xlink:label="ifrs-full_IncomeTaxRelatingToFinancialAssetsMeasuredAtFairValueThroughOtherComprehensiveIncome" xlink:title="ifrs-full_IncomeTaxRelatingToFinancialAssetsMeasuredAtFairValueThroughOtherComprehensiveIncome" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_OtherComprehensiveIncomeNetOfTaxFinancialAssetsMeasuredAtFairValueThroughOtherComprehensiveIncome" xlink:to="ifrs-full_IncomeTaxRelatingToFinancialAssetsMeasuredAtFairValueThroughOtherComprehensiveIncome" xlink:title="Calculation : ifrs-full_OtherComprehensiveIncomeNetOfTaxFinancialAssetsMeasuredAtFairValueThroughOtherComprehensiveIncome to ifrs-full_IncomeTaxRelatingToFinancialAssetsMeasuredAtFairValueThroughOtherComprehensiveIncome" order="1" weight="-1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_ReclassificationAdjustmentsOnFinancialAssetsMeasuredAtFairValueThroughOtherComprehensiveIncomeNetOfTax" xlink:label="ifrs-full_ReclassificationAdjustmentsOnFinancialAssetsMeasuredAtFairValueThroughOtherComprehensiveIncomeNetOfTax" xlink:title="ifrs-full_ReclassificationAdjustmentsOnFinancialAssetsMeasuredAtFairValueThroughOtherComprehensiveIncomeNetOfTax" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_OtherComprehensiveIncomeNetOfTaxFinancialAssetsMeasuredAtFairValueThroughOtherComprehensiveIncome" xlink:to="ifrs-full_ReclassificationAdjustmentsOnFinancialAssetsMeasuredAtFairValueThroughOtherComprehensiveIncomeNetOfTax" xlink:title="Calculation : ifrs-full_OtherComprehensiveIncomeNetOfTaxFinancialAssetsMeasuredAtFairValueThroughOtherComprehensiveIncome to ifrs-full_ReclassificationAdjustmentsOnFinancialAssetsMeasuredAtFairValueThroughOtherComprehensiveIncomeNetOfTax" order="2" weight="-1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="213800X3Q9LSAKRUWY91-2025-12-31.xsd#kbc_ReclassificationAdjustmentsOnFinancialAssetsMeasuredAtFairValueThroughOtherComprehensiveIncomeRelatedToImpairment" xlink:label="kbc_ReclassificationAdjustmentsOnFinancialAssetsMeasuredAtFairValueThroughOtherComprehensiveIncomeRelatedToImpairment" xlink:title="kbc_ReclassificationAdjustmentsOnFinancialAssetsMeasuredAtFairValueThroughOtherComprehensiveIncomeRelatedToImpairment" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_ReclassificationAdjustmentsOnFinancialAssetsMeasuredAtFairValueThroughOtherComprehensiveIncomeNetOfTax" xlink:to="kbc_ReclassificationAdjustmentsOnFinancialAssetsMeasuredAtFairValueThroughOtherComprehensiveIncomeRelatedToImpairment" xlink:title="Calculation : ifrs-full_ReclassificationAdjustmentsOnFinancialAssetsMeasuredAtFairValueThroughOtherComprehensiveIncomeNetOfTax to kbc_ReclassificationAdjustmentsOnFinancialAssetsMeasuredAtFairValueThroughOtherComprehensiveIncomeRelatedToImpairment" order="0" weight="1" />
    <link:loc xlink:type="locator" xlink:href="213800X3Q9LSAKRUWY91-2025-12-31.xsd#kbc_ReclassificationAdjustmentsOnFinancialAssetsMeasuredAtFairValueThroughOtherComprehensiveIncomeRelatedToNetGainsOrLossesOnDisposal" xlink:label="kbc_ReclassificationAdjustmentsOnFinancialAssetsMeasuredAtFairValueThroughOtherComprehensiveIncomeRelatedToNetGainsOrLossesOnDisposal" xlink:title="kbc_ReclassificationAdjustmentsOnFinancialAssetsMeasuredAtFairValueThroughOtherComprehensiveIncomeRelatedToNetGainsOrLossesOnDisposal" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_ReclassificationAdjustmentsOnFinancialAssetsMeasuredAtFairValueThroughOtherComprehensiveIncomeNetOfTax" xlink:to="kbc_ReclassificationAdjustmentsOnFinancialAssetsMeasuredAtFairValueThroughOtherComprehensiveIncomeRelatedToNetGainsOrLossesOnDisposal" xlink:title="Calculation : ifrs-full_ReclassificationAdjustmentsOnFinancialAssetsMeasuredAtFairValueThroughOtherComprehensiveIncomeNetOfTax to kbc_ReclassificationAdjustmentsOnFinancialAssetsMeasuredAtFairValueThroughOtherComprehensiveIncomeRelatedToNetGainsOrLossesOnDisposal" order="1" weight="1" />
    <link:loc xlink:type="locator" xlink:href="213800X3Q9LSAKRUWY91-2025-12-31.xsd#kbc_ReclassificationAdjustmentsOnFinancialAssetsMeasuredAtFairValueThroughOtherComprehensiveIncomeRelatedToDeferredTaxesOnIncome" xlink:label="kbc_ReclassificationAdjustmentsOnFinancialAssetsMeasuredAtFairValueThroughOtherComprehensiveIncomeRelatedToDeferredTaxesOnIncome" xlink:title="kbc_ReclassificationAdjustmentsOnFinancialAssetsMeasuredAtFairValueThroughOtherComprehensiveIncomeRelatedToDeferredTaxesOnIncome" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_ReclassificationAdjustmentsOnFinancialAssetsMeasuredAtFairValueThroughOtherComprehensiveIncomeNetOfTax" xlink:to="kbc_ReclassificationAdjustmentsOnFinancialAssetsMeasuredAtFairValueThroughOtherComprehensiveIncomeRelatedToDeferredTaxesOnIncome" xlink:title="Calculation : ifrs-full_ReclassificationAdjustmentsOnFinancialAssetsMeasuredAtFairValueThroughOtherComprehensiveIncomeNetOfTax to kbc_ReclassificationAdjustmentsOnFinancialAssetsMeasuredAtFairValueThroughOtherComprehensiveIncomeRelatedToDeferredTaxesOnIncome" order="2" weight="-1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_OtherComprehensiveIncomeNetOfTaxCashFlowHedges" xlink:label="ifrs-full_OtherComprehensiveIncomeNetOfTaxCashFlowHedges" xlink:title="ifrs-full_OtherComprehensiveIncomeNetOfTaxCashFlowHedges" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_OtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTax" xlink:to="ifrs-full_OtherComprehensiveIncomeNetOfTaxCashFlowHedges" xlink:title="Calculation : ifrs-full_OtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTax to ifrs-full_OtherComprehensiveIncomeNetOfTaxCashFlowHedges" order="1" weight="1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_GainsLossesOnCashFlowHedgesBeforeTax" xlink:label="ifrs-full_GainsLossesOnCashFlowHedgesBeforeTax" xlink:title="ifrs-full_GainsLossesOnCashFlowHedgesBeforeTax" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_OtherComprehensiveIncomeNetOfTaxCashFlowHedges" xlink:to="ifrs-full_GainsLossesOnCashFlowHedgesBeforeTax" xlink:title="Calculation : ifrs-full_OtherComprehensiveIncomeNetOfTaxCashFlowHedges to ifrs-full_GainsLossesOnCashFlowHedgesBeforeTax" order="0" weight="1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_IncomeTaxRelatingToCashFlowHedgesOfOtherComprehensiveIncome" xlink:label="ifrs-full_IncomeTaxRelatingToCashFlowHedgesOfOtherComprehensiveIncome" xlink:title="ifrs-full_IncomeTaxRelatingToCashFlowHedgesOfOtherComprehensiveIncome" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_OtherComprehensiveIncomeNetOfTaxCashFlowHedges" xlink:to="ifrs-full_IncomeTaxRelatingToCashFlowHedgesOfOtherComprehensiveIncome" xlink:title="Calculation : ifrs-full_OtherComprehensiveIncomeNetOfTaxCashFlowHedges to ifrs-full_IncomeTaxRelatingToCashFlowHedgesOfOtherComprehensiveIncome" order="1" weight="-1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_ReclassificationAdjustmentsOnCashFlowHedgesNetOfTax" xlink:label="ifrs-full_ReclassificationAdjustmentsOnCashFlowHedgesNetOfTax" xlink:title="ifrs-full_ReclassificationAdjustmentsOnCashFlowHedgesNetOfTax" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_OtherComprehensiveIncomeNetOfTaxCashFlowHedges" xlink:to="ifrs-full_ReclassificationAdjustmentsOnCashFlowHedgesNetOfTax" xlink:title="Calculation : ifrs-full_OtherComprehensiveIncomeNetOfTaxCashFlowHedges to ifrs-full_ReclassificationAdjustmentsOnCashFlowHedgesNetOfTax" order="2" weight="-1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_ReclassificationAdjustmentsOnCashFlowHedgesBeforeTax" xlink:label="ifrs-full_ReclassificationAdjustmentsOnCashFlowHedgesBeforeTax" xlink:title="ifrs-full_ReclassificationAdjustmentsOnCashFlowHedgesBeforeTax" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_ReclassificationAdjustmentsOnCashFlowHedgesNetOfTax" xlink:to="ifrs-full_ReclassificationAdjustmentsOnCashFlowHedgesBeforeTax" xlink:title="Calculation : ifrs-full_ReclassificationAdjustmentsOnCashFlowHedgesNetOfTax to ifrs-full_ReclassificationAdjustmentsOnCashFlowHedgesBeforeTax" order="0" weight="1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="213800X3Q9LSAKRUWY91-2025-12-31.xsd#kbc_TransferFromReserveToNetResultDeferredTaxesOnIncomeRelatedToCashFlowHedges" xlink:label="kbc_TransferFromReserveToNetResultDeferredTaxesOnIncomeRelatedToCashFlowHedges" xlink:title="kbc_TransferFromReserveToNetResultDeferredTaxesOnIncomeRelatedToCashFlowHedges" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_ReclassificationAdjustmentsOnCashFlowHedgesNetOfTax" xlink:to="kbc_TransferFromReserveToNetResultDeferredTaxesOnIncomeRelatedToCashFlowHedges" xlink:title="Calculation : ifrs-full_ReclassificationAdjustmentsOnCashFlowHedgesNetOfTax to kbc_TransferFromReserveToNetResultDeferredTaxesOnIncomeRelatedToCashFlowHedges" order="1" weight="-1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_OtherComprehensiveIncomeNetOfTaxExchangeDifferencesOnTranslation" xlink:label="ifrs-full_OtherComprehensiveIncomeNetOfTaxExchangeDifferencesOnTranslation" xlink:title="ifrs-full_OtherComprehensiveIncomeNetOfTaxExchangeDifferencesOnTranslation" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_OtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTax" xlink:to="ifrs-full_OtherComprehensiveIncomeNetOfTaxExchangeDifferencesOnTranslation" xlink:title="Calculation : ifrs-full_OtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTax to ifrs-full_OtherComprehensiveIncomeNetOfTaxExchangeDifferencesOnTranslation" order="2" weight="1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_OtherComprehensiveIncomeBeforeTaxExchangeDifferencesOnTranslation" xlink:label="ifrs-full_OtherComprehensiveIncomeBeforeTaxExchangeDifferencesOnTranslation" xlink:title="ifrs-full_OtherComprehensiveIncomeBeforeTaxExchangeDifferencesOnTranslation" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_OtherComprehensiveIncomeNetOfTaxExchangeDifferencesOnTranslation" xlink:to="ifrs-full_OtherComprehensiveIncomeBeforeTaxExchangeDifferencesOnTranslation" xlink:title="Calculation : ifrs-full_OtherComprehensiveIncomeNetOfTaxExchangeDifferencesOnTranslation to ifrs-full_OtherComprehensiveIncomeBeforeTaxExchangeDifferencesOnTranslation" order="0" weight="1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_IncomeTaxRelatingToExchangeDifferencesOnTranslationOfOtherComprehensiveIncome" xlink:label="ifrs-full_IncomeTaxRelatingToExchangeDifferencesOnTranslationOfOtherComprehensiveIncome" xlink:title="ifrs-full_IncomeTaxRelatingToExchangeDifferencesOnTranslationOfOtherComprehensiveIncome" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_OtherComprehensiveIncomeNetOfTaxExchangeDifferencesOnTranslation" xlink:to="ifrs-full_IncomeTaxRelatingToExchangeDifferencesOnTranslationOfOtherComprehensiveIncome" xlink:title="Calculation : ifrs-full_OtherComprehensiveIncomeNetOfTaxExchangeDifferencesOnTranslation to ifrs-full_IncomeTaxRelatingToExchangeDifferencesOnTranslationOfOtherComprehensiveIncome" order="1" weight="-1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_OtherComprehensiveIncomeNetOfTaxHedgesOfNetInvestmentsInForeignOperations" xlink:label="ifrs-full_OtherComprehensiveIncomeNetOfTaxHedgesOfNetInvestmentsInForeignOperations" xlink:title="ifrs-full_OtherComprehensiveIncomeNetOfTaxHedgesOfNetInvestmentsInForeignOperations" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_OtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTax" xlink:to="ifrs-full_OtherComprehensiveIncomeNetOfTaxHedgesOfNetInvestmentsInForeignOperations" xlink:title="Calculation : ifrs-full_OtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTax to ifrs-full_OtherComprehensiveIncomeNetOfTaxHedgesOfNetInvestmentsInForeignOperations" order="3" weight="1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_GainsLossesOnHedgesOfNetInvestmentsInForeignOperationsBeforeTax" xlink:label="ifrs-full_GainsLossesOnHedgesOfNetInvestmentsInForeignOperationsBeforeTax" xlink:title="ifrs-full_GainsLossesOnHedgesOfNetInvestmentsInForeignOperationsBeforeTax" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_OtherComprehensiveIncomeNetOfTaxHedgesOfNetInvestmentsInForeignOperations" xlink:to="ifrs-full_GainsLossesOnHedgesOfNetInvestmentsInForeignOperationsBeforeTax" xlink:title="Calculation : ifrs-full_OtherComprehensiveIncomeNetOfTaxHedgesOfNetInvestmentsInForeignOperations to ifrs-full_GainsLossesOnHedgesOfNetInvestmentsInForeignOperationsBeforeTax" order="0" weight="1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_IncomeTaxRelatingToHedgesOfNetInvestmentsInForeignOperationsOfOtherComprehensiveIncome" xlink:label="ifrs-full_IncomeTaxRelatingToHedgesOfNetInvestmentsInForeignOperationsOfOtherComprehensiveIncome" xlink:title="ifrs-full_IncomeTaxRelatingToHedgesOfNetInvestmentsInForeignOperationsOfOtherComprehensiveIncome" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_OtherComprehensiveIncomeNetOfTaxHedgesOfNetInvestmentsInForeignOperations" xlink:to="ifrs-full_IncomeTaxRelatingToHedgesOfNetInvestmentsInForeignOperationsOfOtherComprehensiveIncome" xlink:title="Calculation : ifrs-full_OtherComprehensiveIncomeNetOfTaxHedgesOfNetInvestmentsInForeignOperations to ifrs-full_IncomeTaxRelatingToHedgesOfNetInvestmentsInForeignOperationsOfOtherComprehensiveIncome" order="1" weight="-1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_ReclassificationAdjustmentsOnHedgesOfNetInvestmentsInForeignOperationsNetOfTax" xlink:label="ifrs-full_ReclassificationAdjustmentsOnHedgesOfNetInvestmentsInForeignOperationsNetOfTax" xlink:title="ifrs-full_ReclassificationAdjustmentsOnHedgesOfNetInvestmentsInForeignOperationsNetOfTax" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_OtherComprehensiveIncomeNetOfTaxHedgesOfNetInvestmentsInForeignOperations" xlink:to="ifrs-full_ReclassificationAdjustmentsOnHedgesOfNetInvestmentsInForeignOperationsNetOfTax" xlink:title="Calculation : ifrs-full_OtherComprehensiveIncomeNetOfTaxHedgesOfNetInvestmentsInForeignOperations to ifrs-full_ReclassificationAdjustmentsOnHedgesOfNetInvestmentsInForeignOperationsNetOfTax" order="2" weight="-1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_ReclassificationAdjustmentsOnHedgesOfNetInvestmentsInForeignOperationsBeforeTax" xlink:label="ifrs-full_ReclassificationAdjustmentsOnHedgesOfNetInvestmentsInForeignOperationsBeforeTax" xlink:title="ifrs-full_ReclassificationAdjustmentsOnHedgesOfNetInvestmentsInForeignOperationsBeforeTax" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_ReclassificationAdjustmentsOnHedgesOfNetInvestmentsInForeignOperationsNetOfTax" xlink:to="ifrs-full_ReclassificationAdjustmentsOnHedgesOfNetInvestmentsInForeignOperationsBeforeTax" xlink:title="Calculation : ifrs-full_ReclassificationAdjustmentsOnHedgesOfNetInvestmentsInForeignOperationsNetOfTax to ifrs-full_ReclassificationAdjustmentsOnHedgesOfNetInvestmentsInForeignOperationsBeforeTax" order="0" weight="1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="213800X3Q9LSAKRUWY91-2025-12-31.xsd#kbc_TransferFromReserveToNetResultDeferredTaxesOnIncomeRelatedToHedgeOfNetInvestmentsInForeignOperations" xlink:label="kbc_TransferFromReserveToNetResultDeferredTaxesOnIncomeRelatedToHedgeOfNetInvestmentsInForeignOperations" xlink:title="kbc_TransferFromReserveToNetResultDeferredTaxesOnIncomeRelatedToHedgeOfNetInvestmentsInForeignOperations" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_ReclassificationAdjustmentsOnHedgesOfNetInvestmentsInForeignOperationsNetOfTax" xlink:to="kbc_TransferFromReserveToNetResultDeferredTaxesOnIncomeRelatedToHedgeOfNetInvestmentsInForeignOperations" xlink:title="Calculation : ifrs-full_ReclassificationAdjustmentsOnHedgesOfNetInvestmentsInForeignOperationsNetOfTax to kbc_TransferFromReserveToNetResultDeferredTaxesOnIncomeRelatedToHedgeOfNetInvestmentsInForeignOperations" order="1" weight="-1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_ShareOfOtherComprehensiveIncomeOfAssociatesAndJointVenturesAccountedForUsingEquityMethodThatWillBeReclassifiedToProfitOrLossNetOfTax" xlink:label="ifrs-full_ShareOfOtherComprehensiveIncomeOfAssociatesAndJointVenturesAccountedForUsingEquityMethodThatWillBeReclassifiedToProfitOrLossNetOfTax" xlink:title="ifrs-full_ShareOfOtherComprehensiveIncomeOfAssociatesAndJointVenturesAccountedForUsingEquityMethodThatWillBeReclassifiedToProfitOrLossNetOfTax" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_OtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTax" xlink:to="ifrs-full_ShareOfOtherComprehensiveIncomeOfAssociatesAndJointVenturesAccountedForUsingEquityMethodThatWillBeReclassifiedToProfitOrLossNetOfTax" xlink:title="Calculation : ifrs-full_OtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTax to ifrs-full_ShareOfOtherComprehensiveIncomeOfAssociatesAndJointVenturesAccountedForUsingEquityMethodThatWillBeReclassifiedToProfitOrLossNetOfTax" order="4" weight="1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_ShareOfOtherComprehensiveIncomeOfAssociatesAndJointVenturesAccountedForUsingEquityMethodThatWillBeReclassifiedToProfitOrLossBeforeTax" xlink:label="ifrs-full_ShareOfOtherComprehensiveIncomeOfAssociatesAndJointVenturesAccountedForUsingEquityMethodThatWillBeReclassifiedToProfitOrLossBeforeTax" xlink:title="ifrs-full_ShareOfOtherComprehensiveIncomeOfAssociatesAndJointVenturesAccountedForUsingEquityMethodThatWillBeReclassifiedToProfitOrLossBeforeTax" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_ShareOfOtherComprehensiveIncomeOfAssociatesAndJointVenturesAccountedForUsingEquityMethodThatWillBeReclassifiedToProfitOrLossNetOfTax" xlink:to="ifrs-full_ShareOfOtherComprehensiveIncomeOfAssociatesAndJointVenturesAccountedForUsingEquityMethodThatWillBeReclassifiedToProfitOrLossBeforeTax" xlink:title="Calculation : ifrs-full_ShareOfOtherComprehensiveIncomeOfAssociatesAndJointVenturesAccountedForUsingEquityMethodThatWillBeReclassifiedToProfitOrLossNetOfTax to ifrs-full_ShareOfOtherComprehensiveIncomeOfAssociatesAndJointVenturesAccountedForUsingEquityMethodThatWillBeReclassifiedToProfitOrLossBeforeTax" order="0" weight="1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_IncomeTaxRelatingToShareOfOtherComprehensiveIncomeOfAssociatesAndJointVenturesAccountedForUsingEquityMethodThatWillBeReclassifiedToProfitOrLoss" xlink:label="ifrs-full_IncomeTaxRelatingToShareOfOtherComprehensiveIncomeOfAssociatesAndJointVenturesAccountedForUsingEquityMethodThatWillBeReclassifiedToProfitOrLoss" xlink:title="ifrs-full_IncomeTaxRelatingToShareOfOtherComprehensiveIncomeOfAssociatesAndJointVenturesAccountedForUsingEquityMethodThatWillBeReclassifiedToProfitOrLoss" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_ShareOfOtherComprehensiveIncomeOfAssociatesAndJointVenturesAccountedForUsingEquityMethodThatWillBeReclassifiedToProfitOrLossNetOfTax" xlink:to="ifrs-full_IncomeTaxRelatingToShareOfOtherComprehensiveIncomeOfAssociatesAndJointVenturesAccountedForUsingEquityMethodThatWillBeReclassifiedToProfitOrLoss" xlink:title="Calculation : ifrs-full_ShareOfOtherComprehensiveIncomeOfAssociatesAndJointVenturesAccountedForUsingEquityMethodThatWillBeReclassifiedToProfitOrLossNetOfTax to ifrs-full_IncomeTaxRelatingToShareOfOtherComprehensiveIncomeOfAssociatesAndJointVenturesAccountedForUsingEquityMethodThatWillBeReclassifiedToProfitOrLoss" order="1" weight="-1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_OtherComponentsOfOtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTax" xlink:label="ifrs-full_OtherComponentsOfOtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTax" xlink:title="ifrs-full_OtherComponentsOfOtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTax" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_OtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTax" xlink:to="ifrs-full_OtherComponentsOfOtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTax" xlink:title="Calculation : ifrs-full_OtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTax to ifrs-full_OtherComponentsOfOtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTax" order="5" weight="1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="213800X3Q9LSAKRUWY91-2025-12-31.xsd#kbc_OtherComprehensiveIncomeNetOfTaxInsuranceFinanceIncomeExpensesFromInsuranceContractsIssuedAndReinsuranceContractsHeldExcludedFromProfitOrLossThatWillBeReclassifiedToProfitOrLoss" xlink:label="kbc_OtherComprehensiveIncomeNetOfTaxInsuranceFinanceIncomeExpensesFromInsuranceContractsIssuedAndReinsuranceContractsHeldExcludedFromProfitOrLossThatWillBeReclassifiedToProfitOrLoss" xlink:title="kbc_OtherComprehensiveIncomeNetOfTaxInsuranceFinanceIncomeExpensesFromInsuranceContractsIssuedAndReinsuranceContractsHeldExcludedFromProfitOrLossThatWillBeReclassifiedToProfitOrLoss" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_OtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTax" xlink:to="kbc_OtherComprehensiveIncomeNetOfTaxInsuranceFinanceIncomeExpensesFromInsuranceContractsIssuedAndReinsuranceContractsHeldExcludedFromProfitOrLossThatWillBeReclassifiedToProfitOrLoss" xlink:title="Calculation : ifrs-full_OtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTax to kbc_OtherComprehensiveIncomeNetOfTaxInsuranceFinanceIncomeExpensesFromInsuranceContractsIssuedAndReinsuranceContractsHeldExcludedFromProfitOrLossThatWillBeReclassifiedToProfitOrLoss" order="6" weight="1" />
    <link:loc xlink:type="locator" xlink:href="213800X3Q9LSAKRUWY91-2025-12-31.xsd#kbc_InsuranceFinanceIncomeExpensesFromInsuranceContractsIssuedAndReinsuranceContractsHeldExcludedFromProfitOrLossThatWillBeReclassifiedToProfitOrLossBeforeTax" xlink:label="kbc_InsuranceFinanceIncomeExpensesFromInsuranceContractsIssuedAndReinsuranceContractsHeldExcludedFromProfitOrLossThatWillBeReclassifiedToProfitOrLossBeforeTax" xlink:title="kbc_InsuranceFinanceIncomeExpensesFromInsuranceContractsIssuedAndReinsuranceContractsHeldExcludedFromProfitOrLossThatWillBeReclassifiedToProfitOrLossBeforeTax" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="kbc_OtherComprehensiveIncomeNetOfTaxInsuranceFinanceIncomeExpensesFromInsuranceContractsIssuedAndReinsuranceContractsHeldExcludedFromProfitOrLossThatWillBeReclassifiedToProfitOrLoss" xlink:to="kbc_InsuranceFinanceIncomeExpensesFromInsuranceContractsIssuedAndReinsuranceContractsHeldExcludedFromProfitOrLossThatWillBeReclassifiedToProfitOrLossBeforeTax" xlink:title="Calculation : kbc_OtherComprehensiveIncomeNetOfTaxInsuranceFinanceIncomeExpensesFromInsuranceContractsIssuedAndReinsuranceContractsHeldExcludedFromProfitOrLossThatWillBeReclassifiedToProfitOrLoss to kbc_InsuranceFinanceIncomeExpensesFromInsuranceContractsIssuedAndReinsuranceContractsHeldExcludedFromProfitOrLossThatWillBeReclassifiedToProfitOrLossBeforeTax" order="0" weight="1" />
    <link:loc xlink:type="locator" xlink:href="213800X3Q9LSAKRUWY91-2025-12-31.xsd#kbc_IncomeTaxRelatingToInsuranceFinanceIncomeExpensesFromInsuranceContractsIssuedAndReinsuranceContractsHeldOfOtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLoss" xlink:label="kbc_IncomeTaxRelatingToInsuranceFinanceIncomeExpensesFromInsuranceContractsIssuedAndReinsuranceContractsHeldOfOtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLoss" xlink:title="kbc_IncomeTaxRelatingToInsuranceFinanceIncomeExpensesFromInsuranceContractsIssuedAndReinsuranceContractsHeldOfOtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLoss" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="kbc_OtherComprehensiveIncomeNetOfTaxInsuranceFinanceIncomeExpensesFromInsuranceContractsIssuedAndReinsuranceContractsHeldExcludedFromProfitOrLossThatWillBeReclassifiedToProfitOrLoss" xlink:to="kbc_IncomeTaxRelatingToInsuranceFinanceIncomeExpensesFromInsuranceContractsIssuedAndReinsuranceContractsHeldOfOtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLoss" xlink:title="Calculation : kbc_OtherComprehensiveIncomeNetOfTaxInsuranceFinanceIncomeExpensesFromInsuranceContractsIssuedAndReinsuranceContractsHeldExcludedFromProfitOrLossThatWillBeReclassifiedToProfitOrLoss to kbc_IncomeTaxRelatingToInsuranceFinanceIncomeExpensesFromInsuranceContractsIssuedAndReinsuranceContractsHeldOfOtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLoss" order="1" weight="-1" />
    <link:loc xlink:type="locator" xlink:href="213800X3Q9LSAKRUWY91-2025-12-31.xsd#kbc_ReclassificationAdjustmentsOnInsuranceFinanceIncomeExpensesFromInsuranceContractsIssuedAndReinsuranceContractsHeldExcludedFromProfitOrLossNetOfTax" xlink:label="kbc_ReclassificationAdjustmentsOnInsuranceFinanceIncomeExpensesFromInsuranceContractsIssuedAndReinsuranceContractsHeldExcludedFromProfitOrLossNetOfTax" xlink:title="kbc_ReclassificationAdjustmentsOnInsuranceFinanceIncomeExpensesFromInsuranceContractsIssuedAndReinsuranceContractsHeldExcludedFromProfitOrLossNetOfTax" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="kbc_OtherComprehensiveIncomeNetOfTaxInsuranceFinanceIncomeExpensesFromInsuranceContractsIssuedAndReinsuranceContractsHeldExcludedFromProfitOrLossThatWillBeReclassifiedToProfitOrLoss" xlink:to="kbc_ReclassificationAdjustmentsOnInsuranceFinanceIncomeExpensesFromInsuranceContractsIssuedAndReinsuranceContractsHeldExcludedFromProfitOrLossNetOfTax" xlink:title="Calculation : kbc_OtherComprehensiveIncomeNetOfTaxInsuranceFinanceIncomeExpensesFromInsuranceContractsIssuedAndReinsuranceContractsHeldExcludedFromProfitOrLossThatWillBeReclassifiedToProfitOrLoss to kbc_ReclassificationAdjustmentsOnInsuranceFinanceIncomeExpensesFromInsuranceContractsIssuedAndReinsuranceContractsHeldExcludedFromProfitOrLossNetOfTax" order="2" weight="-1" />
    <link:loc xlink:type="locator" xlink:href="213800X3Q9LSAKRUWY91-2025-12-31.xsd#kbc_ReclassificationAdjustmentsOnInsuranceFinanceIncomeExpensesFromInsuranceContractsIssuedAndReinsuranceContractsHeldExcludedFromProfitOrLossBeforeTax" xlink:label="kbc_ReclassificationAdjustmentsOnInsuranceFinanceIncomeExpensesFromInsuranceContractsIssuedAndReinsuranceContractsHeldExcludedFromProfitOrLossBeforeTax" xlink:title="kbc_ReclassificationAdjustmentsOnInsuranceFinanceIncomeExpensesFromInsuranceContractsIssuedAndReinsuranceContractsHeldExcludedFromProfitOrLossBeforeTax" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="kbc_ReclassificationAdjustmentsOnInsuranceFinanceIncomeExpensesFromInsuranceContractsIssuedAndReinsuranceContractsHeldExcludedFromProfitOrLossNetOfTax" xlink:to="kbc_ReclassificationAdjustmentsOnInsuranceFinanceIncomeExpensesFromInsuranceContractsIssuedAndReinsuranceContractsHeldExcludedFromProfitOrLossBeforeTax" xlink:title="Calculation : kbc_ReclassificationAdjustmentsOnInsuranceFinanceIncomeExpensesFromInsuranceContractsIssuedAndReinsuranceContractsHeldExcludedFromProfitOrLossNetOfTax to kbc_ReclassificationAdjustmentsOnInsuranceFinanceIncomeExpensesFromInsuranceContractsIssuedAndReinsuranceContractsHeldExcludedFromProfitOrLossBeforeTax" order="0" weight="1" />
    <link:loc xlink:type="locator" xlink:href="213800X3Q9LSAKRUWY91-2025-12-31.xsd#kbc_TransferFromReserveToNetResultDeferredTaxesOnIncomeRelatedToInsuranceFinanceIncomeExpensesFromInsuranceContractsIssuedAndReinsuranceContractsHeldExcludedFromProfitOrLoss" xlink:label="kbc_TransferFromReserveToNetResultDeferredTaxesOnIncomeRelatedToInsuranceFinanceIncomeExpensesFromInsuranceContractsIssuedAndReinsuranceContractsHeldExcludedFromProfitOrLoss" xlink:title="kbc_TransferFromReserveToNetResultDeferredTaxesOnIncomeRelatedToInsuranceFinanceIncomeExpensesFromInsuranceContractsIssuedAndReinsuranceContractsHeldExcludedFromProfitOrLoss" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="kbc_ReclassificationAdjustmentsOnInsuranceFinanceIncomeExpensesFromInsuranceContractsIssuedAndReinsuranceContractsHeldExcludedFromProfitOrLossNetOfTax" xlink:to="kbc_TransferFromReserveToNetResultDeferredTaxesOnIncomeRelatedToInsuranceFinanceIncomeExpensesFromInsuranceContractsIssuedAndReinsuranceContractsHeldExcludedFromProfitOrLoss" xlink:title="Calculation : kbc_ReclassificationAdjustmentsOnInsuranceFinanceIncomeExpensesFromInsuranceContractsIssuedAndReinsuranceContractsHeldExcludedFromProfitOrLossNetOfTax to kbc_TransferFromReserveToNetResultDeferredTaxesOnIncomeRelatedToInsuranceFinanceIncomeExpensesFromInsuranceContractsIssuedAndReinsuranceContractsHeldExcludedFromProfitOrLoss" order="1" weight="-1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_OtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossNetOfTax" xlink:label="ifrs-full_OtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossNetOfTax" xlink:title="ifrs-full_OtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossNetOfTax" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_OtherComprehensiveIncome" xlink:to="ifrs-full_OtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossNetOfTax" xlink:title="Calculation : ifrs-full_OtherComprehensiveIncome to ifrs-full_OtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossNetOfTax" order="1" weight="1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_OtherComprehensiveIncomeNetOfTaxGainsLossesOnRemeasurementsOfDefinedBenefitPlans" xlink:label="ifrs-full_OtherComprehensiveIncomeNetOfTaxGainsLossesOnRemeasurementsOfDefinedBenefitPlans" xlink:title="ifrs-full_OtherComprehensiveIncomeNetOfTaxGainsLossesOnRemeasurementsOfDefinedBenefitPlans" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_OtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossNetOfTax" xlink:to="ifrs-full_OtherComprehensiveIncomeNetOfTaxGainsLossesOnRemeasurementsOfDefinedBenefitPlans" xlink:title="Calculation : ifrs-full_OtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossNetOfTax to ifrs-full_OtherComprehensiveIncomeNetOfTaxGainsLossesOnRemeasurementsOfDefinedBenefitPlans" order="0" weight="1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_OtherComprehensiveIncomeBeforeTaxGainsLossesOnRemeasurementsOfDefinedBenefitPlans" xlink:label="ifrs-full_OtherComprehensiveIncomeBeforeTaxGainsLossesOnRemeasurementsOfDefinedBenefitPlans" xlink:title="ifrs-full_OtherComprehensiveIncomeBeforeTaxGainsLossesOnRemeasurementsOfDefinedBenefitPlans" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_OtherComprehensiveIncomeNetOfTaxGainsLossesOnRemeasurementsOfDefinedBenefitPlans" xlink:to="ifrs-full_OtherComprehensiveIncomeBeforeTaxGainsLossesOnRemeasurementsOfDefinedBenefitPlans" xlink:title="Calculation : ifrs-full_OtherComprehensiveIncomeNetOfTaxGainsLossesOnRemeasurementsOfDefinedBenefitPlans to ifrs-full_OtherComprehensiveIncomeBeforeTaxGainsLossesOnRemeasurementsOfDefinedBenefitPlans" order="0" weight="1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_IncomeTaxRelatingToRemeasurementsOfDefinedBenefitPlansOfOtherComprehensiveIncome" xlink:label="ifrs-full_IncomeTaxRelatingToRemeasurementsOfDefinedBenefitPlansOfOtherComprehensiveIncome" xlink:title="ifrs-full_IncomeTaxRelatingToRemeasurementsOfDefinedBenefitPlansOfOtherComprehensiveIncome" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_OtherComprehensiveIncomeNetOfTaxGainsLossesOnRemeasurementsOfDefinedBenefitPlans" xlink:to="ifrs-full_IncomeTaxRelatingToRemeasurementsOfDefinedBenefitPlansOfOtherComprehensiveIncome" xlink:title="Calculation : ifrs-full_OtherComprehensiveIncomeNetOfTaxGainsLossesOnRemeasurementsOfDefinedBenefitPlans to ifrs-full_IncomeTaxRelatingToRemeasurementsOfDefinedBenefitPlansOfOtherComprehensiveIncome" order="1" weight="-1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_OtherComprehensiveIncomeNetOfTaxChangeInFairValueOfFinancialLiabilityAttributableToChangeInCreditRiskOfLiability" xlink:label="ifrs-full_OtherComprehensiveIncomeNetOfTaxChangeInFairValueOfFinancialLiabilityAttributableToChangeInCreditRiskOfLiability" xlink:title="ifrs-full_OtherComprehensiveIncomeNetOfTaxChangeInFairValueOfFinancialLiabilityAttributableToChangeInCreditRiskOfLiability" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_OtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossNetOfTax" xlink:to="ifrs-full_OtherComprehensiveIncomeNetOfTaxChangeInFairValueOfFinancialLiabilityAttributableToChangeInCreditRiskOfLiability" xlink:title="Calculation : ifrs-full_OtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossNetOfTax to ifrs-full_OtherComprehensiveIncomeNetOfTaxChangeInFairValueOfFinancialLiabilityAttributableToChangeInCreditRiskOfLiability" order="1" weight="1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_OtherComprehensiveIncomeBeforeTaxChangeInFairValueOfFinancialLiabilityAttributableToChangeInCreditRiskOfLiability" xlink:label="ifrs-full_OtherComprehensiveIncomeBeforeTaxChangeInFairValueOfFinancialLiabilityAttributableToChangeInCreditRiskOfLiability" xlink:title="ifrs-full_OtherComprehensiveIncomeBeforeTaxChangeInFairValueOfFinancialLiabilityAttributableToChangeInCreditRiskOfLiability" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_OtherComprehensiveIncomeNetOfTaxChangeInFairValueOfFinancialLiabilityAttributableToChangeInCreditRiskOfLiability" xlink:to="ifrs-full_OtherComprehensiveIncomeBeforeTaxChangeInFairValueOfFinancialLiabilityAttributableToChangeInCreditRiskOfLiability" xlink:title="Calculation : ifrs-full_OtherComprehensiveIncomeNetOfTaxChangeInFairValueOfFinancialLiabilityAttributableToChangeInCreditRiskOfLiability to ifrs-full_OtherComprehensiveIncomeBeforeTaxChangeInFairValueOfFinancialLiabilityAttributableToChangeInCreditRiskOfLiability" order="0" weight="1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_IncomeTaxRelatingToChangesInFairValueOfFinancialLiabilityAttributableToChangeInCreditRiskOfLiabilityOfOtherComprehensiveIncome" xlink:label="ifrs-full_IncomeTaxRelatingToChangesInFairValueOfFinancialLiabilityAttributableToChangeInCreditRiskOfLiabilityOfOtherComprehensiveIncome" xlink:title="ifrs-full_IncomeTaxRelatingToChangesInFairValueOfFinancialLiabilityAttributableToChangeInCreditRiskOfLiabilityOfOtherComprehensiveIncome" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_OtherComprehensiveIncomeNetOfTaxChangeInFairValueOfFinancialLiabilityAttributableToChangeInCreditRiskOfLiability" xlink:to="ifrs-full_IncomeTaxRelatingToChangesInFairValueOfFinancialLiabilityAttributableToChangeInCreditRiskOfLiabilityOfOtherComprehensiveIncome" xlink:title="Calculation : ifrs-full_OtherComprehensiveIncomeNetOfTaxChangeInFairValueOfFinancialLiabilityAttributableToChangeInCreditRiskOfLiability to ifrs-full_IncomeTaxRelatingToChangesInFairValueOfFinancialLiabilityAttributableToChangeInCreditRiskOfLiabilityOfOtherComprehensiveIncome" order="1" weight="-1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_ShareOfOtherComprehensiveIncomeOfAssociatesAndJointVenturesAccountedForUsingEquityMethodThatWillNotBeReclassifiedToProfitOrLossNetOfTax" xlink:label="ifrs-full_ShareOfOtherComprehensiveIncomeOfAssociatesAndJointVenturesAccountedForUsingEquityMethodThatWillNotBeReclassifiedToProfitOrLossNetOfTax" xlink:title="ifrs-full_ShareOfOtherComprehensiveIncomeOfAssociatesAndJointVenturesAccountedForUsingEquityMethodThatWillNotBeReclassifiedToProfitOrLossNetOfTax" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_OtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossNetOfTax" xlink:to="ifrs-full_ShareOfOtherComprehensiveIncomeOfAssociatesAndJointVenturesAccountedForUsingEquityMethodThatWillNotBeReclassifiedToProfitOrLossNetOfTax" xlink:title="Calculation : ifrs-full_OtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossNetOfTax to ifrs-full_ShareOfOtherComprehensiveIncomeOfAssociatesAndJointVenturesAccountedForUsingEquityMethodThatWillNotBeReclassifiedToProfitOrLossNetOfTax" order="2" weight="1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_ShareOfOtherComprehensiveIncomeOfAssociatesAndJointVenturesAccountedForUsingEquityMethodThatWillNotBeReclassifiedToProfitOrLossBeforeTax" xlink:label="ifrs-full_ShareOfOtherComprehensiveIncomeOfAssociatesAndJointVenturesAccountedForUsingEquityMethodThatWillNotBeReclassifiedToProfitOrLossBeforeTax" xlink:title="ifrs-full_ShareOfOtherComprehensiveIncomeOfAssociatesAndJointVenturesAccountedForUsingEquityMethodThatWillNotBeReclassifiedToProfitOrLossBeforeTax" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_ShareOfOtherComprehensiveIncomeOfAssociatesAndJointVenturesAccountedForUsingEquityMethodThatWillNotBeReclassifiedToProfitOrLossNetOfTax" xlink:to="ifrs-full_ShareOfOtherComprehensiveIncomeOfAssociatesAndJointVenturesAccountedForUsingEquityMethodThatWillNotBeReclassifiedToProfitOrLossBeforeTax" xlink:title="Calculation : ifrs-full_ShareOfOtherComprehensiveIncomeOfAssociatesAndJointVenturesAccountedForUsingEquityMethodThatWillNotBeReclassifiedToProfitOrLossNetOfTax to ifrs-full_ShareOfOtherComprehensiveIncomeOfAssociatesAndJointVenturesAccountedForUsingEquityMethodThatWillNotBeReclassifiedToProfitOrLossBeforeTax" order="0" weight="1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_IncomeTaxRelatingToShareOfOtherComprehensiveIncomeOfAssociatesAndJointVenturesAccountedForUsingEquityMethodThatWillNotBeReclassifiedToProfitOrLoss" xlink:label="ifrs-full_IncomeTaxRelatingToShareOfOtherComprehensiveIncomeOfAssociatesAndJointVenturesAccountedForUsingEquityMethodThatWillNotBeReclassifiedToProfitOrLoss" xlink:title="ifrs-full_IncomeTaxRelatingToShareOfOtherComprehensiveIncomeOfAssociatesAndJointVenturesAccountedForUsingEquityMethodThatWillNotBeReclassifiedToProfitOrLoss" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_ShareOfOtherComprehensiveIncomeOfAssociatesAndJointVenturesAccountedForUsingEquityMethodThatWillNotBeReclassifiedToProfitOrLossNetOfTax" xlink:to="ifrs-full_IncomeTaxRelatingToShareOfOtherComprehensiveIncomeOfAssociatesAndJointVenturesAccountedForUsingEquityMethodThatWillNotBeReclassifiedToProfitOrLoss" xlink:title="Calculation : ifrs-full_ShareOfOtherComprehensiveIncomeOfAssociatesAndJointVenturesAccountedForUsingEquityMethodThatWillNotBeReclassifiedToProfitOrLossNetOfTax to ifrs-full_IncomeTaxRelatingToShareOfOtherComprehensiveIncomeOfAssociatesAndJointVenturesAccountedForUsingEquityMethodThatWillNotBeReclassifiedToProfitOrLoss" order="1" weight="-1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_OtherComprehensiveIncomeNetOfTaxGainsLossesFromInvestmentsInEquityInstruments" xlink:label="ifrs-full_OtherComprehensiveIncomeNetOfTaxGainsLossesFromInvestmentsInEquityInstruments" xlink:title="ifrs-full_OtherComprehensiveIncomeNetOfTaxGainsLossesFromInvestmentsInEquityInstruments" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_OtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossNetOfTax" xlink:to="ifrs-full_OtherComprehensiveIncomeNetOfTaxGainsLossesFromInvestmentsInEquityInstruments" xlink:title="Calculation : ifrs-full_OtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossNetOfTax to ifrs-full_OtherComprehensiveIncomeNetOfTaxGainsLossesFromInvestmentsInEquityInstruments" order="3" weight="1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_OtherComprehensiveIncomeBeforeTaxGainsLossesFromInvestmentsInEquityInstruments" xlink:label="ifrs-full_OtherComprehensiveIncomeBeforeTaxGainsLossesFromInvestmentsInEquityInstruments" xlink:title="ifrs-full_OtherComprehensiveIncomeBeforeTaxGainsLossesFromInvestmentsInEquityInstruments" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_OtherComprehensiveIncomeNetOfTaxGainsLossesFromInvestmentsInEquityInstruments" xlink:to="ifrs-full_OtherComprehensiveIncomeBeforeTaxGainsLossesFromInvestmentsInEquityInstruments" xlink:title="Calculation : ifrs-full_OtherComprehensiveIncomeNetOfTaxGainsLossesFromInvestmentsInEquityInstruments to ifrs-full_OtherComprehensiveIncomeBeforeTaxGainsLossesFromInvestmentsInEquityInstruments" order="0" weight="1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_IncomeTaxRelatingToInvestmentsInEquityInstrumentsOfOtherComprehensiveIncome" xlink:label="ifrs-full_IncomeTaxRelatingToInvestmentsInEquityInstrumentsOfOtherComprehensiveIncome" xlink:title="ifrs-full_IncomeTaxRelatingToInvestmentsInEquityInstrumentsOfOtherComprehensiveIncome" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_OtherComprehensiveIncomeNetOfTaxGainsLossesFromInvestmentsInEquityInstruments" xlink:to="ifrs-full_IncomeTaxRelatingToInvestmentsInEquityInstrumentsOfOtherComprehensiveIncome" xlink:title="Calculation : ifrs-full_OtherComprehensiveIncomeNetOfTaxGainsLossesFromInvestmentsInEquityInstruments to ifrs-full_IncomeTaxRelatingToInvestmentsInEquityInstrumentsOfOtherComprehensiveIncome" order="1" weight="-1" use="optional" />
