• The U.S. Supreme Court ruled 6-3 that President Trump's tariffs under the International Emergency Economic Powers Act (IEEPA) were unlawful, invalidating all such tariffs and raising questions about refunds for the $129–$200 billion collected from importers.
  • Trump's statement reflects his prediction of prolonged litigation over refunds, aligning with the Court's decision not to specify a refund process, leaving it to lower courts like the Court of International Trade (CIT) and U.S. Customs and Border Protection (CBP).
  • Importers, including major retailers like Costco (COST), are poised to seek refunds, with potential economic impacts including billions injected back into the economy and relief for consumers who faced higher prices.

Legal and Financial Fallout Unfolds

In a landmark decision on February 20, 2026, the Supreme Court struck down tariffs imposed by former President Donald Trump under the IEEPA, deeming them unlawful from the outset. The ruling, which passed with a 6-3 majority, has immediately sparked a complex legal scramble over refunds for the estimated $129 to $200 billion collected from importers. Trump, when asked about the necessity of refunding this revenue, bluntly stated, "We'll end up being in court for the next five years," a prediction that underscores the protracted battles ahead as businesses and governments navigate the aftermath.

The Court's opinion, delivered without specifying a refund mechanism, effectively kicks the issue back to lower courts, including the CIT and CBP. This leaves importers in a precarious position, with many now rushing to file protective lawsuits within the two-year statutory window to secure their claims. According to people familiar with the matter, the CIT is expected to lift stays and order reliquidation and refunds soon, but the process could be mired in delays as courts grapple with the sheer volume of cases. In the dissent, Justices Kavanaugh, Thomas, and Alito argued that tariffs could be valid under other statutes, warning of potential "chaos" from refunds, as costs were already passed on to consumers.

Importers Gear Up for Refund Claims

Major retailers like Costco, which sued the Trump administration in December 2025 for tariff refunds, are at the forefront of this push. With over 800 locations globally and annual revenue exceeding $250 billion, Costco's case highlights the broad impact on the retail sector, where tariffs increased costs on imported goods such as steel and aluminum, contributing to higher prices for everyday items. A Yale report estimated that these tariffs led to an average family loss of $1,751, fueling public outcry and legal challenges from states like California, whose governor, Gavin Newsom, demanded immediate refunds with interest, calling the tariffs an "illegal cash grab."

Efforts to recover these funds have hit a snag, however, as the legal pathways diverge based on whether tariff entries were liquidated or unliquidated. Unliquidated entries, which accounted for 19.2 million of the 34 million total by December 2025, may be eligible for administrative corrections through CBP, while liquidated ones require lawsuits in the CIT under 28 U.S.C. 1581(i). This bifurcation adds layers of complexity, with importers advised to update their CBP banking details and prepare for a wave of litigation. Without a clear resolution, companies could face significant financial strain, though some analysts predict that successful refunds might inject billions back into the economy, offering a modicum of relief after years of elevated costs.

Broader Implications for Trade Policy

The Supreme Court's decision not only invalidates the IEEPA tariffs but also sets a precedent that limits presidential tariff power without congressional approval, invoking the major questions doctrine. This ruling contrasts with other Trump-era tariffs, such as those under Section 301 on China, which were upheld by the Federal Circuit in September 2025 and are pending SCOTUS review. The fallout is already reshaping global trade dynamics, as it undermines Trump's reciprocal tariffs on allies like Canada and Mexico, potentially easing international tensions but signaling a more constrained executive role in trade matters.

In the short term, stakeholders from small businesses to multinational corporations are assessing their options, with many turning to legal experts for guidance on navigating the refund process. "We're in uncharted territory here," said one attorney specializing in trade law, who requested anonymity due to ongoing cases. "The Court's silence on refunds means every importer will have to fight their own battle, and it could take years to sort out." Meanwhile, the political reverberations continue, with Newsom's administration pushing for swift action to mitigate consumer harm, while Trump's camp downplays the ruling's impact, framing it as a temporary setback in a larger trade strategy.

As the legal drama unfolds, market watchers are keeping a close eye on related developments, including the pending SCOTUS review of Section 301 tariffs and any legislative responses from Congress. For now, the focus remains on the immediate next steps: lower court rulings, refund filings, and the inevitable appeals that will test Trump's prediction of a five-year court saga. In a brief statement, a spokesperson for Costco declined to comment on ongoing litigation, but industry insiders suggest that the retailer's lawsuit could set a benchmark for other claims, shaping the financial landscape for years to come.

Correction: An earlier version of this article misstated the number of tariff entries; it has been updated to reflect that 19.2 million of 34 million entries were unliquidated as of December 2025.