Under U.S. GAAP, long-lived asset impairment under ASC 360 is tested only when a triggering event suggests the carrying amount may not be recoverable, and the test itself runs in two steps: first a screen comparing carrying amount to undiscounted future cash flows, and if the group fails that screen, a write-down to fair value. The Financial Accounting Standards Board governs the process through ASC 360-10, which applies to tangible property, plant, and equipment and to finite-lived intangible assets. Getting the mechanics wrong can lead to restated financials, audit qualifications, or SEC enforcement, so the details matter.
What ASC 360 Covers
ASC 360-10 applies to long-lived assets a company holds and uses in operations for more than one year. The typical examples are buildings, manufacturing equipment, leasehold improvements, and infrastructure. Finite-lived intangibles fall in scope as well, including patents with expiration dates, licensed technology, and acquired customer relationships with defined contractual terms.
Several major asset categories sit outside this framework. Goodwill and indefinite-lived intangible assets are tested under ASC 350 on an annual cycle rather than the event-driven approach here. Financial instruments, inventory, and deferred tax assets each have their own valuation rules. Assets classified as held for sale leave the held-and-used model entirely and shift to a different measurement basis.
Defining the Asset Group and the Primary Asset
Testing usually does not happen at the individual asset level. It happens at the asset group, defined as the lowest level at which identifiable cash flows are largely independent of other asset groups. That might be a single specialized machine producing a distinct revenue stream, or an entire production line including the building, equipment, and related intangibles that together generate cash flows.
Every asset group has a primary asset, and the primary asset drives the projection period used in the recoverability test. It is the most significant depreciable tangible asset or amortizable intangible asset from which the group derives its cash-generating capacity. Land and indefinite-lived intangible assets cannot serve as the primary asset. In identifying which asset qualifies, consider whether the other assets would have been acquired without it, what it would cost to replace, and how its remaining useful life compares to the rest of the group.
The primary asset’s remaining useful life sets the horizon for projected cash flows. If it has seven years left, the cash flow model spans seven years. When the primary asset does not have the longest remaining life in the group, the model must assume the group will be sold at the end of that life, and the estimated proceeds from that hypothetical sale are included as a terminal cash flow.
Triggering Events That Require Testing
Long-lived assets under ASC 360 are not tested on a fixed annual schedule. Testing is triggered by events or changes in circumstances suggesting the carrying amount may not be recoverable, and companies are expected to monitor continuously rather than wait for a scheduled review.
ASC 360-10-35-21 identifies several categories of triggering events:
- A significant decline in the market price of the asset or asset group.
- A change in use or physical condition, such as a factory being idled, a production line repurposed, or physical damage to a major asset.
- Adverse legal or regulatory changes, including new environmental rules, zoning restrictions, or regulatory action that limits operational capacity or economic value.
- Accumulated construction or acquisition costs significantly in excess of original expectations.
- A current-period operating or cash flow loss combined with a history of losses or a forecast showing continued losses for the asset group.
- A current expectation that the asset will more likely than not be sold or disposed of well before the end of its previously estimated useful life.
The operating loss trigger catches companies most often, especially in downturns. A single bad quarter may not be enough, but combined with a pattern of losses or a forward-looking forecast showing continued deficits, the case for testing becomes difficult to avoid. Auditors scrutinize this indicator aggressively because management has an incentive to characterize losses as temporary.
Step 1: The Recoverability Test
Once a triggering event is identified, the first step compares the carrying amount of the asset group to the sum of the undiscounted future cash flows expected from using the assets and eventually disposing of them. The comparison deliberately ignores the time value of money. No discount rate is applied. The raw projected amounts for each future year are simply added together.
If undiscounted cash flows exceed the carrying amount, the asset group passes. No impairment is recorded, even if current fair value sits below book value. This differs sharply from the goodwill model. The undiscounted screen acts as a high bar, preventing companies from writing down assets they intend to keep using because of what may be a temporary market dip.
If the carrying amount exceeds the undiscounted cash flows, the group fails, is deemed unrecoverable, and moves to Step 2.
