Car Loan Interest Deduction Calculator 2026 — Up to $10,000

2026 New

Check whether your auto loan qualifies for the new interest deduction and what it saves. New vehicles with US final assembly and loans originated after 2024 only.

By Konstantin Iakovlev · Updated August 2026 · Source: IRS — Working Families Tax Cuts: deductions for workers and seniors

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$
Was the vehicle new when you bought it?
Final assembly in the United States?
Loan originated after December 31, 2024?

Deductible Interest

$2,400.00

Federal Tax Saved

$528.00

Interest Paid

$2,400.00

Cap and Phase-Out

Statutory cap on interest$10,000.00
Phase-out begins at$100,000.00
Reduction per $1,000 over$200.00
Cap after phase-out$10,000.00
Fully phased out at$150,000.00
Deduction claimed$2,400.00

Available whether or not you itemize. The vehicle must be new, assembled in the United States, under 14,000 pounds gross weight, and used personally rather than for business or fleet purposes; the loan must be secured by the vehicle. Leases and used cars never qualify, and refinancing an existing loan keeps the original origination date. You report the vehicle identification number on your return. Runs for tax years 2025 through 2028.

Use the Car Loan Interest Deduction Calculator 2026 — Up to $10,000 above to calculate your results. Enter your values and see instant results — all calculations run in your browser.

Disclaimer: This calculator is for informational purposes only and does not constitute tax, financial, or legal advice. Results are estimates based on the information you provide and current rates. Always consult a qualified tax professional or financial advisor for advice specific to your situation.

How It Works

For the first time since the Tax Reform Act of 1986 removed it, interest on a personal car loan is deductible again — up to $10,000 a year, for tax years 2025 through 2028. It is allowed whether or not you itemize, so it reaches ordinary buyers rather than only the minority who itemize. But the eligibility gate is narrow enough that the qualifying question matters far more than the arithmetic, and most cars on the road today do not pass it.

Five conditions all have to hold. The vehicle must be new when you bought it — a used car never qualifies, no matter how the loan is structured. Final assembly must have taken place in the United States, which is a plant location, not a badge: plenty of American brands assemble abroad and several foreign brands assemble in the States, so the vehicle identification number is the authority. Gross vehicle weight must be under 14,000 pounds, which covers cars, minivans, SUVs, pickups and motorcycles. The vehicle must be for personal use, so business and fleet purchases are out. And the loan must have originated after December 31, 2024 and be secured by the vehicle itself — a personal loan or a home equity draw used to buy a car does not count, and neither does a lease, because there is no loan.

The phase-out is much steeper than the other deductions in this family. Above $100,000 of modified adjusted gross income ($200,000 on a joint return), the $10,000 cap drops by $200 for every $1,000 of income, twice the rate that applies to tips and overtime. The whole deduction is therefore gone across a $50,000 band: zero at $150,000 for single filers, $250,000 for joint filers.

In practice the benefit is front-loaded and modest. Interest is heaviest in the first year or two of a loan and declines as principal is repaid, so a $40,000 loan at 7% pays roughly $2,700 of interest in year one and under $1,000 by year five. At a 22% marginal rate, that first year is worth about $600 and the fifth about $200. It is real money, but it is not a reason to choose a larger loan — you are still paying a dollar of interest to save twenty-two cents. You report the vehicle identification number on your return, and your lender reports the interest.

Example: $2,400 of interest on a new US-assembled SUV, $90,000 income, single filer

  1. 1 Step 1: Check the gate. The vehicle is new, final assembly was in the United States, it is under 14,000 pounds, it is for personal use, and the loan originated in 2025 and is secured by the car. All five conditions hold.
  2. 2 Step 2: Modified adjusted gross income of $90,000 is below the $100,000 threshold, so the $10,000 cap is not reduced.
  3. 3 Step 3: The deduction is the lesser of interest actually paid and the cap: $2,400 versus $10,000, so $2,400.
  4. 4 Step 4: Taxable income before the deduction is $90,000 − $16,100 = $73,900, which puts the top dollars in the 22% bracket. Removing $2,400 saves $2,400 × 22% = $528.
  5. 5 Step 5: For contrast, at $130,000 of income the cap would fall by 30 × $200 = $6,000 to $4,000 — still above this $2,400 of interest, so the deduction would be unchanged. Only at incomes near $150,000 does the cap start binding on a loan this size.

Source: IRS — Working Families Tax Cuts: deductions for workers and seniors · Last updated: August 2026

Frequently Asked Questions

Does a used car qualify for the car loan interest deduction?
No. The vehicle must be new at the time of purchase. This is the condition that disqualifies the largest number of buyers, since used vehicles make up the majority of car sales.
How do I know if my car had final assembly in the United States?
It is determined by the assembly plant, not the brand. The vehicle identification number identifies the plant, and the Department of Energy publishes a lookup tool. Several foreign brands assemble in the United States and several American brands assemble in Mexico or Canada, so the badge tells you nothing.
Does a leased vehicle qualify?
No. The deduction requires a loan secured by the vehicle, and a lease is not a loan. Nor does a personal loan or a home equity draw used to buy a car, because those are not secured by the vehicle itself.
What if I refinance the loan?
Refinancing does not reset the origination date. A loan that originated before January 1, 2025 remains ineligible after refinancing, and a qualifying loan generally keeps its eligibility, provided the refinanced loan is still secured by the same vehicle.
Do I need to itemize to claim it?
No. It is available alongside the standard deduction, which is what distinguishes it from the mortgage interest deduction.
At what income does it phase out?
The $10,000 cap falls by $200 for every $1,000 of modified adjusted gross income above $100,000 single or $200,000 joint, reaching zero at $150,000 and $250,000 respectively — a steeper slope than the tips or overtime deductions.
Is it worth taking a bigger loan to get a bigger deduction?
No. You pay a dollar of interest to save your marginal rate on that dollar — about 22 cents for a typical middle-income buyer. Borrowing more to deduct more leaves you worse off by the other 78 cents.

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