5.1 Measuring Goodwill
The ASC master glossary, as amended by ASU 2023-05, defines goodwill as “[a]n
                asset representing the future economic benefits arising from other assets acquired
                in a business combination, acquired in an acquisition by a not-for-profit entity, or
                recognized by a joint venture upon formation that are not individually identified
                and separately recognized.” Because goodwill is not a separately identifiable asset,
                it cannot be measured directly. It is therefore measured as a residual and
                calculated as the excess of the sum of (1) the consideration transferred, (2) the
                fair value of any noncontrolling interest in the acquiree, and (3) the fair value of
                the acquirer’s previously held equity interest in the acquiree over the net of the
                acquisition-date values of the identifiable assets acquired and the liabilities
                assumed.
Occasionally, the sum of (1) through (3) above is less than the net of the
                acquisition-date values of the identifiable assets acquired and the liabilities
                assumed. In such a case, the acquirer recognizes a gain, referred to as a bargain
                purchase gain, in earnings on the acquisition date. Conceptually, goodwill
                represents both the fair values of the going-concern element of the acquired
                business and the expected synergies of combining the acquirer’s and acquiree’s
                businesses. However, because goodwill is measured as a residual, it includes other
                components as well.
One such component is the difference between the fair values and the amounts at
                which items that are exceptions to the recognition and measurement principles are
                recognized. ASC 805 requires entities to measure most assets, liabilities, equity
                interests, and items of consideration exchanged in a business combination at their
                fair values as of the acquisition date. However, some items exchanged in a business
                combination are exceptions to the recognition or measurement principle (or both) and
                are therefore either recognized or measured in accordance with other guidance or not
                recognized or measured at all.
For example, income taxes are measured in accordance with ASC 740 rather than at
                fair value, and preacquisition contingencies are often unrecognized in a business
                combination. Nonrecognition of items or recognition of items at amounts other than
                fair value either increases or decreases goodwill. Accordingly, while the FASB
                strived to reduce the number of exceptions to the fair value and recognition
                principles in ASC 805, exceptions still exist.
Another component of goodwill is overpayments. In paragraph B382 of the Basis for Conclusions of Statement 141(R), the FASB “acknowledged that overpayments are possible and, in concept, an overpayment should lead to the acquirer’s recognition of an expense (or loss) in the period of the acquisition.” However, the Board noted that “in practice any overpayment is unlikely to be detectable or known at the acquisition date [and] is best addressed through subsequent impairment testing when evidence of a potential overpayment first arises.” Underpayments, however, are not a component of goodwill because ASC 805-30 requires entities to recognize a bargain purchase as a gain in earnings on the acquisition date (see Section 5.2).
ASC 805-30 provides the following guidance on measuring goodwill:
ASC 805-30
30-1 The acquirer shall recognize goodwill as of the acquisition date, measured as the excess of (a) over (b):
- The aggregate of the following:- The consideration transferred measured in accordance with this Section, which generally requires acquisition-date fair value (see paragraph 805-30-30-7)
- The fair value of any noncontrolling interest in the acquiree
- In a business combination achieved in stages, the acquisition-date fair value of the acquirer’s previously held equity interest in the acquiree.
 
- The net of the acquisition-date amounts of the identifiable assets acquired and the liabilities assumed measured in accordance with this Topic.
In some business combinations, the acquirer obtains a controlling financial interest but less than
100 percent of the equity interests in the acquiree. Such acquisitions, referred to as partial acquisitions,
require the acquirer to include the fair value of the noncontrolling interest in the measurement of
goodwill. See Section 6.4 for more information about the accounting for partial acquisitions.
In other business combinations, an acquirer obtains a controlling financial
                interest in an acquiree in which it held a noncontrolling equity interest
                immediately before the acquisition date. For example, an acquirer may hold a 25
                percent noncontrolling equity interest in a business and then acquire an additional
                equity interest, giving it control of the business. ASC 805 refers to such an
                acquisition as a business combination achieved in stages, which is also commonly
                referred to as a step acquisition. In a step acquisition, the acquirer must also
                include the fair value of its previously held interest in the goodwill calculation.
                See Section 6.5 for
                more information about the accounting for step acquisitions.
Once recognized, goodwill is tested for impairment in accordance with ASC
                350-20, which also provides an accounting alternative for the subsequent accounting
                for goodwill for entities that do not meet the definition of a public business
                entity (PBE) or are not-for-profit entities. Such entities may elect to amortize
                goodwill acquired in a business combination and to use a simplified, one-step
                impairment test. See Chapter
                    8 for more information about accounting alternatives available to
                private companies and not-for-profit entities.