The Supreme Court Killed Most Tariffs but the 25% Auto Duty Survived, and Used Car Prices Are Already Climbing

When the Supreme Court struck down President Trump's IEEPA-based tariffs in a 6-3 ruling on February 20, the immediate reaction across financial markets was relief. Retail stocks surged. Consumer-facing companies rallied. Headline after headline proclaimed that the era of sweeping import taxes was over. Amazon, Nike, and Etsy led retail stocks to their best day of 2026. The narrative was clear: the tariff burden had been lifted, and American consumers would finally catch a break.

But for the 150 million Americans who drive a car, the celebration was premature. The tariff that matters most for their wallets, the 25% duty on imported vehicles and certain auto parts imposed under Section 232 of the Trade Expansion Act of 1962, was not part of the Supreme Court case. It remains in full force. And the data from the wholesale used car market suggests that prices are already moving in the wrong direction.

The Tariff That Survived

The legal distinction is critical and widely misunderstood. The Supreme Court's ruling specifically addressed tariffs imposed under the International Emergency Economic Powers Act, which the President had used to levy duties on a broad range of imports from dozens of countries. The Court found that IEEPA, a statute designed for national security emergencies, did not authorize the kind of permanent, economy-wide trade barriers the administration had erected.

But the Section 232 tariffs on steel, aluminum, and automobiles were imposed under a different statute with a different legal foundation. Section 232 authorizes the President to restrict imports that threaten national security, and the courts have historically granted wide deference to executive determinations of what constitutes a security threat. The 25% tariff on imported vehicles, which took effect in phases during 2025, was justified under the argument that a weakened domestic auto manufacturing base would compromise America's industrial capacity in a conflict.

That tariff covers all passenger vehicles imported from outside the United States, including cars manufactured in Canada, Mexico, Japan, South Korea, Germany, and the United Kingdom. It also applies to a growing list of auto parts, including engines, transmissions, electrical components, and body panels. The Tax Foundation estimates that Section 232 auto tariffs will generate roughly $635 billion in government revenue over the next decade, a figure that reflects the sheer volume of vehicles and parts that cross American borders every year.

The Used Car Market Feels It First

The mechanics of how tariffs flow through the auto market are predictable but slow-moving. New car prices rise first, as manufacturers pass through the higher cost of imported vehicles and parts. As new cars become more expensive, demand shifts to the used market, where prices rise in sympathy. The effect is a cascading price increase that eventually touches every vehicle on the road.

The Manheim Used Vehicle Value Index, the most widely tracked measure of wholesale used car prices, already shows the trend in motion. The index stood at 210.0 in mid-February, reflecting a 2.9% year-over-year increase in wholesale prices. Non-adjusted prices are up 3.1% from a year ago. The wholesale market carried January's momentum into February, with year-over-year price growth accelerating even as the seasonally adjusted index edged lower by 0.2%.

These numbers do not yet reflect the full impact of the tariffs. Many of the vehicles currently in the used market were manufactured or imported before the 25% duty was fully implemented. As the pre-tariff inventory sells through and is replaced by vehicles built with tariffed components, wholesale prices are expected to climb further. Cox Automotive, which publishes the Manheim Index, projects that used vehicle prices will appreciate 2% to 4% in 2026, with the possibility of higher increases if new vehicle production is curtailed by rising input costs.

New Car Sticker Shock

The new car market is where the tariff impact is most visible, and the numbers are stark. Industry analysts estimate that the 25% import duty adds between $3,000 and $12,000 to the price of a new vehicle, depending on where it was assembled and what proportion of its components were imported. A Toyota Camry assembled in Japan faces the full 25% duty on the vehicle's value. A Ford F-150 assembled in Michigan but built with an imported transmission, imported electrical systems, and imported steel still carries a significant tariff burden on its component costs.

The average transaction price for a new vehicle in the United States was approximately $48,000 in January 2026, according to Kelley Blue Book. That figure is up roughly 4% from a year ago, and industry forecasters attribute a meaningful portion of the increase directly to tariff-driven input costs. For a consumer financing a $48,000 vehicle at current interest rates of roughly 7% over 72 months, the monthly payment exceeds $800, a figure that strains the budgets of most American households.

Car dealers, caught between rising wholesale costs and consumers who are increasingly unwilling to absorb further price increases, describe the market as "stuck." Inventory is building on dealer lots as vehicles sit longer, with the average days-to-sell metric rising across most segments. But dealers cannot discount aggressively because their acquisition costs have risen in lockstep with tariff-inflated wholesale prices.

The Insurance Multiplier

The tariff impact extends beyond the purchase price. Auto insurance premiums, which declined an average of 6% in 2025 after years of historic increases, are already climbing again in 2026. The reason is directly connected to the tariff on auto parts: when replacement parts cost more, the cost of repairing a vehicle after an accident rises, and insurers pass that cost through to policyholders in the form of higher premiums.

Insurance industry data shows premiums rising across 35 states in early 2026, with the largest increases concentrated in regions where imported vehicles make up a higher share of the fleet. For a household that owns two vehicles and carries full coverage, the annual insurance cost now frequently exceeds $4,000, a figure that, combined with loan payments, fuel, and maintenance, pushes total vehicle ownership costs above $1,000 per month.

No Relief in Sight

The political dynamics around the Section 232 auto tariffs make repeal or reduction unlikely in 2026. The administration views the tariffs as a cornerstone of its manufacturing policy, and the domestic auto industry's unions have broadly supported the duties as protection against foreign competition. Congressional opposition has been muted, partly because the tariff revenue helps offset the deficit impact of the administration's tax cut proposals.

For consumers, the implication is clear: the cost of owning and operating a vehicle in America is going to keep rising, regardless of what the Supreme Court decided about IEEPA. The tariff that survived the Court's ruling is the one that touches the largest number of American households in the most direct way.

The celebration was understandable. But for anyone who drives to work, drops their kids at school, or relies on a car for the basic logistics of American life, the tariff bill has not been reduced. It has merely been reorganized.