A: Using a vehicle in business is exceptionally common. There are two methods to calculate the deduction for business use of a vehicle, and each requires that you track both the miles you drove for business during the year, as well as the total miles the vehicle was driven in the year (business and personal combined, or total odometer roll). One method is the mileage method, which allows you to claim a standard amount per business mile driven. The other method is the actual expense method. This method allows you to claim actual operating costs such as fuel, insurance, repairs, etc. The amount of the deduction is the business use percentage (business miles divided by total miles), multiplied by each of the actual operating expenses. The actual expense method also allows you to include a deduction for depreciation based on the price you paid for the vehicle, taken over time.