Per diems are an allowance paid to an employee when the employee is traveling for work. In the area of Microsoft Dynamics AX, you can create per diem rules for different traveling situations. Per diem rates can be set based on the time of year, the travel location, or both. When you are creating a per diem rule, you can select to withhold a percentage of a per diem rate if an employee receives complimentary meals or services. You can also set a minimum and maximum number of hours allowed for a per diem rate to apply to an employee's travel.