Montana per diem rates (FY2026)
Montana has 4 cities with their own GSA rate. Everywhere else in the state uses the standard rate.
| City / county | Lodging | M&IE |
|---|---|---|
| Big Sky / West Yellowstone/Gardiner · Gallatin/Park | $176.00–$310.00 | $80.00 |
| Helena · Lewis and Clark | $132.00 | $74.00 |
| Kalispell/Whitefish · Flathead | $124.00–$232.00 | $80.00 |
| Missoula · Missoula | $130.00–$195.00 | $74.00 |
About Montana per diem
GSA has surveyed and listed a non-standard rate for 4 locations in Montana, topping out at $310.00 a night in Big Sky / West Yellowstone/Gardiner. Every other city or county in the state defaults to the standard CONUS rate of $110.00 lodging and $68.00 M&IE.
On the first and last day of any trip, M&IE is paid at 75% under the first/last-day rule — $51.00 at the standard rate, or the equivalent 75% figure for whichever listed city you're travelling to. See how to calculate per diem for a business trip for the full worked example.
Frequently asked questions
Does every city in Montana have its own per diem rate?
No — only 4 locations have a separately listed GSA rate in Montana. Every other city or county in the state uses the standard CONUS rate of $110.00 lodging + $68.00 M&IE.
Which city in Montana has the highest per diem rate?
Big Sky / West Yellowstone/Gardiner has the highest listed lodging cap in Montana, at $310.00 a night, compared with $132.00 in Helena.
How do I calculate per diem for a multi-city trip through Montana?
Use the calculator on each city's page for the nights spent there, then add the totals together — lodging caps and M&IE tiers can differ from one Montana city to the next, so a single flat rate for the whole trip would be inaccurate.
Calculate a trip → PerDiemWise is an independent tool, not affiliated with the GSA.