Auto Loan Interest Deduction Calculator (OBBBA)

Who qualifies for the OBBBA auto loan interest deduction

The One Big Beautiful Bill Act (P.L. 119-21 §70203) created a federal income tax deduction for interest on qualifying vehicle loans, available for tax years 2025 through 2028. It is an above-the-line deduction, so you can claim it whether you take the standard deduction or itemize.

To qualify, every one of the following must be true:

• The vehicle's final assembly is in the United States. Brand and headquarters country do not matter; only the assembly plant on the VIN. You can check on the NHTSA VIN Decoder.
• The vehicle is new and original use begins with you. Used vehicles do not qualify.
• The vehicle is acquired for personal use. Business, fleet, and leased vehicles are ineligible.
• The loan originates after December 31, 2024, is secured by a lien on the vehicle, and comes from a qualified lender (bank, credit union, dealer-arranged financing). Loans from family, friends, or other related parties are excluded.
• The vehicle has a gross vehicle weight rating under 14,000 lbs and is a car, SUV, van, minivan, pick-up truck, or motorcycle.
• You are claiming for tax year 2025, 2026, 2027, or 2028.

How the $10,000 cap and MAGI phase-out work

There is a single dollar cap: $10,000 per return, regardless of filing status. That is a per-return cap, not per spouse and not per vehicle, so a joint return with two qualifying loans still tops out at $10,000 combined.

Above certain income levels, the MAGI phase-out reduces what you can claim:

• Phase-out threshold: $100,000 MAGI for single, head of household, and married filing separately filers; $200,000 MAGI for married filing jointly.
• Reduction: $200 for every $1,000 (or fraction) of MAGI over the threshold.
• Fully phased out: $150,000 MAGI single, head of household, or MFS; $250,000 MAGI joint.

Worked example, single filer at $120,000 MAGI. Excess over threshold is $20,000. Phase-out steps: ceiling($20,000 / $1,000) = 20. Reduction: 20 × $200 = $4,000. If you paid $5,000 of interest, capped at $5,000, your deductible interest is $5,000 - $4,000 = $1,000. At a 22% marginal rate, the federal tax savings are about $220.

Worked example, joint filer at $230,000 MAGI. Excess over threshold is $30,000. Steps: 30. Reduction: 30 × $200 = $6,000. If you paid the $10,000 cap, deductible interest is $10,000 - $6,000 = $4,000. At a 24% marginal rate, the federal tax savings are about $960.

What counts as a U.S.-assembled vehicle

The VIN drives eligibility. The 11th character of a VIN encodes the final-assembly plant; the NHTSA VIN Decoder will return the plant name and country. A few practical surprises:

• Many Japanese and Korean brands (Toyota, Honda, Hyundai, Subaru) assemble specific models in the U.S., and those VINs qualify.
• U.S. brands sometimes build in Mexico or Canada (a variety of Ford, GM, and Ram models). Those VINs do not qualify, even though the brand is American.
• The dealer label may not match the actual assembly plant; the VIN is the primary source.

Treasury and the IRS confirmed this VIN-based rule in their guidance under §70203 of the OBBBA.

Planning tips and what to bring to filing

For tax year 2026 and later, lenders will issue Form 1098-VLI reporting your qualified vehicle loan interest. For 2025, the IRS issued transition relief for lender reporting. If your lender does not send a statement, your loan documents and amortization schedule are the backup.

A few planning notes:

• You will need to report the VIN on the return when claiming the deduction.
• If you are close to a phase-out edge, above-the-line moves like an HSA contribution or a deductible IRA contribution can lower MAGI and unlock more of the deduction.
• The deduction stacks with other OBBBA above-the-line breaks: the No Tax on Overtime deduction and the No Tax on Tips deduction. The senior bonus deduction also runs in parallel.
• Plug the VIN, lender, and interest amount into the Tax47 app to see the deduction flow through to a complete refund estimate.

This calculator provides estimates only and is not tax or legal advice. Confirm your facts and figures with a qualified tax professional or the IRS before filing.