
Key Audit Matters How the key audit matter was addressed in the audit
Tangible fixed assets
Securing supply and facilitating the integration of
sustainable energy sources into the high-voltage
grid require substantial investments and flexible
access to (equity) funding. TenneT expects to
increase its annual investment volume to at least
EUR 6 billion by 2025 in onshore and offshore grid
connections.
We have tested the internal control environment related to tangible fixed assets through testing
of operating effectiveness of relevant controls, including controls related to investment approval
and the financial closing of assets under construction as well as the periodic determination of
the useful life of tangible fixed assets. In addition, we have tested relevant controls for design
and implementation around the liquidity forecast safeguarding TenneT’s ability to finance
investments.
At yearend, we have performed test of details on the additions and other movements. We
obtained and discussed internal management reports about progress of the key assets under
construction. We evaluated management’s useful life estimations for reasonableness based on
economic, regulatory and asset health data.
Also, we have evaluated management’s impairment trigger analyses noting that such a trigger
was identified for the TSO NL cash generating unit. As a consequence, TenneT performed an
impairment test for these assets as at December 31, 2021. The impairment test comprised of
assessing the recoverable amount by means of a value-in-use calculation using a discounted
cash flow model. The resulting recoverable amount is higher than the carrying amount.
Therefore, no impairment is recorded in the financial statements 2021. The main assumptions
used in the calculation of the recoverable amount are disclosed in the financial statements Note 8.
Furthermore, we evaluated the approriateness of the disclosure of the accounting policy and
estimation uncertainty of the TSO NL impairment test.
Observation
No reportable matters were identified as a result of our procedures.
We have included this as a key audit matter
because of:
• the financial significance of the tangible fixed
assets and capital expenditures; and
• the risks associated with large investment
projects, complexity in procurement,
construction and timely completion; and
• the professional judgment required in
estimating the useful lives of assets and in
identifying any potential impairment (triggers).
Provision for decommissioning of (offshore) assets
Moving towards a renewable future involves
significant investments in (offshore) assets, that are
to be decommissioned over the next 20 to
40years, thus requiring recognition of decommis-
sion provisions. The corresponding provisions are
based on estimates of costs, timing of decommis-
sioning, discount rates and inflation.
We have obtained management’s position papers on the cost assumptions and alignment of
the methodology across The Netherlands and Germany. Our audit procedures include testing
of design and implementation of relevant controls around the periodical assessment of these
assumptions and the evaluation of the financial model used to calculate the provision.
Our substantive audit procedures further include an assessment of the reasonability of the key
assumptions (including involvement of a specialist with regards to the cost assumptions)
through comparison with observable market data and procedures to address the completeness
of the provision.
Furthermore, we evaluated the appropriateness of the disclosure of the accounting policy and
estimation uncertainty of these provisions.
Observation
Our procedures did not identify material observations and we considered management’s key
assumptions, to be within the reasonable range of our own expectations.
We have included this as a key audit matter
because of:
• the significance of the provision and
additions for the year triggered by the start of
construction of new (offshore) assets; and
• the uncertainty involved in measuring the
provision and sensitivity to changes in key
assumptions, including the cost base, the
inflation rate and the discount rate.
Accrual for in-feed management expenses
Due to a larger share of renewable energy
production in Germany, supply of energy may
sometimes exceed demand. In such instances,
TenneT initiates redispatch measures to maintain
the energy balance on its grids at 50 Hertz. If there
is no redispatch possibility on the transmission
grid, TenneT will direct distribution system
operators to curtail producers of (renewable)
electricity to secure system stability. These
producers are then entitled to reimbursement for
their lost in-feed.
We obtained an understanding of the external factors and market processes that drive the
estimation uncertainty, including an evaluation on the correlation between average wind
developments and in-feed management expenses for 2021 and the previous periods.
We have tested the internal control environment related to the in-feed management expenses
by testing design and implementation of relevant controls. This includes an assessment of the
methodology applied by TenneT to estimate the accrual at reporting date.
We performed the following combination of substantive testing procedures:
• we tested quantity (GWh) and pricing data of the accrual estimation with underlying
contract and counterparty quantity data.
• we performed back-testing of historical estimates, primarily aimed to test quantity
estimations (GWh) with the use of observable market data, as well as the pricing
estimations of the transactions based on contracts, and
• we evaluated underlying drivers of historical estimate updates to the current period
estimates.
Observation
Our procedures did not identify material observations and we considered management’s key
assumptions (quantity and price) to be within the reasonable range of our expectations.
We have included this as a key audit matter
because the accrual for in-feed management is
significant and subject to estimation uncertainty in
assessing variable renewable energy production,
where TenneT is dependent on information from
other market participants.
Moreover, final settlement of in-feed management
measures may take up to six years to resolve due
to regulatory terms.
Integrated Annual Report 2021 - TenneT Holding B.V.
At a glance
2021
Our performance
in 2021
Letter from
the Board
Supervisory
Board Report
Financial
statements
About
TenneT
Governance
and risk
management
Other
information
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