What if the tariffs have to be refunded?

The Supreme Court heard oral arguments on 5 November in the landmark challenge to the administration's use of the International Emergency Economic Powers Act (IEEPA) to impose across-the-board tariffs. The justices' questions suggested serious doubts about the reach of executive power. If the court strikes the tariffs down, the money may have to be paid back, and federal finances are not ready for that.

Two defeats already

The administration arrives at the top court with a losing record. The Court of International Trade ruled in May that IEEPA does not authorise open-ended tariffs, and the Federal Circuit, sitting as a full court, agreed in August. Both rulings were stayed pending appeal, so importers have kept paying the duties for months while the legal case against them strengthened. Scepticism at the hearing came from justices appointed by Republican presidents as well as Democratic ones, which is why markets now treat a loss for the government as a live possibility.

A $130 billion bill

A ruling against the emergency tariffs could leave the government owing American importers upwards of $130 billion in collected duties. Customs law requires interest to be paid on duties collected improperly, so the Treasury would have to send out refund cheques worth billions of dollars straight away, leaving a large hole in its cash balance.

The refunds would flow through Customs and Border Protection, which settles each import entry through a process called liquidation and handles disputes through formal protests. Entries that are still open could be corrected on the paperwork; those already liquidated may require protests or litigation at the Court of International Trade. The speed of repayment therefore depends partly on how the justices frame the remedy and partly on how quickly an agency built to collect money can learn to hand it back.

The calendar adds pressure. Entries normally liquidate about 314 days after the goods arrive, and importers then have 180 days to lodge a protest. The first shipments that paid the fentanyl duties in February are therefore approaching liquidation around the turn of the year, and importers that want to keep their claims alive must file paperwork whether or not the court has ruled. The administrative queue could therefore build up well before any refund is ordered.

A precedent from 1998

Washington has refunded an unlawful levy before. In 1998 the Supreme Court held in United States v. United States Shoe Corp. that the Harbor Maintenance Tax could not constitutionally be applied to exports. Exporters then spent years claiming their money back, with interest, through the trade court. That episode suggests refunds arrive in a stream rather than a single lump, which would spread the financing burden but also prolong the uncertainty for companies deciding how to book the claims.

More bills to sell

For the Treasury's Office of Debt Management, finding $130 billion for sudden corporate refunds while also losing $25 billion a month in customs receipts would be a serious headache. The gap would have to be filled quickly with much larger auctions of Treasury bills and coupons.

Bills are the natural shock absorber, because they can be added week by week without disturbing the schedule of longer auctions. The Treasury said at its refunding announcement on 5 November that it expects to keep coupon auction sizes unchanged for at least the next several quarters, so any sudden need would fall on the bill market first. That market is already under some pressure: funding rates have shown strain at recent month-ends, and the Federal Reserve has decided to stop shrinking its balance sheet from 1 December. A burst of extra bill supply would push money-market rates higher at an awkward moment.

One-off bill, lasting gap

The refund is the smaller of the two problems. A payment of $130 billion happens once, whereas the loss of $25 billion a month recurs until Congress or the administration finds a replacement, and over a year it adds up to more than twice the refund. The administration has cited tariff revenue as a partial offset to the deficit widened by this summer's tax law, and the Congressional Budget Office has credited the duties with a large cut in projected borrowing over the next decade, much of it from the IEEPA levies.

Bond investors will notice if that offset disappears. Moody's removed the country's last triple-A rating in May, citing persistent deficits, and a court-ordered loss of revenue would make the fiscal arithmetic worse just as the Treasury leans more heavily on short-term borrowing. The likeliest market effect is a modest rise in longer-dated yields relative to short ones, as investors demand more compensation for holding government debt.

Windfalls and the fallback

The winners would be importers of record: retailers, carmakers and manufacturers that paid the duties and in many cases passed the cost on to customers. A refund would drop straight into their profits, while the consumers who paid higher shelf prices would see nothing. The administration would also try to rebuild its tariff wall under other statutes. Section 232 allows duties on national-security grounds, Section 301 covers unfair trade practices, and Section 122 permits a tariff of up to 15 per cent for 150 days to address balance-of-payments problems. Those tools take time and procedure, so revenue would fall first and recover later.

The strongest counterargument is that the court could limit the damage, for instance by applying its ruling only to future collections or leaving the refund question to the lower courts. That would shrink the immediate bill but not remove it. The date of the ruling, the wording of any remedy and the next quarterly refunding statement are the things to watch. If the court rules against the tariffs, importers will collect a large earnings windfall, and the Treasury will have to borrow heavily, and quickly, to pay for it.