Car Loan Interest Is Tax-Deductible Again: How the OBBBA $10,000 Above-the-Line Deduction Works for U.S.-Assembled Vehicles From 2025 Through 2028

For almost four decades, personal car loan interest has been a non-deduction—dead weight in your budget that the IRS treated as nothing more than a personal expense. The Tax Reform Act of 1986 buried it, and three generations of car buyers grew up assuming auto loan interest was simply a cost of getting to work.

That assumption is now outdated. The One, Big, Beautiful Bill Act (OBBBA), signed into law on July 4, 2025, resurrects a piece of the pre-1986 world: an above-the-line deduction of up to $10,000 per year for interest paid on qualifying personal car loans. The catch—and there are several—is that the vehicle has to be new, it has to be assembled in the United States, the loan has to originate after December 31, 2024, and your income has to be below a phase-out threshold that starts biting at $100,000 (single) or $200,000 (joint).

If you bought, or are about to buy, a U.S.-built passenger vehicle, this deduction can quietly hand back hundreds—occasionally thousands—of dollars a year. But the rules are surprisingly granular, and the new Form 1098-VLI reporting regime adds wrinkles for both lenders and borrowers. Here is the full picture, written for someone who actually has to file the return.

The Headline Numbers, in One Paragraph

You may deduct up to $10,000 of qualified passenger vehicle loan interest per tax year, for the four tax years 2025, 2026, 2027, and 2028. It is an above-the-line deduction, meaning you can claim it whether you itemize on Schedule A or take the standard deduction. It reduces adjusted gross income (AGI) and therefore also reduces what counts toward several AGI-based phase-outs elsewhere on the return. The deduction is per return, not per vehicle, so financing two qualifying cars in the same household does not double the cap.

Which Vehicles Qualify

The statute defines a "qualified passenger vehicle" narrowly. To be eligible, every one of the following must be true:

New, not used. Demo vehicles, certified pre-owned, lease buy-outs, and inherited cars do not qualify. Original use must begin with the taxpayer.
For personal use. Vehicles purchased for business, fleet, rental, ride-share fleet operations, or commercial purposes are out. A self-employed driver who uses a car partly for personal commuting and partly for Uber will need to allocate, and only the personal-use portion of interest counts.
Gross vehicle weight rating (GVWR) under 14,000 pounds. This sweeps in essentially all passenger cars, minivans, SUVs, pickup trucks, and motorcycles, while excluding heavy-duty commercial trucks.
Final assembly in the United States. This is the rule that catches the most buyers off guard. The brand's nationality is irrelevant—a Toyota Camry assembled in Georgetown, Kentucky qualifies; a Ford Maverick assembled in Hermosillo, Mexico does not. A Tesla built in Fremont, California qualifies; a Tesla built in Shanghai for re-export does not.

You can confirm final assembly by checking the federal Monroney sticker on a new vehicle (the line is labeled "final assembly point") or by running the 17-character VIN through the National Highway Traffic Safety Administration's free VIN Decoder. As a shorthand, VINs that begin with 1, 4, or 5 generally indicate U.S. final assembly, while VINs beginning with 2 are Canadian, 3 are Mexican, J are Japanese, and W are German. The shorthand is reliable enough for a first pass, but the IRS validates the actual VIN against the NHTSA database when you e-file, so the sticker or decoder result is the binding answer.

Which Loans Qualify

The interest itself has to be on a specific kind of debt:

Originated after December 31, 2024. Interest you paid in 2025 on a loan you took out in 2023 is not deductible. The loan must be new money in the OBBBA window.
Secured by a first lien on the vehicle being purchased. Unsecured personal loans, HELOCs used to buy a car, and dealer-arranged second liens do not qualify. The lender has to have a first-priority security interest in that specific vehicle.
Used to acquire the vehicle. Cash-out refinancings of paid-off cars, or loans where most of the proceeds go to something other than the purchase, will be looked at carefully. Pure rate-and-term refinancings of an otherwise qualifying loan are fine, and the interest on the refinanced principal stays eligible.

