Glossary
Every term from the car loan interest deduction, defined in plain English. Each definition links to the guide that covers it in depth.
A deduction reduces your taxable income; a credit reduces your tax bill dollar-for-dollar. The car loan interest break is a deduction: $2,000 deducted saves roughly $440 in the 22% bracket — not $2,000.
See what it's worth for you →The plant where the finished vehicle came off the line — the make-or-break test for eligibility. Determined by the VIN, not the brand: a Honda from Ohio passes, a Ford from Mexico fails.
Check yours by VIN →The statement your lender sends showing car loan interest paid during the year — the number you carry to Schedule 1-A. Expect it by late January, like a mortgage 1098.
Form 1098-VLI guide →Your AGI with certain items added back. For this deduction, MAGI decides the phase-out: it starts at $100,000 (single) or $200,000 (joint). For most filers MAGI ≈ AGI.
Run the phase-out math →The 2025 law that created the car loan interest deduction for tax years 2025–2028. Under current law the deduction expires after 2028 unless extended.
Full deduction guide →The income-based reduction: $200 less deduction for every $1,000 of MAGI over the threshold. It reaches $0 at $150,000 MAGI (single) or $250,000 (joint).
Where do you land? →The form where you claim the deduction — available whether or not you itemize. You'll need your 1098-VLI amount and the vehicle's VIN.
Line-by-line walkthrough →The 17-character code that identifies your exact vehicle, including its assembly plant. Position 11 encodes the plant; NHTSA's vPIC database decodes it — that's how our checker works.
Decode yours →