A provision inside the One Big Beautiful Bill Act lets car buyers deduct up to $10,000 a year in interest paid on a loan for a new vehicle assembled in the United States, according to Internal Revenue Service guidance on the law’s Working Families Tax Cuts. The deduction runs for tax years 2025 through 2028 and applies whether a taxpayer itemizes or claims the standard deduction. It phases out for higher earners, narrowing as income climbs past set thresholds. For a household weighing a car loan this year, the size of the break turns on two things the IRS spells out closely: where the vehicle was built, and how close the buyer’s income sits to those limits.
The Assembly and Ownership Rules Behind the $10,000 Cap
The deduction covers interest on a loan used to buy a car, minivan, van, SUV, pickup truck or motorcycle with a gross vehicle weight rating under 14,000 pounds, according to the IRS. The vehicle has to be new — its original use must start with the taxpayer claiming the deduction, which rules out used cars and demo models entirely. It also has to carry final assembly inside the United States, a condition the agency treats as its own separate test, independent of the brand on the badge or where the vehicle’s individual parts originate.
The loan itself carries conditions too. Treasury and IRS guidance on the provision states the debt must have originated after Dec. 31, 2024, and be secured by a first lien on the vehicle, meaning the car itself stands as collateral. Lease payments are excluded outright, so a driver leasing a U.S.-assembled truck gets none of the $10,000 ceiling no matter how much interest shows up on the lease statement. A buyer who refinances a qualifying loan generally keeps the deduction on the refinanced balance, the guidance adds, which keeps a rate-shopping borrower from losing the break by switching lenders mid-loan.
None of this shows up on a vehicle’s window sticker or in a dealer’s financing pitch, which puts the burden on the buyer to confirm final assembly in the United States before treating a car loan as tax-advantaged. A vehicle built abroad and merely badged, imported, or sold by a U.S.-headquartered company does not qualify, regardless of where the company is based or where its brand name originated. Confirming the plant of assembly, rather than trusting a sales floor’s claim, is the difference between a real deduction and a rejected one at filing time.
Free retirement updates: Keep more of your Social Security and savings with plain-English updates on the changes, deadlines, and costly mistakes retirees miss. Subscribe free.
Income Limits Narrow Who Actually Claims the Full Amount
The $10,000 ceiling is a maximum, not a guarantee, and the deduction phases out above income levels that will exclude a meaningful share of higher-earning households. The break shrinks for taxpayers with modified adjusted gross income above $100,000 for single filers and $200,000 for joint filers, reducing the available deduction as income climbs past those marks until it disappears entirely. A retiree drawing a pension alongside part-time income, or a dual-earner household near the joint threshold, needs to run the math before assuming the full $10,000 applies to a new loan.
Because the deduction is not tied to itemizing, the agency built it as an above-the-line write-off claimed on Schedule 1-A, a new form introduced specifically for the Working Families Tax Cuts provisions. That structure matters for the large share of filers who take the standard deduction and would otherwise see no benefit from vehicle loan interest at all — under the itemized-deduction rules that governed personal loan interest before this law, that group could not touch a car loan write-off no matter how much interest they paid.
The interest amount still has to be real and documented rather than estimated at tax time. Lenders that originate qualifying auto loans are expected to report the interest paid to both the borrower and the IRS, a structure similar to how mortgage lenders already report interest on Form 1098, giving the agency a paper trail to match against whatever a taxpayer claims on Schedule 1-A. The IRS has separately acknowledged lenders needed time to build that new reporting process, since the underlying deduction took effect for loans originated immediately after Dec. 31, 2024.
A Four-Year Window Tied to New Loan Originations
The deduction is temporary by design. It applies only to tax years 2025 through 2028, and only to loans originated after Dec. 31, 2024 — a buyer who financed a qualifying vehicle earlier does not get to claim interest paid before the law’s window opened. Absent further legislation, the provision is scheduled to lapse after the 2028 tax year, the same sunset structure Congress attached to several other Working Families Tax Cuts provisions inside the broader law.
That timing puts pressure on the calendar rather than on the purchase price alone. A buyer close to either income threshold, or choosing between a domestically assembled model and an imported equivalent, has roughly four tax years to capture the full value before the deduction disappears under current law. Because eligibility turns on the loan’s origination date rather than on when a vehicle is delivered, the paperwork trail — origination date, lien status, and the lender’s interest reporting — carries as much weight at filing time as the sticker price did at the dealership.
What the IRS has not yet detailed is how it will treat mixed-use financing, such as a note that bundles a qualifying vehicle’s price with an extended warranty or aftermarket accessories rolled into the same loan — an open question for a deduction that otherwise reads as narrowly and precisely drawn as any provision in the law.
This article was produced with the assistance of AI tools and reviewed against primary IRS sourcing for accuracy.
More Financial Reading
