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Can I deduct my car loan interest?

As of Oct. 16, 2026

Short answer: Yes, if the vehicle is new, had its final assembly in the U.S., and you bought it mostly for personal use with a loan taken out after Dec. 31, 2024. For tax years 2025 through 2028 you can deduct up to $10,000 of the interest a year, even if you take the standard deduction. It shrinks by $200 for each $1,000 of modified AGI over $100,000 ($200,000 married filing jointly). Used cars and leases don't qualify, and the VIN must be on your return. Check your VIN · Figure your deduction.

Sources: Final regs (T.D. 10054) · IRS CP321N · IRS Pub. 6126

Best move: confirm the VIN, then claim it with the standard deduction

Check the VIN before you sign, keep your lender's interest statement, and enter the full VIN on Schedule 1-A. Two vehicles that look the same can differ: the deduction depends on where that VIN was assembled. A missing or wrong VIN is the first thing the IRS's CP321N notice flags.

The math:

  • $40,000 financed at 7.54% (the August 2026 bank average for a 60-month new-car loan, Fed G.19), 60 months, first payment Jan. 2026: about $802.28 a month and $2,783 of interest in 2026.
  • Single, MAGI $85,000: the full $2,783 is deductible; at a 22% bracket that's about $612 less federal income tax for 2026.
  • IRS example: single, MAGI $124,200, $7,000 of interest → $24,200 over, rounds up to 25 × $200 = $5,000 cut → $2,000 deductible. This page's math gives the same.
  • IRS example: $40,000 car, $6,000 negative equity rolled in, $4,000 down → the down payment covers $4,000 of the negative equity first, so $40,000 of the $42,000 loan counts.

Sources: Final regs (T.D. 10054) · Schedule 1-A · Notice 2025-57 · Fed G.19

A best fit for the situation described, not financial advice or a buy/sell recommendation. Partner links never change a pick.

Your roadmap

  1. Run the VIN check (below) or read the window sticker's “Final assembly point.”
  2. Read your contract: loan dated after Dec. 31, 2024, the vehicle listed as new, a lien to the lender.
  3. Get the interest figure: for 2025 lenders could show it on a portal or statement; for later years a lender that got $600+ files Form 1098-VLI and sends you a statement by Jan. 31.
  4. Claim it on Schedule 1-A, Part IV with the full VIN. It works with the standard deduction.
  5. Got a CP321N? Fix a missing VIN or wrong amount with an amended return (Form 1040-X).

The six tests, in plain English

TestWhat the final rules say
New to youOriginal use starts with you, and the loan papers treat it as new. Used cars don't qualify. A dealer demo can qualify; buying out a lease doesn't (the leasing company was the first user). A car you return within 30 days doesn't count as yours.
Made in the U.S.Final assembly in the United States. You can rely on the plant of manufacture in the VIN or the “final assembly point” on the window sticker (49 CFR 583.5(a)(3)). Brand doesn't matter; the plant does.
Type and weightCar, minivan, van, SUV, pickup truck or motorcycle with a gross vehicle weight rating under 14,000 lb, built for public roads.
Personal useWhen you take the loan you expect more than 50% personal use by you, your spouse or certain relatives. IRS example: 85% personal + 15% rideshare qualifies; 60% for your business doesn't.
The loanTaken out by you after Dec. 31, 2024 to buy the vehicle, secured by a first lien on it. Leases, credit-card purchases, loans from relatives, fleet, commercial, salvage-title and scrap vehicles don't count.
The years and the capTax years 2025–2028. Up to $10,000 per return, whatever your filing status (two cars on one joint return still share $10,000), minus $200 per $1,000 (or part) of MAGI over $100,000 / $200,000 joint.

Sources: Final regs (T.D. 10054) · IRS CP321N · IRS Pub. 6126. Final regulations published Sept. 8, 2026 and effective Nov. 9, 2026; they apply to tax years 2025–2028.

What part of a dealer loan counts (from the F&I office side)

Interest on the whole amount financed counts when it all relates to the vehicle. The final rules list: the price, extended warranties and service contracts, GAP, tire/wheel, paint and interior protection, key replacement plans, credit life/disability insurance, sales tax, title and registration fees, and accessories that are part of the vehicle. An IRS example includes a dealer doc fee.

