How do I know if my car was assembled in the US?

Check the VIN. A first character of 1, 4, or 5 indicates US final assembly; the window sticker also lists final assembly point. Brand nationality is irrelevant — a Tennessee-built import brand qualifies while a Mexico-built domestic brand doesn't. The NHTSA VIN decoder gives a definitive answer.

Does a lease qualify?

No. Leases aren't loans — there's no loan interest to deduct. Only a purchase loan secured by the vehicle qualifies.

I bought a used car in 2025. Any deduction?

No — the deduction is limited to new vehicles whose original use begins with you. Certified pre-owned and other used purchases don't qualify regardless of where the vehicle was assembled.

I refinanced my new-car loan. Does the interest still count?

A refinance of a qualifying post-2024 loan on a qualifying vehicle generally preserves the deduction (up to the original balance). Refinancing a loan that originated before 2025 doesn't create eligibility — the original loan date controls.

How do I know if my car was assembled in the US?

Check the VIN. A first character of 1, 4, or 5 indicates US final assembly; the window sticker also lists final assembly point. Brand nationality is irrelevant — a Tennessee-built import brand qualifies while a Mexico-built domestic brand doesn't. The NHTSA VIN decoder gives a definitive answer.

Does a lease qualify?

No. Leases aren't loans — there's no loan interest to deduct. Only a purchase loan secured by the vehicle qualifies.

I bought a used car in 2025. Any deduction?

No — the deduction is limited to new vehicles whose original use begins with you. Certified pre-owned and other used purchases don't qualify regardless of where the vehicle was assembled.

I refinanced my new-car loan. Does the interest still count?

A refinance of a qualifying post-2024 loan on a qualifying vehicle generally preserves the deduction (up to the original balance). Refinancing a loan that originated before 2025 doesn't create eligibility — the original loan date controls.

Car Loan Interest Tax Deduction 2025: New Vehicle Rules Explained

The 2025 law made interest on qualifying personal auto loans deductible from federal taxable income, up to $10,000 per year. The qualification rules are specific, and they're where most of the confusion lives: the vehicle must be new (not used), for personal use, its final assembly must have occurred in the United States, and the loan must have originated after December 31, 2024 and be secured by the vehicle.

The US-assembly test trips people up in both directions. Plenty of "foreign" brands assemble popular models in Alabama, Ohio, Tennessee, and Texas — and plenty of "American" brands assemble models in Mexico or Canada. The VIN settles it: a first character of 1, 4, or 5 generally indicates US assembly. Buyers who assumed their vehicle didn't qualify — or whose software never asked — left real money unclaimed.

The deduction phases out above $100,000 of income ($200,000 joint) at $200 per $1,000 over, works without itemizing, and runs through 2028. Lenders issue interest statements for qualifying loans, and a first-full-year loan on a typical new car generates $1,500–$4,000 of deductible interest.

Figures above are screening estimates under the 2025 federal rules (P.L. 119-21), not tax advice. A licensed professional confirms actual amounts from your W-2 and filed return before anything is submitted to the IRS. Learn more at the 2025 Refund Checkup.

The new car loan interest deduction, explained.

What filers actually ask.

How do I know if my car was assembled in the US?

Does a lease qualify?

I bought a used car in 2025. Any deduction?

I refinanced my new-car loan. Does the interest still count?

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