Gsa Per Diem 2024 Mileage 2024. For a full schedule of per diem rates by destination (broken down here. The per diem rate for fy 2024 will be $9 more than last year’s, going from $157 allowed per day to $166.

The rate table below shows the new rates that have been officially published on. Mileage rates are calculated and regulated on the federal level by the internal revenue service.