Supreme Court Ruling Triggers Massive Tariff Refund Effort

The U.S. Supreme Court’s decision that tariffs imposed under the International Emergency Economic Powers Act (IEEPA) were unlawful has set in motion a complex refund process for importers and businesses across the country.

With no clear instructions from the Court on the timing or method for issuing refunds, federal agencies and affected companies are navigating administrative and legal steps to address the return of billions of dollars collected under the invalidated tariffs.

By early March 2026, more than 330,000 importers had paid approximately $166 billion in IEEPA tariffs that are now subject to refund. The government’s total refund liability is estimated to reach as high as $175 billion, according to figures reported by multiple sources. U.S. Customs and Border Protection (CBP) has stated that processing all refund claims manually would require over 4.4 million man-hours, prompting efforts to automate the process.

CBP is working to implement a new system designed to streamline the refund process, with expectations that it will be operational within 45 days. The agency has indicated that the new system will minimize the amount of documentation required from importers, aiming to reduce administrative burdens and speed up payments.

What the numbers show

• Over 330,000 importers made more than 53 million tariff entries as of March 4, 2026
• Michigan businesses paid $3.8 billion and Ohio businesses $4.2 billion in IEEPA tariffs between February and December 2025
• Delays in refunds are costing U.S. importers about $700 million per month in interest, according to the Cato Institute

Legal proceedings have continued alongside administrative developments. On March 2, 2026, a federal appeals court denied a request from the Trump administration to postpone the start of the refund process by 90 days. This decision maintained the timeline for moving forward with refunds to affected importers.

FedEx has filed a case in the U.S. Court of International Trade to secure its right to a refund. The company has stated that any refunds it receives will be returned to its shippers and customers, reflecting the broader impact on supply chain participants.

Small businesses have reported that the process of claiming refunds is lengthy and expensive, with some indicating that those without access to legal support may find it difficult to recover funds. These challenges have been highlighted by business owners as the refund process unfolds.

Industry reaction

FedEx stated in court filings that it intends to pass on any refunded tariff amounts to its customers and shippers. This approach is aimed at ensuring that those who originally bore the cost of the tariffs receive the appropriate reimbursement.

CBP has announced the development of a new system to address the scale of refund claims, citing the infeasibility of manual processing and the need for technological upgrades to handle the volume efficiently.

* This article is based on publicly available information at the time of writing.