FAQ’S

Yes. The OBBBA car loan interest deduction applies to a vehicle used primarily for personal use (generally, more than 50% personal use based on the taxpayer’s intent at the time the loan was originated). The vehicle may have some business use and still qualify, provided it is purchased for personal use.
This framing supports a binary eligibility test (personal-use vehicle) rather than a “prorate it between personal and business use” approach. So, if a vehicle is not primarily for personal use (i.e., it’s used more than 50% in a trade/business), it generally would not meet the “purchased for personal use” requirement for this specific deduction.