Understanding the Federal Auto Loan Interest DeductionNashua NH Resident Looks to Claim New Vehicle Tax Benefits

If you’re planning to purchase a new car, truck, or SUV, there’s a federal tax deduction worth knowing about. A tax law enacted in 2025 introduced a temporary deduction for interest paid on certain new vehicle loans, potentially reducing the cost of financing a qualifying purchase.

The deduction is available for tax years 2025 through 2028 and allows eligible taxpayers to deduct up to $10,000 annually in qualifying auto loan interest. However, not every new vehicle or financing arrangement qualifies.

A Nashua, NH resident was looking to purchase a new vehicle. Before heading to the dealership, he wanted to understand the requirements, income limits, and documentation needed to claim this tax benefit.

How Does the Auto Loan Interest Deduction Work?

Under the new rules, qualifying taxpayers can deduct interest paid on eligible loans used to purchase new vehicles for personal use. The maximum deduction is $10,000 per year, but that doesn’t mean everyone who purchases a new car receives a $10,000 tax break. The deduction applies only to qualifying interest actually paid during the tax year, not the vehicle’s purchase price or the principal portion of monthly loan payments. For example, if you pay $2,400 in eligible auto loan interest during 2026, your potential deduction is $2,400, assuming you meet all other requirements. Because this is a deduction rather than a tax credit, the actual savings depend on your tax situation and marginal tax rate.

Which Vehicles Qualify?

The deduction applies to certain new passenger vehicles purchased for personal use after December 31, 2024.

Eligible vehicles generally must meet these requirements:

• New vehicle: The vehicle must be purchased new, with its original use beginning with the taxpayer.
• Final assembly in the United States: The vehicle must have undergone final assembly in the U.S.
• Vehicle weight: The gross vehicle weight rating must be less than 14,000 pounds.
• Eligible vehicle type: Qualifying vehicles include cars, minivans, vans, SUVs, pickup trucks, and motorcycles.

Both gasoline-powered and electric vehicles may qualify if they meet the requirements.

A vehicle manufactured by an American brand doesn’t automatically qualify. Final assembly location matters, and different models or production runs may be assembled in different countries. You can check the vehicle identification number (VIN) using the National Highway Traffic Safety Administration’s VIN decoder or review the vehicle’s manufacturer information.

What About Used Cars and Leased Vehicles?

Used vehicles do not qualify for this deduction, even if purchased from a dealership. Leased vehicles are also excluded because the deduction applies to interest on qualifying purchase loans, not lease payments. Additionally, the loan must be secured by the vehicle and meet the applicable requirements. Interest on a personal loan that isn’t secured by the vehicle generally doesn’t qualify. Refinancing an eligible original loan may preserve the deduction, but only for interest on the qualifying refinanced balance.

Are There Income Limits?

The deduction begins to phase out for taxpayers whose modified adjusted gross income exceeds:

• $100,000 for single filers and most other filing statuses.
• $200,000 for married couples filing jointly.

The maximum deduction is reduced by $200 for each $1,000, or fraction thereof, that income exceeds the applicable threshold. These limits make it especially important to consider your income before assuming you’ll qualify for the full deduction.

Can You Claim It Without Itemizing?

One particularly useful feature is that eligible taxpayers can claim the auto loan interest deduction even if they take the standard deduction. This means homeowners and renters who don’t itemize may still benefit. However, the deduction is not available to married taxpayers filing separately, and taxpayers must include the required vehicle and loan information when claiming it.

What Records Should You Keep?

If you’re purchasing a qualifying vehicle, save your purchase agreement, financing documents, VIN, and records showing the amount of interest paid. Your lender may provide an annual statement reporting eligible interest. For the 2026 tax year, lenders generally have additional reporting obligations related to qualifying vehicle loan interest. Remember that your entire monthly car payment isn’t deductible. Only the qualifying interest portion counts.

After speaking to the team at Merrimack Tax Associates, the Nashua resident now has a good understanding of how his new vehicle purchase can affect his taxes down the road.