State Of Illinois Mileage Rate 2024. On january 1, 2023, the gsa announced that the mileage reimbursement rate will increase from 62.5 cents per mile to 65.5 cents per mile effective january 1, 2023. Effective through april 30, 2024:
Other states and jurisdictions like. Calculating per diem reimbursements* for overnight domestic travel or for domestic travel lasting over 18 hours.