GSA trip allowance tool
GSA per diem trip calculator
Estimate lodging plus M&IE for a business trip using an official GSA locality import. Enter an exact GSA destination and state from the list, or choose standard CONUS manually.
Methodology
- Uses a build-time import of the full FY2026 GSA per diem workbook.
- Matches only exact GSA destination + state names from the imported list.
- Uses the selected travel month to choose the correct lodging season.
- Applies 75% of the M&IE rate on the first and last travel day.
- Standard CONUS is only used when the user selects it manually.
Source and trust notes
- Source baseline: official GSA FY2026 per diem workbook.
- Coverage: full imported FY2026 CONUS destination list, with exact destination lookup only.
- ZIP lookup and non-CONUS locality lookup are not supported in this calculator.
- This page combines official rate inputs with a site-generated trip estimate.
- Unmatched destinations do not receive an automatic locality estimate.