Irs Mileage Rate 2025 Increase. What is the 2025 federal mileage reimbursement rate? On december 14, 2023, the internal revenue service (irs) announced an increase in the optional standard mileage rate for tax year 2025.

The standard mileage rate for vehicles used for work, medical, and charitable purposes are as follows: For 2023, the standard mileage rate was 65.5.