Free VIN Check + Car Loan Interest Deduction Calculator
Use this free car loan interest deduction calculator with built-in VIN check. Paste your VIN to verify US assembly using the official NHTSA database, then calculate your tax savings instantly.
Step 1: Free VIN check — where was your car assembled?
Step 2: Estimate your deduction and savings
How to check your VIN number
Your VIN is a 17 character code unique to your vehicle. You can find it in three places: on a small plate visible through the bottom left corner of your windshield, on a sticker inside the driver's door jamb, or on your vehicle registration and insurance documents. The VIN checker above sends your number directly to the official NHTSA VIN decoder, the same government database that dealers and manufacturers use. It tells you instantly where your car was assembled, the year, make, model, and plant location.
What the free VIN check tells you
The NHTSA VIN decoder reveals your vehicle's assembly country, plant city and state, model year, make, and model. For the car loan interest deduction, the assembly country is what matters. Only vehicles with final assembly in the United States qualify. A quick shortcut: if the first character of your VIN is 1, 4, or 5, the car was likely built in the US. A J means Japan, K means Korea, W means Germany, and 3 means Mexico. The VIN checker above confirms it for certain using the official database.
The rules made simple
The new law lets you deduct interest on a car loan. The cap is $10,000 of interest per year. It runs for tax years 2025 through 2028. You can claim it even with the standard deduction, using Schedule 1-A.
Your car must pass five tests
The vehicle must be new, not used. You must have bought it after December 31, 2024. It must be for personal use, not business. The loan must be secured by the car itself. And final assembly must have happened in the United States. The free VIN check above answers the last test using official government data.
The income phase out
The deduction drops by $200 for every $1,000 of income above $100,000. For married couples the limit is $200,000. It phases out fully at $150,000 single and $250,000 married.
One more thing
You must list your VIN on your tax return to claim this deduction. Your lender will send you a Form 1098-VLI showing the interest you paid.
Frequently asked questions
Is this VIN check really free?
Yes. The tool uses the official NHTSA government database which is free and public. Your VIN goes directly from your browser to NHTSA. Nothing is stored on this site. No signup, no email, no hidden fees.
What is a VIN number?
VIN stands for Vehicle Identification Number. It is a unique 17 character code assigned to every vehicle. It encodes the manufacturer, country of assembly, model year, and other details. You can find it on your dashboard, door jamb, or registration documents.
Do leases qualify for the car loan deduction?
No. The deduction applies to interest on a loan used to buy the vehicle. Lease payments do not qualify. Read more about leases, used cars, and refinancing.
Do used cars qualify?
No. The vehicle must be new and you must be its first owner. Certified pre-owned does not count. See the full used car rules.
Which cars are assembled in the US?
Many models from Toyota, Honda, BMW, Hyundai, and others are built in American plants. The brand does not matter, the plant does. See the full list of qualifying cars or check your VIN above.
Does the deduction double for married couples?
No. The $10,000 cap stays the same per return. Married couples get a higher income phase-out threshold. See what doubles for married couples.