The deduction covers interest "paid or accrued during the taxable year," which for most cash-basis individual borrowers simply means whatever interest you actually paid in 2025, 2026, 2027, or 2028. Prepaid interest and origination fees that are economically interest are pulled into the year they relate to under normal tax rules.

The MAGI Phase-Out: Where the Deduction Quietly Disappears

Even if your vehicle and loan check every box, the deduction shrinks once your modified adjusted gross income (MAGI) crosses a threshold. The reduction is $200 of deduction for every $1,000 of MAGI above the threshold.

Single, head of household, or married filing separately: phase-out begins at $100,000 MAGI. The deduction is fully wiped out at MAGI of $150,000 (50 × $1,000 × $200 = $10,000).
Married filing jointly or qualifying surviving spouse: phase-out begins at $200,000 MAGI. Fully eliminated at $250,000.

A quick worked example. Imagine you are single, earn $115,000 of MAGI in 2026, and paid $4,000 of interest on a qualifying loan. Your tentative deduction is $4,000. Your MAGI exceeds the threshold by $15,000, so the reduction is 15 × $200 = $3,000. Your allowed deduction is $4,000 − $3,000 = $1,000. At a 24% marginal bracket, that is $240 of cash tax savings—not nothing, but a far cry from the full benefit.

Two practical implications follow. First, the deduction is most valuable for working- and middle-class buyers. Second, anything you do to reduce MAGI before December 31—maximizing a traditional 401(k) contribution, a deductible IRA contribution, an HSA contribution—has a leverage effect: it can both save tax on the dollar contributed and unlock more of this deduction.

How to Claim It on Your Return

You can claim the deduction starting with the 2025 return that is filed in early 2026. The mechanics:

Compute your qualifying interest. Use the lender's year-end statement (in 2025, this is a generic information statement; in 2026 and later, it will be Form 1098-VLI—more on this below).
Apply the $10,000 cap and the MAGI phase-out.
Report the deduction on the appropriate line of Form 1040 / Schedule 1 (Additional Adjustments to Income). Specifically, OBBBA created a new adjustment line for car loan interest. Tax software will route it automatically; paper filers should follow the 2025 Schedule 1 instructions.
Enter the VIN on the return. This is mandatory. The IRS e-file system runs the VIN against the NHTSA database during return acceptance and will reject the deduction if the VIN is missing, malformed (fewer than 17 characters), or fails the U.S.-assembly check. If you bought two qualifying vehicles in the year, both VINs go on the return; the $10,000 cap is still aggregate.

Because the deduction is above-the-line, it lowers AGI, which is the number used to compute the AGI-based floor for medical expenses, the phase-outs for the child tax credit, the IRA deduction phase-out, the QBI taxable income limitations, and several state-tax calculations that key off federal AGI. The cascading benefit is real, especially for taxpayers sitting just over the cliff of another credit or deduction.

Form 1098-VLI: What Your Lender Has to Send You

Starting with interest received in 2026, lenders—including banks, credit unions, captive auto-finance arms, certain dealers, and loan servicers—must issue Form 1098-VLI, Vehicle Loan Interest Statement, to any individual borrower who paid $600 or more in interest during the calendar year on a qualifying loan. The form must be furnished by January 31 of the following year.

For tax year 2025 only, the IRS granted transitional relief. Lenders are not required to use Form 1098-VLI for the 2025 calendar year. Instead, they are considered compliant if they make a plain statement available to the borrower by January 31, 2026, showing the total interest received during 2025 on a qualified passenger vehicle loan. Many lenders are bundling this into the borrower's regular year-end statement.

When you do get a Form 1098-VLI (for 2026 and later), the key boxes are:

Box 1: Interest received — the dollar amount that flows to your return.
Box 2d: VIN — must be the full 17 characters; a blank, short, or mismatched VIN renders the form invalid for claiming the deduction.
Boxes identifying the loan origination date and lien status — used to confirm the post-2024 origination and first-lien requirements.

If your lender sends you a form with a missing or incorrect VIN, ask for a corrected one. The IRS is matching forms in bulk, and the VIN is the linchpin of the match.