  </link:calculationLink>
  <link:calculationLink xlink:type="extended" xlink:role="http://www.kbc.com/xbrl/role/GeconsolideerdkasstroomoverzichtAB">
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_IncreaseDecreaseInCashAndCashEquivalents" xlink:label="ifrs-full_IncreaseDecreaseInCashAndCashEquivalents" xlink:title="ifrs-full_IncreaseDecreaseInCashAndCashEquivalents" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_CashFlowsFromUsedInOperatingActivities" xlink:label="ifrs-full_CashFlowsFromUsedInOperatingActivities" xlink:title="ifrs-full_CashFlowsFromUsedInOperatingActivities" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_IncreaseDecreaseInCashAndCashEquivalents" xlink:to="ifrs-full_CashFlowsFromUsedInOperatingActivities" xlink:title="Calculation : ifrs-full_IncreaseDecreaseInCashAndCashEquivalents to ifrs-full_CashFlowsFromUsedInOperatingActivities" order="0" weight="1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_CashFlowsFromUsedInOperationsBeforeChangesInWorkingCapital" xlink:label="ifrs-full_CashFlowsFromUsedInOperationsBeforeChangesInWorkingCapital" xlink:title="ifrs-full_CashFlowsFromUsedInOperationsBeforeChangesInWorkingCapital" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_CashFlowsFromUsedInOperatingActivities" xlink:to="ifrs-full_CashFlowsFromUsedInOperationsBeforeChangesInWorkingCapital" xlink:title="Calculation : ifrs-full_CashFlowsFromUsedInOperatingActivities to ifrs-full_CashFlowsFromUsedInOperationsBeforeChangesInWorkingCapital" order="0" weight="1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_ProfitLossBeforeTax" xlink:label="ifrs-full_ProfitLossBeforeTax" xlink:title="ifrs-full_ProfitLossBeforeTax" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_CashFlowsFromUsedInOperationsBeforeChangesInWorkingCapital" xlink:to="ifrs-full_ProfitLossBeforeTax" xlink:title="Calculation : ifrs-full_CashFlowsFromUsedInOperationsBeforeChangesInWorkingCapital to ifrs-full_ProfitLossBeforeTax" order="0" weight="1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="213800X3Q9LSAKRUWY91-2025-12-31.xsd#kbc_AdjustmentsForResultBeforeTaxFromDiscontinuedOperations" xlink:label="kbc_AdjustmentsForResultBeforeTaxFromDiscontinuedOperations" xlink:title="kbc_AdjustmentsForResultBeforeTaxFromDiscontinuedOperations" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_CashFlowsFromUsedInOperationsBeforeChangesInWorkingCapital" xlink:to="kbc_AdjustmentsForResultBeforeTaxFromDiscontinuedOperations" xlink:title="Calculation : ifrs-full_CashFlowsFromUsedInOperationsBeforeChangesInWorkingCapital to kbc_AdjustmentsForResultBeforeTaxFromDiscontinuedOperations" order="1" weight="-1" />
    <link:loc xlink:type="locator" xlink:href="213800X3Q9LSAKRUWY91-2025-12-31.xsd#kbc_AdjustmentsForDepreciationImpairmentAndAmortisationOfPropertyAndEquipmentIntangibleFixedAssetsInvestmentPropertyAndSecurities" xlink:label="kbc_AdjustmentsForDepreciationImpairmentAndAmortisationOfPropertyAndEquipmentIntangibleFixedAssetsInvestmentPropertyAndSecurities" xlink:title="kbc_AdjustmentsForDepreciationImpairmentAndAmortisationOfPropertyAndEquipmentIntangibleFixedAssetsInvestmentPropertyAndSecurities" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_CashFlowsFromUsedInOperationsBeforeChangesInWorkingCapital" xlink:to="kbc_AdjustmentsForDepreciationImpairmentAndAmortisationOfPropertyAndEquipmentIntangibleFixedAssetsInvestmentPropertyAndSecurities" xlink:title="Calculation : ifrs-full_CashFlowsFromUsedInOperationsBeforeChangesInWorkingCapital to kbc_AdjustmentsForDepreciationImpairmentAndAmortisationOfPropertyAndEquipmentIntangibleFixedAssetsInvestmentPropertyAndSecurities" order="2" weight="1" />
    <link:loc xlink:type="locator" xlink:href="213800X3Q9LSAKRUWY91-2025-12-31.xsd#kbc_AdjustmentsForProfitLossOnDisposalOfInvestments" xlink:label="kbc_AdjustmentsForProfitLossOnDisposalOfInvestments" xlink:title="kbc_AdjustmentsForProfitLossOnDisposalOfInvestments" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_CashFlowsFromUsedInOperationsBeforeChangesInWorkingCapital" xlink:to="kbc_AdjustmentsForProfitLossOnDisposalOfInvestments" xlink:title="Calculation : ifrs-full_CashFlowsFromUsedInOperationsBeforeChangesInWorkingCapital to kbc_AdjustmentsForProfitLossOnDisposalOfInvestments" order="3" weight="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_AdjustmentsForImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLossLoansAndAdvances" xlink:label="ifrs-full_AdjustmentsForImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLossLoansAndAdvances" xlink:title="ifrs-full_AdjustmentsForImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLossLoansAndAdvances" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_CashFlowsFromUsedInOperationsBeforeChangesInWorkingCapital" xlink:to="ifrs-full_AdjustmentsForImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLossLoansAndAdvances" xlink:title="Calculation : ifrs-full_CashFlowsFromUsedInOperationsBeforeChangesInWorkingCapital to ifrs-full_AdjustmentsForImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLossLoansAndAdvances" order="4" weight="1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="213800X3Q9LSAKRUWY91-2025-12-31.xsd#kbc_AdjustmentsForChangeInInsuranceContractLiabilitiesBeforeReinsurance" xlink:label="kbc_AdjustmentsForChangeInInsuranceContractLiabilitiesBeforeReinsurance" xlink:title="kbc_AdjustmentsForChangeInInsuranceContractLiabilitiesBeforeReinsurance" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_CashFlowsFromUsedInOperationsBeforeChangesInWorkingCapital" xlink:to="kbc_AdjustmentsForChangeInInsuranceContractLiabilitiesBeforeReinsurance" xlink:title="Calculation : ifrs-full_CashFlowsFromUsedInOperationsBeforeChangesInWorkingCapital to kbc_AdjustmentsForChangeInInsuranceContractLiabilitiesBeforeReinsurance" order="5" weight="1" />
    <link:loc xlink:type="locator" xlink:href="213800X3Q9LSAKRUWY91-2025-12-31.xsd#kbc_AdjustmentsForChangeInReinsuranceContractsHeld" xlink:label="kbc_AdjustmentsForChangeInReinsuranceContractsHeld" xlink:title="kbc_AdjustmentsForChangeInReinsuranceContractsHeld" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_CashFlowsFromUsedInOperationsBeforeChangesInWorkingCapital" xlink:to="kbc_AdjustmentsForChangeInReinsuranceContractsHeld" xlink:title="Calculation : ifrs-full_CashFlowsFromUsedInOperationsBeforeChangesInWorkingCapital to kbc_AdjustmentsForChangeInReinsuranceContractsHeld" order="6" weight="1" />
    <link:loc xlink:type="locator" xlink:href="213800X3Q9LSAKRUWY91-2025-12-31.xsd#kbc_AdjustmentsForChangeInOtherProvisions" xlink:label="kbc_AdjustmentsForChangeInOtherProvisions" xlink:title="kbc_AdjustmentsForChangeInOtherProvisions" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_CashFlowsFromUsedInOperationsBeforeChangesInWorkingCapital" xlink:to="kbc_AdjustmentsForChangeInOtherProvisions" xlink:title="Calculation : ifrs-full_CashFlowsFromUsedInOperationsBeforeChangesInWorkingCapital to kbc_AdjustmentsForChangeInOtherProvisions" order="7" weight="1" />
    <link:loc xlink:type="locator" xlink:href="213800X3Q9LSAKRUWY91-2025-12-31.xsd#kbc_AdjustmentsForOtherUnrealisedGainsLosses" xlink:label="kbc_AdjustmentsForOtherUnrealisedGainsLosses" xlink:title="kbc_AdjustmentsForOtherUnrealisedGainsLosses" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_CashFlowsFromUsedInOperationsBeforeChangesInWorkingCapital" xlink:to="kbc_AdjustmentsForOtherUnrealisedGainsLosses" xlink:title="Calculation : ifrs-full_CashFlowsFromUsedInOperationsBeforeChangesInWorkingCapital to kbc_AdjustmentsForOtherUnrealisedGainsLosses" order="8" weight="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_AdjustmentsForUndistributedProfitsOfInvestmentsAccountedForUsingEquityMethod" xlink:label="ifrs-full_AdjustmentsForUndistributedProfitsOfInvestmentsAccountedForUsingEquityMethod" xlink:title="ifrs-full_AdjustmentsForUndistributedProfitsOfInvestmentsAccountedForUsingEquityMethod" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_CashFlowsFromUsedInOperationsBeforeChangesInWorkingCapital" xlink:to="ifrs-full_AdjustmentsForUndistributedProfitsOfInvestmentsAccountedForUsingEquityMethod" xlink:title="Calculation : ifrs-full_CashFlowsFromUsedInOperationsBeforeChangesInWorkingCapital to ifrs-full_AdjustmentsForUndistributedProfitsOfInvestmentsAccountedForUsingEquityMethod" order="9" weight="-1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="213800X3Q9LSAKRUWY91-2025-12-31.xsd#kbc_ChangesInOperatingAssetsExcludingCashAndCashEquivalents" xlink:label="kbc_ChangesInOperatingAssetsExcludingCashAndCashEquivalents" xlink:title="kbc_ChangesInOperatingAssetsExcludingCashAndCashEquivalents" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_CashFlowsFromUsedInOperatingActivities" xlink:to="kbc_ChangesInOperatingAssetsExcludingCashAndCashEquivalents" xlink:title="Calculation : ifrs-full_CashFlowsFromUsedInOperatingActivities to kbc_ChangesInOperatingAssetsExcludingCashAndCashEquivalents" order="1" weight="1" />
