Who Qualifies for the Auto Loan Interest Deduction in 2026

Who qualifies for the auto loan interest deduction comes down to four tests you either pass or fail. The car has to be new with final assembly in the United States, the loan has to have started after 31 December 2024 and be secured by a first lien on that car, and your modified adjusted gross income has to be under $150,000 single or $250,000 joint. Clear all four and you can write off up to $10,000 of interest a year through tax year 2028. Almost nobody writes off anything close to $10,000.

The short version

The auto loan interest deduction covers new, US-assembled cars bought for personal use on a first-lien loan taken out after 31 December 2024. The cap is $10,000 of interest a year, per return, through 2028. It phases out between $100,000 and $150,000 of MAGI single, $200,000 and $250,000 joint. Leases and used cars are out.

Who qualifies for the auto loan interest deduction

The rules sit in section 163(h)(4), added by section 70203 of Public Law 119-21, signed 4 July 2025. Treasury finished the regulations this month. The final rule, T.D. 10054, was published in the Federal Register on 8 September 2026 at 91 FR 57214 and applies to tax years 2025 through 2028.

Here is what has to be true at the same time.

• The vehicle is a car, minivan, van, SUV, pickup truck or motorcycle. The regulations pin each of those to Environmental Protection Agency class definitions rather than to marketing names.
• Its gross vehicle weight rating is under 14,000 pounds.
• Final assembly happened in the United States.
• You are the first owner. Original use has to begin with you, so a used car never counts.
• You bought it for personal use, meaning you expect it to be driven for personal reasons more than half the time when you sign.
• The loan started after 31 December 2024 and is secured by a first lien on that vehicle. A personal loan, a credit card or a home equity draw fails, and the rules exclude loans from related parties under sections 267(b) and 707(b)(1).

Then the income test bites. The deduction drops by $200 for each $1,000 of MAGI above $100,000 single or $200,000 joint, and any fraction of $1,000 counts as a full $1,000. The IRS works its own example: a single filer with $124,200 of MAGI who paid $7,000 of interest is $24,200 over, which rounds up to 25 units, so the deduction falls by $5,000 to $2,000. At $150,000 single or $250,000 joint it is zero, and those thresholds are not indexed to inflation.

One trap. The $10,000 ceiling is per tax return, not per person and not per car. A married couple with two qualifying loans still shares one $10,000 limit.

How much is the car loan interest deduction worth

Less than the headline number suggests, and it is not close. Take the average new-car borrower. Experian’s State of the Automotive Finance Market report for Q2 2026 puts the average new-vehicle loan at $43,610 at 6.35% over an average term of 69.5 months.

Run that on a 70-month schedule and the payment is $747 a month. Interest in the first full year is $2,586. Over the entire loan, all 70 payments, you pay $8,688 in interest. The whole life of an average new-car loan produces less interest than the cap allows in a single year.

Now the tax. Say you are single, your MAGI is $85,000, and you bought in January 2026. That puts you in the 22% bracket, which starts at $50,400 of taxable income for 2026 under Revenue Procedure 2025-32. You are under the phase-out, so every dollar of interest is deductible until the provision expires after 2028.

$1,425 across three filing seasons, on a $43,610 loan. Drop to the 12% bracket and the same loan returns $777. Push your MAGI to $130,000 and the phase-out erases $6,000 of deduction a year, which for this loan leaves nothing. Your interest times your marginal rate is the whole calculation.

Which vehicles count as US assembled

Final assembly means the plant the car left with everything needed to make it run. Treasury’s analysis in the final rule estimates that about 60% of new vehicles sold here undergo US final assembly, and that roughly 6 million loans a year are written on them.

Brand tells you nothing. Treasury rejected a request to decide this at make-and-model level, noting that a model sold by a US-headquartered manufacturer can be built abroad and one from a foreign manufacturer can be built here. A Ford Maverick out of Hermosillo fails. A Chevrolet Trax out of South Korea fails. A Toyota Camry out of Georgetown, Kentucky passes. Two examples of the same trim can come from different plants, so check at the VIN.

Two ways to check, and the regulation blesses both.

