Auto Loan Interest Deduction: What the “One Big Beautiful Bill” Means for Car Buyers 

Recent federal legislation known as the “One Big Beautiful Bill” introduced a new, limited deduction for certain auto loan interest. For individuals and families who rely on personal vehicles for work and daily life, this change could influence purchasing and financing decisions. 

While the provision has generated headlines, the details matter.

Eligibility Hinges on Income and Vehicle Requirements 

The deduction applies only to interest on certain new vehicle loans, and taxpayers must meet income thresholds to qualify. The maximum annual deduction is $10,000.  The deduction phases out for taxpayers with modified adjusted gross income over $100,000 ($200,000 for joint filers). 

In addition, the vehicle itself must meet qualifying criteria. The vehicle must have a gross vehicle weight rating of less than 14,000 pounds and had final assembly in the United States.   

The loan must have originated after December 31, 2024, be used to purchase a new vehicle and the loan must be secured by a lien on the vehicle.  If a qualifying loan is refinanced, interest paid on the refinanced loan will also be eligible for the deduction.   

As with many new tax provisions, documentation will be important. Taxpayers should expect lenders to provide annual statements reflecting the amount of interest paid, similar to mortgage interest reporting. 

In order to verify final assembly, taxpayers can verify this using the vehicle labe, the vehicle identification number or using the VIN Decoder on the National Highway Traffic Safety Administration website. 

Why This Matters Now 

Auto prices and interest rates remain elevated compared to pre-pandemic levels. Even a partial interest deduction could help offset borrowing costs for eligible taxpayers.  

If you are considering purchasing a new vehicle or recently financed one, now is a good time to review how this change may apply to you. A conversation with your Brady Martz advisor can help clarify eligibility, documentation needs, and how this provision fits into your broader tax picture.