For the first time in four decades, Americans who finance a new car can deduct the interest on their auto loan from their federal taxes. The provision, tucked into the One Big Beautiful Bill Act signed into law in 2025, revives a write-off that vanished after the Tax Reform Act of 1986 and gives qualifying buyers a deduction worth up to $10,000 per year for tax years 2025 through 2028.
The practical impact is significant. A buyer who finances a $45,000 pickup at 7% interest will pay roughly $6,300 in loan interest during the first full year. Deducting that amount could trim a federal tax bill by $1,300 to $1,500, depending on the filer’s bracket. For a household in the 22% bracket that hits the full $10,000 cap, the savings reach $2,200.
The deduction phases out for single filers with modified adjusted gross income above $100,000 and joint filers above $200,000, which effectively targets the benefit at middle-income households, the same group hit hardest by elevated borrowing costs. As of early 2025, the national average rate on a 60-month new-car loan hovered near 7.5%, according to Federal Reserve consumer credit data.
How the deduction works
The statutory text of H.R.1 (119th Congress) carves a temporary exception into Internal Revenue Code Section 163(h), the rule that has blocked individuals from deducting personal interest for nearly 40 years. The window covers tax years beginning after December 31, 2024, and before January 1, 2029, giving filers four annual chances to claim the deduction on returns for 2025, 2026, 2027, and 2028.
Treasury and the IRS labeled it the “No Tax on Car Loan Interest” deduction and published proposed regulations covering vehicle eligibility, assembly verification, loan structures, and the personal-use requirement, according to a joint Treasury and IRS announcement. Filers claim the deduction on a new form called Schedule 1-A, filed alongside Form 1040.
To qualify, a vehicle must meet all of the following conditions:
- New, not used. The original use of the vehicle must begin with the taxpayer claiming the deduction. Certified pre-owned vehicles do not qualify.
- Final assembly in the United States. Buyers can verify this through the NHTSA VIN decoder, which checks whether a vehicle identification number corresponds to a domestic assembly plant. Many popular models qualify, including the Toyota Camry (assembled in Georgetown, Ky.), Ford F-150 (Dearborn, Mich.), and Tesla Model Y (Austin, Texas), though assembly locations can shift between model years, so buyers should confirm before purchasing.
- Financed with a loan, not a lease. The taxpayer must be the legal owner for federal tax purposes. Lease payments do not contain deductible “interest” under this provision because the lessor, not the driver, holds title.
- Used primarily for personal purposes. If a car is partly used for business, the IRS requires taxpayers to split interest based on mileage. Only the personal-use share qualifies here; the business share may still be deductible under existing business-expense rules.
Who benefits most, and by how much
The deduction is “above the line,” meaning taxpayers can claim it whether they itemize or take the standard deduction. That distinction is critical: roughly 90% of filers choose the standard deduction, according to IRS Statistics of Income data. A below-the-line break would have been invisible to most of them.
The dollar savings scale with the filer’s marginal tax rate:
- A household in the 12% bracket deducting the full $10,000 cap saves $1,200 in federal tax.
- At the 22% bracket, the same deduction saves $2,200.
- Filers in the 24% bracket who remain under the income phase-out could save up to $2,400.
Because the benefit phases out above $100,000 single / $200,000 joint MAGI, higher earners in the 32% or 35% brackets are largely excluded by design.
Balloon loans and dealer financing can qualify as long as the loan documents clearly identify an interest component and the borrower is personally liable. Credit union loans are treated the same as bank loans for purposes of this deduction. Refinancings are eligible only to the extent they replace original principal and do not increase the loan balance beyond the purchase price plus sales tax and mandatory fees.
What remains uncertain
Even though the deduction has already been available for one full tax year, several practical questions still lack definitive answers as of June 2026. Final regulations have not yet been issued, and tax professionals are working from proposed rules and interim assumptions.
Phase-out calculations. The statute references “modified adjusted gross income” without specifying which add-backs apply. Tax advisers have flagged that common items, such as tax-exempt municipal bond interest or the foreign earned income exclusion, could push borderline filers above or below the threshold. Treasury has not yet published sample phase-out worksheets.
Documentation gaps. Unlike mortgage lenders, who issue Form 1098 each January showing interest paid, auto lenders are not required to send borrowers a standardized annual interest statement. Taxpayers may need to request an amortization schedule or calculate interest from monthly statements. Small discrepancies can arise if servicers use different day-count or compounding conventions, and the IRS has not said how much tolerance it will allow.
Midyear changes in vehicle use. The proposed regulations suggest prorating interest by miles driven in personal versus business categories, but they do not fully address scenarios where a commuter car becomes a rideshare vehicle partway through the year. Taxpayers should keep contemporaneous mileage logs or use trip-tracking apps to substantiate their allocation in case of audit.
Stacking with the EV tax credit. Buyers of qualifying electric vehicles may wonder whether they can pair this interest deduction with the Section 30D clean vehicle credit (up to $7,500). Nothing in the statute prohibits claiming both, and the IRS has not issued guidance restricting it. But final regulations could impose coordination rules, so buyers planning to claim both should monitor updates closely.
Why purchase timing carries real financial weight
The deduction expires after the 2028 tax year, and that hard sunset makes timing a genuine strategic decision. A buyer who finances a new truck in November 2028 can deduct interest paid during those final two months of the year (plus any interest from earlier months if the loan originated sooner). But a buyer who waits until January 2029 gets nothing, unless Congress extends or revises the provision in future legislation.
There is no guarantee of an extension. Treasury’s proposed regulations are written on the assumption that the current sunset dates will stand. Lawmakers could revisit the provision, but legislative calendars are unpredictable, and buyers who delay on the hope of renewal risk losing the benefit entirely.
The guardrails are clear: new, U.S.-assembled vehicles; personal use; a $10,000 annual cap; income-based phase-outs; and a four-year window that closes after 2028. The core mechanics are settled, but critical details on income measurement, lender reporting, and edge-case scenarios remain open. The gap between the promised relief and the relief that actually reaches a tax return will be decided in the fine print of final regulations that, as of June 2026, have yet to arrive.
Warren Cohen is a finance writer based in Phoenix, Arizona, covering personal finance topics including credit, banking, and beginner investing. He earned his degree in business administration from Arizona State University and began his career working in consumer finance, where he gained direct experience with lending and credit systems. He now writes for personal finance websites and fintech platforms, focusing on clear, practical content that helps readers make informed financial decisions.