Edge Cases Worth Knowing

A few situations come up repeatedly:

Refinanced loans. If you took out a qualifying loan in March 2025 and refinanced it in November 2026 to chase a lower rate, interest on the refinanced principal continues to qualify, provided the refi is still a first lien on the same vehicle and is not a cash-out of unrelated equity.
Leases. Leases do not qualify. Lease payments include a rent charge that is economically similar to interest, but it is not "interest on indebtedness secured by a first lien" because there is no consumer loan—the leasing company owns the car.
Co-signers and joint borrowers. The deduction is taken by the person legally obligated on the note who actually pays the interest. Putting your name on a child's loan to help them qualify, while they make the payments, generally does not let you claim the deduction.
Trade-in equity rolled into a new loan. If you finance a $40,000 vehicle with $5,000 of trade-in equity and a $35,000 new loan, only interest on the $35,000 is deductible. If you have negative equity rolled into the new note, the portion of the loan that finances the old car's deficit is not "for the purchase" of the qualifying vehicle and arguably is not eligible. Conservative practice is to allocate.
Multiple qualifying vehicles. No double-cap; $10,000 is per return. Spouses filing separately each get their own $10,000 cap on their respective returns, but the lower phase-out thresholds for MFS make this rarely advantageous.
State tax conformity. Many states piggyback on federal AGI. Because this is an above-the-line deduction, it usually flows automatically into states that conform. A handful of states decouple from new federal items; check your state's 2025 instructions before assuming the benefit doubles up.

A Step-by-Step Buying Checklist

If you are weighing a 2026 or 2027 vehicle purchase and want to make sure you capture the deduction, walk through this list before you sign:

Confirm U.S. final assembly. Look at the Monroney sticker line or run the VIN through the NHTSA decoder. Save a screenshot or photo for your records.
Confirm the vehicle is new. A dealer-titled demo unit with 8,000 miles is no longer "new" for tax purposes, even if the dealer markets it that way.
Confirm the loan structure. First lien, secured by the car, originated in your name after December 31, 2024.
Project your MAGI. If you are near the phase-out, consider whether boosting retirement or HSA contributions for the year will preserve more of the deduction.
Keep the year-end interest statement the lender sends. For 2025, expect a plain statement; for 2026+, expect Form 1098-VLI. File it with your tax records.
Enter the VIN on your return and double-check it matches the title and the lender's form.

How This Compares to Other Vehicle-Related Tax Breaks

This deduction stacks with—and is separate from—several other vehicle tax provisions:

Section 30D Clean Vehicle Credit (new EV/PHEV credit, up to $7,500): This is a credit, not a deduction, and applies only to qualifying electrified vehicles. A buyer can hit both: a U.S.-assembled qualifying EV financed with a new loan can produce the EV credit at the point of sale and ongoing interest deductions.
Section 25E Used Clean Vehicle Credit (up to $4,000 for qualifying used EVs): Used vehicles disqualify the OBBBA car-loan interest deduction, so these never overlap.
Section 179 / bonus depreciation for business vehicles: Business use is excluded from the OBBBA personal-vehicle deduction. A vehicle used 60% for business gets section 179 / bonus on the business portion and—at most—the OBBBA deduction on the 40% personal-use share of interest, with appropriate allocation.

A Word on Recordkeeping

The most boring part of this deduction is also where audits go to die: documentation. Keep, in a single folder for the life of the loan:

The window sticker showing final assembly location.
The bill of sale and title application showing the buyer.
The loan documents showing the first-lien position, origination date, and the borrower's name.
Every year-end interest statement or Form 1098-VLI.
Any refinancing paperwork.

These records cost you nothing to keep and resolve practically every question that comes up in a correspondence audit four years later.

Keep Your Finances Organized From Day One

A $10,000 deduction is only as good as the paperwork that supports it. Lenders, dealers, refinance servicers, and the IRS each generate their own statements, and tracking interest paid against a multi-year cap is exactly the kind of small recurring task that benefits from a clean, version-controlled record of every transaction. Beancount.io provides plain-text accounting that gives you full transparency and control over your financial data—every interest payment, every refinancing event, every tax-relevant footnote sits in human-readable files you actually own. Get started for free and see why developers and finance-minded households are switching to plain-text accounting for everything from car loans to crypto.