Final assembly
VIN check for the car loan interest deduction
Direct answer: The IRS lets you rely on the vehicle’s final-assembly label or the plant of manufacture in the VIN; this page queries NHTSA’s public decoder in your browser and is a helper, not an IRS determination.
A vehicle whose final assembly did not occur in the United States is not an applicable passenger vehicle, so interest on its loan is not deductible under section 163(h)(4). The IRS says you can determine final assembly from the label on the vehicle or from the plant of manufacture in the VIN. NHTSA publishes that plant information through its vPIC decoder. The lookup below uses that public API from your browser.
---NHTSA vPIC
Check the VIN plant of manufacture
The IRS says you may rely on the plant of manufacture in the VIN, or on the final-assembly label on the vehicle. Results show as US plant reported, Non-US plant reported, or Unable to verify, and feed the U.S. final-assembly checklist answer when the calculator is on the same page.
Privacy: The VIN is sent from your browser to NHTSA’s public decoder. This site does not receive, log, or store the VIN.
What the result does and does not decide
A plant country of United States supports the final-assembly test the IRS describes. A plant country of Mexico, Canada, Japan, or anywhere else, including Puerto Rico, is not reported by NHTSA as the United States. This page treats only a United States plant country as a U.S. assembly signal. It does not decide close cases the decoder leaves blank. If the plant country is missing, use the label.
The weight class is a separate statutory test: gross vehicle weight rating under 14,000 pounds. NHTSA often returns a class band, such as 4,001–5,000 pounds. A band that stays under 14,000 pounds is consistent with the test. A band that starts at 14,001 pounds or more is not. A band that reaches 14,000 pounds, such as a class ending at 14,000, does not answer the question, because a vehicle at exactly 14,000 pounds fails the statute’s “less than 14,000 pounds” rule. The certification label has the rating for that vehicle.
The decoder also does not know whether the car was new to you, whether you expect personal use, whether the loan is a first lien, or whether final assembly in the statutory sense matches the plant that stamped the VIN. Those are on the eligibility page. The VIN you type is sent only to NHTSA, with no referrer, and it is not written into the page address.
Sources
- IRS newsroom: Working Families Tax Cuts. Qualified vehicle types, the VIN and label tests for final assembly, and refinance treatment.
- 2025 Instructions for Form 1040. Line 13b comes from Schedule 1-A, line 38. The Schedule 1-A instructions define QPVLI, personal use, and the phase-out.
- Final regulations, Car Loan Interest Deduction (Sept. 8, 2026). Treasury Decision published at 91 FR. Effective November 9, 2026. Treas. Reg. §§1.163-16 and 1.6050AA-1 apply to tax years 2025–2028.
- NHTSA VIN Decoder and vPIC API. Plant of manufacture. The IRS says taxpayers may rely on the VIN plant or the vehicle information label.
- Instructions for Form 1098-VLI (Rev. December 2026). IRS continuous-use instructions labeled December 2026 (HTML). Use for calendar year 2026 and later until superseded. PDF: irs.gov/pub/irs-pdf/i1098vli.pdf. About page last reviewed/updated by IRS on October 1, 2026. Who files, the $600-per-loan threshold, boxes 1–7.