ASC 805 — Business Combinations is the U.S. GAAP standard (issued by the FASB, formerly SFAS 141R) that governs how an acquirer accounts for buying a business. Like its IFRS counterpart IFRS 3, it requires the acquisition method and is the authority for purchase price allocation and goodwill recognition under U.S. GAAP. The two standards were largely converged through a joint FASB-IASB project in 2008, though some differences remain.
The acquisition method
ASC 805 applies the same four-step acquisition method as IFRS 3:
- Identify the acquirer (who obtains control).
- Determine the acquisition date.
- Recognize and measure identifiable assets acquired and liabilities assumed at fair value — including identifiable intangibles previously unrecorded by the target.
- Recognize goodwill as the residual (or a bargain-purchase gain if negative).
Deal costs are expensed, contingent consideration is recorded at fair value, and provisional figures can be revised during the measurement period.
Where ASC 805 differs from IFRS 3
Although converged, a few differences matter in practice:
- Non-controlling interest (NCI). ASC 805 generally requires NCI to be measured at fair value ("full goodwill"), whereas IFRS 3 offers a choice between full goodwill and the proportionate-share method.
- Goodwill impairment model. U.S. GAAP tests goodwill at the reporting-unit level using a single-step quantitative test (since ASU 2017-04: impairment = carrying amount − fair value of the reporting unit). IFRS uses IAS 36's recoverable-amount test at the cash-generating-unit level. The frameworks can produce different impairment outcomes.
- Definitions and detail differ in places (e.g., definition of a "business," certain contingencies).
The private-company alternatives
A distinctive U.S. feature is the set of FASB private-company accounting alternatives that ease the burden for non-public companies:
- Amortize goodwill straight-line over up to 10 years (rather than only testing for impairment) — reducing cost and earnings volatility; and
- Subsume certain customer-related intangibles and non-compete agreements into goodwill rather than valuing them separately.
These elections make acquisition accounting simpler and cheaper for private acquirers, and are widely used in PE and middle-market deals.
Why it matters
For any U.S. acquirer (public or private), ASC 805 dictates how a deal lands on the balance sheet and future income statement — how much becomes amortizing intangibles, how much non-amortizing goodwill, and how deferred taxes are set up. Those choices shape reported earnings for years after close, making ASC 805 a core consideration for the deal accountants who handle post-close PPA.
See also
- IFRS 3 — Business Combinations — The IFRS standard governing the accounting treatment of business combinations, including the acquisition method, goodwill recognition and post-acquisition reporting.
- Goodwill — The intangible asset recorded when a buyer pays more than the fair value of net assets.
- Purchase price allocation — The process of assigning an acquisition’s price to the assets and liabilities acquired.
- Intangible assets in M&A — Identifiable non-physical assets — customer relationships, brands, technology, contracts — recognised separately from goodwill in purchase price allocation.
- Goodwill impairment — A write-down of goodwill when its carrying amount exceeds its recoverable amount. Tested at least annually under both IFRS and U.S. GAAP.
- Measurement-period adjustments — Adjustments to provisional acquisition-accounting amounts within a one-year window after acquisition, as new information about facts existing at acquisition date emerges.