Car Loan Interest Deduction — Which Vehicles Actually Qualify

A vehicle qualifies for the car loan interest deduction only if it meets every one of six tests at once — under 26 U.S.C. §163(h)(4)(C) — new (original use begins with you), a car/minivan/van/SUV/pickup truck/motorcycle, at least 2 wheels, manufactured for public roads, under 14,000 lbs gross vehicle weight rating, and finally assembled in the United States. ATVs and RVs do not appear in the statute's list, despite sometimes being mentioned in secondary summaries.

What does this mean for you? Work out your own number: Car loan interest deduction calculator

The car loan interest deduction doesn’t ask whether you have a car loan — it asks whether the specific vehicle you financed clears six separate tests, all at once. Fail any one and the interest isn’t deductible at all, regardless of the loan terms or how much interest you paid.

The six tests, from 26 U.S.C. §163(h)(4)(C)

1. New to you. “The original use of which commences with the taxpayer” — a used or previously-titled vehicle doesn’t qualify, even if you’re financing it for the first time.
2. The right body type. Car, minivan, van, sport utility vehicle, pickup truck, or motorcycle. Nothing else counts — including two types sometimes mentioned in secondary coverage of this deduction:
   • ATVs don’t appear in the statute’s list.
   • RVs don’t appear either.
3. At least 2 wheels.
4. Manufactured primarily for use on public streets, roads, and highways — excluding anything operated exclusively on rails.
5. Under 14,000 lbs gross vehicle weight rating. This rules out most heavy-duty commercial trucks.
6. Final assembly in the United States. Not “American brand,” not “sold in the US” — specifically where the vehicle was finally put together.

How to check final assembly

Two ways, per IRS guidance:

• The window sticker on a new vehicle at a dealership lists the final assembly location directly.
• The VIN. Once you have the vehicle identification number, NHTSA’s VIN Decoder tool reports the plant of manufacture, which tells you the assembly location even after you’ve already bought the vehicle and the window sticker is gone.

A car assembled in Canada, Mexico, Germany, Japan, or South Korea — even one sold by a brand widely thought of as American, or one whose parts are majority US-sourced — doesn’t meet this test unless final assembly itself happened in the US.

The loan itself has a date requirement too

Separately from the vehicle, the loan has to have been taken out after December 31, 2024. A loan originated earlier, even for an otherwise-qualifying vehicle, doesn’t generate deductible interest under this provision.

Once you’ve confirmed the vehicle and loan both qualify, put your MAGI and the interest paid into the car loan interest deduction calculator to see your actual deduction after the phase-out.