Moore v. United States: What the Mandatory Repatriation Tax Decision Held

Read the source decision or official guidance.

U.S. owners of foreign corporations can face tax consequences even when earnings remain inside the company. In Moore v. United States, the Supreme Court considered a constitutional challenge to the Mandatory Repatriation Tax enacted in 2017.

The Court upheld the tax as applied to the Moores, but repeatedly described the question as narrow. The decision should not be summarized as approving every hypothetical wealth tax or every possible tax on unrealized appreciation.

What was the Mandatory Repatriation Tax?

Before the 2017 legislation, some American-controlled foreign corporations accumulated earnings abroad that generally were not taxed to U.S. shareholders until distributed. The MRT attributed specified accumulated earnings to U.S. shareholders and imposed a one-time tax subject to statutory rules and rates.

Charles and Kathleen Moore challenged the tax on their share of earnings from an Indian corporation, arguing that the Sixteenth Amendment requires income to be realized by the taxpayer.

The Supreme Court’s limited holding

The majority reasoned that the foreign corporation had realized income and that Congress has a longstanding power to attribute an entity’s realized but undistributed income to its owners and tax them on their shares. On that basis, the MRT did not exceed Congress’s constitutional authority.

The Court stated that it was not deciding whether Congress may tax appreciation that no person or entity has realized. It also did not authorize taxing the same undistributed income both to an entity and its shareholders. Separate opinions debated realization more broadly, but those discussions should not be mistaken for the Court’s holding.

Practical implications

People with interests in foreign corporations, partnerships, and pass-through entities should not assume that lack of a cash distribution means no current U.S. reporting or tax consequence. The governing rules may involve Subpart F, global intangible low-taxed income, section 965, information returns, foreign-tax credits, and treaty questions.

Records to organize

• ownership percentages and acquisition dates;
• entity financial statements and earnings history;
• foreign and U.S. tax returns;
• distributions and shareholder loans;
• previously taxed earnings records; and
• Forms 5471 or other international information returns.

Key takeaways

• Moore upheld the MRT as applied to attributed, realized entity income.
• The decision was narrow and did not decide every realization or wealth-tax question.
• Undistributed foreign earnings may still create U.S. tax and reporting duties.
• International tax analysis requires entity-specific records and current statutory guidance.

Mishra X Trial Lawyers advises on selected tax legal matters. Call (949) 343-9735 or email office@mishrax.com.