    <link:loc xlink:type="locator" xlink:href="213800X3Q9LSAKRUWY91-2025-12-31.xsd#kbc_AdjustmentsForDecreaseIncreaseInFinancialAssetsAtAmortisedCostExcludingDebtSecurities" xlink:label="kbc_AdjustmentsForDecreaseIncreaseInFinancialAssetsAtAmortisedCostExcludingDebtSecurities" xlink:title="kbc_AdjustmentsForDecreaseIncreaseInFinancialAssetsAtAmortisedCostExcludingDebtSecurities" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="kbc_ChangesInOperatingAssetsExcludingCashAndCashEquivalents" xlink:to="kbc_AdjustmentsForDecreaseIncreaseInFinancialAssetsAtAmortisedCostExcludingDebtSecurities" xlink:title="Calculation : kbc_ChangesInOperatingAssetsExcludingCashAndCashEquivalents to kbc_AdjustmentsForDecreaseIncreaseInFinancialAssetsAtAmortisedCostExcludingDebtSecurities" order="0" weight="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_AdjustmentsForDecreaseIncreaseInFinancialAssetsMeasuredAtFairValueThroughOtherComprehensiveIncome" xlink:label="ifrs-full_AdjustmentsForDecreaseIncreaseInFinancialAssetsMeasuredAtFairValueThroughOtherComprehensiveIncome" xlink:title="ifrs-full_AdjustmentsForDecreaseIncreaseInFinancialAssetsMeasuredAtFairValueThroughOtherComprehensiveIncome" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="kbc_ChangesInOperatingAssetsExcludingCashAndCashEquivalents" xlink:to="ifrs-full_AdjustmentsForDecreaseIncreaseInFinancialAssetsMeasuredAtFairValueThroughOtherComprehensiveIncome" xlink:title="Calculation : kbc_ChangesInOperatingAssetsExcludingCashAndCashEquivalents to ifrs-full_AdjustmentsForDecreaseIncreaseInFinancialAssetsMeasuredAtFairValueThroughOtherComprehensiveIncome" order="1" weight="1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_AdjustmentsForDecreaseIncreaseInFinancialAssetsMeasuredAtFairValueThroughProfitOrLoss" xlink:label="ifrs-full_AdjustmentsForDecreaseIncreaseInFinancialAssetsMeasuredAtFairValueThroughProfitOrLoss" xlink:title="ifrs-full_AdjustmentsForDecreaseIncreaseInFinancialAssetsMeasuredAtFairValueThroughProfitOrLoss" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="kbc_ChangesInOperatingAssetsExcludingCashAndCashEquivalents" xlink:to="ifrs-full_AdjustmentsForDecreaseIncreaseInFinancialAssetsMeasuredAtFairValueThroughProfitOrLoss" xlink:title="Calculation : kbc_ChangesInOperatingAssetsExcludingCashAndCashEquivalents to ifrs-full_AdjustmentsForDecreaseIncreaseInFinancialAssetsMeasuredAtFairValueThroughProfitOrLoss" order="2" weight="1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_AdjustmentsForDecreaseIncreaseInDerivativeFinancialAssets" xlink:label="ifrs-full_AdjustmentsForDecreaseIncreaseInDerivativeFinancialAssets" xlink:title="ifrs-full_AdjustmentsForDecreaseIncreaseInDerivativeFinancialAssets" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="kbc_ChangesInOperatingAssetsExcludingCashAndCashEquivalents" xlink:to="ifrs-full_AdjustmentsForDecreaseIncreaseInDerivativeFinancialAssets" xlink:title="Calculation : kbc_ChangesInOperatingAssetsExcludingCashAndCashEquivalents to ifrs-full_AdjustmentsForDecreaseIncreaseInDerivativeFinancialAssets" order="3" weight="1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="213800X3Q9LSAKRUWY91-2025-12-31.xsd#kbc_AdjustmentsForDecreaseIncreaseInReinsuranceContractAssets" xlink:label="kbc_AdjustmentsForDecreaseIncreaseInReinsuranceContractAssets" xlink:title="kbc_AdjustmentsForDecreaseIncreaseInReinsuranceContractAssets" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="kbc_ChangesInOperatingAssetsExcludingCashAndCashEquivalents" xlink:to="kbc_AdjustmentsForDecreaseIncreaseInReinsuranceContractAssets" xlink:title="Calculation : kbc_ChangesInOperatingAssetsExcludingCashAndCashEquivalents to kbc_AdjustmentsForDecreaseIncreaseInReinsuranceContractAssets" order="4" weight="1" />
    <link:loc xlink:type="locator" xlink:href="213800X3Q9LSAKRUWY91-2025-12-31.xsd#kbc_AdjustmentsForDecreaseIncreaseInOperatingAssetsAssociatedWithDisposalGroupsAndOtherAssets" xlink:label="kbc_AdjustmentsForDecreaseIncreaseInOperatingAssetsAssociatedWithDisposalGroupsAndOtherAssets" xlink:title="kbc_AdjustmentsForDecreaseIncreaseInOperatingAssetsAssociatedWithDisposalGroupsAndOtherAssets" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="kbc_ChangesInOperatingAssetsExcludingCashAndCashEquivalents" xlink:to="kbc_AdjustmentsForDecreaseIncreaseInOperatingAssetsAssociatedWithDisposalGroupsAndOtherAssets" xlink:title="Calculation : kbc_ChangesInOperatingAssetsExcludingCashAndCashEquivalents to kbc_AdjustmentsForDecreaseIncreaseInOperatingAssetsAssociatedWithDisposalGroupsAndOtherAssets" order="5" weight="1" />
    <link:loc xlink:type="locator" xlink:href="213800X3Q9LSAKRUWY91-2025-12-31.xsd#kbc_IncreaseDecreaseInOperatingLiabilitiesExcludingCashAndCashEquivalents" xlink:label="kbc_IncreaseDecreaseInOperatingLiabilitiesExcludingCashAndCashEquivalents" xlink:title="kbc_IncreaseDecreaseInOperatingLiabilitiesExcludingCashAndCashEquivalents" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_CashFlowsFromUsedInOperatingActivities" xlink:to="kbc_IncreaseDecreaseInOperatingLiabilitiesExcludingCashAndCashEquivalents" xlink:title="Calculation : ifrs-full_CashFlowsFromUsedInOperatingActivities to kbc_IncreaseDecreaseInOperatingLiabilitiesExcludingCashAndCashEquivalents" order="2" weight="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_AdjustmentsForIncreaseDecreaseInFinancialLiabilitiesMeasuredAtAmortisedCost" xlink:label="ifrs-full_AdjustmentsForIncreaseDecreaseInFinancialLiabilitiesMeasuredAtAmortisedCost" xlink:title="ifrs-full_AdjustmentsForIncreaseDecreaseInFinancialLiabilitiesMeasuredAtAmortisedCost" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="kbc_IncreaseDecreaseInOperatingLiabilitiesExcludingCashAndCashEquivalents" xlink:to="ifrs-full_AdjustmentsForIncreaseDecreaseInFinancialLiabilitiesMeasuredAtAmortisedCost" xlink:title="Calculation : kbc_IncreaseDecreaseInOperatingLiabilitiesExcludingCashAndCashEquivalents to ifrs-full_AdjustmentsForIncreaseDecreaseInFinancialLiabilitiesMeasuredAtAmortisedCost" order="0" weight="1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_AdjustmentsForIncreaseDecreaseInFinancialLiabilitiesMeasuredAtFairValueThroughProfitOrLoss" xlink:label="ifrs-full_AdjustmentsForIncreaseDecreaseInFinancialLiabilitiesMeasuredAtFairValueThroughProfitOrLoss" xlink:title="ifrs-full_AdjustmentsForIncreaseDecreaseInFinancialLiabilitiesMeasuredAtFairValueThroughProfitOrLoss" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="kbc_IncreaseDecreaseInOperatingLiabilitiesExcludingCashAndCashEquivalents" xlink:to="ifrs-full_AdjustmentsForIncreaseDecreaseInFinancialLiabilitiesMeasuredAtFairValueThroughProfitOrLoss" xlink:title="Calculation : kbc_IncreaseDecreaseInOperatingLiabilitiesExcludingCashAndCashEquivalents to ifrs-full_AdjustmentsForIncreaseDecreaseInFinancialLiabilitiesMeasuredAtFairValueThroughProfitOrLoss" order="1" weight="1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_AdjustmentsForIncreaseDecreaseInDerivativeFinancialLiabilities" xlink:label="ifrs-full_AdjustmentsForIncreaseDecreaseInDerivativeFinancialLiabilities" xlink:title="ifrs-full_AdjustmentsForIncreaseDecreaseInDerivativeFinancialLiabilities" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="kbc_IncreaseDecreaseInOperatingLiabilitiesExcludingCashAndCashEquivalents" xlink:to="ifrs-full_AdjustmentsForIncreaseDecreaseInDerivativeFinancialLiabilities" xlink:title="Calculation : kbc_IncreaseDecreaseInOperatingLiabilitiesExcludingCashAndCashEquivalents to ifrs-full_AdjustmentsForIncreaseDecreaseInDerivativeFinancialLiabilities" order="2" weight="1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="213800X3Q9LSAKRUWY91-2025-12-31.xsd#kbc_AdjustmentsForIncreaseDecreaseInInsuranceContractLiabilities" xlink:label="kbc_AdjustmentsForIncreaseDecreaseInInsuranceContractLiabilities" xlink:title="kbc_AdjustmentsForIncreaseDecreaseInInsuranceContractLiabilities" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="kbc_IncreaseDecreaseInOperatingLiabilitiesExcludingCashAndCashEquivalents" xlink:to="kbc_AdjustmentsForIncreaseDecreaseInInsuranceContractLiabilities" xlink:title="Calculation : kbc_IncreaseDecreaseInOperatingLiabilitiesExcludingCashAndCashEquivalents to kbc_AdjustmentsForIncreaseDecreaseInInsuranceContractLiabilities" order="3" weight="1" />
