Unlike a mortgage, the interest on a car loan is not tax-deductible. In addition, you can’t deduct any expenses related to car ownership, including gas, maintenance, or mileage.
However, the situation changes if you own a business and use your car for business-related purposes. In this case, you can deduct:
You can also deduct a portion of these expenses if you use your car part of the time for business. Say you use your vehicle for 60% business and 40% personal. As a result, you could deduct 60% of these expenses on your taxes.