Guides
ASC 450: Accounting for Contingencies and Loss Reserves
ASC 450 is the FASB Accounting Standards Codification topic that governs how companies report contingencies, uncertain gains or losses that depend on a future event. It sets two questions for every loss contingency: how likely is the loss (probable, reasonably possible, or remote), and can the amount be reasonably estimated. The answers decide whether you accrue a reserve on the balance sheet, disclose the exposure in the footnotes, or do nothing. ASC 450 carries forward the framework of the old FAS 5 (1975) and splits into three subtopics: 450-10 (Overall), 450-20 (Loss Contingencies), and 450-30 (Gain Contingencies).
What ASC 450 covers
A contingency is an existing condition whose outcome, gain or loss, will be confirmed only when one or more future events occur or fail to occur. ASC 450-20 handles the loss side (litigation, product warranties, environmental cleanup, tax assessments, guarantees). ASC 450-30 handles the gain side (a pending lawsuit you expect to win, a claim for refund). The two sides are deliberately asymmetric: losses can hit the income statement before the matter settles, while gains generally wait until they are realized.
ASC 450 does not cover every uncertain estimate. Uncertain income tax positions run through ASC 740 income tax accounting, and expected credit losses on financial assets run through the CECL model, not the contingency model. ASC 450 applies to loss exposures that are contingent on a discrete future event, most commonly claims, assessments, and litigation.
The three likelihood thresholds
ASC 450 sorts every loss contingency into one of three probability bands, and the band drives the accounting. The standard defines the terms rather than assigning numeric percentages, so judgment (and often legal counsel) sets the classification.
- Probable: the future event or events are likely to occur. In practice many preparers treat this as roughly 70% or higher, though ASC 450 sets no bright-line percentage.
- Reasonably possible: the chance of the event occurring is more than remote but less than likely, the wide middle band.
- Remote: the chance of the event occurring is slight.
The classification is a point-in-time judgment that can move as facts develop. A lawsuit rated reasonably possible at year end can become probable after an adverse ruling, which may trigger accrual in a later period.
Accrue vs disclose: the recognition test
A company accrues a loss contingency (records an expense and a liability) only when both conditions in ASC 450-20-25-2 are met: it is probable that a liability had been incurred at the balance sheet date, and the amount of loss can be reasonably estimated. Meet both, and you book the reserve. Miss either one, and you move to disclosure. Meet neither and the exposure is remote, and you generally report nothing.
Two conditions, both required, is the core mechanic. Probable but not estimable means no accrual but disclosure of the contingency and a statement that an estimate cannot be made. Estimable but only reasonably possible means no accrual but disclosure of the nature of the contingency and an estimate of the possible loss or range, per ASC 450-20-50.
The recognition matrix
The table below maps likelihood against estimability to the required treatment. It is the fastest way to place any single contingency.
| Likelihood | Reasonably estimable | Not reasonably estimable |
|---|---|---|
| Probable | Accrue the loss and disclose (ASC 450-20-25-2). Record expense and liability. | Do not accrue. Disclose the nature and state that an amount cannot be estimated. |
| Reasonably possible | Do not accrue. Disclose the nature plus an estimate of the possible loss or range of loss. | Do not accrue. Disclose the nature and state that an estimate cannot be made. |
| Remote | No accrual and no disclosure required (guarantees are an exception and are still disclosed). | No accrual and no disclosure required. |
Measuring the reserve, including ranges
When the loss is probable and estimable, the company records the best estimate. If the estimate is a single point, that point is accrued. If the estimate is a range and no single amount within the range is a better estimate than the others, ASC 450-20-30-1 requires accruing the minimum of the range, not the midpoint and not the maximum. When exposure exists above the amount accrued, the company discloses that additional reasonably possible loss.
A worked example: a company faces litigation it judges probable to lose, with counsel estimating a loss between $4 million and $10 million and no point in that range more likely than another. The company accrues $4 million (the low end) and discloses that an additional loss of up to $6 million is reasonably possible. If instead $7 million were the best single estimate, it would accrue $7 million.
