ASC 820 Fair Value Measurement Under US GAAP: Definition, Hierarchy and Disclosures

Fair value runs through US GAAP — in financial instruments, business combinations, impairment, and more — and ASC 820 defines what it means and how to measure it. It frames fair value as an exit price, ranks the inputs used to estimate it in a three-level hierarchy, and demands disclosure that varies with how observable those inputs are. This guide explains the fair value definition, the hierarchy, valuation techniques, and the disclosures.

How does ASC 820 define fair value?

ASC 820 defines fair value as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. Three features stand out. It is an exit price — what you would receive to sell, not what you paid to buy. It assumes an orderly transaction, not a forced sale or distress. And it is based on market participant assumptions, not the reporting entity’s own intentions, reflecting how the market would price the item.

This market-based, exit-price definition is a unifying concept applied wherever US GAAP requires or permits fair value measurement, from financial instruments to business combinations to impairment testing. It directs preparers to estimate what the market would pay or charge, considering the highest and best use for non-financial assets and the principal or most advantageous market. The definition is identical in substance to IFRS 13, reflecting the close coordination between the boards, and it provides a consistent foundation for fair value across the framework.

What is the fair value hierarchy?

ASC 820 establishes a three-level fair value hierarchy that ranks the inputs used in valuation by their observability, prioritising market-based evidence over entity-specific estimates. Level 1 inputs are quoted prices in active markets for identical assets or liabilities — the most reliable evidence, such as the price of a listed share. Level 2 inputs are other observable inputs, such as quoted prices for similar items, or observable interest rates and yield curves. Level 3 inputs are unobservable, reflecting the entity’s own assumptions where market data is unavailable.

The hierarchy matters because it drives both the reliability of the measurement and the extent of disclosure required. A measurement based on Level 1 inputs is highly reliable and lightly disclosed; a Level 3 measurement, relying on unobservable inputs and significant judgment, requires extensive disclosure including the valuation techniques, the significant unobservable inputs, and a reconciliation of opening and closing balances. The level into which a measurement falls is determined by the lowest-level input significant to the overall measurement.

What valuation techniques does ASC 820 permit?

ASC 820 identifies three widely used valuation approaches. The market approach uses prices and other relevant information from market transactions involving identical or comparable assets or liabilities, such as multiples derived from comparable companies. The income approach converts future amounts — cash flows or earnings — to a single present value, as in a discounted cash flow analysis. The cost approach reflects the amount required to replace the service capacity of an asset, its current replacement cost.

An entity selects the technique or techniques appropriate to the circumstances and for which sufficient data is available, maximising the use of relevant observable inputs and minimising unobservable ones. In some cases multiple techniques are used and the results weighed. The objective throughout is to estimate the price at which an orderly transaction would take place under current market conditions. The choice and application of valuation techniques is where much of the judgment in fair value measurement lies, particularly for Level 3 measurements without observable market prices.

How are liabilities and non-financial assets measured at fair value?

ASC 820 applies to liabilities as well as assets. The fair value of a liability reflects the price to transfer it to a market participant, assuming it continues (is not settled), and it incorporates the entity’s own non-performance risk, including its own credit risk — a sometimes counterintuitive consequence whereby a deterioration in an entity’s credit standing can reduce the fair value of its liabilities. Where no observable transfer price exists, the liability is often valued from the perspective of a market participant holding the corresponding asset.

For non-financial assets, fair value considers the highest and best use of the asset by market participants — the use that would maximise its value — which may differ from the entity’s current use. This means a non-financial asset is valued at what the market would pay considering its most valuable feasible use, in the principal or most advantageous market. These principles ensure fair value consistently reflects a market participant exit price across the different items to which it applies, mirroring the equivalent provisions in IFRS 13.

Why does the fair value hierarchy matter to users?

The fair value hierarchy is not just a disclosure mechanic; it tells users how much to trust the fair value figures. Level 1 measurements rest on observable market prices and are highly reliable. Level 3 measurements rest on the entity’s own unobservable assumptions and involve significant judgment, so they carry greater estimation uncertainty and more scope for management influence. A balance sheet heavy with Level 3 fair values warrants closer scrutiny of the assumptions behind them.

