Calculate your Washington per diem.
Enter your travel dates and destination to see your lodging, meals, and incidentals allowance.
Calculate
How to use the per diem calculator
- Enter your travel details: Add your departure and return dates, then select your destination. Add multiple locations if your trip includes more than one destination.
- Understand expense categories: GSA rates cover lodging, meals, and incidental expenses (M&IE). Lodging rates may vary by season, while M&IE rates typically remain consistent.
- Get accurate estimates: The calculator uses the latest GSA rates to estimate your travel allowance.
Result
- Total days
- 0
- Trip total
- $0
- Lodging
- $0
- Meals
- $0
- Incidentals
- $0
You receive 75% of the daily M&IE rate on the first and last day of travel. Rates shown are the GSA maximums for your travel dates.
What is the per diem rate in Washington?
Washington follows the federal standard of $181 a day in FY2027 ($113 lodging, $68 M&IE) everywhere except 9 listed locations. Seattle is the costliest, at up to $347 a day combined. The rates apply through September 30, 2027.
After Seattle, the highest-rate Washington locations are Port Angeles / Port Townsend (up to $252 a night) and Olympia / Tumwater (up to $176 a night), plus 6 more. Rates follow the county, so a town inside a listed county gets that county's rate. Every other place in Washington uses the standard $181.
Lodging in some Washington locations changes by season. Seattle peaks at $255 from October 1 to October 31 and from June 1 to September 30 and drops to $188 from November 1 to May 31.
Use the Washington per diem calculator to add your dates and get the total for your trip.
Per diem rates in other states
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