When a production line loses a major customer, a distribution centre becomes underused, or equipment is made obsolete by a new process, the accounting question is not simply whether the asset still operates. The controller must assess whether its carrying amount remains recoverable under the applicable financial reporting framework.
Long-lived asset impairment can affect operating income, asset values, depreciation, segment reporting and management performance measures. It also requires coordination across finance, operations, engineering, commercial teams and valuation specialists. A rushed year-end calculation—built from an unchallenged forecast or an incorrectly grouped asset population—can create a material misstatement even when the arithmetic is correct.
This guide focuses on long-lived assets held and used in operations, such as property, plant and equipment and finite-lived intangible assets. Goodwill and indefinite-lived intangibles have separate requirements, and assets classified as held for sale follow a different model.
1. Start with the right impairment model
The broad objective is similar across the major frameworks: an asset should not remain recorded above the amount recoverable under the applicable standard. The mechanics, however, are not interchangeable.
- US GAAP — ASC 360: For long-lived assets held and used, a triggering event leads to a recoverability test. The carrying amount of the asset group is compared with the sum of undiscounted cash flows expected from use and eventual disposition. If it is not recoverable, the impairment loss is measured as the excess of carrying amount over fair value. See Deloitte’s US guide to ASC 360 impairments and disposals.
- IFRS — IAS 36: When an impairment indicator exists, compare carrying amount directly with recoverable amount. Recoverable amount is the higher of fair value less costs of disposal and value in use. Value in use uses discounted future cash flows. The IFRS Foundation’s IAS 36 overview explains the model and its scope.
- Canadian ASPE — Section 3063: For long-lived assets held for use, the model is broadly similar to the US two-step approach: compare carrying amount with undiscounted cash flows, then measure a loss using fair value if the asset is not recoverable. BDO Canada’s Section 3063 summary outlines scope, asset grouping and measurement.
A key difference is the subsequent treatment of impairment losses. Under ASC 360 and ASPE Section 3063, a recognized impairment loss on a long-lived asset held and used is not reversed if value later recovers. Under IAS 36, an impairment loss for an asset other than goodwill is reversed when the relevant estimates improve, subject to a ceiling: the revised carrying amount cannot exceed what it would have been, net of depreciation or amortization, had no impairment been recognized.
2. Ten controls to make impairment assessments defensible
1. Run a documented trigger review every reporting period
Do not wait for the annual audit or a formal restructuring announcement. Ask operations, sales, procurement, engineering and FP&A to report events that may indicate impairment. Common warning signs include a significant decline in market value, physical damage, technological obsolescence, a decision to idle or close a facility, adverse changes in the market or legal environment, and actual or forecast operating results materially below expectations.
Use a short questionnaire by plant, asset class and business unit. Require each owner to identify the event, affected assets, date identified, expected duration and supporting evidence. A “no indicators” conclusion should be documented rather than assumed.
2. Reconcile the asset population to the general ledger
Start with a complete listing of assets in scope. Reconcile the fixed-asset subledger to the general ledger and identify construction-in-progress, right-of-use assets where relevant, finite-lived intangibles and assets recorded outside the main register. Confirm that assets in service, idle assets, assets under development and assets recently transferred between locations are treated consistently.
Keep goodwill and indefinite-lived intangible assets on a separate assessment track. Inventory, financial assets, deferred tax assets and other excluded categories have their own impairment guidance; do not route every balance through ASC 360 or IAS 36.
3. Determine the correct asset group or cash-generating unit
An individual machine may not generate cash inflows independently. In US GAAP and ASPE, the analysis commonly uses an asset group at the lowest level for which identifiable cash flows are largely independent. Under IAS 36, a cash-generating unit (CGU) is the smallest identifiable group of assets that generates cash inflows largely independent of other assets or groups.
Document why the selected level reflects how the business actually operates. Avoid grouping an underperforming facility with unrelated profitable operations simply to create headroom. Conversely, do not test a component in isolation when it only generates cash as part of an integrated production line.
4. Align forecasts to approved operating plans
Cash-flow forecasts should reconcile to the latest management-approved budget or long-range plan, with a clear bridge for differences. Explain changes in volume, pricing, product mix, margins, labour, energy, maintenance, capital expenditure and working capital. Compare prior forecasts with actual results to identify persistent optimism or forecast bias.
For a plant losing a key customer, a forecast that assumes a full replacement customer next quarter needs evidence: signed contracts, qualified pipeline, capacity constraints and a realistic ramp-up schedule. A generic assumption that “sales will recover” is not a supportable forecast.
5. Apply the correct cash-flow basis
For the US GAAP and ASPE recoverability screen, the relevant test uses undiscounted cash flows. Do not discount the cash flows for this first step. If the test fails, fair value is used to measure the loss. Under IAS 36, value in use is discounted and compared with fair value less costs of disposal; the higher amount is the recoverable amount.
Keep the recoverability calculation separate from the valuation calculation. Mixing discounted and undiscounted cash flows can lead to a wrong conclusion even when the forecast itself is reasonable.
6. Challenge useful lives, residual values and disposal assumptions
Check whether the remaining useful life is still realistic given maintenance history, operating hours, expected product demand, technology changes and planned facility use. Support residual values with market data or a documented estimate. Include costs and cash flows that belong in the relevant model, and avoid double-counting items already recognized as liabilities.
