2024 Mileage Rate Increase. The new mileage rate will go into effect on january 1, 2024. The increase goes into effect jan.
1, 2024, bringing the irs rate to 67 cents per mile driven for business use, the federal agency announced in a statement. The irs bumped up the optional mileage rate to 67 cents a mile in 2024 for business use, up from 65.5 cents for 2023.