Testing borrowing cost capitalization means first confirming each asset against which interest was capitalised actually meets the definition of a qualifying asset — one that necessarily takes a substantial period to get ready for its intended use or sale — then independently recomputing the capitalisation rate from the entity's actual borrowings and applying it to the eligible expenditure incurred during the actual construction period, including testing that capitalisation was suspended during any extended interruption to construction activity.
Where capitalised interest most often goes wrong
The two recurring errors are capitalising interest on an asset that does not take a substantial period to complete, and continuing to capitalise through a period when construction activity actually stopped. Both inflate capital work in progress and understate current-period finance cost.
The testing sequence
- 01List every asset on which interest was capitalised during the year and assess qualifying-asset status for eachA substantial period is a matter of judgement, but routine inventory produced in large quantities on a repetitive basis, and assets ready for use when acquired, do not qualify regardless of how the client has treated them in the past.
- 02Identify whether borrowings are specific to the asset or part of a general poolThis determines the method: specific borrowings are capitalised at their actual rate net of any investment income on temporary surplus funds; general borrowings require a weighted average capitalisation rate across all borrowings outstanding during the period, excluding any borrowing specific to another qualifying asset.
- 03Independently recompute the weighted average capitalisation ratePull the actual loan balances and interest rates for the period from the borrowings register, not from the client's capitalisation working, and recompute the rate from first principles.
- 04Recompute eligible expenditure period by periodExpenditure on the asset incurred only during the period construction activities were actually being undertaken, applying the recomputed rate to the average qualifying expenditure for each sub-period, not a single blended figure for the year.
- 05Test for any suspension periodWhere active development was interrupted for an extended period, capitalisation should have stopped for that period. Site visit notes, contractor correspondence and progress photographs are useful evidence of whether work actually continued.
- 06Confirm capitalisation ceased at the right pointWhen substantially all the activities necessary to prepare the asset for its intended use are complete, capitalisation stops even if minor finishing work continues or the asset has not yet been brought into commercial use.
- 07Trace the capitalised amount to capital work in progress and the finance cost lineThe capitalised interest should reduce the finance cost expensed through the P&L by exactly the amount added to the asset, with no unexplained difference.
| Input | Source used for recomputation |
|---|---|
| Qualifying asset identification | Project nature and construction timeline, assessed independently of the client's classification |
| Capitalisation rate | Borrowings register, recomputed as a weighted average of actual outstanding balances |
| Eligible expenditure | Project cost ledger, period by period, excluding any suspension window |
| Capitalisation period | Site progress evidence, from start of qualifying activity to substantial completion |
Regulatory requirement
Ind AS 23 sets out the qualifying-asset definition, the weighted average rate method for general borrowings, and the requirement to suspend capitalisation during extended interruptions. Verify the current text before concluding.
How we think about this
The capitalisation rate and the eligible-expenditure arithmetic are fully computable from the borrowings register and the project cost ledger, and should be recomputed in full rather than spot-checked. Whether a given asset genuinely takes a substantial period to complete, and whether a lull in site activity amounts to an interruption, remain judgement calls the auditor has to make against the facts of the project.
This is practical guidance written for audit teams, not an authoritative statement of any standard or statute. Standards, forms and timelines change. Check the current text issued by the ICAI and the relevant authority before relying on anything here in an audit file.
Related resources
- Fixed assets & capexInd AS 23: borrowing costs, and which ones actually get capitalisedNot every loan funding construction gets its interest capitalised automatically — the asset has to qualify, and capitalisation has to actually stop at a specific point.
- Fixed assets & capexCapital work-in-progress (CWIP) audit proceduresAgeing stalled CWIP, testing the capitalisation trigger, applying Ind AS 23 in practice, and the ageing schedule now required in the financial statements.
- Fixed assets & capexCapex vs revenue expenditure: the audit testThe capitalisation criteria, the repairs-versus-improvement judgement calls that actually come up, and how to sample repairs and maintenance for misclassified capex.
- Bank, cash & treasuryLoans and borrowings audit checklistSanction letter checks, charge verification against ROC filings, covenant compliance, interest testing, and current/non-current classification.
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