In 1901, Guy C. Earl, an attorney, and his wife executed a contract providing that any property either of them acquired thereafter—including salary, fees, and other earnings—would be held by them as joint tenants with right of survivorship. During the tax years at issue (1918 and 1919), Mr. Earl received compensation for legal services in the form of salary and fees. Relying on the 1901 agreement, he reported only one-half of those earnings as his income, asserting that the other half belonged to his wife ab initio. The Commissioner of Internal Revenue included all of the earnings in Mr. Earl's gross income. The Board of Tax Appeals sustained the Commissioner, but the Ninth Circuit reversed, concluding that the contract gave Mrs. Earl a present, vested interest in half the earnings, thereby limiting Mr. Earl's taxable share. The Supreme Court granted certiorari.
Can a taxpayer avoid federal income tax on personal earnings by entering into an anticipatory contract assigning one-half of those earnings to a spouse so that the income, when paid, belongs in part to the spouse from the outset?
Under the assignment-of-income doctrine for personal services, income is taxed to the person who earns it. Anticipatory arrangements and contracts—however skillfully devised—cannot shift the incidence of tax on compensation for services from the earner to another. As Justice Holmes stated, "the fruits cannot be attributed to a different tree from that on which they grew."
No. Income from personal services is taxable to the person who performed the services, notwithstanding a prior contract purporting to assign a portion of that income to another person, including a spouse.
The Court, per Justice Holmes, emphasized that the federal income tax statutes are designed to tax compensation to those who earn it. While the Earls' 1901 contract may have been valid and enforceable under state law between the spouses, it could not control the federal question of who is taxable on the income. Allowing taxpayers to divert salary by anticipatory agreements would frustrate the operation of the tax laws and open the door to widespread avoidance, merely by drafting instruments that cause payments to vest instantaneously, or even simultaneously, in someone other than the person who performed the work. Holmes rejected any formalistic distinction based on the timing or legal form of the arrangement, stressing substance over form: the economic reality was that the income arose from Mr. Earl's personal services and therefore must be taxed to him. The famous "fruit and tree" metaphor captured the point: one cannot reattribute the fruits (income) to a different tree (taxpayer) than the one from which they actually grew (the earner's labor). The Court thus reversed the Ninth Circuit and reinstated the Commissioner's determination taxing all of the earnings to Mr. Earl.
Lucas v. Earl is a cornerstone of federal tax doctrine. It firmly establishes that personal-service income cannot be diverted for tax purposes by private contracts or anticipatory assignments. The case also draws a critical distinction between (1) assigning income from labor (ineffective for tax shifting) and (2) transferring ownership of income-producing property itself (which can shift future income taxation to the transferee). Its principle was later extended to analogous contexts, such as gifts of interest coupons detached from bonds, and remains central to modern analyses distinguishing substance from form. For students, Lucas v. Earl is a touchstone for understanding income splitting, the limits of state-law arrangements in federal tax, and why later cases like Poe v. Seaborn (upholding community-property income splitting) are consistent: when state law vests a present ownership interest in income as it is earned, the tax follows ownership; when only an anticipatory assignment of earnings is made, the tax follows the earner.
Lucas v. Earl set the enduring baseline that compensation is taxed to the person who earns it, regardless of anticipatory efforts to split or divert that income by private agreement. By insisting that substance controls over form, the Court foreclosed a major pathway for income splitting and established a rule that promotes administrability and combats tax avoidance.