San Mateo / Foster City / Belmont per diem ratesCalifornia · FY 2027
San Mateo / Foster City / Belmont’s full-year average is 10% lower than in FY 2021; only 21 areas have fallen over that span. In FY 2021 one cap covered the whole year; GSA now splits it into 3 periods.
San Mateo / Foster City / Belmont since FY 2021
Against FY 2026, San Mateo / Foster City / Belmont’s full-year average rose 9.1%, between Charlotte (NC) and Boca Raton / Delray Beach / Jupiter (FL) among year-on-year changes. In FY 2021 San Mateo / Foster City / Belmont ranked 11th of 293 by full-year average, between Nantucket (MA) and Washington, DC (DC). Along the way: flat in FY 2023, flat in FY 2024, down 17.6% in FY 2025.
| Months | Cap | Nights |
|---|---|---|
| October to November | $217 | 61 |
| December to August | $194 | 274 |
| September | $217 | 30 |
Four days in October
Monday, October 5, 2026, to Thursday: up to $952, three nights at the October cap plus $301 M&IE. Starting December 7 instead, in a low month, the same trip comes to $883.
Weighted by days, the cap sits 76.8% above the standard rate over the year.
San Mateo / Foster City / Belmont among the 295
San Mateo / Foster City / Belmont’s full-year average lodging cap, $200 a night, ranks ninth of the 32 California areas, between South Lake Tahoe ($214) and Los Angeles ($199). San Mateo / Foster City / Belmont’s Oct–Nov, Sep peak lodging cap of $217 ranks 64th among the peak caps of the 295 areas, between Sunnyvale / Palo Alto / San Jose (CA) and Toms River (NJ). Nationally, San Mateo / Foster City / Belmont is 34th of 295 on that measure, between Boca Raton / Delray Beach / Jupiter (FL, $200) and Los Angeles (CA, $199). California, area by area.