The guide
How the car loan interest deduction works
From 2025 through 2028 you can deduct up to $10,000 a year of interest on a loan for a new car, SUV, pickup, van, minivan or motorcycle. The vehicle must have had its final assembly in the United States. You don't need to itemize. Most of the rules are about the loan and how you use the car. Three of them are about the vehicle, and your VIN can answer those three. On your tax return it's Part IV of Schedule 1-A (Form 1040), titled "No Tax on Car Loan Interest". The law behind it, Public Law 119-21, is commonly known as the One, Big, Beautiful Bill Act.
What this checker does
When you press Check my car, your browser sends the VIN to the free VIN decoder run by the National Highway Traffic Safety Administration (NHTSA), the lookup the Treasury and the IRS name in the final regulations. It reads back three fields and applies the rules:
Plant of manufacture. The rule lets you rely on "the vehicle's plant of manufacture as reported in the VIN." A plant in the United States passes. Anywhere else fails.
Gross vehicle weight rating (GVWR). It must be less than 14,000 lb. The lookup gives a weight class, not an exact number, so a Class 3 truck (10,001–14,000 lb) needs one more look at the door-jamb label.
Vehicle type. Car, minivan, van, SUV, pickup or motorcycle. We map NHTSA's body type to these six. Anything unclear is marked for review, never passed.
Then you answer the questions a VIN can't settle. The calculator applies the $10,000 cap, the income phase-out and the refinancing and negative-equity rules. Your answers and numbers stay in your browser.
The rules, with their source
Everything here comes from the final regulations, T.D. 10054, published in the Federal Register on Sep 8, 2026 (26 CFR §1.163-16), checked Sep 29, 2026.
- Built in the US
- Final assembly in the United States; you may rely on the plant in the VIN or the window-sticker final assembly point
- Motorcycles, and pickups or vans rated over 8,500 lb GVWR, may have no such label (49 CFR 583.3–583.4): for them the plant in the VIN is the route.
- §1.163-16(e)(3)
- Weight
- GVWR less than 14,000 lb
- §1.163-16(e)(1)(vi)
- New
- Original use starts with you; the loan papers treat it as new
- §1.163-16(e)(2)
- Personal use
- You expected more than 50% personal use when you took the loan
- §1.163-16(f)
- Loan
- Taken after Dec 31, 2024, secured by a first lien on the car, not a lease, not from a related party
- §1.163-16(c), (d)
- Cap
- $10,000 per return, regardless of filing status
- §1.163-16(h)(1)
- Phase-out
- Minus $200 for each $1,000 (or part of $1,000) of modified AGI over $100,000 ($200,000 joint)
- §1.163-16(h)(2)
- VIN on return
- You must report the VIN on your tax return
- §1.163-16(c)(5)
What counts as part of the loan. The price, sales tax, title and registration fees, warranties, service plans, GAP and credit insurance all count. Negative equity from a trade-in, a trailer, ordinary car insurance and cash back do not. Your down payment is applied to those non-qualifying amounts first, and interest is split pro rata.
What this checker can't tell you
- The VIN can't prove the car was new to you, how you use it, or how the loan is secured. Those answers are yours.
- NHTSA's data comes from the manufacturers. If the lookup has no plant, the regulations let you use the final assembly point on the window sticker instead. Motorcycles, and pickups or vans rated over 8,500 lb GVWR, may have no such label (49 CFR 583.3–583.4): for them the plant in the VIN is the route.
- The interest estimate uses a standard monthly schedule. Your lender accrues interest daily, so use the Form 1098-VLI figure when you have it.
- This is an estimate, not tax advice. The IRS, or your tax preparer applying the rules to your full return, gives the binding answer.
The first-character trap. Some sites say a VIN starting with 1, 4 or 5 means "made in the USA". That character only shows the region the maker's code belongs to. The rule uses the plant. We found the same model built in two countries (Tucson, Civic, Silverado, RAV4), so we always read the plant.
Heavy-duty pickups. Many heavy-duty pickups, including every 2026 Ford F-450 pickup according to Ford's own spec sheet, are rated at exactly 14,000 lb. That is not less than 14,000, so they don't qualify. The VIN lookup only says "Class 3: 10,001–14,000 lb", so we ask for the label figure.
Worked example
A single filer with a modified AGI of $112,400 buys a new Chevrolet Tahoe built in Arlington, Texas (Class 2F, 7,001–8,000 lb). The price with tax and fees is $68,000. The trade-in carries $3,000 of negative equity, and the buyer puts $2,000 down, so the loan is $69,000.
