Is Car Loan Interest Tax Deductible in 2026?

The Tax Reform Act of 1986 eliminated the deduction for personal interest, including consumer credit card interest and personal auto loan interest.

As of 2026, personal auto loan interest remains non-deductible under IRC Section 163(h).

This rule applies whether you finance through a dealership, bank, credit union, or private lender.

Personal credit card interest tax deductible rules were similarly eliminated by the same 1986 reform — both types of consumer interest fell out of deductibility in the same legislative act.

The one form of consumer interest that remained deductible is qualifying mortgage interest — see our guide on the mortgage interest deduction for the rules that apply.

Self-employed individuals using their vehicle for business may deduct the business-use percentage of their car loan interest as a business expense on Schedule C.

This applies only when using the actual expense method, not the standard mileage rate.

The deductible interest percentage equals the percentage of total miles driven for business purposes during the tax year.

Self-employed individuals who deduct car loan interest under the actual expense method often also deduct the business portion of their car insurance deductible for self-employed workers, as both are eligible under the same actual expense framework.

If a vehicle is owned by a business entity (LLC, S-corp, C-corp, partnership) and used for business purposes, the vehicle loan interest is generally deductible as a business expense under IRC Section 162 as an ordinary and necessary business expense.

Personal use of business vehicles creates taxable fringe benefits that must be accounted for.

Business owners considering a vehicle purchase should understand how auto loan deductibility compares with other business financing costs — for instance, business credit card interest follows the same ordinary-and-necessary standard.

Taxpayers claiming vehicle business expense deductions must maintain adequate records under IRS requirements, including contemporaneous mileage logs documenting the date, destination, business purpose, and miles for each business trip.

Without documentation, deductions may be disallowed on audit.

The same documentation discipline that supports car insurance tax deductible claims for self-employed workers supports the car loan interest deduction as well — both rely on the verified business-use percentage.

Self-employed taxpayers managing multiple business deductions may benefit from working with an accountant to maximize Schedule C deductions accurately.