The US, Canada, and Mexico face a July 1, 2026 deadline to decide whether to extend the USMCA trade agreement. The Trump administration is actively weighing changes that would subject USMCA-compliant vehicles, currently protected by partial tariff exemptions, to an effective tariff rate of roughly 10%, according to reporting from Bloomberg and Reuters in mid-April. That's a significant increase for vehicles that today pay close to 0% effective duty because of their North American content.
If those changes take effect, another wave of new car price increases follows. And since the used car market tracks new car prices with a delay, used buyers aren't insulated.
How the Current Exemption Works
The 25% tariff on imported vehicles took effect April 3, 2025. But USMCA-compliant vehicles assembled in Canada or Mexico with at least 75% North American content don't pay the full rate. Under the current rules, the tariff applies only to the non-US portion of the vehicle's value. A car assembled in Ontario with 60% US content effectively pays 25% on the remaining 40%, giving it an effective tariff of roughly 10%. A car with 80% US content in a Canadian plant pays closer to 5%.
This is how the Detroit Three have managed to keep some Canada- and Mexico-assembled vehicles competitive against Asian rivals paying flat 15% duty on Japan and Korea imports.
What the Proposed Changes Would Do
The administration's concern is that automakers are claiming USMCA relief without actually moving production and sourcing to the US at the scale the tariffs were meant to encourage. The internal proposals under discussion would limit or restructure the non-US content carve-out, effectively raising the tariff floor for USMCA-compliant vehicles to around 10% regardless of US content percentage.
The Detroit Three have pushed back. General Motors, Ford, and Stellantis have argued publicly that raising their Canada/Mexico vehicle tariffs above 10% would put them at a disadvantage versus Asian brands, which negotiate bilateral deals at flat rates. Their USMCA plants have higher US content than the exemption rules require.
No formal proposal has been submitted to Canada or Mexico. But the July 1 meeting is a hard deadline. The three governments must decide whether to extend USMCA, revise it, or allow it to expire in 2036.
Vehicles Most Exposed to Rule Changes
Models currently assembled in Canada and Mexico that rely on USMCA compliance for partial tariff protection would face the biggest impact if the exemption structure changes.
| Vehicle | Assembly Location | Current USMCA Status | Risk if Rules Tighten |
|---|---|---|---|
| Chevrolet Equinox (gas) | San Luis Potosi, Mexico | USMCA-compliant | High: currently near 0% duty |
| Toyota RAV4 (gas) | Ontario, Canada | USMCA-compliant, ~75% foreign parts | Medium: already paying partial rate |
| Honda CR-V (gas) | Ontario, Canada | USMCA-compliant | High: one of highest-volume US-sold Canada builds |
| RAM ProMaster | Saltillo, Mexico | USMCA-compliant | High |
| Honda HR-V | Celaya, Mexico | USMCA-compliant | High |
| Volkswagen Tiguan | Puebla, Mexico | USMCA-compliant | High |
| Toyota Tacoma | San Antonio, TX (US) | US-assembled | Low: minimal tariff exposure |
| Ford F-150 | Dearborn, MI / Kansas City, MO (US) | US-assembled | Low |
US-assembled vehicles aren't immune. Tariffed imported parts still add $1,600 to $2,000 to their production cost, per KBB data. But they don't depend on the USMCA carve-out the way Canada- and Mexico-built vehicles do.
If rules tighten, expect further increases of $3,500 to $7,000 on the Canada/Mexico models currently protected by partial exemptions, per industry estimates. Japanese and Korean imports on flat-rate tariff deals would see less additional impact since they already pay the full negotiated rate. US-assembled vehicles like the Toyota Camry (Georgetown, KY) are outside this exposure entirely.
Used Car Prices Are Already Absorbing the First Wave
The Manheim Used Vehicle Value Index hit 215.3 in March 2026, up 6.2% year over year, according to Cox Automotive. Average retail used car price is approximately $25,500 per CARFAX's April 2026 data, up roughly $1,500 in a single month.
That run-up is directly connected to the tariffs already in place. New car average transaction prices reached $49,353 in February, up 10.4% year over year per Kelley Blue Book. Buyers priced out of new end up competing for used. The pool of trade-ins tightens as fewer people buy new. Wholesale auction prices rise. Dealers pay more, list more, and the retail price follows.
Cox Automotive projects consumer-facing prices to climb 4-8% more by year-end under existing tariff conditions. That forecast doesn't model a second round of USMCA-driven increases.
What This Means for Your Buying Timeline
The seasonal pattern still holds. Spring is historically the hottest used car window, and summer brings modest softening as trade-in volumes increase. If you can wait until late summer, that's historically a better time to negotiate on most vehicle categories.
The USMCA wildcard changes the calculus for one specific group: buyers shopping for models currently assembled in Canada or Mexico under USMCA protection. That includes some of the most popular mainstream vehicles on the market. If the July 1 review produces tougher rules, the 2024 and 2025 model years of those vehicles represent the last cohort priced before a second tariff event. Used prices for those specific models would face upward pressure as new-car price gaps widen further.
You don't need to manufacture urgency. The data is either there for your situation or it isn't. If you're shopping for a Chevy Equinox, Honda CR-V, or another Canada/Mexico-assembled model, understanding the USMCA exposure for that specific vehicle is now part of the calculation.
FAQ
When would USMCA changes actually affect car prices? The July 1 meeting determines whether the three governments agree to extend, revise, or let the agreement proceed toward its 2036 expiration. Any rule changes negotiated this summer would likely affect pricing on new model year vehicles hitting dealer lots in late 2026 or 2027. Used prices for currently-produced models would follow within 6-12 months as the new-car market shifts.
Which cars would be most affected by USMCA renegotiation? Vehicles assembled in Canada and Mexico that currently qualify for partial tariff exemptions would see the largest impact. Highest-risk: Chevy Equinox (Mexico), Honda CR-V (Ontario), Honda HR-V (Mexico), Toyota RAV4 gas (Ontario), RAM ProMaster (Mexico), and VW Tiguan (Mexico). US-assembled vehicles like the Ford F-150, Toyota Tacoma (US plant), and Honda CR-V Hybrid (Ohio) have less USMCA exposure.
Should I buy a car before July 2026? Not necessarily. The USMCA changes being discussed aren't finalized, and negotiations could produce a clean extension with no changes. The practical angle: if you're already ready to buy and your target vehicle is a high-USMCA-exposure model, the current pricing reflects existing tariff conditions, not potential new ones. If you're months away from buying, summer is historically softer for negotiation anyway. The USMCA outcome is a variable to monitor, not a hard deadline to race.
CarScout tracks days on market and price history on individual listings, so you can see how long a specific vehicle has been sitting and whether asking prices are moving. That information matters more than macro timing for most buyers. Learn more at usecarscout.com.