When Probability-Weighted Cash Flows Are Required
In a stable operating environment, companies typically build the recoverability test around a single best estimate. But when the company is considering alternative courses of action for the asset group, or when the range of possible outcomes is wide, ASC 360-10-35-30 requires a probability-weighted approach. Each scenario receives a probability, and the weighted average becomes the cash flow figure used in the test.
This matters more than it might seem. During periods of economic uncertainty, using a single optimistic scenario to pass the recoverability test is a red flag for auditors. If genuinely different paths forward exist, the probability-weighted approach gives a more honest picture and is harder to challenge.
Step 2: Measuring the Impairment Loss
When an asset group fails Step 1, the impairment loss equals the amount by which the carrying value exceeds fair value. Fair value follows the hierarchy in ASC 820, which organizes valuation inputs into three tiers based on observability: quoted prices in active markets for identical assets, observable data for similar assets, and unobservable inputs based on the company’s own assumptions.
For most industrial equipment and specialized real property, Level 1 quoted prices simply do not exist. There is no active market for a custom-built chemical processing unit. Companies end up relying on Level 3 discounted cash flow models, which means the same projected cash flows that failed the undiscounted screen in Step 1 now get discounted at an appropriate risk-adjusted rate to produce a fair value. Independent appraisals or broker opinions can supply Level 2 support, though the cost and lead time for professional equipment appraisals can be substantial.
Allocating the Loss Within the Group
Once the total impairment loss is calculated, it is distributed among the individual long-lived assets in the group on a pro-rata basis using each asset’s relative carrying amount. If a building represents 60% of the group’s total book value and a machine represents 40%, the building absorbs 60% of the loss and the machine absorbs 40%.
One constraint governs the allocation. It cannot reduce any individual asset below its own determinable fair value. If a pro-rata share would push an asset below its standalone fair value, that asset’s write-down stops at fair value and the excess is redistributed among the remaining assets. This floor applies only when the individual asset’s fair value can be determined without undue cost and effort. In practice, the constraint often protects land within the group, since land frequently has a readily determinable market value.
The loss reduces only long-lived assets within the group. Current assets and liabilities included in the group for cash flow estimation purposes are not written down as part of this allocation.
The New Basis and the No-Reversal Rule
After the impairment is recorded, the written-down amount becomes the asset’s new cost basis for all future accounting. Depreciation or amortization must be recalculated over the remaining useful life using this lower starting point. A machine that originally cost $10 million, was carried at $7 million after accumulated depreciation, and was impaired to $4 million now depreciates from $4 million over whatever useful life remains.
The reversal prohibition is absolute. Once an impairment loss is recognized on a long-lived asset held and used, it cannot be reversed in any future period, no matter how much value the asset recovers. If the market rebounds or the group starts generating strong cash flows again, the books stay at the impaired value. Recovery shows up only through lower depreciation charges going forward or a gain on eventual sale. This is one of the sharpest differences between U.S. GAAP and IFRS, which requires reversal of prior impairment on non-goodwill assets when indicators suggest the loss has decreased.
When the Asset Is Being Sold Rather Than Used
A held-and-used impairment analysis no longer applies once an asset qualifies as held for sale. Under ASC 360-10-45-9, all six of the following criteria must be met for reclassification:
- Management with authority to approve has committed to a plan to sell.
- The asset is available for immediate sale in its present condition, subject only to customary terms.
- An active program to find a buyer has begun.
- The sale is probable and expected within twelve months.
- The asset is actively marketed at a price reasonable in relation to its current fair value.
- Significant changes to the plan or its withdrawal are unlikely.
Once classified as held for sale, the asset is measured at the lower of carrying amount or fair value less cost to sell. Costs to sell include only incremental direct transaction costs like broker commissions, legal fees, and title transfer costs. Depreciation and amortization stop immediately upon reclassification. If fair value less cost to sell declines further, an additional loss is recognized. If it increases, a gain can be recognized, but only up to the cumulative losses previously recorded after the held-for-sale classification.
