1. What is a Federal GSA Per Diem Calculator?

Definition: This calculator estimates travel reimbursement amounts based on the General Services Administration's (GSA) per diem rates for 2025.

Purpose: It helps government employees, contractors, and business travelers calculate their entitled meal and incidental expense (M&IE) allowances.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• Per Diem — Total reimbursement amount (dollars)
• Rate — Daily allowance rate (dollars/day)
• Days — Number of travel days (days)

Explanation: The daily rate is multiplied by the number of travel days to calculate the total reimbursement amount.

3. Importance of Per Diem Calculation

Details: Accurate per diem calculations ensure proper travel expense reimbursement while complying with federal regulations and avoiding overpayment.

4. Using the Calculator

Tips: Enter the current GSA per diem rate for your location and the number of travel days. All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: Where can I find current GSA per diem rates?
A: Visit the official GSA website at www.gsa.gov/perdiem for the latest rates by location.

Q2: Are rates different for different cities?
A: Yes, GSA establishes different rates for approximately 400 geographic areas in the continental U.S.

Q3: Does this include lodging expenses?
A: No, this calculator focuses on M&IE rates. Lodging is typically reimbursed separately at actual cost.

Q4: How are partial travel days calculated?
A: The first and last days of travel are typically reimbursed at 75% of the daily rate.

Q5: Are rates adjusted annually?
A: Yes, GSA reviews and updates rates each fiscal year (effective October 1).