A writedown in accounting is a required entry that reduces an asset’s carrying value on the books when its fair market value has dropped below what the balance sheet shows. Under U.S. Generally Accepted Accounting Principles (GAAP), companies can’t keep carrying an inflated number once evidence says the asset is worth less. The writedown lowers the asset, cuts net income by the same amount, and shrinks shareholders’ equity, all in the period the loss is recognized. No cash leaves the business, but the reported picture of what the company owns and earns changes immediately.
The mechanics vary by asset type. Equipment, inventory, patents, and goodwill each have their own testing rules, thresholds, and measurement methods. What they share is the underlying idea: when value is gone, GAAP wants it recognized rather than deferred.
When a Writedown Is Required
Companies don’t take writedowns whenever they feel like it. GAAP requires a recoverability review when specific events or changes in circumstances suggest an asset’s carrying amount may no longer be recoverable. Typical triggers include a steep drop in market price, a shift in the legal or regulatory environment, physical damage, technological obsolescence, a decision to dispose of the asset early, or significant operating losses in the business unit that uses it.
A triggering event doesn’t automatically mean the asset is impaired. It means management has to stop and test whether the book value still holds. Without a triggering event, long-lived assets like buildings and equipment don’t need routine impairment testing. Goodwill is the exception: it must be tested at least annually, whether or not anything appears to have gone wrong.
Long-Lived Assets: The Two-Step Test
For property, plant, and equipment and other tangible long-lived assets, ASC 360 sets up a two-step process.
Step one is a recoverability screen. The company totals the undiscounted future cash flows it expects the asset to generate through use and eventual disposal, then compares that total to the current carrying value. If undiscounted cash flows are higher, the asset passes and no writedown is recorded. The bar is deliberately low. Using undiscounted rather than present-value cash flows gives the asset every benefit of the doubt.
If the asset fails the screen, step two measures the loss as the difference between carrying value and fair value. Fair value comes from market data, comparable transactions, or a discounted cash flow model. The full loss hits the income statement in that period.1Deloitte Accounting Research Tool. Measurement of an Impairment Loss
A quick example. A manufacturer carries a production line at $5 million. Demand has shifted, and the equipment will now generate only $4 million in undiscounted cash flows over its remaining life. The asset fails step one. An appraisal puts fair value at $3.5 million. The company books a $1.5 million impairment charge, and the new $3.5 million becomes the depreciable base going forward.
Inventory Writedowns
Inventory follows a different rule. Under GAAP, inventory measured using FIFO, average cost, or any method other than LIFO or the retail method must be carried at the lower of cost or net realizable value (NRV). NRV is the estimated selling price in the ordinary course of business, minus reasonably predictable costs to complete, dispose of, and transport the goods.2Financial Accounting Standards Board. Accounting Standards Update 2015-11, Inventory (Topic 330)
When NRV falls below cost because goods are damaged, obsolete, or the market has moved against the company, inventory is written down to NRV. The loss flows through cost of goods sold rather than sitting on a separate impairment line. That placement compresses gross margin and can make core operations look weaker than they actually are for the period.
If a retailer holds $100,000 of last-season electronics that can now be cleared for only $60,000 net of selling costs, the $40,000 difference goes to COGS immediately and inventory drops to $60,000 on the balance sheet.
Inventory is one of the few areas where partial reversal is allowed. If NRV recovers within the same fiscal year, a company can restore a writedown in a later interim period, but the recovery is capped at the amount previously written down, and reversals across fiscal years are not permitted.2Financial Accounting Standards Board. Accounting Standards Update 2015-11, Inventory (Topic 330)
Intangible Assets
Patents, trademarks, customer lists, and capitalized software are tested when triggering events occur. Most of these intangibles have a finite useful life and are amortized over that life, but steady amortization doesn’t shield an asset from a writedown if its value collapses ahead of schedule. Losing patent protection, a departing key customer, or a technology shift can destroy economic value faster than the amortization curve assumes.
The testing process for finite-lived intangibles mirrors the PP&E approach: compare carrying value to undiscounted cash flows, and if the asset fails, measure the loss against fair value. Fair value is harder to pin down here because comparable market transactions are scarce. Companies usually build a discounted cash flow model that projects future income attributable to the specific intangible, which requires judgment on growth rates, retention, and discount rates. That subjectivity is why analysts read intangible writedowns closely.
Goodwill
Goodwill is the premium paid above the fair value of identifiable net assets in an acquisition. It captures brand strength, customer loyalty, and expected synergies. Unlike other intangibles, goodwill is never amortized. It sits on the balance sheet until an impairment test says otherwise.
