The New Car Loan Interest Deduction: Which Vehicles Qualify and How to Claim It

For almost forty years, interest on a personal car loan wasn’t deductible. The tax law signed in July 2025 changed that. For tax years 2025 through 2028, you can deduct up to $10,000 a year of interest paid on a loan for a new vehicle, and you can take it even if you claim the standard deduction.

Everything hangs on the word “qualified.” The vehicle has to be new, its final assembly has to have happened in the United States, and the loan behind it must have been taken out after December 31, 2024, which rules out anyone who signed in the last days of 2024. The car has to be for personal use, and your income has to be under a limit. When you claim the deduction, the law requires the vehicle identification number on your return.

That last detail is why so much advice on this deduction boils down to “check the VIN.” The 17-character VIN records the plant that built the vehicle, and the IRS accepts it as a way to confirm where final assembly took place. A U.S. brand on the grille proves nothing. Plenty of vehicles from domestic brands are assembled in Mexico or Canada, and plenty from Japanese, Korean and German brands roll out of plants in Alabama, Ohio, Indiana or South Carolina.

Be realistic about the size of the benefit, too. The $10,000 is a ceiling on the interest you can deduct. It isn’t the tax you save, and few borrowers pay anywhere near that much interest in a year.

Take a $45,000 loan at 6.35% for 72 months, close to the average new-vehicle loan Experian reported for the second quarter of 2026. Interest in the first 12 months comes to about $2,700. In the 22% bracket, deducting it lowers your federal tax by roughly $590. In the 12% bracket, about $320.

That’s real money for filling out one section of one form, but it isn’t a reason to buy a car, and the rest of this article treats it that way.

The rules, as the IRS and Treasury wrote them

Treasury and the IRS published proposed rules on January 2, 2026, and final regulations in the Federal Register on September 8, 2026. They take effect November 9. Together with the statute and the IRS’s own summary, they give a fairly complete picture.

The vehicle. A car, minivan, van, SUV, pickup truck or motorcycle with a gross vehicle weight rating under 14,000 pounds, and final assembly in the United States. The weight rating is the maximum loaded weight printed on the driver’s door jamb, and everyday cars and SUVs come in far below the limit.

New only. The statute says the “original use” of the vehicle has to start with you. A used car doesn’t qualify, even if it’s new to you. A lease doesn’t, because lease financing is excluded outright, and buying out your own lease at the end of the term generally won’t qualify either. A dealer demonstrator can, since a car a dealer holds for sale isn’t treated as used by the dealer.

The loan. It has to be taken out after December 31, 2024, to buy the vehicle, and it has to be secured by a first lien on that vehicle, meaning the lender has first claim on it if you stop paying. A personal loan or a home equity loan used to buy a car won’t count under this provision. Neither will a loan from a relative or another related party; the statute excludes debt owed to a related person.

Personal use. The vehicle has to be bought for personal use, not for business. The final rules test this once, when you take out the loan, and don’t re-test it every year.

The years and the cap. Interest paid in 2025, 2026, 2027 and 2028 counts. After that, it doesn’t, unless Congress extends the law. No more than $10,000 of interest per return per year, whatever your filing status.

Does the income limit hit sooner than it looks?

If your income is anywhere near the threshold, yes. The deduction starts to shrink when your modified adjusted gross income (for most people, the adjusted gross income on their tax return) passes $100,000, or $200,000 on a joint return. Schedule 1-A spells out the math: for every $1,000 over the threshold, or any part of $1,000, you lose $200 of the deduction.

The rounding is what catches people. A single dollar past a $1,000 step costs the full $200 for that step. So an income of $100,001 on a single return already trims $200 off whatever interest you paid.

Most summaries say it’s gone at $150,000 single and $250,000 joint. That’s only true if you paid the full $10,000 in interest. The reduction comes off your actual interest, so an ordinary loan phases out much sooner.