Where a sale or disposal is planned, establish whether the asset remains held and used or qualifies for held-for-sale classification. For example, ASC 360, IFRS 5 and ASPE Section 3475 have separate disposal guidance. A management discussion about “possibly selling the plant” is not, by itself, enough to apply a held-for-sale model.
7. Support fair value with independent evidence
If measurement requires fair value, consider market quotations, recent transactions involving comparable assets, independent appraisals or an appropriate valuation technique. Document the asset condition, location, remaining useful life, obsolescence, restrictions and costs that market participants would consider. If a discounted cash-flow technique is used to estimate fair value, make sure the assumptions reflect the relevant market-participant perspective rather than simply reusing management’s value-in-use assumptions.
For material or complex assets, consider whether a valuation specialist is needed. The controller should still understand and challenge the methods, source data and significant assumptions.
8. Build sensitivity and downside analysis into review
Identify the assumptions that drive the conclusion: volume, selling price, contribution margin, utilization, discount rate, terminal or disposal value and timing of recovery. Calculate how much each critical assumption can move before the impairment conclusion changes. Where headroom is small, show a reasonable downside scenario and explain why the base case remains supportable.
For audit readiness, retain the version of the model reviewed, the source of each key input, reviewer comments, responses and approval date. Do not overwrite the original calculation after review.
9. Record the accounting impact and update future depreciation
When an impairment loss is recognized, confirm the affected asset or asset group, account mapping, legal entity, reporting segment and income-statement presentation. Under US GAAP and ASPE, the adjusted carrying amount becomes the new cost basis for subsequent depreciation or amortization. Under IFRS, revise future depreciation or amortization using the reduced carrying amount and remaining useful life.
Update the fixed-asset subledger and confirm that the next depreciation run uses the revised basis. A correct impairment journal followed by an unchanged depreciation schedule creates a second error.
10. Control reversals, disclosures and consolidation adjustments
For IFRS reporters, review previously impaired assets for indicators that a loss may have decreased and assess whether a reversal is required, subject to the IAS 36 ceiling. For US GAAP and ASPE held-and-used assets, do not reverse a prior impairment simply because market values or forecasts improve. Maintain framework-specific instructions in the accounting policy and close checklist.
Prepare disclosures that explain material impairment losses, the events and circumstances leading to them, the affected asset or asset group, the amount recognized and the basis used to determine fair value or recoverable amount, as required by the applicable framework. For groups reporting under more than one framework, maintain a clear reconciliation of differences in measurement and subsequent treatment.
3. A simple example: why framework selection matters
Assume a manufacturing asset group has a carrying amount of $5.0 million. Its forecast undiscounted cash flows from use and eventual disposition total $4.4 million. An independent valuation indicates fair value of $3.7 million. For illustration, assume the IFRS recoverable amount is $4.0 million, based on value in use of $4.0 million and fair value less costs of disposal of $3.5 million.
| Framework | Test result | Illustrative impairment |
|---|---|---|
| US GAAP / ASC 360 | $4.4m undiscounted cash flows are below $5.0m carrying amount; measure loss using $3.7m fair value | $1.3m |
| Canadian ASPE / Section 3063 | Recoverability screen fails; measure loss using $3.7m fair value | $1.3m |
| IFRS / IAS 36 | $4.0m recoverable amount is below $5.0m carrying amount | $1.0m |
This simplified example shows why a single model should not be copied across reporting bases. Actual calculations require a careful scope assessment, correct asset grouping, supportable assumptions and the detailed requirements of the applicable standards.
4. What auditors will expect to see
For US issuers, PCAOB AS 2501, Auditing Accounting Estimates, Including Fair Value Measurements, describes auditor procedures for evaluating the methods, data and significant assumptions used in estimates. It also addresses the reasonableness of assumptions, external data, management bias and the use of specialists. The standard governs the auditor’s work, but it is a useful signal of the evidence a controller should be prepared to provide.
Keep one impairment file per material asset group or CGU containing the trigger assessment, fixed-asset reconciliation, grouping rationale, approved forecast, model calculations, valuation evidence, sensitivities, review sign-offs, journal entry and disclosure support. A reviewer should be able to trace the conclusion from the original operational event through to the financial statements without reconstructing the analysis from emails.
Controller’s impairment close checklist
- Obtain documented impairment indicators from operating and commercial leaders.
- Reconcile the in-scope asset population to the general ledger.
- Document the asset group or CGU and the reason for its boundaries.
- Reconcile forecast assumptions to approved plans and actual performance.
- Apply the correct undiscounted or discounted cash-flow model for the reporting framework.
- Support fair value or recoverable amount with appropriate evidence.
- Review sensitivity, headroom and potential management bias.
- Post approved entries and update future depreciation or amortization.
- Assess reversal requirements separately for each reporting framework.
- Complete material disclosures and retain a review-ready evidence file.
Conclusion
Long-lived asset impairment is a cross-functional control process, not a last-minute valuation exercise. Controllers can improve the quality of the conclusion by identifying triggers early, using the right asset grouping, governing forecasts, challenging valuations and maintaining separate calculations for US GAAP, IFRS and Canadian ASPE. The result is more reliable asset values, fewer close surprises and a clearer audit trail.
Disclaimer: This article is for general informational purposes only and is not accounting, audit, valuation or legal advice. Apply the full authoritative guidance relevant to your reporting framework and circumstances, and consult qualified professionals for material or complex impairment assessments.
