Moore v. United States
Case Overview
The Supreme Court held 7-2 that the Mandatory Repatriation Tax, which taxes accumulated but undistributed earnings of controlled foreign corporations as income of their U.S. shareholders, does not violate the Sixteenth Amendment, declining to resolve whether the Constitution requires income realization before Congress may impose a tax. Justice Kavanaugh wrote for the majority; Justices Thomas and Gorsuch dissented.
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The Facts
Charles and Kathleen Moore held a minority stake in an Indian manufacturing corporation and had never received dividends or distributions from it; under the Mandatory Repatriation Tax enacted in the Tax Cuts and Jobs Act of 2017, they were required to pay approximately $15,000 in taxes on their share of the corporation's accumulated earnings. The Moores challenged the MRT as exceeding Congress's Sixteenth Amendment authority because the attributed earnings had never been realized or distributed to them personally.
The Application
The Court upheld the MRT's taxation of the Moores by characterizing attributed foreign corporate earnings as a realized income stream within the Sixteenth Amendment's broad taxing authority, rather than as unrealized personal gains. Although the Moores had received no distributions and argued the earnings were therefore unrealized, the majority's framework treated corporate-level income as "realized" within the corporation and properly attributable to shareholders consistent with longstanding federal tax practices governing pass-through entities and foreign corporations. The decision thus sustained the MRT without requiring actual distribution to the Moores, but its narrow holding left open the larger constitutional question of whether the Sixteenth Amendment contains a categorical realization requirement that would limit taxation of unrealized individual capital gains in other contexts.
The Conclusion
**The Mandatory Repatriation Tax is constitutional as applied to U.S. shareholders in controlled foreign corporations, preserving existing corporate attribution and pass-through taxation regimes.** The Court left open whether the Sixteenth Amendment contains a categorical realization requirement that would limit Congress's authority to tax unrealized individual gains in other contexts. The narrow holding forecloses the Moores' challenge without resolving that larger constitutional question.
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Case Analysis
Facts
Charles and Kathleen Moore held a minority stake in an Indian manufacturing corporation and had never received dividends or distributions from it; under the Mandatory Repatriation Tax enacted in the Tax Cuts and Jobs Act of 2017, they were required to pay approximately $15,000 in taxes on their share of the corporation's accumulated earnings. The Moores challenged the MRT as exceeding Congress's Sixteenth Amendment authority because the attributed earnings had never been realized or distributed to them personally.
Issue
Whether the Sixteenth Amendment requires that income be realized before Congress may tax it, and whether the Mandatory Repatriation Tax, which attributes undistributed foreign corporate earnings to U.S. shareholders and taxes those shareholders on that income, therefore exceeds congressional taxing authority, with the Moores arguing realization is a constitutional prerequisite and the government arguing Congress may tax attributed corporate income without requiring formal distribution.
Rule
The Sixteenth Amendment grants Congress power to tax incomes from whatever source derived without apportionment; the majority held that the MRT taxes a realized stream of corporate income attributed to shareholders, consistent with longstanding attribution-based taxation practices, and declined to resolve whether the Sixteenth Amendment contains a categorical realization requirement applicable to all future taxes on unrealized gains.
Analysis
The Court upheld the MRT's taxation of the Moores by characterizing attributed foreign corporate earnings as a realized income stream within the Sixteenth Amendment's broad taxing authority, rather than as unrealized personal gains. Although the Moores had received no distributions and argued the earnings were therefore unrealized, the majority's framework treated corporate-level income as "realized" within the corporation and properly attributable to shareholders consistent with longstanding federal tax practices governing pass-through entities and foreign corporations. The decision thus sustained the MRT without requiring actual distribution to the Moores, but its narrow holding left open the larger constitutional question of whether the Sixteenth Amendment contains a categorical realization requirement that would limit taxation of unrealized individual capital gains in other contexts.
Conclusion
**The Mandatory Repatriation Tax is constitutional as applied to U.S. shareholders in controlled foreign corporations, preserving existing corporate attribution and pass-through taxation regimes.** The Court left open whether the Sixteenth Amendment contains a categorical realization requirement that would limit Congress's authority to tax unrealized individual gains in other contexts. The narrow holding forecloses the Moores' challenge without resolving that larger constitutional question.
Notes
OT2023. Added via SCOTUS bulk import 2026-05-14
Overview
The Supreme Court held 7-2 that the Mandatory Repatriation Tax, which taxes accumulated but undistributed earnings of controlled foreign corporations as income of their U.S. shareholders, does not violate the Sixteenth Amendment, declining to resolve whether the Constitution requires income realization before Congress may impose a tax. Justice Kavanaugh wrote for the majority; Justices Thomas and Gorsuch dissented.
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