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Recoverability Assessments: Building Defensible Impairment Audit Evidence
Practical audit procedures, evidence points, and documentation considerations for Hong Kong audit teams.
Practice Overview
Last updated: 16 September 2026
Recoverability assessments demand more than a model that produces a surplus over carrying amount. Under HKAS 36, recoverable amount is considered through value in use or fair value less costs of disposal, and cash-generating units may be relevant when individual assets do not generate largely independent cash inflows. A small movement in forecast cash flows, growth, margins, capital expenditure, working capital or discount rates can change the conclusion. The audit-quality risk is therefore highest when the file records a management conclusion but does not clearly demonstrate the indicators considered, the unit tested, the source and challenge of key assumptions, and the reasoning that connects evidence to the conclusion.
A proportionate audit response starts with an understanding of the entity’s process and the specific sources of estimation uncertainty, then tailors work to the assertions and risk characteristics of the balance. In high-judgement cases, the working papers should show how the team challenged management’s model, considered evidence that points in a different direction, evaluated relevant disclosures and reached its conclusion. The high-level concepts in HKSA 315, HKSA 500 and HKSA 540 (Revised) help frame that work, but this article is general professional technical education for Hong Kong auditors rather than engagement-specific audit, legal, tax or regulatory advice.
Key Audit Issues
Impairment indicators and the population assessed
A weak assessment may begin with an incomplete search for internal and external indicators, such as adverse changes in markets, operating performance, asset use, financing conditions or plans for disposal or restructuring. The file should make clear which assets or cash-generating units were considered, why the population is complete, and why an annual assessment or an indicator-based assessment is relevant under the applicable HKFRS requirements.
Cash-generating unit identification and asset allocation
The conclusion can be distorted if assets are grouped too broadly, or if goodwill and corporate assets are allocated without a supportable basis. Auditors need to understand how management identifies cash-generating units, whether the grouping reflects independent cash inflows in the entity’s current circumstances, and how carrying amounts reconcile to the general ledger and financial statements.
Forecast reliability and management bias
Value-in-use models often depend on budgets, long-range plans and assumptions that are highly judgemental. Risks increase where forecasts consistently exceed prior performance, planned corrective actions lack evidence, or expected benefits are not supported by contracts, operational plans or observable market information. A file should distinguish management’s expectation from evidence that supports it and record the response to potentially optimistic assumptions.
Valuation method, model mechanics and discount rates
The choice between value in use and fair value less costs of disposal, the treatment of cash flows, terminal growth and discount rates, and the mathematical integrity of the model can each affect recoverable amount. The audit team should understand the method used, test whether inputs and model mechanics are consistent with the stated basis of measurement, and identify where valuation expertise may be needed.
Disclosures, contradictory evidence and conclusion documentation
Impairment assessments may produce modest headroom even when no loss is recognised. The audit file should address whether the financial statements communicate material estimation uncertainty or sensitivity where relevant, rather than treating disclosure as an afterthought. It should also identify contradictory information, subsequent developments considered before report completion, consultations and the basis on which unresolved judgement was concluded.
Tailored Audit Procedures
Map the impairment assessment process and identify risk factors
Obtain an understanding of how management identifies impairment indicators, selects assets or cash-generating units, prepares forecasts, approves assumptions and records the result. Link the risk assessment to entity-specific conditions, such as recent performance, changes in demand, financing constraints, project delays or unused capacity, rather than relying on a generic checklist.
Test the completeness and composition of the tested population
Reconcile the listing of assets and cash-generating units used in the assessment to the general ledger and relevant financial statement balances. Evaluate the rationale for the cash-generating unit boundaries and for allocating goodwill or corporate assets, and investigate material changes from the prior period or between management reporting and impairment-testing units.
Evaluate forecast inputs through retrospective and current-period evidence
Compare selected prior-period forecasts with actual outcomes to understand forecasting accuracy and possible bias. For current forecasts, test significant revenue, margin, cost, capital expenditure and working-capital assumptions to approved budgets, contracts, board materials, operational plans and relevant external information, taking account of conditions at the reporting date.
Challenge key valuation assumptions and independently test the model
Reperform material calculations and test the arithmetical accuracy and internal consistency of the model. Challenge the methodology, period of cash flows, terminal growth and discount-rate inputs against the stated valuation basis and available evidence; consider involving a suitably qualified valuation specialist where the nature or complexity of the estimate warrants it.
Assess sensitivity and headroom against plausible adverse changes
Evaluate management’s sensitivity analysis or develop focused audit scenarios for the assumptions that drive the recoverable amount. Where headroom is limited, document which reasonably possible movements are most relevant, whether they are consistent with the risk assessment, and how the result affects the evidence needed for the accounting conclusion and related disclosures.
Complete the evidence trail and evaluate presentation and disclosure
Read relevant board minutes, post-year-end information available before report completion and other sources for evidence that corroborates or conflicts with management’s assessment. Evaluate whether the impairment conclusion and related disclosures are consistent with the evidence obtained, then document significant judgements, challenges, consultations, review points and the final basis for the audit conclusion.
Controls and Evidence to Consider
Periodic indicator review with accountable ownership
A defined reporting timetable can require finance and operational management to review impairment indicators, record the assets or cash-generating units considered and escalate significant changes. Useful evidence includes completed indicator assessments, management accounts, market updates, meeting minutes and documented escalation of exceptions.
Controlled forecasts and reconciled source data
Forecasts used for impairment testing should be traceable to approved planning information and reconciled to source systems or financial records. Evidence can include budget approvals, reconciliations, version histories, explanations of manual adjustments and review sign-offs for changes to significant assumptions.
Independent review of models and critical assumptions
A reviewer independent of model preparation can challenge cash-flow assumptions, valuation methodology, discount rates and calculations before the assessment is finalised. Retained evidence may include reviewer comments and resolutions, benchmarking papers, specialist reports where used, and records explaining departures from historical performance or market data.
Documented governance, disclosure review and evidence retention
Clear approval thresholds and a disclosure checklist can help ensure that significant judgements, sensitivities and impairment outcomes are considered by appropriate management personnel. The record should preserve the final model, key-source documents, approval minutes, disclosure drafts, change logs and the rationale for the conclusion in a retrievable audit trail.
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