GSA Per Diem Calculator
Estimate an overnight CONUS trip using the applicable GSA lodging and meals & incidental expenses (M&IE) rates for FY 2026 or FY 2027.
How to use this calculator
Use GSA’s official per diem lookup to find the lodging and M&IE rates for the traveler’s destination and fiscal year, then enter those rates here. The calculator adds lodging and M&IE and can apply the federal first/last-day M&IE rule.
Standard CONUS rates
FY 2026: standard lodging $110; standard M&IE $68. Effective October 1, 2025 through September 30, 2026.
FY 2027: standard lodging $113; standard M&IE $68. Effective October 1, 2026 through September 30, 2027.
Non-standard areas may have higher lodging and M&IE rates. Look up the official GSA rate for a destination.
Calculation method
- Lodging = lodging rate × lodging nights.
- Full-rate M&IE = M&IE rate × eligible travel days.
- When first/last-day treatment is enabled, the first and last travel days use 75% of the M&IE rate.
- Total estimate = lodging + M&IE.
Important limits
This tool estimates maximum per diem from the rates you enter. Actual reimbursement can be lower because of provided meals, agency policy, lodging taxes, actual-expense authorization, trip circumstances, or other Federal Travel Regulation rules.
This calculator covers CONUS-style lodging and M&IE inputs and does not automatically retrieve locality rates. Alaska, Hawaii, U.S. territories, and foreign travel use other rate authorities.
Primary sources
- U.S. General Services Administration — Per Diem Rates
- GSA — M&IE breakdowns and first/last travel day amounts
- GSA Per Diem Bulletin FTR 27-01 — FY 2027 rates
- GSA Open Technology — Per Diem API documentation
Methodology & verification
- Coverage
- Overnight CONUS estimate using user-entered GSA rates.
- Standard lodging
- $110 in FY 2026; $113 in FY 2027.
- M&IE tiers
- $68, $74, $80, $86 and $92.
- Last reviewed
- 2026-09-16