San Mateo / Foster City / Belmont Per Diem Rate (FY2026)
San Mateo · California · Official U.S. GSA federal per diem
For fiscal year 2026, the GSA per diem rate for San Mateo / Foster City / Belmont is $86/day for meals & incidental expenses (M&IE) and $183/night for lodging, compared with the standard $178/day CONUS rate ($110 lodging + $68 M&IE).
A 4-night business trip to San Mateo / Foster City / Belmont in January totals $1,119: $732 lodging (4 nights) + $387 M&IE (5 days, first & last day at 75%).
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San Mateo / Foster City / Belmont lodging rate by month (FY2026)
Nightly lodging caps for San Mateo / Foster City / Belmont. M&IE is flat at $86/day and does not change by month.
| Month | Lodging / night | Season |
|---|---|---|
| Jan | $183 | · |
| Feb | $183 | · |
| Mar | $183 | · |
| Apr | $183 | · |
| May | $183 | · |
| Jun | $183 | · |
| Jul | $183 | · |
| Aug | $183 | · |
| Sep | $183 | · |
| Oct | $183 | · |
| Nov | $183 | · |
| Dec | $183 | · |
How does San Mateo / Foster City / Belmont compare with other California per diem areas?
San Mateo / Foster City / Belmont ranks #14 of 32 California non-standard per diem areas by peak lodging cap, at $183/night — $2 above the state's $181/night NSA average.
The $183/night lodging cap holds flat through all 12 months of FY2026, so there is no cheaper season to target in San Mateo / Foster City / Belmont — trip cost depends only on length of stay and the $86/day M&IE tier.
Flexible on location? The next cheaper California area is Santa Cruz at $176/night peak, and the next step up is Palm Springs at $186/night.
Book within the San Mateo / Foster City / Belmont lodging cap
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San Mateo / Foster City / Belmont per diem FAQ
- What is the per diem rate for San Mateo / Foster City / Belmont?
- For FY2026, the GSA per diem rate for San Mateo / Foster City / Belmont, California is $86 per day for meals and incidental expenses (M&IE) and $183/night for lodging. The standard CONUS rate, for comparison, is $178 per day ($110 lodging + $68 M&IE).
- What is the meal reimbursement (M&IE) rate in San Mateo / Foster City / Belmont?
- $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.
- What is the tax-free travel nurse stipend cap in San Mateo / Foster City / Belmont?
- Tax-free housing and meal stipends for travel nurses are capped at the GSA per diem for the assignment location. In San Mateo / Foster City / Belmont the full daily cap is up to $269 (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.