The Per Diem Allowance. Each year the DoD Per Diem, Travel and Transportation Committee sets the Per Diem allowance. The Per Diem is specific to a given travel location and can range from a standard CONUS rate from $140 per day up to $702 per day for Out-of-CONUS rates.he per diem ta bles on this website have the PMRs already computed. The examples below using the Standard CONUS M&IE rate of $46.00 and the Standard GMR of $11.85 show how to compute a PMR amount. The $46.00 consists of $41.00 for meals and $5.00 for incidental expenses.