Qualified passenger vehicle loan

Eligibility for the car loan interest deduction

Direct answer: The loan must be originated after December 31, 2024, for a new personal-use car, minivan, van, SUV, pickup, or motorcycle under 14,000 lb GVWR with U.S. final assembly, secured by a first lien. Used cars and leases do not qualify.

The deduction is available only when both the loan and the vehicle qualify. Failing one test takes that loan’s interest off Schedule 1-A. It does not stop a second loan on the same return from qualifying. The $10,000 cap and the MAGI phase-out are applied after you know which interest is qualified. They are not eligibility tests.

The vehicle

Section 163(h)(4)(D) defines an applicable passenger vehicle. All of these have to be true:

• Original use starts with you. The Form 1098-VLI instructions say original use begins with the first person who takes delivery after the vehicle is sold, registered, or titled, and the loan documents have to treat the vehicle as new. A used vehicle does not qualify. Dealer inventory held for sale does not start original use.
• It is manufactured primarily for use on public streets, roads, and highways, and it is not operated exclusively on rails.
• It has at least two wheels.
• It is a car, minivan, van, sport utility vehicle, pickup truck, or motorcycle.
• It is treated as a motor vehicle for purposes of title II of the Clean Air Act.
• Its gross vehicle weight rating is less than 14,000 pounds. Exactly 14,000 pounds does not qualify.
• Final assembly occurred in the United States. Section 163(h)(4)(E) defines final assembly as the process by which a manufacturer produces a vehicle at a plant, factory, or other place from which it is delivered to a dealer with all component parts necessary for mechanical operation, whether or not those parts are permanently installed.

The 2025 instructions and the IRS newsroom say you may rely on the final-assembly point on the label attached to the vehicle at the dealer, or on the plant of manufacture reported in the VIN under the NHTSA decoder. The VIN check on this site shows the plant country NHTSA returns. It does not photograph the label.

The loan

Interest is qualified only if it is paid or accrued on indebtedness incurred after December 31, 2024, for the purchase of that vehicle for personal use, secured by a first lien. The final regulations define a first lien as the first voluntary security interest, ignoring involuntary liens that later take temporary priority. A short delay in perfecting the lien under state law does not, by itself, disqualify interest from the origination date. If the lien is later released because the vehicle was repossessed or totaled and you still owe the loan, the regulations allow the interest to continue to qualify in those limited cases.

Personal use is tested when you incur the debt, not every later year. The final regulations say you meet it if, at that time, you expect the vehicle to be used for personal use by you, your spouse, or a person related to you under section 152(c)(2) or 152(d)(2), for more than 50 percent of the time you expect to own it. The 2025 instructions describe personal use as a use other than a trade or business, except that use while performing services as an employee counts as personal use, and other than use for the production of income. Their example is a rideshare car expected to be used to earn income 15 percent of the time and personally 85 percent of the time. That purchase is for personal use. A vehicle you expect to use mostly in a business is not.

You have to be an original obligor, unless you took the loan over because an obligor died. Buying a car “subject to” someone else’s loan does not move the deduction to you. A related-party lender, under section 267(b) or 707(b)(1), means the debt is not a specified passenger vehicle loan at all.

Excluded financing

Treas. Reg. §1.163-16 excludes interest on a loan to finance fleet sales, a loan for a commercial vehicle that is not used for personal purposes, any lease financing, a loan for a vehicle with a salvage title, and a loan for a vehicle intended to be used for scrap or parts. The lease example in the regulations is blunt: payments under a lease are not qualified even when the lease is properly viewed as a sale for other federal income-tax purposes.

Negative equity from a trade-in is not purchase indebtedness. A down payment is applied first against negative equity and other nonqualified amounts. Only the qualified slice of a mixed loan produces qualified interest, and payments of interest and principal are allocated pro rata.

Who can claim it

The final regulations say individuals, decedents’ estates, and nongrantor trusts may deduct it. A business entity cannot meet the personal-use test. A nonresident alien generally cannot deduct personal interest that is not connected with a U.S. trade or business; the IRS removed this deduction from the general 2025 Form 1040-NR discussion for that reason. The VIN has to be reported on the return for the year you claim the deduction. Without the VIN, the regulations say the interest is not treated as qualified.

The checklist inside the calculator follows these tests. “Not sure” keeps the dollars in a provisional total. “No” removes that loan.

Guided eligibility checklist

Work these in order. A single “no” removes that loan’s interest from Schedule 1-A. Each fail reason links to the primary IRS or Treasury source used on this site. The same questions appear inside the calculator; the VIN check can set the U.S. final-assembly answer when both tools are on one page.

1. New vs used. Original use must start with you (or your spouse on a joint return). Used vehicles fail. IRS Topic No. 505.
2. Loan after December 31, 2024. Indebtedness incurred on or before that date does not qualify. IRS Topic No. 505.
3. First lien. The loan must be secured by a first lien on the vehicle. Final regulations.
4. Personal use. At origination, expect personal use for more than half of ownership time. 2025 Form 1040 instructions.
5. U.S. final assembly. Confirm the dealer label or VIN plant of manufacture. IRS Working Families Tax Cuts.
6. Refinance. A refinance qualifies only for the outstanding principal of a loan that itself qualified; new cash-out generally does not. IRS newsroom.
7. Purchase, not lease. Lease financing is excluded even if recharacterized for other tax purposes. Treas. Reg. §1.163-16.