What doesn't count: negative equity from a trade-in, cash back from the lender, regular collision/liability insurance, and anything unrelated like a trailer or boat. If those are rolled in, only the vehicle share of each interest payment counts. Your down payment is applied to the non-qualifying part first.

Refinancing: a refi secured by the same vehicle still counts, up to the old loan's balance. Cash-out above that doesn't. 0% APR deals: no interest means nothing to deduct, so compare the deal against a rebate the honest way: total cost, not the deduction.

Source: Final regs (T.D. 10054) (26 CFR 1.163-16(d)). Rolling negative equity or add-ons into a loan raises what you pay overall; the deduction gives back only a fraction of that interest.

IRS notice CP321N: what it means

The IRS sends CP321N when its first review of your 2025 Schedule 1-A finds a possible error in this deduction. The two problems it names: the deduction needs the complete VIN, and it is limited to the interest you actually paid. If you made a mistake, file an amended return (Form 1040-X, which can be e-filed if you e-filed), share the letter with your preparer, and check whether your state return needs amending too. If your claim was right, the IRS says to review it; ignoring an error can lead to more letters. Source: IRS CP321N

Before you amend, gather: the contract (date, new, lienholder), the VIN, the window sticker or VIN check showing U.S. assembly, and the lender's 2025 interest figure. Is this IRS letter real?

Where the interest number comes from

Sources: Notice 2025-57 · Final regs (T.D. 10054) · Schedule 1-A

Show me the details

How the calculator works

  1. Interest for the year: your number, or a monthly amortization of the loan grouped by calendar year (the rules accrue interest daily, so expect small differences).
  2. Qualifying share: (amount financed − non-qualifying amounts left after the down payment) ÷ amount financed (26 CFR 1.163-16(d)(2)(iii)).
  3. Cap: the smaller of that and $10,000.
  4. Phase-out: minus $200 × (MAGI over $100,000 or $200,000 joint, ÷ $1,000, rounded up).
  5. Savings estimate: deduction × the bracket you pick. A deduction lowers taxable income; it isn't a dollar-for-dollar credit.

Limits of this page

  • Federal income tax only; states decide on their own whether to follow it.
  • Business use: if you also deduct part of the interest as a business expense, the rules let you choose how to split it (26 CFR 1.163-16(g)); the calculator assumes all personal.
  • The VIN check can't confirm new vs. used, loan date or personal use, and NHTSA data can have gaps; the window sticker's final assembly point is the backup.
  • Not tax advice. Your tax software or preparer applies these rules to your full return.

Why trust this: built by someone with 11 years in dealership sales and management who has sat in the F&I office. Every rule links to the final regulations or the IRS page it comes from, and the calculator reproduces the regulations' own worked examples.

Not tax advice. We republish the federal rules with dates and do the arithmetic on what you type.

Sources & as-of dates

FAQ

Is car loan interest tax deductible in 2026?

Yes, for a new vehicle with U.S. final assembly bought mostly for personal use with a loan taken out after Dec. 31, 2024. Up to $10,000 a year for 2025 through 2028, reduced $200 per $1,000 of MAGI over $100,000 ($200,000 joint), whether or not you itemize.

Does a used car qualify for the car loan interest deduction?

No. Original use of the vehicle has to start with you, so used cars don't qualify. Buying out a lease doesn't either; a dealer demonstrator can.

How do I know if my car was assembled in the U.S.?

The IRS lets you rely on the plant of manufacture in the VIN (NHTSA's VIN decoder shows it) or the final assembly point on the window sticker. It depends on the specific vehicle, not the brand.

Can I deduct car loan interest if I take the standard deduction?

Yes. It's claimed on Schedule 1-A and is available to both itemizers and non-itemizers.

Does negative equity rolled into my car loan count?

No. Under the final rules, interest on negative equity, cash back and non-vehicle items doesn't count; only the vehicle share of the loan does. Warranties, GAP, service contracts, taxes and fees financed with the car do count.

What is IRS notice CP321N?

A letter saying the IRS's first review found a possible error in your car loan interest deduction, usually a missing or incomplete VIN or a deduction above the interest you paid. Fix errors with an amended return (Form 1040-X).

Do leases qualify for the car loan interest deduction?

No. Lease payments aren't loan interest on a purchase, so they don't qualify.

Estimates, not financial advice. Taxes, insurance, PMI and fees vary by lender, county and city; confirm with your lender, dealer and state agency before acting.