Driving Home a Deduction: The New Auto Loan Interest Benefit

It is rare in the tax world that we get to announce a brand-new deduction specifically for personal expenses. Usually, interest deductions are reserved for mortgages or student loans, but a proposed regulation under the “One Big Beautiful Bill Act” is shifting gears for car buyers. Starting with loans originated after December 31, 2024, taxpayers may be able to write off interest paid on qualified passenger vehicles.

Living here in California, we know that a reliable vehicle isn’t a luxury—it’s a necessity. This new provision, effective for tax years 2025 through 2028, is designed to offer some relief to families purchasing new, American-assembled vehicles while encouraging domestic manufacturing.

The Breakdown: Who Can Claim It?

This deduction is available to individuals, certain trusts, estates, and disregarded entities. The best part? It is a “below-the-line” deduction. This means you do not have to itemize to take advantage of it; you can claim it in addition to your standard deduction. It functions as a reduction to taxable income on a new schedule filed with your Form 1040.

Father and toddler with a new family car

However, like most tax benefits, there are guardrails:

The Cap: You can claim up to $10,000 in interest per annual tax return. If you are married but filing separately, you and your spouse are each capped at $10,000.
Income Limits: High earners may see this benefit fade. The deduction phases out if your modified Adjusted Gross Income (AGI) exceeds $150,000 (or $250,000 for married couples filing jointly).

The “Made in America” Requirement

Not every car on the lot qualifies. To claim this write-off, the vehicle must be a new passenger vehicle (car, SUV, minivan, pickup, or motorcycle) with a gross weight rating under 14,000 pounds. Crucially, it must be assembled in the United States.

Before you sign the paperwork, you should verify the vehicle’s final assembly point using its VIN. You can check that status here: Welcome to VIN Decoding : provided by vPIC

Personal vs. Business Use

This deduction is primarily for personal use vehicles. At the time of purchase, you must anticipate using the car for personal purposes more than 50% of the time. The IRS offers some flexibility here: you are not required to adjust your estimate in future years even if your personal use drops below that threshold later on.

For our business owner clients at Christiansen Accounting who use vehicles for both work and personal life, the math gets a little more specific. You can still claim a business expense deduction for the portion of interest related to business use (on Schedule C, for example). However, that reduces the amount you can claim on the new personal deduction schedule proportionally. You cannot double-dip.

Man checking vehicle VIN on mobile device

Financing Rules Matter

The IRS is specific about where the money comes from. To qualify:

Standard Loans Only: The loan must be from an independent lender, like a bank or credit union, and secured by the vehicle.
No Family Deals: Interest on a loan from a family member does not qualify.
No Leases: Interest paid on leased vehicles is not deductible.
Refinancing: If you refinance, interest is only eligible on the balance that was outstanding at the time of the refinance.

Eligible expenses generally include interest on the purchase price, as well as interest linked to service plans, sales tax, and vehicle fees.

What to Expect for Documentation

Lenders will be required to file a new form, Form 1098-VLI, if you paid at least $600 in interest. This form will detail the borrower and loan specifics. For the 2025 tax year specifically, lenders are permitted to provide a simple statement showing interest paid instead of the official form.

This is a significant change with several moving parts. If you are planning to buy a vehicle soon and want to ensure you maximize this temporary tax break, let’s chat. Contact Christiansen Accounting today so we can help you navigate these new regulations effectively.

Share this article...

Facebook

Twitter WhatsApp LinkedIn Pinterest Reddit Email

Want tax & accounting tips and insights?

I confirm this is a service inquiry and not an advertising message or solicitation. By clicking “Submit”, I acknowledge and agree to the creation of an account and to the and .