Per Diem Allowance Calculator

About this calculator

A per diem allowance is a fixed daily rate a traveler is paid to cover meals, lodging, and incidental expenses on a business trip, instead of submitting individual receipts for every purchase. Governments (such as the U.S. General Services Administration's GSA rates) and companies publish per diem tables by city or region, and travelers are simply reimbursed the standard amount for each day away.

This calculator totals a trip's allowance by paying full days at the full daily rate, while the first and last travel days — when time is spent in transit rather than at the destination — are paid at a reduced 75% rate, a common convention in corporate and government travel policies. It's used by finance and HR departments, travel coordinators, and employees preparing expense reports, letting them budget or reconcile a trip's cost without tracking every meal and taxi receipt.