Supreme Court upholds a tax on foreign income over a challenge backed by business interests

The law, passed by a Republican Congress and signed by then-President Donald Trump, includes a provision that applies to companies that are owned by Americans but do their business in foreign countries. It imposes a one-time tax on investors' shares of profits that have not been passed along to them, to offset other tax benefits.

But the larger significance of the ruling is what it didn't do. The case attracted outsize attention because some groups allied with the Washington couple who brought the case argued that the challenged provision is similar to a wealth tax, which would apply not to the incomes of the very richest Americans but to their assets, like stock holdings. Such assets now get taxed only when they are sold.

Justice Brett Kavanaugh wrote in his majority opinion that "nothing in this opinion should be read to authorize any hypothetical congressional effort to tax both an entity and its shareholders or partners on the same undistributed income realized by the entity."

Underscoring the limited nature of the court's ruling, Kavanaugh said as he read a summary of his opinion in the courtroom, "the precise and very narrow question" of the 2017 law "is the only question we answer."

The court ruled in the case of Charles and Kathleen Moore, of Redmond, Washington. They challenged a $15,000 tax bill based on Charles Moore's investment in an Indian company, arguing that the tax violates the 16th Amendment. Ratified in 1913, the amendment allows the federal government to impose an income tax on Americans. Moore said in a sworn statement that he never received any money from the company, KisanKraft Machine Tools Private Ltd.

But Kavanaugh said the tax the Moores disputed was akin to other taxes, including those on foreign-earned income and partnerships. A ruling for the Moores could have called into question those other provisions of the tax code and threatened losses to the U.S. Treasury of several trillion dollars, Kavanaugh noted, echoing the argument made by the Biden administration.

Justice Clarence Thomas, joined by Justice Neil Gorsuch, wrote in dissent that the Moores paid taxes on an investment "that never yielded them a penny." Under the 16th Amendment, Thomas wrote, the only income that can be taxed is "income realized by the taxpayer."

Lawyers for the Moores said they were disappointed by the ruling, but took some hope from its narrowness. "What this means is that the constitutionality of other species of future taxes — such as a national wealth tax — remains entirely unaddressed by the court's opinion," said Dan Greenberg, general counsel of the Competitive Enterprise Institute.

Greenberg pointed to a separate opinion from Justice Amy Coney Barrett, joined by Justice Samuel Alito, that agreed the Moores should lose this case. But Barrett also sided with the dissenters in arguing that income has to be realized — in essence, received — to be taxed in accord with the Constitution.

Kavanaugh's opinion left the issue of realization open and there are now four justices, one shy of a majority, who have declared their opposition to taxes, like a wealth tax, that don't require realization.

Leslie Samuels, a tax expert who served in the Treasury Department during the Clinton administration, said the court's decision was unsettling because it seemed to encourage more legal challenges to taxes and warn Congress that its ability to impose new taxes may be restricted.

"While the government won, the Moores' backers effectively achieved some important and disquieting successes for the future," Samuels said.

The case also had kicked up ethical concerns and raised questions about the story the Moores' lawyers told in court filings. Alito rejected calls from Senate Democrats to step away from the case because of his ties to David Rivkin, a lawyer who is representing the Moores.

Public documents show that Charles Moore's involvement with the company, including serving as a director for five years, is far more extensive than court filings indicate.

The case is Moore v. U.S., 22-800.

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Associated Press writer Fatima Hussein contributed to this report.

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