Pricing & Math
Is car loan interest tax deductible?
Car loan interest is deductible in two situations: a new federal deduction for personal-use vehicle loans (2025–2028, up to $10,000/year) under the "One Big Beautiful Bill" tax law, and the long-standing business-use deduction for self-employed and 1099 workers who use a vehicle for business. Interest on a loan for a personal-use vehicle was NOT deductible before 2025 — this is a genuinely new tax break, not a rule that's always existed.
The full picture
Until 2025, car loan interest on a personal-use vehicle was never tax-deductible — that changed with a new, temporary federal deduction for 2025–2028. Before this law, interest on a personal vehicle loan was treated as nondeductible personal interest under IRC §163(h), the same category as credit card interest. The tax law commonly called the "One Big Beautiful Bill" (Public Law 119-21, enacted 2025) created a brand-new deduction specifically for qualified passenger vehicle loan interest — separate from, and in addition to, the pre-existing business-use deduction available to self-employed and 1099 workers.
The new personal-use deduction (2025–2028)
- Cap: Up to $10,000 of qualifying interest per year, for tax years 2025 through 2028.
- No itemizing required. This is an above-the-line-style deduction available whether you take the standard deduction or itemize.
- Vehicle requirements: Must be a NEW passenger vehicle (car, minivan, van, SUV, pickup, or motorcycle) under 14,000 lbs gross vehicle weight rating, with final assembly in the United States. Used/pre-owned vehicles do not qualify.
- Loan requirements: The loan must be secured by a first lien on the vehicle and originated for a personal-use purchase, with interest accruing after December 31, 2024.
- Income phase-out: The deduction phases out — potentially to $0 — as modified adjusted gross income (MAGI) rises above $100,000 (single filers) or $200,000 (married filing jointly).
This is still a proposed regulation as of early 2026
The IRS issued proposed regulations for this deduction on December 31, 2025 (Federal Register, published January 2, 2026), with a public comment period running through February 2, 2026. The statutory cap, vehicle-eligibility framework, and income phase-out described above come from the underlying law itself, but exact documentation and verification procedures (e.g., how the IRS confirms US final assembly) were still being finalized as of this writing. Confirm current guidance at irs.gov before filing, and keep your loan documents, lender interest statements, and proof of US final assembly (window sticker or VIN decode) on hand.
The pre-existing business-use deduction
Separately, if you use a vehicle for business — including as a self-employed or 1099 contractor — the business-use share of car loan interest has long been deductible as an ordinary business expense, reported on Schedule C. This rule didn't change and isn't limited to $10,000. The mechanics: if you use the vehicle 100% for business, 100% of the interest is deductible; if you use it 60% for business and 40% personally, only 60% of the interest is deductible. You'll typically need to choose between deducting actual vehicle expenses (which includes loan interest, depreciation, gas, insurance, repairs — allocated by business-use percentage) or the IRS standard mileage rate, which already bakes an interest-equivalent into the per-mile figure. You can't double-dip both methods for the same vehicle in the same year.
Worked example — 1099 contractor
A rideshare driver finances a new, US-assembled vehicle with a $35,000 loan at 7% APR and drives it 70% for business, 30% personally. If they use the actual-expense method and pay roughly $2,300 in loan interest for the year, they can deduct 70% of that ($1,610) as a Schedule C business expense — regardless of the new $10,000 personal-use cap, since this is the separate, uncapped business deduction. If their MAGI is also under $100,000, the personal-use 30% portion of the interest may separately qualify for a share of the new deduction, subject to its own rules.
Sourced
- The Treasury and IRS issued guidance creating a new deduction for qualified passenger vehicle loan interest under the One, Big, Beautiful Bill, capped at $10,000 per year for tax years 2025–2028, available to both standard-deduction and itemizing filers. — IRS Newsroom
- Proposed regulations for the car loan interest deduction were published in the Federal Register on January 2, 2026, defining eligible vehicles (new, under 14,000 lbs GVWR, final assembly in the US) and the loan-lien requirement. — Federal Register
Key takeaways
- Before 2025, personal car loan interest was never deductible — this is a new, temporary (2025–2028) federal tax benefit.
- The new personal deduction caps at $10,000/year, requires a NEW US-assembled vehicle, and phases out above $100,000 MAGI (single) / $200,000 (married).
- Business/1099 use of a vehicle has a separate, uncapped deduction based on business-use percentage — unrelated to the new $10,000 cap.
- You generally can't deduct the same interest dollars under both the personal cap and the business Schedule C deduction — allocate by actual use.
- This is still within the proposed-regulation comment period as of early 2026 — verify current IRS guidance before filing.
Frequently asked questions
Does a leased car qualify for the new car loan interest deduction?
No. The new deduction applies to loan interest on a vehicle you purchase and finance with a loan secured by a first lien on the vehicle — lease payments are a different transaction type and aren't covered by this deduction.
Does a used car loan qualify for the new personal deduction?
No. The new personal-use deduction requires a NEW vehicle with final assembly in the United States. A used-car loan doesn't qualify for this deduction, though it could still be partly deductible if the vehicle is used for business.
What if my income is above the phase-out range?
If your MAGI exceeds $100,000 (single) or $200,000 (married filing jointly), the personal-use deduction reduces and can phase out entirely. The business-use deduction (for self-employed/1099 vehicle use) has no income limit — only your business-use percentage matters.
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Published 2026-08-17 · Updated 2026-08-17 · https://clearvaluelending.com/answers/is-car-loan-interest-tax-deductible