A writedown in accounting is the formal reduction of an asset’s recorded book value when its fair market value drops below the amount on the balance sheet. U.S. Generally Accepted Accounting Principles (GAAP) require the company to recognize that loss rather than carry an inflated figure forward. The immediate effect is the same across asset types: reported assets shrink, net income falls, and shareholders’ equity takes a matching hit. The mechanics, however, differ depending on whether the asset is equipment, inventory, a patent, or goodwill.
What Triggers a Writedown
Companies don’t write down assets at will. GAAP requires a recoverability review when specific events or changed circumstances suggest an asset’s carrying amount may no longer be recoverable. Common 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 an asset ahead of schedule, or significant operating losses in a business segment.
A triggering event doesn’t automatically mean the asset is impaired. It means management must stop and test whether the book value still holds up. Absent a trigger, long-lived assets like equipment and buildings don’t require routine impairment testing. Goodwill is the exception: it must be tested at least annually regardless of whether anything has gone wrong.
How the Rules Differ by Asset Type
Property, Plant, and Equipment
For tangible long-lived assets, impairment testing under ASC 360 follows a two-step process. The first step is a recoverability screen. The company adds up all the undiscounted future cash flows the asset is expected to generate through use and eventual disposal, then compares that total to the asset’s carrying value. If the undiscounted cash flows exceed the carrying value, the asset passes and no writedown is needed. By using undiscounted figures rather than present-value calculations, the test gives the asset every benefit of the doubt before forcing a loss.
If the asset fails that screen, the company measures the impairment loss as the difference between the carrying value and the asset’s fair value. Fair value is typically estimated through market data, comparable transactions, or a discounted cash flow model. The entire loss hits the income statement immediately.1Deloitte Accounting Research Tool. Measurement of an Impairment Loss
Suppose a manufacturer carries a specialized production line at $5 million, but changing demand means the equipment will generate only $4 million in total undiscounted cash flows over its remaining life. The asset fails the recoverability test. An appraisal pegs its fair value at $3.5 million. The company records a $1.5 million impairment charge, and the new $3.5 million carrying value becomes the depreciable base going forward.
Inventory
Inventory follows different rules. GAAP uses a straightforward comparison: inventory measured under 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 market prices have dropped, the company writes inventory down to NRV. The loss flows through cost of goods sold on the income statement, not as a separate impairment line item. That distinction matters for financial analysis: the writedown inflates COGS and compresses gross margin, which can make core operations look weaker than they actually are in a given period.
A retailer stuck with $100,000 of last-season electronics it can now sell for only $60,000 after clearance costs recognizes the $40,000 difference immediately as an increase to cost of goods sold. The balance sheet then shows $60,000 of inventory instead of $100,000.
Finite-Lived Intangibles
Patents, trademarks, customer lists, and capitalized software costs are all subject to impairment testing when triggering events occur. Most of these intangibles have a finite useful life and are amortized over that life, but steady amortization doesn’t protect an asset from a writedown if its value drops suddenly. Losing patent protection, a key customer defection, or a technology shift can destroy economic value faster than the amortization schedule anticipated.
The testing process largely mirrors the PP&E approach: compare carrying value to undiscounted future cash flows, and if the asset fails, measure the loss against fair value. Fair value is harder to pin down for intangibles because comparable market transactions are scarce, so companies usually rely on discounted cash flow models that project the future income attributable to the specific intangible.
Goodwill
Goodwill is the premium a company pays above the fair value of identifiable net assets when it acquires another business. Unlike other intangibles, goodwill is never amortized. It sits on the balance sheet until an impairment test says otherwise, which means the full acquisition premium can linger for years before anyone formally asks whether it was justified.
GAAP requires goodwill to be tested for impairment at least annually, plus whenever a triggering event occurs. The test is performed at the “reporting unit” level, which is a business segment or component with discrete financial information available.3Financial Accounting Standards Board. Goodwill Impairment Testing Since 2020, the test is a single quantitative step: compare the fair value of the reporting unit to its carrying amount including goodwill. If carrying amount exceeds fair value, the company recognizes an impairment loss equal to that excess, capped at the total goodwill allocated to that reporting unit.4Financial Accounting Standards Board. Accounting Standards Update 2017-04, Intangibles – Goodwill and Other (Topic 350)
Companies may start with an optional qualitative assessment, sometimes called “Step 0,” that asks whether it is more likely than not (above 50 percent) that the reporting unit’s fair value has fallen below its carrying amount. If the answer is no after considering macroeconomic conditions, industry trends, and recent performance, the company can skip the quantitative test for that year.5Deloitte Accounting Research Tool. Qualitative Assessment (Step 0)
Goodwill impairment charges are often enormous and routinely make headlines. While the charge itself is non-cash, investors read it as an admission that the acquiring company overpaid. A $4 billion writedown on a $10 billion acquisition tells the market that roughly $4 billion of the deal’s expected value never materialized.