- The $2,000 down payment is applied to the $3,000 negative equity first. That leaves $1,000 of the loan that doesn't qualify, so $68,000 of $69,000 does.
- The Form 1098-VLI shows $4,140 of interest for the year. $4,140 × 68,000 ÷ 69,000 = $4,080 of qualifying interest, under the $10,000 cap.
- Income is $12,400 over $100,000. That's 13 started blocks of $1,000, and 13 × $200 = $2,600 of phase-out.
- Deduction: $4,080 − $2,600 = $1,480.
Section 179 and the "over 6,000 lb" rule
Business buyers ask a different question about the same number. A vehicle rated at 6,000 lb or less is a "passenger automobile" under 26 U.S.C. §280F(d)(5), with yearly depreciation caps. Heavier SUVs, pickups and vans escape those caps. Section 179 still limits heavy SUVs to $31,300 (2025) or $32,000 (2026) under §179(b)(5). Pickups with a bed of at least 6 feet inside, and some cargo vans, are outside that cap. The weight classes in the VIN lookup line up with 6,000 lb exactly, so the checker answers this too. Section 179 needs more than 50% business use, the opposite of the car loan deduction.
Frequently asked questions
Does the first character of the VIN tell me if my car was built in the USA?
No. The first character shows the region of the maker's code. The deduction uses the plant of manufacture reported in the VIN, which the NHTSA lookup returns separately. How to read the plant from a VIN.
My truck's weight rating is exactly 14,000 lb. Does it qualify?
No. The vehicle must have a gross vehicle weight rating of less than 14,000 pounds. A 14,000 lb truck, such as many heavy-duty pickups, does not qualify.
Do used cars qualify for the car loan interest deduction?
No. The original use of the vehicle has to start with you, and your loan papers have to treat it as a new vehicle.
Can I take the deduction if I don't itemize?
Yes. The deduction is allowed whether you itemize or take the standard deduction.
Where do I find how much interest I paid?
On Form 1098-VLI. Lenders that receive $600 or more of interest must send it by January 31 of the following year. Otherwise use your loan statements. For 2025, Notice 2025-57 lets lenders give you the interest total in a statement (online, monthly or annual) instead of the form.
What happens if I refinance my car loan?
The new loan still qualifies if it is secured by the same car, but only up to the balance of the old loan on the day you refinanced. Interest on any cash-out part does not count. It also only counts if the loan you refinanced qualified itself: taken after December 31, 2024, to buy the car new.
Which tax years does the deduction cover?
Tax years 2025 through 2028, for loans taken out after December 31, 2024.
Can I use Section 179 and the car loan interest deduction on the same vehicle?
Not in the same way at the same time. The car loan deduction needs more than 50% personal use; Section 179 on a vehicle needs more than 50% business use.
Where do I claim it on my tax return?
On Schedule 1-A (Form 1040), Part IV, "No Tax on Car Loan Interest". On the 2025 form you write the VIN on line 22 and the deduction is line 30. The 2026 draft moves Part IV to lines 28–36 and asks, for each vehicle, whether its final assembly was in the United States.
Why is my deduction $0 when my income is under $150,000?
The phase-out comes off your deduction, not off the $10,000 cap. At $120,000 of modified AGI it removes 20 × $200 = $4,000, so $2,044 of interest leaves $0. The calculator above shows the same steps.
Does a lease or a lease buyout qualify?
No. Lease payments aren't loan interest. Buying the car at the end of a lease doesn't count either: the leasing company was its first owner, so the car's original use didn't start with you.
Can I claim it if I'm married filing separately?
Yes. Filing status doesn't affect who can claim it. The phase-out starts at $100,000 of modified AGI for every filing status except married filing jointly, where it starts at $200,000.
Does my Toyota, Honda, Hyundai or Tesla qualify?
The brand doesn't decide it; the plant does. We decoded two 2026 RAV4s: one built in Georgetown, Kentucky, which passes, and one built in Woodstock, Ontario, which doesn't. Check your own VIN above.
Sources
- Car Loan Interest Deduction, final regulations, T.D. 10054, 91 FR 57214 (Sep 8, 2026), including the preamble on filing status, checked Sep 29, 2026
- IRS Schedule 1-A (Form 1040) 2025, Part IV, and the 2026 draft (posted Sep 4, 2026), checked Oct 1, 2026
- NHTSA vPIC VIN decoder API, checked Sep 29, 2026
- 26 U.S.C. §280F and §179, checked Sep 29, 2026
- Rev. Proc. 2024-40 and Rev. Proc. 2025-32 (SUV cap amounts), checked Sep 29, 2026