Go back to the borrower with $2,700 in interest. Single, with income of $105,000, the excess is $5,000, the reduction is $1,000, and $1,700 stays deductible. At $112,400 the excess rounds up to 13 steps, the reduction is $2,600, and what’s left is $100. At $114,000 it’s zero.

For a typical loan, then, the deduction is gone about $14,000 above the threshold. If you’re anywhere near $100,000 single or $200,000 joint, I’d run the numbers before counting on it.

How to check if your vehicle passes

The IRS points to two sources for the assembly plant, and there’s a quick first look you can do yourself.

1. Read the window sticker. Every new vehicle on a dealer’s lot carries a sticker that lists the final assembly point. If you’re shopping now, take a photo of it. If you’ve already bought, it may still be in your paperwork.
2. Decode the VIN. The National Highway Traffic Safety Administration runs a free VIN decoder at vpic.nhtsa.dot.gov/decoder. Type in all 17 characters and look for the plant country, city and state. The final regulations describe using this site to confirm the plant.
3. Glance at the VIN yourself. Under federal VIN rules, the 11th character is a code for the plant of manufacture. Each automaker assigns its own plant codes, though, so the character alone tells you little, and the decoder is easier. You’ll also see advice that VINs starting with 1, 4 or 5 belong to U.S.-built vehicles. Treat that as a first glance, not proof, and confirm with the window sticker or the decoder.

Tax software walks you through all this, but it only knows what you type in. It can’t check where your vehicle was built, so do the VIN check before you enter anything.

Married couples don’t have to file jointly for this one. Schedule 1-A’s sections on tips, overtime and the senior deduction carry that warning, but the car loan section, Part IV, doesn’t, and the final regulations say filing status doesn’t affect eligibility. The $10,000 cap applies per return.

Already filed 2025 without it?

Plenty of people did. The deduction was new, lenders sent no tax form for 2025, and some buyers never learned their vehicle qualified.

You can still claim it on an amended return, Form 1040-X, with Schedule 1-A attached. Generally you have three years from the date you filed the original return, and a return filed before the April deadline counts as filed on the deadline. Weigh the effort against the benefit. Bought in October 2025? You may have paid only a few hundred dollars of interest that year, and the tax saved could be smaller than a preparer’s fee for the amendment. Bought in January 2025, with a full year of interest, and the amendment is more likely to pay for itself.

Mistakes that cost people the deduction

• Assuming the brand settles it. Only the assembly plant matters.
• Claiming a used car. “New to me” isn’t new.
• Claiming a lease. Lease payments include a finance charge, but the statute excludes lease financing.
• Deducting the whole payment. Only the interest counts, and it shrinks every year as the balance falls.
• Ignoring the income limit. With a typical loan, the deduction’s gone well before $150,000.
• Leaving off the VIN. The law requires it for every year you claim the deduction.
• Forgetting about your state. This is a federal deduction. Whether your state income tax follows it depends on the state.

Before you buy, or before you file

If you plan to buy before the end of 2028, the deduction is one more reason to read the assembly point on the window sticker while you compare deals on new cars. It shouldn’t decide the purchase, since on a typical loan it’s worth a few hundred dollars a year, and a better price on the car or a lower rate on the loan can easily be worth more than that. When two vehicles are otherwise close, though, the one built in a U.S. plant carries a small tax edge for the next few years. Lists of American-assembled models are easy to find, and the VIN decoder settles any doubt about a specific car.

The rate matters more than the deduction. A deduction gives back 12 to 24 cents of each interest dollar for many households; a lower rate means you never pay that dollar in the first place. Before you sign, get auto loan rate quotes from a credit union and a bank to hold up against the dealer’s. That’s where the bigger savings usually are.

If your return already includes other new deductions, such as the senior deduction, tips or overtime, they all go on the same Schedule 1-A. A tax preparer who’s filed these forms for a season can usually add the car loan section in a few minutes. If you need an amended 2025 return, ask about the fee first and compare it with the tax you’d get back.

Start with the registration card in your glove box. Put the VIN into the NHTSA decoder, and the plant line will tell you in about a minute if the rest of this is worth your time.