Mammoth Lakes Per Diem Rate (FY2026)
Mono · California · Official U.S. GSA federal per diem
For fiscal year 2026, the GSA per diem rate for Mammoth Lakes is $86/day for meals & incidental expenses (M&IE) and $139–$195/night for lodging depending on the month, compared with the standard $178/day CONUS rate ($110 lodging + $68 M&IE). Lodging peaks in January and is lowest in April.
A 4-night business trip to Mammoth Lakes in January totals $1,167: $780 lodging (4 nights) + $387 M&IE (5 days, first & last day at 75%).
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Mammoth Lakes lodging rate by month (FY2026)
Nightly lodging caps for Mammoth Lakes. M&IE is flat at $86/day and does not change by month.
| Month | Lodging / night | Season |
|---|---|---|
| Jan | $195 | Peak |
| Feb | $195 | Peak |
| Mar | $195 | Peak |
| Apr | $139 | Low |
| May | $139 | Low |
| Jun | $139 | Low |
| Jul | $139 | Low |
| Aug | $139 | Low |
| Sep | $139 | Low |
| Oct | $139 | Low |
| Nov | $139 | Low |
| Dec | $195 | Peak |
How does Mammoth Lakes compare with other California per diem areas?
Mammoth Lakes ranks #10 of 32 California non-standard per diem areas by peak lodging cap, at $195/night — $14 above the state's $181/night NSA average.
Lodging in Mammoth Lakes swings 40% across the year — from $139/night in April to $195/night in January — so the same 4-night stay reimburses $224 more at the peak. M&IE stays flat at $86/day regardless of season.
Flexible on location? The next cheaper California area is Sunnyvale / Palo Alto / San Jose at $192/night peak, and the next step up is San Luis Obispo at $203/night.
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Mammoth Lakes per diem FAQ
- What is the per diem rate for Mammoth Lakes?
- For FY2026, the GSA per diem rate for Mammoth Lakes, California is $86 per day for meals and incidental expenses (M&IE) and $139–$195/night for lodging depending on the month. The standard CONUS rate, for comparison, is $178 per day ($110 lodging + $68 M&IE).
- What is the meal reimbursement (M&IE) rate in Mammoth Lakes?
- $86 per day for FY2026: $22 breakfast, $23 lunch, $36 dinner and $5 incidentals. The first and last day of travel reimburse at 75%, or $64.50.
- Why does lodging per diem in Mammoth Lakes change by month?
- GSA sets seasonal lodging caps for high-demand areas. In Mammoth Lakes, lodging is highest in January at $195/night and lowest in April at $139/night. M&IE stays flat at $86/day all year.
- What is the tax-free travel nurse stipend cap in Mammoth Lakes?
- Tax-free housing and meal stipends for travel nurses are capped at the GSA per diem for the assignment location. In Mammoth Lakes the full daily cap is up to $281 (peak-month lodging + $86 M&IE). The portion above the GSA rate is taxable wages, and the stipend is only tax-free at all if you maintain a qualifying tax home.