2024 Mileage Rate Reimbursement. * airplane nautical miles (nms) should be converted into statute miles (sms) or regular miles when submitting a voucher using the formula (1 nm equals 1.15077945 sms). What is an allowance, a reimbursement or an accountable advance.

14 cents per mile for charitable purposes. (including for mileage at the standard federal mileage rate in effect at the time the mileage in incurred, parking, airline tickets, lodging, taxi or ride share, and/or a rental car).