The IRS and the Department of the Treasury issued guidance on Dec. 31, 2025, regarding the deduction for car loan interest payments made by taxpayers.
The provision allows owners who bought vehicles with final assembly in the United States to deduct up to $10,000 in car loan interest from their taxable income for 2025 through 2028.
The deduction applies to interest paid on vehicle loans incurred after Dec. 31, 2024, for the purchase of new, made-in-America vehicles, the IRS said. The tax benefits apply to taxpayers who take the standard deduction and to those who itemize deductions.
The newly issued guidance provides clarity on the eligibility criteria for such deductions, including qualifying loans, the amount of interest paid, and whether the vehicle is bought for personal use.
As for the $10,000 max deduction limit, it applies only to federal tax returns, the guidance clarifies.
“If two taxpayers have a Federal income tax return filing status of married filing separately, the $10,000 limitation would apply separately to each taxpayer’s return,” it states.
If the modified adjusted gross income of a taxpayer for a year exceeds $100,000, the deduction limit decreases by $200 for every $1,000 in extra income. For married taxpayers filing a joint return, the cuts in deductions start once income exceeds $200,000.
The guidance clarifies that although eligibility for loan interest deduction requires that the vehicle be used for personal purposes, there is no insistence that a vehicle be purchased “exclusively” for personal use.
“Requiring taxpayers to make a determination regarding the exact amount of expected personal use and non-personal use is not administrable and may result in a considerable burden to taxpayers,” the guidance reads.
Tariffs and Vehicle Sales
In a July 15 post, the Institute on Taxation and Economic Policy had suggested that the One Big Beautiful Bill Act’s car loan interest deduction would not completely offset the higher auto prices triggered by the Trump administration’s tariffs on these items.“The deduction would offset only 36 [percent] to 43 percent of tariff-induced price increases for working-class families while buyers with higher incomes could see offsets ranging up to 85 percent,” the institute said.
“On a $40,000 vehicle, the net price increase would range from $201 to $879 for eligible claimants and would be $1,363 for car buyers ineligible for the deduction.”
However, recent estimates show no decline in car sales in the country despite the implementation of higher tariffs.







