Is Car Loan Interest Tax Deductible? The New $10,000 Deduction Explained (2026)

Yes, for the first time since the 1980s, interest on a personal car loan is tax deductible, up to $10,000 a year, but only under a narrow new rule. The One Big Beautiful Bill Act (OBBBA) created a deduction for interest on a loan taken out after December 31, 2024 to buy a new, US-assembled vehicle for personal use. It runs for tax years 2025 through 2028 and is available even if you take the standard deduction. Used cars, leases, and loans that existed before 2025 do not qualify.

Key takeaways:

• Cap: up to $10,000 of car loan interest per year, tax years 2025–2028, claimed on Schedule 1-A, Part IV, whether or not you itemize.
• The loan must be originated after December 31, 2024, be secured by a first lien on a new vehicle with final assembly in the United States, bought for personal use.
• Excluded: used vehicles, leases, and pre-2025 loans. Vehicles over 14,000 lbs GVWR do not count.
• Phase-out: starts at $100,000 MAGI (single) / $200,000 (MFJ), dropping $200 per $1,000 over. Gone at $150,000 / $250,000.
• Business use is a separate rule: if you drive the car for your business, the interest was already deductible on Schedule C, pro-rated by business-use percentage. That older rule did not change.

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Is Car Loan Interest Tax Deductible in 2026? What Changed

Personal car loan interest became deductible again in 2025, reversing a rule that stood for more than three decades. The Tax Reform Act of 1986 phased out the deduction for personal interest, and by 1991 interest on a car bought for personal use was fully nondeductible. Section 70203 of the One Big Beautiful Bill Act carved out an exception: a new above-the-line-style deduction for qualified passenger vehicle loan interest, described in the IRS car loan interest guidance.

The deduction is capped at $10,000 of interest per year and applies to tax years 2025 through 2028. It is available to itemizers and non-itemizers alike, so a buyer who takes the standard deduction still gets it. The catch is in the conditions, which are drawn tightly enough that many car buyers will not qualify.

The $10,000 Car Loan Interest Deduction: What Qualifies

A loan qualifies only if it clears every one of these tests, drawn from the proposed regulations under Treasury Regulation §1.163-16:

A qualifying loan can cover more than the sticker price. Under the proposed rules, it may include amounts customarily financed with the vehicle, such as sales tax, extended warranties, and vehicle service plans, as long as the whole amount sits under that first lien. Interest on all of it counts toward the $10,000 cap.

Run Your Own Loan Through the Rules

What Does NOT Qualify: Used Cars, Leases, and Pre-2025 Loans

Most of the disqualifiers catch common buying situations, which is why the negative list matters as much as the positive one.

Used Vehicles

Only a new vehicle qualifies. Buying a two-year-old certified pre-owned SUV with a loan, even a US-assembled one, produces no deduction under this rule. The vehicle must be on its first retail sale.

Leased Vehicles

Leases do not qualify. A lease is not a purchase secured by a lien in your name, so the "interest" baked into a lease payment is not deductible car loan interest. If you lease, this deduction is not available to you.

Loans That Existed Before 2025

The loan must be incurred after December 31, 2024. A car financed in 2023 or 2024 does not become deductible in 2026, even if you are still paying interest on it. The origination date, not the payment date, controls.

Heavy Vehicles Over 14,000 Pounds

A vehicle with a gross vehicle weight rating of 14,000 pounds or more falls outside the definition. Most large commercial trucks and some of the heaviest RVs exceed the limit and do not qualify.

Does Refinancing a Car Loan Still Qualify?

Refinancing keeps the deduction, but only for the balance you actually owed at the time you refinanced. Under Proposed Regulation §1.163-16(d)(4), interest on a refinanced qualifying loan remains deductible up to the amount of the loan being refinanced; any principal above that outstanding balance (a cash-out) does not qualify. The replacement loan must also be secured by a first lien on the same vehicle.

Consider Otis, who bought a new US-assembled truck in early 2025 with a $40,000 qualifying loan. In 2026 he refinances to a lower rate when $34,000 is still owed. If he refinances exactly $34,000 with a new first-lien loan on the truck, all of that interest still qualifies. If instead he rolls in $6,000 of other debt and refinances $40,000, the interest on the extra $6,000 does not qualify, because that principal exceeds the $34,000 he owed. Only the interest tied to the original outstanding balance carries the deduction forward.

The Income Phase-Out: $100,000 and $200,000 MAGI

The deduction phases out for higher earners, starting at $100,000 of modified adjusted gross income (MAGI) for single filers and $200,000 for joint filers. It drops $200 for every $1,000 of MAGI over the threshold.

Worked example (single filer). Vikram buys a new US-assembled SUV in 2026 and pays $6,500 of qualifying interest that year. His MAGI is $120,000, which is $20,000 over the $100,000 threshold. The reduction is $20,000 ÷ $1,000 × $200 = $4,000, so his deduction is $6,500 − $4,000 = $2,500. Because the reduction is $200 per $1,000 (twice the rate of the overtime and tip deductions), it bites fast: a single filer is fully phased out at $150,000 MAGI, and a joint filer at $250,000.