Litigation reserves in practice
Litigation is the highest-stakes application of ASC 450, and it draws the most scrutiny from auditors and the SEC. Companies rarely disclose a specific accrued amount for an active case, because naming a number can weaken their position with the opposing party. The standard permits accruing the reserve while keeping the case-specific figure out of the footnote, disclosing instead the nature of the matter and, where reasonably possible loss exists beyond the accrual, an estimate or range.
Auditors corroborate management’s litigation assessments through attorney letters (the audit inquiry to legal counsel under the ABA treaty), which ask counsel to confirm the list of pending matters and comment on the likelihood of unfavorable outcomes. ASC 450 also reaches unasserted claims: a probable assertion that would probably result in an unfavorable outcome must be evaluated the same way as a pending claim. Accruals are limited to losses tied to events occurring on or before the balance sheet date, so a suit filed after year end over a pre-year-end event is a subsequent-event judgment, not automatically a current-year accrual.
Gain contingencies: the conservative side
Gain contingencies under ASC 450-30 are not recognized until realized, because recognizing a gain before it is assured would risk reporting income that never arrives. A company that expects to win a lawsuit or collect an insurance recovery does not book the receivable and gain while the outcome is uncertain. The gain hits the income statement when realization is assured, typically when the case settles favorably or the claim is collected.
Disclosure of a gain contingency is allowed and often appropriate, but ASC 450-30-50-1 warns against wording that implies realization is more certain than it is. So a footnote can describe a pending favorable claim while making clear no gain has been recorded. This asymmetry, accrue probable losses early but defer gains until realized, is a direct expression of conservatism in U.S. GAAP.
ASC 450 and going concern
ASC 450 contingencies and the going-concern assessment are related but separate analyses. A large probable loss reserve, an adverse judgment, or a cluster of reasonably possible exposures can be evidence that feeds a going-concern evaluation, but the going concern assumption is judged under its own standard (ASC 205-40) over a one-year look-forward window. A company can have significant disclosed contingencies and still conclude that substantial doubt about continuing as a going concern does not exist, or the reverse. Preparers document each conclusion on its own footing.
Contingent consideration in a deal, such as an M&A earnout, is generally scoped out of ASC 450 and measured under the business-combination rules instead, another reminder that the contingency label alone does not decide the standard.
Frequently asked questions
What is the difference between probable, reasonably possible, and remote under ASC 450?
They are the three likelihood bands for a loss contingency. Probable means the event is likely to occur. Reasonably possible means the chance is more than remote but less than likely. Remote means the chance is slight. ASC 450 defines the terms in words, not fixed percentages, so classification is a judgment often informed by legal counsel and updated as facts change.
When must a company accrue a loss contingency?
A company accrues when both ASC 450-20-25-2 conditions are met: it is probable a liability existed at the balance sheet date, and the loss amount can be reasonably estimated. Both are required. If a loss is probable but not estimable, or estimable but only reasonably possible, the company discloses instead of accruing.
How do you record a loss when only a range is estimable?
Under ASC 450-20-30-1, if a range of loss is estimable and no single amount in the range is a better estimate than the others, the company accrues the minimum of the range. When the reasonably possible exposure exceeds the accrual, the company discloses that additional potential loss. If one point in the range is the best estimate, that point is accrued instead of the low end.
Are gain contingencies recognized under ASC 450?
No. ASC 450-30 defers gain contingencies until realization is assured, usually when a claim settles or is collected. A company may disclose an expected gain but must avoid language implying the outcome is more certain than it is. This is the opposite of the loss side, where probable and estimable losses are accrued before final settlement.
Why do companies avoid disclosing exact litigation reserve amounts?
Naming a case-specific accrual can undermine a company’s negotiating and legal position with the opposing party. ASC 450 lets a company record the reserve while disclosing only the nature of the matter and, where reasonably possible loss exists beyond the accrual, an estimate or range. Auditors still corroborate the underlying reserve through attorney inquiry letters.
Does ASC 450 apply to income tax uncertainties?
No. Uncertain tax positions are scoped out of ASC 450 and accounted for under ASC 740. Expected credit losses on financial assets follow the CECL model rather than the contingency model. ASC 450 targets loss exposures contingent on a discrete future event, such as litigation, claims and assessments, warranties, and environmental obligations.
Reviewed by The Ledgerism Editorial Team. Last reviewed: July 2026.