Gsa Per Diem 2025 Mileage Rate Calculator. Federal per diem rates are published each fiscal year on the general services administration website. This article will go over the gsa per diem rates, how they are calculated, reimbursement guidelines, and the distinctions between conus and oconus rates,.

Gsa last year announced per diem rates for federal employees traveling on official business in fiscal year 2025, which started october 1, including an increase from $107 to $110. Each october, this site is.