An impairment loss is a write-down that reduces an asset’s recorded value on the balance sheet when that value exceeds what the asset can actually recover through continued use or sale. Under U.S. GAAP, the reduction is permanent and flows through the income statement as an operating expense in the period it is recognized. Companies test for impairment when specific warning signs appear, and for goodwill and indefinite-lived intangibles at least once a year. Getting the number right matters because overstating asset values misleads investors and draws scrutiny from auditors and regulators.
How an Impairment Loss Works
Every asset on a balance sheet has a carrying amount: original cost minus depreciation taken so far. An impairment loss exists when that carrying amount is higher than what the asset can recover. Under IFRS (IAS 36), the recoverable amount is the higher of fair value less costs to sell, or value in use, which is the present value of cash flows the asset will generate over its remaining life.1IFRS. IAS 36 Impairment of Assets
U.S. GAAP handles the mechanics differently. Under ASC 360, long-lived assets go through a two-step process: a screening test using undiscounted cash flows, and only if the asset fails that screen, a fair value measurement. The underlying idea is the same. If the books say an asset is worth more than it can deliver, the gap has to be recognized as a loss.
Triggers That Signal Possible Impairment
You don’t test every asset constantly. You watch for specific warning signs, and only then run the numbers. The triggers fall into two categories.
External signals come from outside the company:
- A sharp market value decline that goes well beyond normal aging or depreciation.
- Regulatory or legal changes, such as new environmental rules or zoning restrictions, that cut the asset’s productive life.
- Competitive shifts, including a rival’s new technology or a broad economic downturn that reduces the cash flows the asset was expected to generate.
- A company’s market capitalization falling below its book value, which the SEC staff has flagged as a signal that asset groups may be overstated.
Internal signals come from within the business:
- Physical damage from fire, flood, or accident that permanently reduces capacity.
- Obsolescence or a change in use, such as plans to dispose of equipment early or a shift that makes a production line redundant.
- Consistent operating losses in a segment, which suggests the assets supporting it need evaluation.
A single trigger doesn’t automatically mean an impairment loss exists. It means you have to run the test.
Which Assets Get Tested and How Often
Long-lived tangible assets used in operations, such as factory equipment, buildings, and vehicles, are tested only when a triggering event occurs. Intangible assets with finite useful lives, like patents or software licenses, follow the same trigger-based approach.
Intangible assets with indefinite lives, such as certain trademarks, must be tested at least annually whether or not warning signs appear. Goodwill sits in its own category. Because goodwill arises when a company pays more for an acquisition than the target’s net asset value, the standards require an annual impairment test plus additional testing whenever triggering events occur between annual reviews.2FASB. Goodwill Impairment Testing Most companies schedule these tests alongside their year-end reporting.
Calculating an Impairment Loss on Long-Lived Assets
Under ASC 360, the calculation for long-lived assets held and used in operations is a two-step process.
Step 1: Recoverability test. Compare the asset’s carrying amount to the total undiscounted future cash flows it is expected to generate, including any eventual sale proceeds. The cash flows are entity-specific: they reflect how your company actually uses the asset. If the undiscounted cash flows exceed the carrying amount, the asset passes and no impairment is recorded. Most tests end here.
Step 2: Measure the loss. If the asset fails, you measure fair value and recognize the difference. The impairment loss equals carrying amount minus fair value. If manufacturing equipment sits on the books at $500,000 but its fair value is only $350,000, the impairment loss is $150,000.
The screening step deliberately uses undiscounted cash flows, which makes it a higher bar to fail. An asset can be economically impaired in a present-value sense and still pass this test, because ignoring the time value of money inflates the total. FASB made this choice to prevent excessive write-downs on assets that are still generating positive cash flows.
Not every asset produces cash flows on its own. A conveyor belt inside a production line doesn’t generate revenue independently. When that’s the case, assets are grouped at the lowest level where identifiable cash flows are largely independent of other groups, and the recoverability test applies to the group as a whole.
How Goodwill Impairment Is Different
Goodwill testing used to involve a complicated two-step process. A 2017 update (ASU 2017-04) eliminated the second step. You now compare the fair value of the entire reporting unit to its carrying amount, including goodwill. If carrying amount is higher, the difference is the impairment loss, capped at the total goodwill allocated to that unit.2FASB. Goodwill Impairment Testing
Goodwill impairment often produces the largest dollar figures in corporate accounting. When a major acquisition underperforms, the resulting write-down can wipe out an entire quarter’s earnings. The simplified test makes the arithmetic easier, but valuing the reporting unit still involves heavy judgment.
Measuring Fair Value
Whether you’re testing a single machine or an entire reporting unit, fair value follows the hierarchy in ASC 820, which ranks inputs by reliability:
- Level 1 is quoted prices in active markets for identical assets. If your equipment model trades on a well-established secondary market, that price is the most reliable input.
- Level 2 covers observable inputs that aren’t direct quotes for identical assets, such as prices for similar assets, interest rates, or yield curves that can be adjusted to estimate value.
