Glossary/Accounting and GAAP

Business combination

A business combination is a transaction in which an acquirer obtains control of a business, accounted for under ASC 805 using the acquisition method at fair value.

CORAA TeamUpdated November 5, 2026

Definition

A business combination occurs when an acquirer obtains control of one or more businesses. A business is an integrated set of activities and assets that includes at least an input and a substantive process that together significantly contribute to the ability to create outputs. A screen treats a set as an asset acquisition when substantially all of the fair value of the gross assets is concentrated in a single identifiable asset or group of similar identifiable assets. ASC 805 requires the acquisition method: identify the acquirer, determine the acquisition date, recognize identifiable assets acquired and liabilities assumed at fair value, recognize any noncontrolling interest, and recognize goodwill or a bargain purchase gain. Acquisition-related costs are expensed as incurred.

Why it matters in an audit or review

Auditors test the fair value of consideration, contingent consideration, and the allocation, often with a valuation specialist. The measurement period allows adjustments for up to one year. Disclosures describe the acquisition and the purchase price allocation.

Example

(Illustrative) A company pays $5.0 million for a business with identifiable net assets at fair value of $3.8 million. Goodwill is $1.2 million. $150,000 of legal fees are expensed.

Common mistakes

  • Capitalizing deal costs into goodwill.
  • Treating an asset purchase as a business combination.

Sources

  • FASB ASC 805-10, Business Combinations, Overall (including the definition of a business and the measurement period)
  • FASB ASC 805-20, Identifiable assets, liabilities and noncontrolling interest
  • FASB ASC 805-30, Goodwill or a gain from a bargain purchase
  • FASB ASU 2017-01, Clarifying the Definition of a Business

Definitions paraphrase AICPA and FASB guidance; read the standard itself before relying on a requirement. Example figures are illustrative. This page is guidance, not professional advice. Report an error

Standards

ASC 805

Related terms

  • Purchase price allocation
    Purchase price allocation assigns the consideration transferred in an acquisition to identifiable assets and liabilities at fair value, with any remainder recorded as goodwill under ASC 805.
  • Bargain purchase gain
    A bargain purchase gain arises when the fair value of net identifiable assets acquired exceeds consideration transferred, recognized in earnings only after the acquirer reassesses its identification and measurement.
  • Goodwill impairment testing
    Goodwill is tested for impairment at the reporting unit level under ASC 350, comparing fair value with carrying amount, while private companies may elect to amortize goodwill and test only on triggering events.
  • Consolidated vs combined financial statements
    Consolidated statements present a parent and its controlled subsidiaries as one entity, while combined statements aggregate commonly controlled or managed entities that lack a parent-subsidiary relationship.

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