American businesses that paid tariffs subsequently ruled unconstitutional by the Supreme Court will be able to begin submitting refund applications Monday, as the Trump administration prepares to launch a dedicated online portal, according to Axios.

The portal represents the first phase of the federal government's efforts to comply with court orders requiring it to reimburse importers for billions of dollars in tariffs and accrued interest.

What prompted the refunds

The Supreme Court determined that certain tariffs imposed under the International Emergency Economic Powers Act were illegal, opening the door for affected businesses to seek repayment. The ruling created a legal obligation for the government to return funds collected through those measures.

However, the court's decision did not specify the mechanism by which the government should carry out those refunds, leaving the administration to design its own repayment process.

How the portal works

The new system, accessible through U.S. Customs and Border Protection's Automated Commercial Environment platform, is intended to streamline the application process for importers seeking reimbursement. Businesses will be able to submit claims detailing the tariffs they paid that fall under the scope of the court's ruling.

This launch marks only the initial step in what is expected to be a lengthy and complex repayment process, given the scale of funds involved and the number of businesses potentially eligible to file claims.

Scope of the issue

The sums at stake are significant. Importers across a wide range of industries paid tariffs under the contested authority, and the total liability for the federal government - including interest obligations - is expected to amount to billions of dollars.

The administration has not yet detailed a timeline for processing claims or disbursing payments once applications are submitted.

What remains unresolved

Legal and procedural questions remain open. Because the Supreme Court did not prescribe a specific method for repayment, businesses and trade attorneys are watching closely to see how the administration structures eligibility criteria and verification requirements through the new system.

The launch of the portal is being interpreted by trade observers as a signal that the administration intends to move forward with compliance, though the pace and completeness of refunds have yet to be demonstrated in practice.

Businesses seeking to apply are advised to consult the U.S. Customs and Border Protection website and review documentation requirements before submitting claims through the portal beginning Monday.