A Simple Numerical Example
A manufacturing company operates a production line with a total carrying amount of $12 million. The group includes a building carried at $5 million, specialized equipment at $6 million, and a patent at $1 million. The equipment is the primary asset with four years of remaining useful life.
A triggering event occurs when the company loses a major customer that accounted for most of the line’s output. Management projects undiscounted cash flows of $10 million over the remaining four years. Since $10 million falls short of the $12 million carrying amount, the group fails the recoverability test.
The company then determines fair value using a discounted cash flow model, arriving at $8 million. The impairment loss is $4 million, the difference between the $12 million carrying amount and $8 million fair value. That loss is allocated pro rata across the long-lived assets based on relative book values: roughly $1.67 million to the building, $2 million to the equipment, and $333,000 to the patent, subject to the constraint that no asset is written below its own determinable fair value. The total carrying amount resets to $8 million, and future depreciation is based on these new values over the remaining useful lives.
Financial Statement Disclosures
When an impairment loss is recorded, ASC 360-10-50-2 requires specific footnote disclosures for the period:
- A description of what was impaired and the facts and circumstances that led to the write-down.
- The dollar amount of the loss, and the income statement line where it appears if not separately presented.
- How fair value was determined, whether through quoted market prices, comparable transactions, or a valuation model.
- The reportable segment that includes the impaired asset, for companies reporting segment information.
When fair value is measured using Level 3 inputs, disclosure requirements expand under ASC 820. Companies must describe the valuation techniques used, identify the significant unobservable inputs, and provide quantitative detail such as discount rates and growth rate assumptions. If the asset’s highest and best use differs from its current use, that fact must be disclosed and explained.
Beyond the footnotes, ASC 275 requires disclosure of potential future impairment losses when the possibility is reasonably likely to occur in the near term and the impact would be material. This forward-looking requirement is where many companies stumble. Auditors and regulators expect management to flag asset groups close to failing the recoverability test, not only those that already have.
SEC Reporting Obligations for Public Companies
Public companies face additional obligations when a material impairment charge is determined. Under Item 2.06 of Form 8-K, a current report must be filed within four business days of concluding that a material impairment charge is required under GAAP.1U.S. Securities and Exchange Commission. Form 8-K The filing must include the date the conclusion was reached, a description of the impaired assets and circumstances, the estimated amount or range of the charge, and how much of the charge will result in future cash expenditures.
If a good-faith estimate is not available at the time of filing, the amount can initially be omitted, but an amended Form 8-K must be filed within four business days after the estimate is determined.1U.S. Securities and Exchange Commission. Form 8-K An exception applies to impairment conclusions reached during the normal preparation of financial statements for a periodic report. If the conclusion arises during the audit or review process and the next 10-K or 10-Q is filed on time with the impairment disclosed, a separate 8-K is not required.
SEC staff also expect registrants to provide early-warning disclosures in Management’s Discussion and Analysis when known uncertainties create a material risk of future impairment. Waiting until the charge is inevitable to mention it for the first time is the kind of disclosure failure that draws SEC comment letters.
Deferred Tax Consequences
A GAAP impairment charge reduces an asset’s book basis but does not change its tax basis. Tax depreciation continues based on the original cost and the applicable tax depreciation schedule. This creates a deductible temporary difference: book value is now lower than tax value, meaning larger tax deductions in future periods than book depreciation expense.
The result is a deferred tax asset equal to the temporary difference multiplied by the applicable tax rate. If a company impairs an asset by $4 million and its effective tax rate is 25%, the impairment creates a $1 million deferred tax asset. That deferred tax asset reverses over the remaining depreciable life as tax depreciation exceeds book depreciation each year.
Whether the deferred tax asset actually reduces the impact of the impairment on the income statement depends on realizability. If the company is already in a cumulative loss position or lacks sufficient future taxable income to use the tax benefit, part or all of the deferred tax asset may need to be offset by a valuation allowance, reducing or eliminating the tax benefit that the impairment would otherwise generate.