• Type the 17-character VIN into the NHTSA VIN decoder and scroll to the Plant Information block at the bottom of the results. It lists the build plant and the plant country, as reported by the manufacturer.
• Read the final assembly point on the window sticker, the label required by 49 CFR 583.5(a)(3). On a Monroney label it sits in the parts-content block, usually a line reading “Final Assembly Point” with a city, state and country.

Do this before you sign. Ask the salesperson to print the window sticker for the specific stock number, not the model. On timing, our take on https://kwyper.com/should-i-buy-car-now-tariffs/ covers how import duties are moving prices across the same shortlist.

What you file, and what your lender sends you

The deduction goes in Part IV of Schedule 1-A, the form the IRS built for the four OBBBA deductions. Part I computes your MAGI, then Part IV applies the $10,000 cap and the phase-out. You enter the VIN of each qualifying vehicle. No VIN, no deduction.

Your lender does part of the work. Under new section 6050AA, anyone receiving $600 or more of interest on one of these loans in a trade or business must file Form 1098-VLI and send you a copy listing the interest, origination date, principal and the vehicle’s VIN. For 2025 the IRS allowed a plain statement instead under Notice 2025-57. From 2026 it is the real form, so expect one in your January 2027 mail.

Three edges worth knowing. Refinancing still qualifies, but only up to the outstanding balance of the old loan, so cash-out is not deductible. Negative equity rolled in from a trade-in is carved out, though your down payment hits the non-qualifying pieces first. Add-ons dealers habitually finance, GAP insurance, service contracts, sales tax, title and registration fees, do count.

Why this is worth far less than the credit it replaced

The same law that created this deduction killed the clean vehicle credits. Section 30D was worth up to $7,500 as a credit, a dollar-for-dollar cut in tax owed, and many buyers took it at the dealer as cash off the price. It ended for vehicles acquired after 30 September 2025, along with the $4,000 used-EV credit.

A $7,500 credit beats a $2,586 deduction by any measure, and it paid the same $7,500 in the 12% bracket as in the 24% one. The deduction hands a 22% filer 22 cents on the dollar. Our piece on https://kwyper.com/ev-tax-credit-2026-what-is-left/ covers what survived at state level. If this pushes you toward a two-year-old car instead, the deduction gives you nothing there, one reason https://kwyper.com/used-car-prices-late-2026/ looks the way it does.

I do not think the deduction should change which car you buy. A $30,000 US-built sedan and a $30,000 Mexican-built one differ by roughly $400 a year in tax at 22% on typical first-year interest. That is less than most people negotiate off the price in an afternoon.

FAQ

Does a used car qualify for the auto loan deduction?

No. The statute requires that original use of the vehicle begin with you, and the final regulations spell out that a purchaser who borrows does not start original use unless the loan documentation treats the vehicle as new. A one-year-old certified pre-owned car with 9,000 miles fails, however new it feels. Used clean vehicle credits are also gone, so there is no consolation prize.

Is the auto loan deduction above the line?

Not technically, though it behaves like one in the way that matters. It is a deduction subtracted from adjusted gross income to reach taxable income, allowed by section 63(b)(7) whether you itemize or take the standard deduction. But it does not reduce AGI itself, so it cannot pull your MAGI back under the phase-out threshold, and it will not help with anything else keyed to your AGI.

Can I deduct interest on a lease or a refinanced loan?

Lease payments never qualify, because you are not buying the vehicle and there is no first-lien purchase loan in your name. A refinance can qualify, but only if the new loan is secured by a first lien on the same vehicle, and only up to the balance outstanding when you refinance. Borrow more than that and the extra interest is not deductible.

Does a dealer demo car count as new?

Usually yes. The final regulations say original use of a demonstrator held primarily for sale and used for customer test drives does not begin with the dealer, so it can begin with you. A dealer loaner or shuttle vehicle is different: the dealer used it for its own business, original use started there, and the deduction is gone. Check how the loan paperwork describes it.

About this article: checked on 16 September 2026 against IRS newsroom guidance on the One, Big, Beautiful Bill deductions and Schedule 1-A, the final regulations at 91 FR 57214 (T.D. 10054, 8 September 2026), the NHTSA VIN decoder, Revenue Procedure 2025-32 for the 2026 brackets, and Experian’s Q2 2026 finance data. Loan figures are amortised from those averages, not quoted by a lender. This is general information, not tax advice; run your own numbers or ask a tax preparer before you sign.