Under current federal income tax rules, so-called personal interest expense generally can’t be deducted. One big exception is qualified residence interest or home mortgage interest, which can be deducted, subject to some limitations, if you itemize deductions on your tax return. The One Big Beautiful Bill Act (OBBBA) adds another exception for eligible car loan interest. In tax law language, the new deduction is called qualified passenger vehicle loan interest. Are you eligible? Here are the rules. “No tax” isn’t an accurate description If you could deduct all your car loan interest, you’d be paying it with pre-tax dollars rather than with post-tax dollars — meaning after you paid your federal income tax bill. The new deduction has been called “no tax on car loan interest,” but...