The IRS has announced the mileage rates that are to be used for business, medical, moving, and charitable driving in 2015. The rate for business driving increases from last year’s 56 cents a mile to 57.5 cents a mile. The rate for medical and moving mileage decreases from the prior year’s 23.5 cents a mile to 23 cents a mile. The general rate for charitable driving remains at 14 cents a mile.