Mileage. Mileage Rate 57.5 cents per mile effective 01/01/2015. Texas State’s maximum mileage reimbursement rate for travel occurring on or after January 1, 2015, is 57.5 cents per mile. Mileage Rate 56 cents per mile effective 01/01/2014 - 12/31/2014. Texas State’s maximum mileage reimbursement rate for travel occurring between January 1, 2014 and December 31, 2014, was 56 cents per mile.