The U.S. Customs and Border Protections Agency said it will stop collecting tariffs imposed under the International Emergency Economic Powers Act at 12:01 a.m. EST on Tuesday. This comes three days after the Supreme Court declared the taxes illegal.
The agency said in a message to shippers on its Cargo Systems Messaging Service (CSMS) that it will de-activate all tariff codes associated with President Donald Trump’s prior IEEPA-related orders as of Tuesday.
The halting of these tariffs coincides with Trump’s imposition of a new, 15% global tariff under a different legal authority to replace the ones struck down by the Supreme Court. CBP did not give a reason for continuing to collect the tariffs at ports of entry days after the Supreme Court’s ruling. The message did not say anything about possible refunds.
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The message noted that the collection halt does not affect any other tariffs imposed by Trump, including those under the Section 232 national security statute and the Section 301 unfair trade practices statute. “CBP will provide additional guidance to the trade community through CSMS messages as appropriate,” the agency said.
The U.S. Supreme Court had declared that the president exceeded his statutory authority by imposing broad import duties under the International Emergency Economic Powers Act (IEEPA)—a Cold War-era law intended for limited emergency economic actions. The court noted that tariffs are essentially taxes and duties that belong to Congress alone under Article I of the Constitution, and the Congress did not grant the executive branch the power to levy tariffs under IEEPA. The court’s ruling invalidates the majority of the so-called “emergency” tariff regime that has been central to the administration’s trade strategy since early 2025.
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A Reuters report stated that the Supreme Court decision means more than $175 billion in U.S. tariff collections are subject to potential refunds. Their estimate, produced at Reuters’ request, was derived from a ground-up forecasting model that uses tariff rates by product and country for specific duties imposed by Trump, including those under the International Emergency Economic Powers Act (IEEPA), said Lysle Boller, senior economist for Penn-Wharton Budget Model (PWBM), a non-partisan fiscal research group at the University of Pennsylvania.
“The Supreme Court did not talk explicitly about the $175 billion in tariffs that could potentially be refunded. On the other hand, their ruling today clearly does open that door for those refunds to be demanded,” PWBM director Kent Smetters told Reuters.