This is why ASC 820 requires the most extensive disclosures for Level 3 measurements, including the valuation techniques, the significant unobservable inputs, the sensitivity of the measurement to those inputs, and a reconciliation of movements during the period. For users analysing financial institutions and others with significant fair-valued positions, understanding the mix across the hierarchy is essential to assessing the reliability of reported values and the risk of future remeasurement. The hierarchy thus serves as a guide to the quality and uncertainty of the fair value numbers, a function it performs identically under IFRS 13.

How is fair value measured when markets are inactive?

One of the hardest aspects of fair value measurement arises when markets become inactive or disorderly, as in a financial crisis, when observable transaction prices may not represent fair value because they reflect forced or distressed sales. ASC 820 addresses this by clarifying that fair value remains the price in an orderly transaction, not a forced liquidation, and that in inactive markets an entity may need to adjust observable prices or rely more heavily on valuation models using other inputs to estimate the orderly-transaction price.

This requires significant judgment to distinguish orderly transactions from distressed ones and to determine when a market has become inactive. The guidance prevents fire-sale prices from automatically dictating fair value while maintaining the market-based exit-price objective. For entities holding instruments in markets that can seize up, understanding how ASC 820 applies in stressed conditions is important, because the measurement may shift from observable prices toward model-based estimates, increasing both judgment and the disclosure burden as measurements move down the hierarchy toward Level 3.

What disclosures does ASC 820 require?

ASC 820 requires disclosures that help users assess the valuation techniques and inputs used in fair value measurements and, for recurring Level 3 measurements, the effect of those measurements on earnings. For each class of asset and liability measured at fair value, entities disclose the fair value, the level of the hierarchy into which it falls, and the valuation techniques and inputs used. Transfers between levels are also disclosed, indicating changes in the observability of inputs.

The disclosures are most extensive for Level 3 measurements, where entities provide quantitative information about the significant unobservable inputs, a reconciliation of opening and closing balances showing gains, losses, purchases, sales, and transfers, and a description of the valuation processes and the sensitivity of the measurement to changes in unobservable inputs. These disclosures let users gauge the reliability and estimation uncertainty of fair value figures, and they are closely examined for financial institutions and others with significant Level 3 positions, mirroring the disclosure framework of IFRS 13.

Why is fair value so pervasive in US GAAP?

Fair value has become pervasive in US GAAP because it is used wherever a current, market-based measurement is judged more decision-useful than historical cost. Financial instruments are frequently measured at fair value, business combinations require fair-valuing acquired assets and liabilities, impairment testing uses fair value to measure losses, and many other areas reference it. ASC 820 provides the single, consistent definition and measurement framework that all these applications draw on, which is why understanding it underpins so much of US GAAP.

The spread of fair value reflects a broader shift in accounting toward measurements that capture current economic conditions rather than past transactions, particularly for assets and liabilities whose value changes with markets. This makes financial statements more current but also more volatile and more dependent on estimates, especially for Level 3 measurements. Understanding ASC 820 is therefore foundational, because fair value appears throughout the framework, and the reliability of many reported figures depends on how well fair value has been measured and disclosed, a foundation shared with IFRS 13 across the international framework.

How does fair value connect to the rest of US GAAP?

ASC 820 does not itself require anything to be measured at fair value; it defines how to measure fair value when other standards call for it. This makes it a foundational, cross-cutting standard that connects to financial instruments under ASC 320 and 321, business combinations under ASC 805, impairment under ASC 350 and 360, and many other areas. Wherever those standards require or permit fair value, they draw on the single definition, hierarchy, and measurement framework that ASC 820 provides, giving consistency across otherwise unrelated topics.

This connecting role means that understanding ASC 820 unlocks a great deal of the rest of US GAAP, because the same fair value concepts recur throughout. The quality of fair value measurement affects the reliability of acquisition accounting, impairment charges, and the carrying amounts of financial instruments alike. For finance professionals, fair value is therefore not a niche topic but a thread running through the framework, and mastering ASC 820 pays off across every area that relies on it, a cross-cutting importance it shares with IFRS 13 in the international framework covered in our IFRS hub.

Frequently Asked Questions