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Goodwill Impairment Assessment: Building Persuasive Audit Evidence Under HKFRS
Practical audit procedures, evidence points, and documentation considerations for Hong Kong audit teams.
Practice Overview
Last updated: 16 September 2026
Goodwill impairment is often a high-judgement financial-reporting area because the conclusion depends on how goodwill is allocated to cash-generating units (CGUs), how recoverable amount is determined, and whether forward-looking assumptions remain supportable at the reporting date. Under the high-level HKAS 36 model, goodwill acquired in a business combination is subject to an annual impairment assessment and is considered with the CGU or group of CGUs to which it is allocated. For Hong Kong auditors, a disciplined risk assessment should focus on the entity’s business model, performance against prior forecasts, macroeconomic and sector conditions, integration progress, changes in plans, and incentives that could contribute to optimism or management bias. A result showing no impairment is not, by itself, evidence that the assessment is robust; the audit trail should explain why the underlying inputs, model and conclusion are reasonable in the circumstances.
An effective response connects assessed risks to tailored procedures, relevant controls and sufficient appropriate evidence. The work ordinarily needs to address the accounting mechanics as well as the reliability of the data, forecasts and valuation judgements that drive the recoverable-amount calculation. Clear contemporaneous documentation can enable an experienced reviewer to understand the CGU allocation, the sources and challenge of key inputs, contradictory evidence considered, the effect of reasonably possible changes in key assumptions, and the basis for conclusions on recognition and disclosure. This article is general professional technical education for Hong Kong auditors; it is not engagement-specific audit, legal, tax, regulatory or financial-reporting advice, and practitioners should apply current authoritative requirements and professional judgement to the facts and circumstances of each engagement.
Key Audit Issues
Allocation of goodwill and the unit of account
An inappropriate allocation of goodwill to a CGU or group of CGUs can mask underperformance or distort headroom. Consider whether the allocation is consistent with the way benefits are monitored internally, whether the carrying amounts included in the test are complete and reconcilable, and whether reorganisations, disposals or changes in reporting structure require reassessment.
Recoverable-amount methodology and model integrity
Management’s approach should be suitable for the circumstances and applied consistently with the financial-reporting framework. Audit-quality risks arise where the model mixes assumptions or cash flows inconsistently, double counts benefits, omits necessary cash outflows, uses an inappropriate period or fails to reconcile the tested carrying amount to supporting records.
Forecast cash flows and management bias
Revenue growth, margins, working-capital movements, capital expenditure and restructuring or expansion assumptions can materially affect the result. A forecast may be less persuasive when it departs from approved plans, historical forecasting accuracy, current trading results, external market information or other evidence available at the reporting date without a documented, supportable explanation.
Discount rates, terminal growth and market inputs
Small changes in discount rates or long-term growth assumptions may materially alter recoverable amount, especially where headroom is limited. The auditor should understand the source and internal consistency of significant inputs, distinguish entity-specific assumptions from market-based evidence where relevant, and evaluate whether the assumptions used are compatible with the selected valuation approach.
Disclosure, sensitivity and subsequent information
Financial statement disclosures should faithfully convey significant judgement and estimation uncertainty where required by the applicable framework. Post-reporting-date trading, financing developments, market data or revised budgets may corroborate or challenge the assessment, depending on their nature and timing; their implications should be evaluated rather than treated as automatic proof of the reporting-date conclusion.
Tailored Audit Procedures
Map the goodwill population and CGU allocation
Obtain management’s goodwill roll-forward and impairment-testing schedule; reconcile material balances to the consolidation records and financial statements; and inspect the allocation to CGUs or groups of CGUs. Understand changes since the prior period and evaluate whether the tested carrying amount includes the relevant assets and liabilities on a consistent basis.
Understand the assessment process and identify risks
Walk through the process from planning and data extraction through review, approval and reporting. Inquire about performance shortfalls, integration outcomes, strategic changes, financing constraints, competitor activity and other developments that may affect assumptions or the assessed risk of material misstatement, then tailor the audit response accordingly.
Test the integrity of source data and mathematical accuracy
Test selected inputs in the model to reliable underlying records, including historical actuals, approved budgets and relevant operating data. Reperform key calculations, inspect formulas and links, and investigate unexplained manual overrides, version changes, inconsistencies or omissions that could affect the recoverable-amount conclusion.
Challenge significant forecast assumptions
Compare material forecast assumptions with historical results, prior forecasts, approved plans, current-period trading and relevant external information. Where assumptions differ from those sources, obtain and evaluate management’s rationale, assess contradictory evidence and consider whether the pattern of judgements indicates possible management bias.
Evaluate valuation inputs and any specialist work
Assess the appropriateness of the methodology and evaluate significant discount-rate, terminal-growth and other valuation inputs in light of the selected approach and available evidence. When management or the auditor uses a specialist, evaluate the relevance of that work to the audit objective and perform procedures appropriate to the specialist’s competence, capabilities, objectivity, methods, data and conclusions.
Assess headroom, disclosures and the overall conclusion
Analyse the amount and drivers of headroom and perform sensitivity work focused on reasonably possible changes in significant assumptions where relevant. Evaluate the proposed impairment, if any, and related disclosures against the applicable financial-reporting framework, consider relevant subsequent information, and document how the evidence supports the final audit conclusion.
Controls and Evidence to Consider
Governed annual assessment timetable
Evidence may include an approved timetable, defined responsibilities, a current inventory of goodwill and CGUs, and review sign-offs. The control objective is to reduce the risk that a required assessment, a material CGU or a significant change in allocation is omitted.
Budget and forecast governance
Useful evidence includes formally approved budgets, challenge records, variance analyses, forecast revision logs and board or management papers. These records can help establish whether the cash-flow inputs used in the test are subject to informed review and whether departures from historical performance are understood.
Model change and data controls
Retain controlled model versions, access or change logs where available, input-to-ledger reconciliations, formula checks and evidence of independent review. Such evidence supports the completeness, accuracy and traceability of calculations, but it does not replace substantive evaluation of the assumptions.
Technical review and disclosure checklist
A documented review of methodology, significant judgements, sensitivity analysis and draft disclosures—supported by reviewer queries and their resolution—can provide an audit trail for complex conclusions. The documentation should identify the evidence considered, including contrary evidence, rather than merely record a final sign-off.
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