Washington pitched it as a reason to walk into a showroom: finance a new American-built car and deduct the interest from your taxable income. In practice it works more like a coupon you find in the glovebox a year later.
What the law actually says
The provision lives in the tax code at 26 U.S.C. 163(h)(4). It lets you deduct up to $10,000 a year in interest on a loan for a qualifying vehicle, for tax years 2025 through 2028. The fine print is where the excitement leaks out:
- New only. The vehicle’s original use has to begin with you. Used cars, which make up the bulk of auto lending, don’t qualify.
- Assembled in the U.S. Final assembly has to happen here. Brand nationality doesn’t matter; plant location does.
- No leases, no fleet or commercial buys, no salvage titles, and no loans from relatives.
- Under 14,000 pounds GVWR, which covers cars, SUVs, pickups, vans and even motorcycles.
- Income limits. The cap shrinks by $200 for every $1,000 of modified AGI above $100,000, or $200,000 for joint filers. A single filer earning $150,000 is phased out entirely.
- VIN on your return. You have to report the vehicle identification number when you file.
Treasury and the IRS issued proposed regulations on December 31, 2025. They confirmed two important points. First, you don’t have to itemize to claim it. Second, lenders must file information returns reporting the interest they collected, a new paperwork burden on every bank, captive finance arm and credit union writing these loans.
Run the numbers
This is a deduction, not a credit. That distinction is the whole story.
Take a $40,000 new-car loan at 7% over 60 months. By my math, first-year interest comes to roughly $2,560. Deducting that saves you your marginal tax rate times $2,560:
Related Articles
- Trump’s Red Diesel Order Turns a 24.4-Cent Fuel Tax Into an IOU
- Police Say a Baker Act Patient Left a Hialeah Hospital, Took a Woman’s Nissan and Hit 85 MPH
- 12% bracket: about $307
- 22% bracket: about $563
- 24% bracket: about $614
That’s real money, but it shows up as a slightly bigger refund the following spring. It doesn’t touch your monthly payment, your rate or the out-the-door price. And because interest is front-loaded on an amortizing loan, the benefit shrinks every year you pay down the balance.
The people who’d gain the most are those carrying big balances at high rates, which is exactly the borrowing profile lenders and financial planners warn against. Meanwhile, the buyers with the clearest need for help, used-car shoppers, are excluded outright, and higher earners get phased out.
Why the showroom floor didn’t light up
From a dealer’s perspective, a benefit the customer can’t see at signing is a tough closer. Showroom deals get made on monthly payments. A tax break that arrives months later, varies by bracket and requires an accountant to explain doesn’t fit neatly on the four-square worksheet.
Lenders face their own math. They absorb new reporting obligations, need systems that track which loans qualify, and depend on assembly-location data. None of that generates a single extra loan.
How to check whether your car qualifies
Don’t trust the badge. Plenty of “domestic” nameplates are assembled in Mexico or Canada, and plenty of foreign brands build in Alabama, Kentucky or South Carolina.
Related Articles
- Chevy’s Pink Corvette Pace Car Pledges $500 Per Caution Lap to Fight Breast Cancer
- Ohio Cops Tracked a Stolen Kia With a GPS Dart. It Still Crashed Into 2 Cars in Dayton.
Your VIN tells the story. Under federal VIN rules, the 11th character identifies the assembly plant. NHTSA’s free VIN decoder translates it, and the window sticker also lists final assembly location.
Practical takeaways
- Buying new and U.S.-built? Claim it. Keep your loan contract and the lender’s year-end interest statement.
- Paying cash or close to it? Don’t take a loan just to chase the deduction. Paying $2,500 in interest to save $550 in tax is a losing trade.
- Refinancing? Under the statute, refinanced debt can still count, but only up to the original loan balance. Talk to a tax pro before assuming it carries over.
- Shopping in 2028? The provision expires after that tax year unless Congress extends it. A five-year loan signed then will only get one year of benefit.
This is a modest rebate on financing costs for a narrow slice of buyers. It isn’t a reason to buy a car, and it definitely isn’t a reason to buy one you can’t afford.
If you financed a new car this year, did you check where it was assembled before you signed, or are you finding out now?