- Level 3 relies on unobservable inputs based on your own assumptions and models. Discounted cash flow projections live here, and this tier is the least reliable because it rests on management judgment.
In practice, most impairment measurements for operating assets end up at Level 3, because no active market exists for a used factory floor or a custom software platform. A discounted cash flow method estimates future earnings and discounts them to present value using a rate that reflects the risk of realization. A market-based approach works better when comparable sales data exists, such as recent transactions for similar commercial real estate or standard equipment.
Recording the Loss in the Financial Statements
Once measured, an impairment loss lands in two places. On the income statement, it appears as an operating expense within continuing operations, reducing net income for the period. On the balance sheet, the asset’s carrying amount drops to its new fair value through either a direct write-down or an adjustment to accumulated depreciation.
That reduced amount becomes the asset’s new cost basis. Future depreciation is then recalculated using this lower starting point over whatever useful life remains. In the $500,000 example, after the $150,000 loss, the company depreciates the remaining $350,000 over the remaining life.
Under U.S. GAAP, the write-down is final. You cannot reverse it later if the asset’s value recovers. From the write-down forward, the only direction the recorded value can move is further down, through continued depreciation or another impairment.
Disclosure Requirements
Recording the loss isn’t the end of the process. Footnote disclosures generally cover a description of the impaired asset, the circumstances that led to the write-down, the dollar amount, how fair value was determined (including which level of the fair value hierarchy was used), and where the loss appears on the income statement. Auditors and the SEC review these disclosures closely, particularly when the amounts are large or the timing lines up with other financial pressure.
How an Impairment Loss Affects Financial Ratios
An impairment loss ripples through nearly every ratio a lender or investor watches. The loss reduces net income and, through retained earnings, shrinks total equity. Debt stays the same. The debt-to-equity ratio rises, which can make the company look more leveraged overnight even though its actual borrowing hasn’t changed.
Return on assets shifts too, in a counterintuitive direction. In the period the loss is recognized, reduced income drags the ratio down. In later periods, the smaller asset base can actually make returns look better, because future income is divided by a lower denominator. Analysts who follow a company closely adjust for this. Automated screening tools often don’t.
The practical danger is debt covenants. Many loan agreements require the borrower to maintain specific ratio thresholds. A large impairment loss can push a company past those limits and trigger a technical default or accelerate repayment. Companies facing significant write-downs often negotiate covenant amendments with their lenders before releasing the financial statements.
Assets Reclassified as Held for Sale
When a company decides to sell an asset rather than continue using it, the rules change. An asset classified as held for sale is measured at the lower of carrying amount or fair value minus cost to sell. There is no preliminary undiscounted cash flow test; you go straight to the fair value comparison.
Depreciation also stops the moment the asset is reclassified. If the asset is being sold rather than used up over time, continuing to depreciate it doesn’t reflect economic reality. Any loss recognized on reclassification is the gap between carrying amount and fair value less selling costs.
Tax Treatment of Impairment Losses
Book accounting and tax law part ways here. A GAAP impairment loss reduces book income immediately, but the IRS generally does not allow a tax deduction until the asset is actually disposed of, sold, or abandoned. The tax code requires that a deductible loss be sustained during the taxable year, which for most long-lived assets means a completed disposition, not a downward revaluation on paper.3Office of the Law Revision Counsel. 26 US Code 165 – Losses
The timing gap creates a temporary difference between book income and taxable income. The company records a deferred tax asset representing the future benefit it will receive when the deduction becomes available. If a facility closes in 2026 but the impairment was booked in 2024, the tax deduction arrives with the 2026 closure.
Goodwill follows the same pattern. For tax purposes, goodwill is not deductible until the reporting unit is sold or otherwise closed, regardless of when the book impairment is recognized. Companies with large goodwill write-downs can carry substantial deferred tax assets on their balance sheets for years before realizing the benefit.
Key Differences Between U.S. GAAP and IFRS
Companies that report under international standards follow a meaningfully different framework, and the differences change both measurement and reversibility.
- Reversal: under U.S. GAAP, an impairment write-down on a long-lived asset is permanent. IFRS permits reversal of impairment losses on non-goodwill assets if the conditions that caused the original write-down improve. Goodwill impairment cannot be reversed under either framework.1IFRS. IAS 36 Impairment of Assets
- Recoverability screening: U.S. GAAP’s two-step process starts with an undiscounted cash flow test that filters out assets still generating positive cash flows. IFRS skips this screen and compares carrying amount directly to a recoverable amount calculated using discounted figures.
- Goodwill testing level: U.S. GAAP tests goodwill at the reporting unit level. IFRS tests at the cash-generating unit level, which can be smaller and may produce different results for the same company.2FASB. Goodwill Impairment Testing
The same economic decline can produce different impairment outcomes depending on which framework governs the statements. A multinational preparing both GAAP and IFRS statements may recognize an impairment under one framework but not the other, or recognize different amounts. For investors comparing companies across borders, knowing which standard applies is essential context for reading the asset values on the balance sheet.