Useful Tools

CONUS Per Diem Calculator

Written by Amanda Canupp Mendoza | Aug 12, 2025 5:37:25 PM

GSA CONUS Per Diem Calculator

Segment 1

How to use this calculator

Directions: Pick from a single or multi-day trip. Add up to two segments (state + city/county + dates). We calculate per-day lodging caps and M&IE, apply the GSA 75% rule on segment first/last days, split M&IE into Meals and Incidentals ($5/day), and total everything, adjusting for seasonal rates automatically.
  1. Trip Type: Single day (one date) or Multi-day (start & end). Optionally add a second segment.
  2. Destination: Choose State → type to search City/County → select a match. No city? We’ll fall back to that state’s Standard rate.
  3. Dates: For each segment, pick the date(s). We apply the correct rate per day, including first/last day 75%.
  4. Calculate: Review the per-day table and totals. Click Use "Export to CSV" to save/share.

What the columns mean

  • Lodging cap: Max reimbursable lodging for that night (no lodging on the last day of a segment).
  • M&IE (full): Full Meals & Incidentals before the 75% rule.
  • M&IE payable: 75% on the first/last travel day of a segment; otherwise 100%.
  • Meals / Incidentals: M&IE split; Incidentals fixed at $5 (scaled to $3.75 when 75% applies).

This is general information, not tax/HR advice. Confirm your internal policy and any CBA rules.

From calculator → automated expense reporting

Automate your per diems and expense reports 

Turn compliant per diem lookups into one-click, policy-enforced expense reports with project/grant tracking, approvals, and audit-ready exports.

  • Enforces GSA rules (incl. 75% first/last day) automatically
  • Projects, grants & cost centers out-of-the-box
  • Manager & finance approvals with policy checks
  • Audit-ready exports
  • Integrates with NetSuite, Intacct, & Dynamics
Request a Demo to See it In Action
Policy engineOn
ApprovalsMulti-level
Projects / grantsBuilt-in
Time to submitMinutes
Error rate