GAAP requires goodwill to be tested for impairment at least annually and whenever a triggering event occurs. Testing happens at the “reporting unit” level, meaning a business segment or component with discrete financial information.3Financial Accounting Standards Board. Goodwill Impairment Testing
Since 2020, the quantitative test is a single step. Compare the fair value of the reporting unit to its carrying amount, goodwill included. If carrying amount exceeds fair value, an impairment loss is recognized equal to that excess, capped at the total goodwill assigned to that reporting unit.4Financial Accounting Standards Board. Accounting Standards Update 2017-04, Intangibles – Goodwill and Other (Topic 350)
Companies can also start with a qualitative assessment, sometimes called “Step 0,” asking whether it is more likely than not that fair value has fallen below carrying amount. If not, the quantitative test can be skipped for that year.5Deloitte Accounting Research Tool. Qualitative Assessment (Step 0)
Goodwill impairments often make headlines because they can be enormous. The charge is non-cash, but investors read it as an admission that the acquirer overpaid. A $4 billion goodwill writedown on a $10 billion acquisition is essentially the company telling the market that $4 billion of the deal’s expected value never materialized.
How a Writedown Moves Through the Financial Statements
Every writedown touches all three primary statements.
Income Statement
The impairment charge appears in operating income, either on its own line or inside a broader expense caption, and must be shown within continuing operations rather than buried in “other expense.”6Deloitte Accounting Research Tool. Presentation of an Impairment Loss That placement matters. The charge reduces operating income, net income, and earnings per share. A large writedown can turn a profitable quarter into a reported loss even though cash generation hasn’t changed.
Balance Sheet
The specific asset account (fixed assets, inventory, goodwill, or intangibles) drops by the writedown amount. Retained earnings absorbs the same reduction because the income statement loss flows to equity. Both sides shrink by the same amount, keeping the balance sheet in balance but weakening solvency ratios. Debt-to-equity climbs when equity falls and debt stays flat, which matters for companies operating near covenant limits.
Cash Flow Statement
Because a writedown is non-cash, no money leaves the company. Under the indirect method, the impairment charge is added back to net income in operating activities, the same way depreciation is.7PwC Viewpoint. Format of the Statement of Cash Flows When net income looks terrible but operating cash flow holds up, a non-cash writedown is often the reason.
Tax Treatment
Book accounting and tax accounting split here, and the disconnect surprises people. A GAAP writedown reduces reported earnings immediately, but it generally does not produce a tax deduction in the same period. Under federal tax law, a loss is deductible only when it is “sustained,” which for property typically means the asset has actually been sold, abandoned, or become worthless.8Office of the Law Revision Counsel. 26 USC 165 – Losses Marking an asset down on the books because fair value dropped doesn’t meet that threshold.
The practical result is a temporary difference. After a writedown, the book carrying value sits below the tax basis because the IRS hasn’t recognized the loss yet. That gap creates a deferred tax asset, reflecting the future tax benefit the company will eventually receive when it disposes of the asset and claims the deduction. The deferred tax asset partially offsets the earnings hit on paper, but the actual cash tax savings arrive later, when the disposition happens.
Goodwill works the same way. For tax purposes, acquired goodwill is amortized over 15 years regardless of what happens on the book side. A massive goodwill impairment does nothing to accelerate the tax schedule. The company keeps deducting the same annual amount until the business unit is sold or closed.
Can a Writedown Be Reversed?
For long-lived assets classified as held for use, no. Once the writedown is taken, the new lower carrying value is permanent. Restoration of a previously recognized impairment loss is prohibited under U.S. GAAP, even if the asset’s market value rebounds the following year.
Two exceptions exist. Assets reclassified as held for sale can have their carrying value restored up to the pre-impairment amount if fair value recovers before the sale closes. And, as covered above, inventory writedowns can be partially reversed within the same fiscal year, capped at the amount previously written down.2Financial Accounting Standards Board. Accounting Standards Update 2015-11, Inventory (Topic 330)
The no-reversal rule gives companies a strong incentive to get the fair value measurement right the first time. Overshoot the loss and there’s no correction mechanism.
Downstream Consequences
The statement effects aren’t just accounting. They spill into operations and outside relationships.
Debt covenants are the most immediate risk. Loan agreements often include minimum net worth, maximum debt-to-equity, or minimum asset coverage requirements. A large writedown shrinks both assets and equity, which can breach a covenant even though no cash was lost. A violation can trigger loan acceleration, rate increases, or forced renegotiation at the worst possible moment.
Executive compensation tied to earnings takes a hit too. If bonuses or equity awards depend on EPS or return on assets, a material writedown can wipe out payouts for the period. That tension gives managers a reason to delay writedowns, which is exactly the pattern regulators watch for. The SEC has brought fraud cases against firms that overstated illiquid asset values without a reasonable basis, and the required MD&A disclosures in Regulation S-K expect companies to flag potential impairment risks before any charge is booked, not just afterward.9Deloitte Accounting Research Tool. Impairment Disclosures Failing to write down an asset when the rules require it isn’t just an accounting misstep; it can become a securities violation.