How does per diem work during PCS?
How does per diem work during PCS? You will be authorized one day of per diem for each 350 miles of official distance. For more information about mileage reimbursement, see our PCS: How to Calculate Mileage Rates page. Per diem: You and your dependents are authorized per diem for the allowed travel time.
Can you pocket per diem money?
Can you keep unused per diem? If your employer requires you to fill out a per diem expense report and reimburses your spending, then you won't have any leftover funds. But if your employer chooses to pay you a flat amount for per diem instead, then you're generally able to keep any money you don't use.