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?
The OBBBA Part IV deduction covers interest paid on a personal auto loan for a vehicle with final assembly in the United States. The deduction is above-the-line (you do not need to itemize) and is capped at $10,000 per year. There is no income limit for Part IV.
- Personal auto loan (not a lease)
- Final assembly in the USA
- Primary or secondary personal vehicle
- New or used vehicle
- Vehicle leases
- Business-use vehicles (use Schedule C instead)
- Foreign-assembled vehicles
- Boats, RVs, motorcycles
Domestic vs. Imported: Which Vehicles Count?
The law requires final assembly — not just brand origin — to occur in the United States. 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
- 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 assembly. Check your Monroney label or use the NHTSA VIN tool to verify final assembly in the USA.
- 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.
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.
Open Schedule 1-A Calculator