How a Writedown Moves Through the Financial Statements
Every writedown touches all three primary financial statements.
Income Statement
The impairment charge appears in operating income, either on its own line or embedded in a broader expense caption. It must be included within continuing operations, not buried below the line in “other expense.”6Deloitte Accounting Research Tool. Presentation of an Impairment Loss That placement directly reduces operating income, net income, and earnings per share. A major impairment can turn a profitable quarter into a reported loss even though actual cash generation hasn’t changed.
Balance Sheet
On the asset side, the specific account (fixed assets, inventory, goodwill, or intangibles) drops by the writedown amount. On the equity side, retained earnings absorb the same hit because the loss on the income statement flows through to equity. Both sides of the accounting equation shrink by the same amount, keeping the balance sheet in balance but weakening solvency ratios. The debt-to-equity ratio rises when equity shrinks while debt stays the same, which can matter enormously for companies operating near debt covenant limits.
Cash Flow Statement
Because a writedown is a non-cash expense, no money actually leaves the company. Under the indirect method, the impairment charge is added back to net income in the operating activities section, just like depreciation.7PwC Viewpoint. Format of the Statement of Cash Flows If net income looks terrible but operating cash flow remains strong, a non-cash writedown is often the explanation.
Tax Impact
Book accounting and tax accounting part ways here, and the disconnect catches many people off guard. A GAAP writedown reduces reported earnings immediately, but it generally does not create 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 when the asset is actually sold, abandoned, or becomes worthless.8Office of the Law Revision Counsel. 26 USC 165 – Losses Marking an asset down on the books because its fair value dropped doesn’t meet that threshold.
The practical result is a temporary difference between the asset’s book value and its tax basis. After a writedown, the book carrying value is lower than 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 from the writedown on paper, but the actual cash tax savings won’t arrive until the asset is sold or shut down.
Goodwill follows the same pattern. For tax purposes, acquired goodwill is amortized over 15 years regardless of what happens on the book side. A massive goodwill impairment charge on the income statement does nothing to accelerate the tax amortization schedule.
Can a Writedown Be Reversed
Under U.S. GAAP, once you write down a long-lived asset classified as held for use, the new lower carrying value becomes permanent. Restoration of a previously recognized impairment loss is prohibited. Even if the asset’s market value rebounds the following year, the company cannot reverse the charge and write the asset back up. A writedown taken during a temporary downturn therefore permanently reduces book value and changes future depreciation calculations.
Two exceptions apply. 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 inventory writedowns can be partially reversed within the same fiscal year if NRV recovers, though gains in later interim periods cannot exceed the losses recognized in earlier interim periods of that same year.2Financial Accounting Standards Board. Accounting Standards Update 2015-11, Inventory (Topic 330)
Disclosure Requirements
When a company records an impairment, GAAP requires specific disclosures in the footnotes to the financial statements for the period in which the loss is recognized:
- A description of the impaired asset and the facts and circumstances that led to the impairment.
- The dollar amount of the loss and where it appears on the income statement, if not shown on a separate line.
- The method used to determine fair value, whether quoted market prices, comparable transactions, or a valuation model.
- The business segment the impaired asset belongs to, if the company reports by segment.
These disclosures appear in the notes to the financial statements and give investors the context behind the numbers.9Deloitte Accounting Research Tool. Disclosures Related to Recognition of an Impairment Loss
For publicly traded companies, the SEC goes further. Regulation S-K requires registrants to discuss known uncertainties about potential impairment charges in the Management Discussion and Analysis section of their filings, including the assumptions used, the sensitivity of fair value estimates, and the events that could lead to future charges. This disclosure obligation can kick in before any impairment is actually recorded.10Deloitte Accounting Research Tool. Impairment Disclosures
Downstream Consequences
Debt covenants are the most immediate risk. Loan agreements routinely include financial ratio requirements such as minimum net worth, maximum debt-to-equity, or minimum asset coverage. A large writedown shrinks total assets and equity simultaneously, which can push a company past a covenant threshold even though no cash was lost. A covenant violation can trigger loan acceleration, higher interest rates, or forced renegotiation at exactly the moment the company can least afford it.
Executive compensation tied to earnings metrics takes a hit as well. If bonuses or equity awards depend on earnings per share or return on assets, a material writedown can eliminate payouts for the period. That creates an incentive tension: managers may resist writing down assets until the evidence is overwhelming, which is precisely the delay regulators watch for.
The SEC has shown it will act when companies overstate asset values. In one case, the agency charged an advisory firm with fraud for overvaluing roughly 4,900 largely illiquid mortgage-backed securities, resulting in a $79.8 million settlement.11Securities and Exchange Commission. SEC Charges Advisory Firm Macquarie Investment Management Business Trust with Fraud Failing to recognize a required writedown isn’t just bad accounting. It can become a securities violation.