A vehicle purchase can now bring a federal income tax deduction for interest on the loan. But a familiar brand, a “new” listing at the dealership, or a large monthly payment does not establish that the interest qualifies.
The IRS has finalized regulations for the car loan interest deduction. Eligible taxpayers may deduct up to $10,000 of qualified interest annually for tax years 2025 through 2028, whether they itemize or take the standard deduction. The loan generally must have been incurred after December 31, 2024, to purchase a qualifying vehicle for personal use.
If you are comparing vehicles or financing options before the end of 2026, four checks can help you estimate whether the deduction has value.
Check the vehicle’s history, not just its model year
The vehicle’s original use must begin with you. Interest on a loan to buy a used vehicle generally does not qualify. Buying a vehicle you previously leased generally will not qualify either: you were already using it before the purchase.
An older model year is a different question. A prior-model-year vehicle can qualify if it had not previously been sold to a customer or put into use. A new, unsold 2025 model purchased in 2026 may therefore qualify if it meets the other requirements. Confirm the vehicle’s history with the seller before assuming that “last year’s model” means “used.”
Check final assembly using the specific VIN
The vehicle must have undergone final assembly in the United States. An American brand does not guarantee eligibility, and two vehicles bearing the same model name may have different assembly locations.
Ask for the vehicle identification number, or VIN, of the particular vehicle you plan to buy. Use the National Highway Traffic Safety Administration’s VIN Decoder to check its plant of manufacture, and retain the result with your purchase records. Check again if the dealer substitutes a different vehicle before delivery.
The rules cover qualifying cars, minivans, vans, SUVs, pickup trucks, and motorcycles with a gross vehicle weight rating under 14,000 pounds. The rules do not allow taxpayers to deduct lease payments even for qualifying vehicles.
Estimate the deduction before choosing how to pay
The deduction applies to interest paid, not the purchase price, down payment, or loan principal. Paying cash produces no car loan interest deduction. Financing may produce one, but the expected tax benefit should be weighed against the loan’s interest cost rather than treated as a reason to borrow.
The $10,000 annual limit applies per federal return, not per car. A couple filing jointly cannot claim a separate $10,000 limit for each spouse’s vehicle. Interest from multiple qualifying loans can be combined before applying the limit.
Income can reduce the benefit further. The deduction phases out when modified adjusted gross income exceeds $100,000, or $200,000 for joint filers. It falls by $200 for every $1,000, or portion of $1,000, above the applicable threshold. For example, the final regulations show a single filer with $7,000 of qualifying interest and $124,200 of modified adjusted gross income receiving a maximum deduction of $2,000. For some higher-income households, the phaseout will eliminate the deduction entirely.
Review what the loan finances
The final rules allow qualifying debt to include certain amounts customarily financed with the vehicle and directly related to its purchase. Examples include sales tax, vehicle-related fees, service plans, and extended warranties. Financing an unrelated item or paying off negative equity on a trade-in does not make interest on that portion of the debt qualifying interest.
Keep the sales contract and financing agreement so the amounts can be reviewed. Lenders that receive at least $600 of interest on a specified qualifying vehicle loan in a calendar year generally have information-reporting obligations, but taxpayers should also retain their own payment records and VIN.
How Aura Advisors can help with the car loan interest deduction
Before committing to a year-end purchase, confirm the vehicle’s original-use status and assembly location, then estimate interest you expect to pay in 2026 alongside your projected modified adjusted gross income. Those facts provide a clearer picture of the deduction than the advertised vehicle price or monthly payment.
Aura Advisors can help taxpayers compare purchase and financing choices, assess how the income phaseout affects the expected benefit, and document an eligible claim based on the vehicle and loan actually purchased.
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