Most calculators tell you what one tax year is worth. This one runs your loan across the entire 2025–2028 deduction window, applies the income phase-out year by year, and shows how much of your total loan interest never becomes deductible at all.
Quick answer: The deduction is capped at $10,000 of car loan interest per year for tax years 2025 through 2028, and it shrinks by $200 for every $1,000 of income above $100,000 (single) or $200,000 (joint). Because that reduction is subtracted from your actual interest and not from the $10,000 ceiling, a typical borrower paying $2,000–$3,000 of interest a year hits zero deduction far below the headline $150,000 cutoff.
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🚗 Your Loan
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🧾 Your Tax Situation
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A deduction is only possible if every eligibility condition holds at once. Leases never qualify, and neither does any used vehicle.
Tax Year
Interest Paid
Deduction Allowed
Tax Saved
Where Your Interest Actually Goes
Total interest over the whole loan
Interest paid inside the 2025–2028 window
Interest paid after 2028 (never deductible)
Lost to the income phase-out
Deduction you actually claim
⚠️ This is an estimate, not tax advice. It assumes a standard amortizing loan held to term with no extra payments, a single marginal rate applied to the whole deduction, and no state-level treatment. Your actual deduction depends on the interest your lender reports on Form 1098-VLI, your VIN's verified final assembly location, and your return as filed. Confirm your situation with a tax professional before relying on these numbers.
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Why a Single-Year Number Misleads You
Car loan interest is front-loaded: on a 60-month loan, the first year carries far more interest than the last. It also runs longer than the deduction does. The provision covers tax years 2025 through 2028 only, so a 60-month loan whose first payment lands in January 2026 pays interest through 2030 — and everything after 2028 is worth nothing on your return unless Congress extends the rule. On a $42,000 loan at 7.2%, that means roughly $8,100 of total interest of which about $6,700 falls inside the window. A one-year calculator can't show you that gap, which is exactly why this one runs the full amortization schedule.
How the Income Phase-Out Really Works
The reduction is $200 for every $1,000 (or part of $1,000) of MAGI above $100,000 for single filers or $200,000 for joint filers, and it is subtracted from the deduction itself rather than from the $10,000 ceiling. That distinction matters enormously. A single filer at $110,000 loses $2,000 of deduction each year — which barely dents a $10,000 claim but wipes out most of a $2,800 one. The commonly quoted $150,000 and $250,000 cutoffs only describe the point where even a maxed-out $10,000 deduction reaches zero. For a normal car loan, your personal cutoff arrives much earlier, and this calculator shows you where.
What Has to Be True to Claim It
The vehicle is new and you are its first owner. Used vehicles are excluded outright, no matter how the loan is structured.
Final assembly happened in the United States. The brand's nationality is irrelevant — an imported Ford fails and a Kentucky-built Toyota passes. A VIN beginning with 1, 4, or 5 indicates US assembly, and the window sticker's final assembly point or the NHTSA VIN decoder confirms it.
The loan was originated after December 31, 2024 and is secured by a first lien on that vehicle.
The vehicle is for personal use and rated under 14,000 pounds GVWR. Business, fleet, and salvage-title vehicles are out, as are loans from related parties.
Leases never qualify, because a lease is not a purchase and the payments are not loan interest.
You report the VIN on your return. The deduction is claimed on Schedule 1-A and is available whether or not you itemize, though it does not reduce your AGI.
Common Mistakes With This Topic
Treating the deduction as a credit. A $6,700 deduction at a 22% marginal rate is worth about $1,475, not $6,700.
Assuming you qualify because you're under $150,000. The phase-out is applied against your real interest figure, so most borrowers zero out well below that.
Stretching the term to harvest more interest. An 84-month loan does generate a bigger deduction than a 48-month one, but it costs thousands more in interest to get there — see the guide below for that math.
Skipping the VIN check before signing. Assembly location is decided at the factory, not at the dealership, and it cannot be fixed afterward.