Under most major accounting frameworks, periodic impairment assessment is required for a small set of asset types and for other assets when indicators of impairment appear. Authoritative guidance comes from the Financial Accounting Standards Board FASB in the United States and the International Accounting Standards Board IASB internationally, and academic analysis such as Mary E. Barth Stanford Graduate School of Business provides research-based context for how those rules affect reporting and valuation.
Standards and account types that require periodic testing
The principal asset categories that receive mandated periodic impairment scrutiny are goodwill and indefinite-lived intangible assets. Under US GAAP guidance in Accounting Standards Codification ASC 350 Goodwill and Other goodwill and certain indefinite-lived intangibles are subject to at least annual impairment assessment and more frequently when triggering events occur. Under IFRS IAS 36 Impairment of Assets the same asset classes require annual testing. Other asset classes such as long-lived tangible assets and finite-lived intangible assets are subject to impairment testing when there is evidence of possible impairment rather than on a fixed annual schedule. Assets classified as held for sale have specific measurement and impairment rules at the date of classification. Separate models apply to financial assets, where credit-loss frameworks such as the Current Expected Credit Loss model under US GAAP ASC 326 and the expected credit loss approach under IFRS 9 require periodic measurement of expected losses for loans and debt instruments.
Causes, relevance, and consequences
Impairment arises when carrying amounts exceed recoverable amounts because of market declines, operational deterioration, adverse legal or regulatory changes, environmental events, or geopolitical disruptions that affect cash flows tied to an asset. The relevance to users is direct: impairment recognition affects reported earnings, asset base, key ratios, and in some cases debt covenant compliance. Consequences include earnings volatility, reduced book value, and potentially impaired stakeholder trust when management judgment plays a large role. Academic work by Mary E. Barth Stanford Graduate School of Business highlights how valuation methods and managerial incentives shape impairment timing and disclosure, underscoring the importance of transparent methodology.
Jurisdictional and human nuances
Practice varies by jurisdiction in measurement approach and disclosures, and cultural norms around conservatism and management incentives can influence how aggressively impairments are identified. Environmental and territorial risks such as natural disasters or political instability often trigger more frequent reassessments, and good governance and audit scrutiny can mitigate biased reporting. Impairment testing is both a technical accounting requirement and a window into a reporting entity’s economic reality and governance.