Entering the final months of the year, the IRS just reminded dealers that some customers may be able to deduct their car loan interest on their taxes.

Driving the news: As part of the Working Families Tax Cuts passed by Congress in 2025, a tax deduction for interest on new vehicle purchases was included.

  • Eligible vehicles must be finally assembled in the United States.

  • The deduction phases out for single taxpayers with adjusted gross incomes over $100,000 and for joint filers over $200,000, by $200 for every $1,000 of income over that threshold.

First-year returns: At the end of the tax filing season in May, the IRS reported 1.4 million filers claimed the deduction on their 2025 returns.

The total deduction amount was $2.6 billion.

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Deeper look: The maximum for deductible interest is $10,000, but the real amount paid in interest on a $50,000 loan with a 10% interest rate would be roughly half, at no more than $5,000.

  • As a deduction, instead of a credit, that interest amount would be subject to the filer’s tax rate, which is 22% for single filers with incomes between $50,401 and $105,700.

  • At that tax rate, and under this scenario, the deduction would amount to a little more than $1,000.

Bottom line: The deduction is not going to make the final decision on purchasing a vehicle for the consumer with the overall benefit, but it could be worth a mention, being the equivalent of one payment (or more) off their taxes.

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