    <link:loc xlink:type="locator" xlink:href="213800X3Q9LSAKRUWY91-2025-12-31.xsd#kbc_AdjustmentsForIncreaseDecreaseInOperatingLiabilitiesAssociatedWithDisposalGroupsAndOtherLiabilities" xlink:label="kbc_AdjustmentsForIncreaseDecreaseInOperatingLiabilitiesAssociatedWithDisposalGroupsAndOtherLiabilities" xlink:title="kbc_AdjustmentsForIncreaseDecreaseInOperatingLiabilitiesAssociatedWithDisposalGroupsAndOtherLiabilities" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="kbc_IncreaseDecreaseInOperatingLiabilitiesExcludingCashAndCashEquivalents" xlink:to="kbc_AdjustmentsForIncreaseDecreaseInOperatingLiabilitiesAssociatedWithDisposalGroupsAndOtherLiabilities" xlink:title="Calculation : kbc_IncreaseDecreaseInOperatingLiabilitiesExcludingCashAndCashEquivalents to kbc_AdjustmentsForIncreaseDecreaseInOperatingLiabilitiesAssociatedWithDisposalGroupsAndOtherLiabilities" order="4" weight="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_IncomeTaxesPaidRefundClassifiedAsOperatingActivities" xlink:label="ifrs-full_IncomeTaxesPaidRefundClassifiedAsOperatingActivities" xlink:title="ifrs-full_IncomeTaxesPaidRefundClassifiedAsOperatingActivities" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_CashFlowsFromUsedInOperatingActivities" xlink:to="ifrs-full_IncomeTaxesPaidRefundClassifiedAsOperatingActivities" xlink:title="Calculation : ifrs-full_CashFlowsFromUsedInOperatingActivities to ifrs-full_IncomeTaxesPaidRefundClassifiedAsOperatingActivities" order="3" weight="-1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_CashFlowsFromUsedInInvestingActivities" xlink:label="ifrs-full_CashFlowsFromUsedInInvestingActivities" xlink:title="ifrs-full_CashFlowsFromUsedInInvestingActivities" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_IncreaseDecreaseInCashAndCashEquivalents" xlink:to="ifrs-full_CashFlowsFromUsedInInvestingActivities" xlink:title="Calculation : ifrs-full_IncreaseDecreaseInCashAndCashEquivalents to ifrs-full_CashFlowsFromUsedInInvestingActivities" order="1" weight="1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_PurchaseOfFinancialInstrumentsClassifiedAsInvestingActivities" xlink:label="ifrs-full_PurchaseOfFinancialInstrumentsClassifiedAsInvestingActivities" xlink:title="ifrs-full_PurchaseOfFinancialInstrumentsClassifiedAsInvestingActivities" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_CashFlowsFromUsedInInvestingActivities" xlink:to="ifrs-full_PurchaseOfFinancialInstrumentsClassifiedAsInvestingActivities" xlink:title="Calculation : ifrs-full_CashFlowsFromUsedInInvestingActivities to ifrs-full_PurchaseOfFinancialInstrumentsClassifiedAsInvestingActivities" order="0" weight="-1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_ProceedsFromSalesOrMaturityOfFinancialInstrumentsClassifiedAsInvestingActivities" xlink:label="ifrs-full_ProceedsFromSalesOrMaturityOfFinancialInstrumentsClassifiedAsInvestingActivities" xlink:title="ifrs-full_ProceedsFromSalesOrMaturityOfFinancialInstrumentsClassifiedAsInvestingActivities" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_CashFlowsFromUsedInInvestingActivities" xlink:to="ifrs-full_ProceedsFromSalesOrMaturityOfFinancialInstrumentsClassifiedAsInvestingActivities" xlink:title="Calculation : ifrs-full_CashFlowsFromUsedInInvestingActivities to ifrs-full_ProceedsFromSalesOrMaturityOfFinancialInstrumentsClassifiedAsInvestingActivities" order="1" weight="1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_CashFlowsFromLosingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities" xlink:label="ifrs-full_CashFlowsFromLosingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities" xlink:title="ifrs-full_CashFlowsFromLosingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_CashFlowsFromUsedInInvestingActivities" xlink:to="ifrs-full_CashFlowsFromLosingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities" xlink:title="Calculation : ifrs-full_CashFlowsFromUsedInInvestingActivities to ifrs-full_CashFlowsFromLosingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities" order="2" weight="1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="213800X3Q9LSAKRUWY91-2025-12-31.xsd#kbc_PurchaseOfInterestsProceedsFromSalesOfInvestmentsAccountedForUsingEquityMethod" xlink:label="kbc_PurchaseOfInterestsProceedsFromSalesOfInvestmentsAccountedForUsingEquityMethod" xlink:title="kbc_PurchaseOfInterestsProceedsFromSalesOfInvestmentsAccountedForUsingEquityMethod" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_CashFlowsFromUsedInInvestingActivities" xlink:to="kbc_PurchaseOfInterestsProceedsFromSalesOfInvestmentsAccountedForUsingEquityMethod" xlink:title="Calculation : ifrs-full_CashFlowsFromUsedInInvestingActivities to kbc_PurchaseOfInterestsProceedsFromSalesOfInvestmentsAccountedForUsingEquityMethod" order="3" weight="-1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_ProceedsFromSalesOfInvestmentsAccountedForUsingEquityMethod" xlink:label="ifrs-full_ProceedsFromSalesOfInvestmentsAccountedForUsingEquityMethod" xlink:title="ifrs-full_ProceedsFromSalesOfInvestmentsAccountedForUsingEquityMethod" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_CashFlowsFromUsedInInvestingActivities" xlink:to="ifrs-full_ProceedsFromSalesOfInvestmentsAccountedForUsingEquityMethod" xlink:title="Calculation : ifrs-full_CashFlowsFromUsedInInvestingActivities to ifrs-full_ProceedsFromSalesOfInvestmentsAccountedForUsingEquityMethod" order="4" weight="1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_DividendsReceivedClassifiedAsInvestingActivities" xlink:label="ifrs-full_DividendsReceivedClassifiedAsInvestingActivities" xlink:title="ifrs-full_DividendsReceivedClassifiedAsInvestingActivities" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_CashFlowsFromUsedInInvestingActivities" xlink:to="ifrs-full_DividendsReceivedClassifiedAsInvestingActivities" xlink:title="Calculation : ifrs-full_CashFlowsFromUsedInInvestingActivities to ifrs-full_DividendsReceivedClassifiedAsInvestingActivities" order="5" weight="1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_PurchaseOfInvestmentProperty" xlink:label="ifrs-full_PurchaseOfInvestmentProperty" xlink:title="ifrs-full_PurchaseOfInvestmentProperty" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_CashFlowsFromUsedInInvestingActivities" xlink:to="ifrs-full_PurchaseOfInvestmentProperty" xlink:title="Calculation : ifrs-full_CashFlowsFromUsedInInvestingActivities to ifrs-full_PurchaseOfInvestmentProperty" order="6" weight="-1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_ProceedsFromSalesOfInvestmentProperty" xlink:label="ifrs-full_ProceedsFromSalesOfInvestmentProperty" xlink:title="ifrs-full_ProceedsFromSalesOfInvestmentProperty" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_CashFlowsFromUsedInInvestingActivities" xlink:to="ifrs-full_ProceedsFromSalesOfInvestmentProperty" xlink:title="Calculation : ifrs-full_CashFlowsFromUsedInInvestingActivities to ifrs-full_ProceedsFromSalesOfInvestmentProperty" order="7" weight="1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_PurchaseOfIntangibleAssetsClassifiedAsInvestingActivities" xlink:label="ifrs-full_PurchaseOfIntangibleAssetsClassifiedAsInvestingActivities" xlink:title="ifrs-full_PurchaseOfIntangibleAssetsClassifiedAsInvestingActivities" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_CashFlowsFromUsedInInvestingActivities" xlink:to="ifrs-full_PurchaseOfIntangibleAssetsClassifiedAsInvestingActivities" xlink:title="Calculation : ifrs-full_CashFlowsFromUsedInInvestingActivities to ifrs-full_PurchaseOfIntangibleAssetsClassifiedAsInvestingActivities" order="8" weight="-1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_ProceedsFromSalesOfIntangibleAssetsClassifiedAsInvestingActivities" xlink:label="ifrs-full_ProceedsFromSalesOfIntangibleAssetsClassifiedAsInvestingActivities" xlink:title="ifrs-full_ProceedsFromSalesOfIntangibleAssetsClassifiedAsInvestingActivities" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_CashFlowsFromUsedInInvestingActivities" xlink:to="ifrs-full_ProceedsFromSalesOfIntangibleAssetsClassifiedAsInvestingActivities" xlink:title="Calculation : ifrs-full_CashFlowsFromUsedInInvestingActivities to ifrs-full_ProceedsFromSalesOfIntangibleAssetsClassifiedAsInvestingActivities" order="9" weight="1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_PurchaseOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities" xlink:label="ifrs-full_PurchaseOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities" xlink:title="ifrs-full_PurchaseOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_CashFlowsFromUsedInInvestingActivities" xlink:to="ifrs-full_PurchaseOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities" xlink:title="Calculation : ifrs-full_CashFlowsFromUsedInInvestingActivities to ifrs-full_PurchaseOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities" order="10" weight="-1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_ProceedsFromSalesOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities" xlink:label="ifrs-full_ProceedsFromSalesOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities" xlink:title="ifrs-full_ProceedsFromSalesOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_CashFlowsFromUsedInInvestingActivities" xlink:to="ifrs-full_ProceedsFromSalesOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities" xlink:title="Calculation : ifrs-full_CashFlowsFromUsedInInvestingActivities to ifrs-full_ProceedsFromSalesOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities" order="11" weight="1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="213800X3Q9LSAKRUWY91-2025-12-31.xsd#kbc_AcquisitionOfSubsidiaryOrBusinessUnitNetOfCashAcquiredClassifiedAsInvestingActivities" xlink:label="kbc_AcquisitionOfSubsidiaryOrBusinessUnitNetOfCashAcquiredClassifiedAsInvestingActivities" xlink:title="kbc_AcquisitionOfSubsidiaryOrBusinessUnitNetOfCashAcquiredClassifiedAsInvestingActivities" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_CashFlowsFromUsedInInvestingActivities" xlink:to="kbc_AcquisitionOfSubsidiaryOrBusinessUnitNetOfCashAcquiredClassifiedAsInvestingActivities" xlink:title="Calculation : ifrs-full_CashFlowsFromUsedInInvestingActivities to kbc_AcquisitionOfSubsidiaryOrBusinessUnitNetOfCashAcquiredClassifiedAsInvestingActivities" order="12" weight="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_CashFlowsFromUsedInFinancingActivities" xlink:label="ifrs-full_CashFlowsFromUsedInFinancingActivities" xlink:title="ifrs-full_CashFlowsFromUsedInFinancingActivities" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_IncreaseDecreaseInCashAndCashEquivalents" xlink:to="ifrs-full_CashFlowsFromUsedInFinancingActivities" xlink:title="Calculation : ifrs-full_IncreaseDecreaseInCashAndCashEquivalents to