Realization (tax)
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Realization, for U.S. Federal income tax purposes, is a requirement in determining what must be included as income subject to taxation. It should not be confused with the separate concept of Recognition (tax).
Realization is a trigger for calculating income taxation. It is one of the three principles for defining income under the seminal case in this area of tax law, Commissioner v. Glenshaw Glass Co.[1] In that case, the Supreme Court interpreted a statute under the tax code and determined that income generally means "undeniable accessions to wealth, clearly realized, and over which the taxpayers have complete dominion." It is also discussed in Helvering v. Bruun, in which the court explained that "the realization of gain need not be in cash derived from the sale of an asset. Gain may occur as a result of exchange of property, payment of the taxpayer's indebtedness, relief from a liability, or other profit realized from the completion of a transaction."[2] That is a checklist of types of realization triggers, but it is not an exhaustive list. For instance, merely finding something of value can be a realization trigger, as the case of Cesarini v. United States demonstrates.[3][4]
In Cottage Savings Ass'n v. Commissioner, 499 U.S. 554, 559 (1991), the Supreme Court, interpreting section 1001(a) of the tax code, stated:
In order to avoid the cumbersome, abrasive, and unpredictable administrative task of valuing assets annually to determine whether their value has appreciated or depreciated, § 1001(a) of the Code defers the tax consequences of a gain or loss in property until it is realized through the "sale or disposition of [the] property." This rule serves administrative convenience because a change in the investment's form or extent can be easily detected by a taxpayer or an administrative officer.[5]