Gsa Per Diem Rates 2024 Mileage. Click on any county for a detailed breakdown of the per diem rates. Washington — today, the u.s.

Beginning on january 1, 2024, the standard mileage rate for the use of a car (also vans, pickups or panel trucks) is 67 cents per. For 2023, the mileage rate is $0.655 per mile, and for.