Rather than keeping track of the actual cost of operating a vehicle, employees and self-employed taxpayers can use a standard mileage rate to compute their deduction related to using a vehicle for business. Likewise, standard mileage rates are available for computing the deduction when a vehicle is used for charitable, medical or moving purposes.
The 2015 standard mileage rates for use of a vehicle are 57.5 cents per mile for business miles (up from 56 cents per mile in 2014), 23 cents per mile for medical or moving purposes, and 14 cents per mile for rendering gratuitous services to a charitable organization.
The business standard mileage rate is considerably higher than the charitable and medical/moving rates because it contains a depreciation component. No depreciation is allowed for the charitable or medical/moving use of a vehicle.
In addition to deductions based on the business standard mileage rate, taxpayers may deduct the parking fees and tolls attributable to the business use of an automobile, as well as interest expense relating to the purchase of the automobile and state and local personal property taxes. However, employees using a vehicle to perform services as an employee cannot deduct interest expense related to that vehicle. Also, if the vehicle is operated less than 100% for business purposes, the taxpayer must allocate the business and non-business portion of the allowable taxes and interest deduction.