Government Mileage Rate 2025. The business rate increased by 3 cents per mile, from 67 to 70 cents per mile. The internal revenue service is increasing the optional standard mileage rate used to calculate tax deductions by 3 cents a mile for 2025.

A standard rate applies to most of conus. The attached document is classified by hmrc as guidance and contains information about rates and allowances for travel, including mileage and fuel allowances.