Per diem guides

Rules differ by profession. Start with a hub below, then run numbers in the matching calculator.

• Airline crew

  Contract per diem vs GSA M&IE, the 75% first/last-day rule, and multi-city layovers.

• Truck drivers

  IRS transportation industry rates, DOT 80% meal deduction, and how that differs from GSA.

• Travel nurses

  Housing and meal stipends vs GSA caps, and tax-home basics for 13-week assignments.

• Locum tenens

  Stipends vs GSA lodging and M&IE, and when a tax home still matters.

• Field sales

  Accountable-plan reimbursements using GSA rates, and territory trip basics.

• Police / law enforcement

  When per diem applies on department travel, and GSA vs agency policy.

• Hotel management

  Corporate travel against GSA lodging caps, and multi-property trips.