Tariff Refunds and Legal Challenges After Supreme Court Ruling
A landmark decision by the US Supreme Court has triggered a complex legal and financial landscape, with potential refunds of over $130 billion (€111 billion) at stake. Some estimates suggest the figure could rise to as much as $175 billion (€150 billion). This uncertainty follows a recent ruling by a US appeals court, which accelerated the process of determining how these refunds will be handled.
On Monday, the US Court of Appeals for the Federal Circuit issued a one-page order that immediately sent the matter back to the US Court of International Trade (CIT). The court rejected the Justice Department’s request for a four-month delay, allowing the administration no time to consider its next steps.
The Supreme Court’s 6–3 decision on 20 February found that the International Emergency Economic Powers Act (IEEPA) of 1977 does not grant the president authority to impose tariffs. This invalidated sweeping duties introduced in 2025, including a 10% “reciprocal” baseline tariff on goods from nearly all US trading partners. Additional higher rates were applied based on perceived trade deficits, with targeted duties such as 25% on certain imports from Canada and Mexico and 10% on China.
These reciprocal IEEPA tariffs were quickly terminated, with collections ceasing from 24 February. However, the Supreme Court did not provide guidance on remedies, leaving the mechanics of potentially vast repayments—such as whether interest is owed—to the CIT.
A Surge in Litigation
The ruling has sparked an unprecedented wave of litigation. At the time of writing, around 2,000 importers have already filed suits at the CIT seeking refunds. These cases are largely driven by “tag-along” actions, which transfer pending motions between courts to protect rights and avoid statutory deadline expirations.
Under US customs rules, importers typically have 180 days after liquidation of entries to protest duties paid. The original challenge was brought by small businesses, including the educational toy company Learning Resources. A group of small importers urged the Federal Circuit to expedite proceedings so relief could begin promptly. Major companies have since joined the fray, with lawsuits filed by FedEx, Revlon, Costco, Reebok, and others, alongside hundreds of smaller firms.
Lawyers report frantic activity as businesses race to preserve claims, with many entries already liquidated, adding layers of complexity. The CIT must now establish a case-management framework for what could become the largest tariff refund operation in US history.
Potential Delays and Financial Implications
The US administration has previously indicated it would issue refunds if the tariffs were struck down, yet President Trump has warned the process could involve years of litigation, potentially up to five. Delays would impose significant interest costs on the US Treasury, though the precise timeline remains uncertain.
For affected companies, successful claims promise cash-flow relief after duties that many could not fully pass on to customers. However, the proceedings are expected to be lengthy and contentious, requiring coordination on everything from documentation to distribution.
Indirect Relief for EU Exporters
For the European Union, the US Supreme Court’s decision and subsequent appeals court order deliver indirect benefits but no automatic financial compensation. EU goods were subject to the now-invalidated reciprocal IEEPA tariffs, which raised costs for American buyers of European machinery, chemicals, vehicles, luxury items, and more.
With those measures voided, EU exporters enjoy immediate relief from that particular burden. Crucially, however, any refunds will flow exclusively to US importers who paid the duties, not to EU companies, governments, or suppliers. European firms that absorbed costs or lost sales during the tariff period have no direct legal claim on US Treasury repayments.
Any downstream advantage would depend on US importers choosing to pass on savings through lower prices or better terms.
Cautious Response from the EU
Broadly speaking, the EU has responded cautiously but positively so far. The European Commission’s spokespeople have described the US Supreme Court’s ruling as a welcome affirmation of checks and balances and the rule of law, while stressing the need for clarity and stability in transatlantic trade.
The European Parliament’s research service has noted the judgment’s silence on refunds while highlighting its broader significance. Yet, fresh challenges persist. Within hours of the US Supreme Court decision, the administration imposed a new 10% tariff on goods from all countries under Section 122 of the Trade Act of 1974, signaling a possible rise to 15% for a 150-day period.
Certain sectors, including civil aviation products, received exemptions. The EU has paused ratification of a recently negotiated framework for a EU-US trade agreement amid the shifting landscape, with calls for renegotiation and clarification where needed.
European trading partners are monitoring how refund proceedings at the CIT might influence US import demand and whether new tariff authorities spark further disputes. While the invalidated IEEPA measures provide breathing space, the overall outlook remains one of volatility.
No mechanism exists for direct refunds to EU entities, leaving European exporters to navigate ongoing policy uncertainty through diplomacy and adaptation.
