Supreme Court strikes down Trump’s tariffs: What this means for over $150 billion in potential refunds

Court ruling could trigger massive tariff refunds

The U.S. Supreme Court has ruled that President Donald Trump exceeded his authority by imposing broad emergency tariffs under the International Emergency Economic Powers Act (IEEPA), in a decision that could reshape U.S. trade policy. The 6–3 conservative-majority ruling declared that IEEPA “does not authorise the President to impose tariffs,” limiting unilateral executive power in global trade.

Chief Justice John Roberts wrote, “The president asserts the extraordinary power to unilaterally impose tariffs of unlimited amount, duration, and scope,” adding that Trump lacked “clear congressional authorisation” to exercise such emergency authority.

Over $150 billion in tariffs could be refunded

The Supreme Court ruling raises questions about whether U.S. importers could receive refunds for tariffs collected under IEEPA. Economists at the Penn-Wharton Budget Model (PWBM) estimate that $150 to $175 billion in tariff collections may be at risk if refunds are required.

“The model uses U.S. Census Bureau import data across 11,000 product categories and 233 countries, calculating roughly $500 million in IEEPA-based revenue collected daily,” Lysle Boller, senior economist at PWBM, told Reuters. PWBM’s estimates suggest $179 billion in total receipts have been collected since February 2025, when Trump began imposing the duties.

Supreme Court ruling leaves refund process uncertain

The 6-3 Supreme Court decision did not clarify how the $134 billion collected from Trump’s tariffs should be handled. Justice Brett Kavanaugh noted, “nothing today about whether, and if so how, the government should go about returning the billions of dollars that it has collected from importers.” Officials have warned that the repayment process could be chaotic, with Kavanaugh adding, “That process is likely to be a ‘mess.’”

Treasury prepared for refunds, alternative measures

U.S. Treasury Secretary Scott Bessent told Reuters in January that the Treasury can easily cover any potential refunds, though he remained confident that the Supreme Court would uphold the tariffs. The Treasury continues to plan for large cash balances, projecting $850 billion at the end of March and $900 billion at the end of June.

Trump administration officials have indicated that if IEEPA-based tariffs are invalidated, they would pivot to alternative tariff authorities to maintain trade pressure on U.S. partners. Sector-specific tariffs, such as those on steel and aluminium, are unaffected by the Supreme Court’s ruling.

Implications for U.S. trade and global markets

The court’s decision signals limits on presidential authority to impose sweeping trade measures without congressional approval. Businesses and importers may face uncertainty over refunds, while exporters may benefit from a potential rollback of unlawful tariffs. Analysts say this ruling could reshape future U.S. trade enforcement, reducing unilateral use of emergency economic powers.

The ruling also underscores the legal complexities of Trump’s approach, which combined broad “reciprocal” tariffs on trade partners with targeted duties linked to immigration and drug concerns, reflecting the administration’s aggressive use of trade tools to achieve foreign policy goals.