ifrs-full_CashFlowsFromUsedInFinancingActivities" order="2" weight="1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_PaymentsToAcquireOrRedeemEntitysShares" xlink:label="ifrs-full_PaymentsToAcquireOrRedeemEntitysShares" xlink:title="ifrs-full_PaymentsToAcquireOrRedeemEntitysShares" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_CashFlowsFromUsedInFinancingActivities" xlink:to="ifrs-full_PaymentsToAcquireOrRedeemEntitysShares" xlink:title="Calculation : ifrs-full_CashFlowsFromUsedInFinancingActivities to ifrs-full_PaymentsToAcquireOrRedeemEntitysShares" order="0" weight="-1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_ProceedsFromIssueOfBondsNotesAndDebentures" xlink:label="ifrs-full_ProceedsFromIssueOfBondsNotesAndDebentures" xlink:title="ifrs-full_ProceedsFromIssueOfBondsNotesAndDebentures" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_CashFlowsFromUsedInFinancingActivities" xlink:to="ifrs-full_ProceedsFromIssueOfBondsNotesAndDebentures" xlink:title="Calculation : ifrs-full_CashFlowsFromUsedInFinancingActivities to ifrs-full_ProceedsFromIssueOfBondsNotesAndDebentures" order="1" weight="1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_RepaymentsOfBondsNotesAndDebentures" xlink:label="ifrs-full_RepaymentsOfBondsNotesAndDebentures" xlink:title="ifrs-full_RepaymentsOfBondsNotesAndDebentures" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_CashFlowsFromUsedInFinancingActivities" xlink:to="ifrs-full_RepaymentsOfBondsNotesAndDebentures" xlink:title="Calculation : ifrs-full_CashFlowsFromUsedInFinancingActivities to ifrs-full_RepaymentsOfBondsNotesAndDebentures" order="2" weight="-1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_ProceedsFromIssueOfSubordinatedLiabilities" xlink:label="ifrs-full_ProceedsFromIssueOfSubordinatedLiabilities" xlink:title="ifrs-full_ProceedsFromIssueOfSubordinatedLiabilities" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_CashFlowsFromUsedInFinancingActivities" xlink:to="ifrs-full_ProceedsFromIssueOfSubordinatedLiabilities" xlink:title="Calculation : ifrs-full_CashFlowsFromUsedInFinancingActivities to ifrs-full_ProceedsFromIssueOfSubordinatedLiabilities" order="3" weight="1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_RepaymentsOfSubordinatedLiabilities" xlink:label="ifrs-full_RepaymentsOfSubordinatedLiabilities" xlink:title="ifrs-full_RepaymentsOfSubordinatedLiabilities" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_CashFlowsFromUsedInFinancingActivities" xlink:to="ifrs-full_RepaymentsOfSubordinatedLiabilities" xlink:title="Calculation : ifrs-full_CashFlowsFromUsedInFinancingActivities to ifrs-full_RepaymentsOfSubordinatedLiabilities" order="4" weight="-1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_ProceedsFromIssuingShares" xlink:label="ifrs-full_ProceedsFromIssuingShares" xlink:title="ifrs-full_ProceedsFromIssuingShares" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_CashFlowsFromUsedInFinancingActivities" xlink:to="ifrs-full_ProceedsFromIssuingShares" xlink:title="Calculation : ifrs-full_CashFlowsFromUsedInFinancingActivities to ifrs-full_ProceedsFromIssuingShares" order="5" weight="1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="213800X3Q9LSAKRUWY91-2025-12-31.xsd#kbc_ProceedsFromIssueOfAdditionalTier1Instruments" xlink:label="kbc_ProceedsFromIssueOfAdditionalTier1Instruments" xlink:title="kbc_ProceedsFromIssueOfAdditionalTier1Instruments" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_CashFlowsFromUsedInFinancingActivities" xlink:to="kbc_ProceedsFromIssueOfAdditionalTier1Instruments" xlink:title="Calculation : ifrs-full_CashFlowsFromUsedInFinancingActivities to kbc_ProceedsFromIssueOfAdditionalTier1Instruments" order="6" weight="1" />
    <link:loc xlink:type="locator" xlink:href="213800X3Q9LSAKRUWY91-2025-12-31.xsd#kbc_RepaymentsOfAdditionalTier1Instruments" xlink:label="kbc_RepaymentsOfAdditionalTier1Instruments" xlink:title="kbc_RepaymentsOfAdditionalTier1Instruments" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_CashFlowsFromUsedInFinancingActivities" xlink:to="kbc_RepaymentsOfAdditionalTier1Instruments" xlink:title="Calculation : ifrs-full_CashFlowsFromUsedInFinancingActivities to kbc_RepaymentsOfAdditionalTier1Instruments" order="7" weight="-1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_DividendsPaidClassifiedAsFinancingActivities" xlink:label="ifrs-full_DividendsPaidClassifiedAsFinancingActivities" xlink:title="ifrs-full_DividendsPaidClassifiedAsFinancingActivities" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_CashFlowsFromUsedInFinancingActivities" xlink:to="ifrs-full_DividendsPaidClassifiedAsFinancingActivities" xlink:title="Calculation : ifrs-full_CashFlowsFromUsedInFinancingActivities to ifrs-full_DividendsPaidClassifiedAsFinancingActivities" order="8" weight="-1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="213800X3Q9LSAKRUWY91-2025-12-31.xsd#kbc_CouponOnAdditionalTier1InstrumentsClassifiedAsFinancingActivities" xlink:label="kbc_CouponOnAdditionalTier1InstrumentsClassifiedAsFinancingActivities" xlink:title="kbc_CouponOnAdditionalTier1InstrumentsClassifiedAsFinancingActivities" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_CashFlowsFromUsedInFinancingActivities" xlink:to="kbc_CouponOnAdditionalTier1InstrumentsClassifiedAsFinancingActivities" xlink:title="Calculation : ifrs-full_CashFlowsFromUsedInFinancingActivities to kbc_CouponOnAdditionalTier1InstrumentsClassifiedAsFinancingActivities" order="9" weight="-1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_CashAndCashEquivalents" xlink:label="ifrs-full_CashAndCashEquivalents" xlink:title="ifrs-full_CashAndCashEquivalents" />
    <link:loc xlink:type="locator" xlink:href="213800X3Q9LSAKRUWY91-2025-12-31.xsd#kbc_CashWithCentralBanks" xlink:label="kbc_CashWithCentralBanks" xlink:title="kbc_CashWithCentralBanks" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_CashAndCashEquivalents" xlink:to="kbc_CashWithCentralBanks" xlink:title="Calculation : ifrs-full_CashAndCashEquivalents to kbc_CashWithCentralBanks" order="0" weight="1" />
    <link:loc xlink:type="locator" xlink:href="213800X3Q9LSAKRUWY91-2025-12-31.xsd#kbc_CashBalancesWithCentralBanks" xlink:label="kbc_CashBalancesWithCentralBanks" xlink:title="kbc_CashBalancesWithCentralBanks" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_CashAndCashEquivalents" xlink:to="kbc_CashBalancesWithCentralBanks" xlink:title="Calculation : ifrs-full_CashAndCashEquivalents to kbc_CashBalancesWithCentralBanks" order="1" weight="1" />
    <link:loc xlink:type="locator" xlink:href="213800X3Q9LSAKRUWY91-2025-12-31.xsd#kbc_DemandDepositsWithCreditInstitutions" xlink:label="kbc_DemandDepositsWithCreditInstitutions" xlink:title="kbc_DemandDepositsWithCreditInstitutions" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_CashAndCashEquivalents" xlink:to="kbc_DemandDepositsWithCreditInstitutions" xlink:title="Calculation : ifrs-full_CashAndCashEquivalents to kbc_DemandDepositsWithCreditInstitutions" order="2" weight="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_LoansAndAdvancesToBanks" xlink:label="ifrs-full_LoansAndAdvancesToBanks" xlink:title="ifrs-full_LoansAndAdvancesToBanks" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_CashAndCashEquivalents" xlink:to="ifrs-full_LoansAndAdvancesToBanks" xlink:title="Calculation : ifrs-full_CashAndCashEquivalents to ifrs-full_LoansAndAdvancesToBanks" order="3" weight="1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_ReverseRepurchaseAgreementsAndCashCollateralOnSecuritiesBorrowed" xlink:label="ifrs-full_ReverseRepurchaseAgreementsAndCashCollateralOnSecuritiesBorrowed" xlink:title="ifrs-full_ReverseRepurchaseAgreementsAndCashCollateralOnSecuritiesBorrowed" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_CashAndCashEquivalents" xlink:to="ifrs-full_ReverseRepurchaseAgreementsAndCashCollateralOnSecuritiesBorrowed" xlink:title="Calculation : ifrs-full_CashAndCashEquivalents to ifrs-full_ReverseRepurchaseAgreementsAndCashCollateralOnSecuritiesBorrowed" order="4" weight="1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_DepositsFromBanks" xlink:label="ifrs-full_DepositsFromBanks" xlink:title="ifrs-full_DepositsFromBanks" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_CashAndCashEquivalents" xlink:to="ifrs-full_DepositsFromBanks" xlink:title="Calculation : ifrs-full_CashAndCashEquivalents to ifrs-full_DepositsFromBanks" order="5" weight="-1" use="optional" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_CashAndCashEquivalentsClassifiedAsPartOfDisposalGroupHeldForSale" xlink:label="ifrs-full_CashAndCashEquivalentsClassifiedAsPartOfDisposalGroupHeldForSale" xlink:title="ifrs-full_CashAndCashEquivalentsClassifiedAsPartOfDisposalGroupHeldForSale" />
    <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ifrs-full_CashAndCashEquivalents" xlink:to="ifrs-full_CashAndCashEquivalentsClassifiedAsPartOfDisposalGroupHeldForSale" xlink:title="Calculation : ifrs-full_CashAndCashEquivalents to ifrs-full_CashAndCashEquivalentsClassifiedAsPartOfDisposalGroupHeldForSale" order="6" weight="1" use="optional" />
  </link:calculationLink>
  <link:calculationLink xlink:type="extended" xlink:role="http://www.kbc.com/xbrl/role/GeconsolideerdegerealiseerdeennietgerealiseerderesultatenParentheticals" />
  <link:calculationLink xlink:type="extended" xlink:role="http://www.kbc.com/xbrl/role/GeconsolideerdoverzichtvanwijzigingeninheteigenvermogenParentheticals" />
  <link:calculationLink xlink:type="extended" xlink:role="http://www.kbc.com/xbrl/role/GeconsolideerdoverzichtvanwijzigingeninheteigenvermogenParentheticals2" />
  <link:calculationLink xlink:type="extended" xlink:role="http://www.kbc.com/xbrl/role/GeconsolideerdkasstroomoverzichtParentheticals" />
  <link:calculationLink xlink:type="extended" xlink:role="http://www.kbc.com/xbrl/role/Toelichtingopdegeconsolideerdejaarrekening" />
</link:linkbase>