Helvering v. Horst, 311 U.S. 112 (1940) (Supreme Court of the United States)
Helvering v. Horst is a cornerstone of the federal income tax assignment-of-income doctrine.
Whether a taxpayer who owns income-producing property but gives away the right to receive future income from that property—while retaining ownership of the property itself—is taxable on the income received by the donee.
Under the assignment-of-income doctrine, a taxpayer who retains ownership of income-producing property cannot avoid taxation by assigning or directing the payment of the income derived from that property to another. The power to dispose of income and to command its payment is, for income tax purposes, the equivalent of ownership and realization of that income. By contrast, when a taxpayer transfers the underlying property (the income-producing source) itself, the subsequent income is taxable to the transferee.
Yes. The donor remained taxable on the interest income from the coupons, notwithstanding his gift of the coupons to his son, because he retained ownership of the bonds and exercised dominion over the income by directing its payment to another.
Helvering v. Horst is the leading case on assignment of income from property, complementing Lucas v. Earl's treatment of assigned earnings. It teaches that income tax follows command over and enjoyment of economic gain, not formal title to the income at the moment of receipt. The case draws a crucial line: assigning only the right to receive income (the fruit) does not shift tax, but assigning the underlying income-producing property (the tree) generally does. Horst is foundational for understanding anticipatory assignment, modern anti-avoidance norms, and the policy motivations that shape federal income tax doctrine.