No Tax on Car Loans Calculator: OBBBA Auto Loan Interest Deduction
Calculate your Schedule 1-A Part IV deduction. The OBBBA lets you deduct up to $10,000 per year in domestic auto loan interest — directly reducing your federal taxable income.
Auto Loan Interest Deduction
Enter your loan details below. The calculator estimates annual interest paid and computes your deduction (capped at $10,000/year) and federal tax savings.
What Qualifies for the Part IV Car Loan Deduction?
Under the IRS proposed regulations, the OBBBA Part IV deduction covers interest paid on a personal auto loan originated after December 31, 2024, for a vehicle manufactured primarily in the United States. The deduction is above-the-line (you do not need to itemize) and is capped at $10,000 per year. It phases out for taxpayers with MAGI over $100,000 (single) or $200,000 (married filing jointly). The deduction is available for tax years 2025 through 2028.
- Personal auto loan (not a lease)
- Vehicle manufactured primarily in the USA
- Loan originated after December 31, 2024
- Primary or secondary personal vehicle
- New or used vehicle
- MAGI under $100K (single) / $200K (MFJ)
- Vehicle leases
- Loans originated before January 1, 2025
- Business-use vehicles (use Schedule C instead)
- Foreign-manufactured vehicles
- Boats, RVs, motorcycles
- MAGI over phase-out threshold
Domestic vs. Imported: Which Vehicles Count?
Under the proposed regulations, the vehicle must be manufactured primarily in the United States. In practice, IRS guidance focuses on the final assembly location. A Toyota Camry assembled in Georgetown, KY qualifies. A Ford Explorer assembled in Canada does not.
The fastest way to verify: check the window sticker (Monroney label) for the "Final Assembly Point" line, or run your 17-digit VIN through the NHTSA VIN decoder. The first character of a VIN is also a clue: VINs starting with 1, 4, or 5 indicate US assembly.
How to Claim — Schedule 1-A Part IV
This deduction is filed using the new Schedule 1-A form and is available for tax years 2025 through 2028. Your loan must have been originated after December 31, 2024, and your MAGI must be below the phase-out threshold ($100,000 single / $200,000 MFJ).
- Get your interest statement. Your lender will send Form 1098 (Mortgage Interest Statement) or an equivalent annual auto loan statement showing total interest paid.
- Confirm domestic manufacturing. Check your Monroney label or use the NHTSA VIN tool to verify the vehicle was manufactured primarily in the USA.
- Check the phase-out. If your MAGI exceeds $100,000 (single) or $200,000 (married filing jointly), your deduction may be reduced or eliminated.
- Complete Schedule 1-A Part IV. Enter the lesser of your actual interest paid or $10,000. Attach Schedule 1-A to Form 1040.
- Carry to Schedule 1. The Part IV total flows into Schedule 1, Part II as an additional above-the-line deduction, reducing your adjusted gross income.
For the complete multi-part filing walkthrough, see the Schedule 1-A Filing Guide.
Frequently Asked Questions
Does the $10,000 cap apply per vehicle or per return?
The $10,000 cap applies per tax return, not per vehicle. If you have two qualifying domestic auto loans, you add the interest from both and claim the total (up to $10,000) on a single Schedule 1-A Part IV.
Can I deduct car loan interest if I also itemize deductions?
Yes. The Part IV deduction is an above-the-line adjustment to income, not an itemized deduction. You can claim it regardless of whether you take the standard deduction or itemize on Schedule A.
Is there an income limit for the car loan deduction?
Yes. Under the proposed regulations, the deduction phases out for taxpayers with modified adjusted gross income (MAGI) over $100,000 (single filers) or $200,000 (married filing jointly). If your MAGI exceeds these thresholds, your Part IV deduction may be reduced or eliminated entirely.
Does my existing car loan qualify?
Only loans originated after December 31, 2024 are eligible. If you took out your auto loan before that date, it does not qualify for the Part IV deduction — even if the vehicle itself was manufactured in the United States. The deduction applies to tax years 2025 through 2028.
My car was assembled partly in the US and partly in Mexico. Does it qualify?
No. The requirement is final assembly in the United States. Partial assembly or components manufactured in the USA do not satisfy the statute. Check the NHTSA VIN lookup or window sticker for the definitive answer on your specific vehicle.
See Your Full OBBBA Savings
Combine car loan interest with tips, overtime, and senior deductions on one Schedule 1-A estimate.
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