Interest on Car Loans Tax Deductible: A Comprehensive Guide

If you're a car owner, you're likely no stranger to the financial burden of car loans. In fact, the average person spends over $10,000 on interest alone over the life of a 5-year loan.

The good news is that the interest on your car loan may be tax deductible, which can help offset some of that financial strain. This can be a significant benefit, especially for those who use their vehicles for work or business purposes.

To qualify for this deduction, your car loan must be secured by the vehicle itself, and you must use the vehicle for business purposes. The amount of the deduction will depend on the percentage of business use, which can be calculated based on the number of miles driven for business versus personal use.

If this caught your attention, see: Tax Benefits of Leasing a Vehicle for Business

To qualify for the new auto loan tax break, you need to meet certain income and loan criteria. The tax break is available for qualified purchases made from 2025 through 2028.

Single filers with a modified adjusted gross income (MAGI) of $100,000 or less qualify for the full deduction. Married couples filing jointly must have MAGI of $200,000 or less. The deduction begins to phase out by $200 for every $1,000 over these limits and disappears entirely beyond certain thresholds.

The loan itself must also meet defined criteria to qualify for the additional interest deduction. The loan must be secured after December 31, 2024, or be a refinanced loan that meets the eligibility requirements.

A qualifying loan is one that is used for the purchase of an "applicable vehicle", as defined by the legislation, for personal use. The vehicle must not be a commercial vehicle, a lease financing, a vehicle with a salvage title, or a vehicle intended to be used for scrap or parts.

Here are the income limits for qualifying for the full deduction:

Note that deductions are based on your tax rate, so lower-income households may not see a significant benefit from the deduction.

The new car loan interest deduction is available to single filers with a modified adjusted gross income (MAGI) of $100,000 or less, who qualify for the full deduction.

Married couples filing jointly must have a MAGI of $200,000 or less to qualify for the full deduction. If you exceed these limits, the deduction begins to phase out by $200 for every $1,000 over these limits.

The deduction is retroactive, so any new car purchased after December 31, 2024, may qualify for both the new car loan interest deduction and the EV tax credit.

The EV tax credit can reduce your total tax bill dollar for dollar, and it's available for new qualifying electric vehicles purchased before September 30, 2025.

Here's a breakdown of how the car loan interest deduction and the EV tax credit work together:

For example, if you pay $1,200 in interest and are in the 12 percent tax bracket, you would save $144 with the car loan interest deduction.

If you're self-employed or own a business and use a vehicle for business purposes, you can claim a tax deduction for car loan interest.

You can't claim this deduction if you're an employee of someone else's business.

If the vehicle is used for both business and personal needs, you must determine the percentage of time it's driven for business reasons versus personal needs.

For instance, if you use the vehicle 50% of the time for business reasons, you can only deduct 50% of the loan interest on your tax returns.

You can write off 100% of your car interest costs for the year if you financed a business vehicle using your business name and made payments with your business bank account.

Lease payments can also be written off, but with limits.

If you choose to use the actual expenses method, you can deduct all eligible car expenses that were directly related to your work in that tax year, including auto loan interest.

Additional reading: Claim Insurance on Taxes

However, you can only write off the portion of the loan interest that was used for business.

As a freelancer, independent contractor, or small business owner, you may be able to write off some of the loan interest as a car-related business expense, even if you financed the car as a personal vehicle.

The amount you can deduct will depend on how you use your car.

For example, if your car use was 60% business and 40% personal, you can deduct only 60% of the amount of interest paid.

For your interest: Commercial Vehicle Loans

If you financed a personal vehicle, you might be able to write off some of the loan interest as a car-related business expense on Schedule C of your tax return.

You'll need to determine how you use your car, as the amount you can deduct will depend on it. For example, if your car use was 60% business and 40% personal, you can deduct only 60% of the amount of interest paid.

Tolls are a legitimate business expense, just like gas and licenses.

To avoid paying more in interest over time, choose a refinancing option that's right for you.

A different take: Can I Use 1031 Exchange to Pay off Mortgage

Auto loan interest is a finance charge you pay when borrowing money to finance a car purchase. There are different types of auto loans, including interest-free loans with a 0% annual percentage rate (APR).

The interest on an auto loan can add up over time, but it's typically lower than for unsecured loans since the car is usually pledged as collateral.

To qualify for the new auto loan interest deduction, you must meet income-based limits. Single filers with a modified adjusted gross income (MAGI) of $100,000 or less qualify for the full deduction, while married couples filing jointly must have a MAGI of $200,000 or less.

Here are the income limits for the auto loan interest deduction:

However, the deduction begins to phase out by $200 for every $1,000 over these limits, and disappears entirely beyond certain thresholds.

If you're planning to deduct interest on your car loan, you'll need to keep detailed records to prove your business use when filing your taxes. This is a crucial step to ensure you're eligible for the deduction.

The temporary tax deduction for auto loan interest applies to new vehicles purchased between January 2025 and December 2028, and it's only available for a limited time. This means you need to act quickly if you're considering purchasing a new car.

You can deduct up to $10,000 in interest from your auto loan for a qualifying car, but only a handful of purchases will qualify for the full deduction. This is due to the specific requirements and limitations of the legislation.

Here are some key details to keep in mind:

As a self-employed individual, you may be able to deduct all or a portion of your auto loan interest, depending on how many miles you drive for business vs. personal use. This can be a valuable write-off, but be sure to track your mileage and other expenses to file an accurate tax return.