On the Dash:
- A Supreme Court ruling on IEEPA tariffs could cost automakers $1.8 billion annually, including $902 million for the Detroit Three.
- Higher costs and economic uncertainty may reduce U.S. light-duty vehicle sales and raise average prices.
- Section 232 vehicle tariffs will continue regardless of the court’s ruling, sustaining pressure on the auto industry.
A pending U.S. Supreme Court case challenging President Donald Trump’s global tariffs could impose up to $1.8 billion in annual manufacturing costs on automakers, even though the case does not directly target vehicle-specific levies.
The case, Learning Resources, Inc. v. Trump, questions whether the president had legal authority under the 1977 International Emergency Economic Powers Act (IEEPA) to impose broad tariffs on products from more than 90 countries. The IEEPA tariffs currently cover machinery and lower-value raw materials, a narrow portion of automakers’ production costs, but one that is significant enough to show up on company balance sheets.
The Center for Automotive Research estimates that the Detroit Three automakers could face around $902 million in costs under the IEEPA tariffs, roughly $250 per vehicle. While this is smaller than the impact of vehicle-specific Section 232 tariffs, which have cost automakers nearly $108 billion or $4,240 per vehicle, the economic effects remain notable. Broader household and economic impacts could include $1,200 in costs per household in 2025 and a 0.6% reduction in national gross domestic product.
The tariffs come amid other pressures on the auto industry, including high interest rates, the end of federal EV tax credits, and the removal of the $800 de minimis exemption on imports. Analysts note that higher tariffs and economic uncertainty could reduce consumer purchases, leading to lower vehicle sales and production.
Projections for the U.S. auto industry suggest that light-duty vehicle sales in 2025 may total 16.2 million units, about 150,000 units fewer than expected under previous policy frameworks, with average prices rising 2.3%. For 2026, analysts estimate sales could decline by 800,000 units, average vehicle prices could rise 4.6%, production could drop by 365,000 units, and employment in vehicle manufacturing could fall by 18,000.
Even if the Supreme Court rules against the IEEPA tariffs, Section 232 vehicle tariffs will remain in place, maintaining pressure on automakers and consumers and continuing to affect production, pricing, and retail sales.
