2025 Mileage Reimbursement Rate Illinois 2025. Cities not appearing below may be located within a county for which rates are listed. Most companies opt for the standard mileage rate set by the internal revenue service (67 cents per mile for 2025).
Illinois employers can adopt this mileage reimbursement rate, providing a fair and consistent method that aligns with state guidelines. At the end of last year, the internal revenue service published the new mileage rates for 2025.