Car Loan Interest Tax Deductible: How Much Can You Actually Save?
Under the One Big Beautiful Bill Act, you can deduct up to $10,000 in car loan interest per year — but your actual tax savings depend on your interest rate, loan balance, income level, and marginal tax bracket. A typical taxpayer with a $35,000 car loan at 6.5% interest could save between $800 and $2,200 per year in federal taxes. Use the calculator below to find your exact number.
This calculator provides estimates only and should not be considered tax advice. Consult a qualified tax professional for your specific situation.
Based on the One Big Beautiful Bill Act (OBBBA), signed July 4, 2025. This deduction is available for tax years 2025-2028.
Real-World Savings Examples
To understand what this deduction is worth in practice, let's walk through three common scenarios.
Scenario 1: A single filer earning $65,000 with a $30,000 car loan at 6.0% for 60 months pays approximately $1,800 in interest during the first year. At a 22% marginal tax rate, the deduction saves them about $396 in federal taxes.
Scenario 2: A married couple earning $150,000 jointly with a $45,000 truck loan at 7.0% for 72 months pays roughly $3,100 in interest the first year. At a 22% marginal rate, they save about $682.
Scenario 3: A single filer earning $85,000 with a $55,000 loan at 5.5% for 60 months pays about $3,000 in interest the first year. At a 22% marginal rate, their savings are approximately $660. But if they earned $125,000, the phase-out would reduce their deductible amount, lowering the savings.
Why Your Savings Are Highest in Year One
Car loan interest works on an amortization schedule — you pay more interest at the beginning of the loan and less toward the end. This means your deduction is most valuable in the first year or two of your loan.
For a $35,000 loan at 6.5% over 60 months, you might pay around $2,100 in interest the first year but only $450 in the final year. Plan accordingly — this deduction delivers the biggest benefit early in your loan term.
Maximizing Your Deduction
To get the most from this tax benefit:
- Consider financing rather than paying cash for a qualifying vehicle, even if you can afford to buy outright. The tax deduction effectively lowers your borrowing cost.
- Choose a loan term that balances monthly payments with interest deductibility. Longer loans mean more interest paid (and more to deduct), but you'll also pay more total interest.
- If you're near the income phase-out threshold, strategies like maximizing 401(k) contributions can lower your MAGI and preserve more of your deduction.
Car Loan Interest Deduction vs. Other Tax Benefits
This deduction stacks with other vehicle-related tax benefits. If you purchased an electric vehicle, you may also qualify for the EV tax credit (up to $7,500) in addition to the loan interest deduction. However, the car loan interest deduction cannot be combined with business use deductions for the same vehicle — you must choose one or the other.