Personal Deduction vs Business Schedule C Interest: The Distinction Most Guides Miss

Here is the point almost every article skips: business-use auto loan interest was already deductible, and still is, through a completely separate door. If you are self-employed and use a vehicle for your business, you can deduct the business-use percentage of the car loan interest as a business expense on Schedule C, line 16b, under the long-standing rules in IRS Publication 463. That rule does not care whether the car is new, used, leased-to-own, or where it was assembled.

Consider Camila, who drives for a rideshare platform as a self-employed contractor and financed a used sedan. She gets nothing under the new personal deduction, because the car is used. But she uses it 70% for her rideshare work, so she deducts 70% of her car loan interest on Schedule C as a business expense, exactly as she could before OBBBA. A used car used for business still produces an interest deduction, just through the Schedule C door instead of the new one. The business vehicle tax deduction guide covers how to split business and personal use, the car mileage deduction guide explains how loan interest works alongside the standard mileage rate, and the mileage deduction calculator estimates the business-mileage side. A business buyer weighing a heavier vehicle may also look at first-year expensing in the Section 179 depreciation guide.

Mixed-use vehicles are more complicated. If you use a qualifying new car both personally and for business, the business share of the interest goes on Schedule C, and the treatment of the remaining personal share under the new $10,000 deduction is still being settled in the proposed regulations. Confirm that split against the final rules or a tax professional before claiming both.

How to Check If Your Vehicle Was Assembled in the United States

Final assembly is a hard requirement, and it is easy to verify before you buy. Two sources are authoritative under 49 CFR 565:

1. The window sticker (Monroney label). Every new vehicle on a dealer lot carries this label, and it lists the "Final Assembly Point." If it names a US location, the vehicle passes this test.
2. The NHTSA VIN Decoder. Enter the vehicle identification number at the National Highway Traffic Safety Administration (NHTSA) VIN Decoder to see the plant of manufacture. A US plant country confirms US final assembly.

Either source is acceptable. A model built in multiple countries can qualify or not depending on the specific unit, so check the VIN of the exact car you are financing, not the badge on the brand.

How to Claim the Car Loan Interest Deduction

Car loan interest is claimed in Part IV of Schedule 1-A (Form 1040), Additional Deductions, the same schedule that carries the tip deduction (Part II) and the overtime deduction (Part III). The total from Schedule 1-A flows to Form 1040, line 13b. Non-itemizers qualify, and like the standard deduction it reduces your taxable income but not your AGI.

Keep two records: proof the vehicle qualifies (the VIN, the window sticker's final assembly point, and a purchase date after December 31, 2024), and the year's interest total, which your lender is expected to report to you under the proposed rules. Enter the interest (up to $10,000) in Part IV, apply the MAGI phase-out if it reaches you, and carry the result forward.

Common Car Loan Interest Deduction Mistakes

• Claiming interest on a used car. Only a new, first-sale vehicle qualifies for the personal deduction. A used car qualifies only through Schedule C, and only for business use.
• Assuming your existing loan counts. A car financed before 2025 never qualifies, no matter how much interest you still pay.
• Skipping the final-assembly check. A US-brand vehicle can be assembled abroad. Verify the specific VIN, not the nameplate.
• Deducting lease payments. Leases have no qualifying lien and produce no deduction.
• Cash-out refinancing. Only the interest on the balance owed at refinancing carries over; interest on rolled-in extra debt does not.

Your Interest, Tracked All Year: How Jupid Helps

Separating deductible car loan interest from principal, and business-use interest from personal, is bookkeeping you do not want to reconstruct in April. Jupid does that bookkeeping as you go: an AI accountant working over WhatsApp and iMessage, connected to your bank and loan accounts, categorizing each payment automatically at 95.9% accuracy so the interest portion is tagged as it posts. Ask "how much car loan interest have I paid this year?" in chat and get a running total, split by business and personal use if you drive for work, ready to drop onto Schedule 1-A or Schedule C. Try Jupid.

Action Checklist

• Confirm the loan was taken out after December 31, 2024
• Verify the vehicle is new (first retail sale), not used or leased
• Check US final assembly via the window sticker or the NHTSA VIN Decoder
• Confirm the loan is secured by a first lien on the vehicle and the GVWR is under 14,000 lbs
• Check your MAGI against the $100,000 (single) / $200,000 (MFJ) phase-out
• If you use the car for business, split the interest and send the business share to Schedule C instead
• Enter qualifying interest (up to $10,000) in Part IV of Schedule 1-A

Sources

• IRS: Treasury, IRS provide guidance on the new deduction for car loan interest — $10,000 cap, origination date, new/US-assembled/personal-use rules
• Federal Register: Car Loan Interest Deduction (proposed regulations) — Treas. Reg. §1.163-16, refinancing rule §1.163-16(d)(4), first-lien requirement
• Schedule 1-A (Form 1040) — Part IV, car loan interest deduction
• IRS Publication 463 — business-use car loan interest on Schedule C
• NHTSA VIN Decoder — verifying US final assembly
• One Big Beautiful Bill Act (Public Law 119-21) — Section 70203, qualified passenger vehicle loan interest

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This guide is for general educational purposes and does not constitute tax, legal, or accounting advice. The car loan interest deduction is governed by proposed regulations that may change before they are finalized. For advice specific to your situation, consult a qualified tax professional.