San Mateo / Foster City / Belmont rate history — Max per diem ($/day). Query any past effective date directly via the API.
| Period | Lodging | M&IE | Max per diem |
|---|---|---|---|
| FY2026 | $183 | $86 | $269 |
| FY2025 | $183 | $86 | $269 |
| FY2024 | $222 | $74 | $296 |
| FY2023 | $222 | $74 | $296 |
| FY2022 | $222 | $74 | $296 |
| FY2021 | $222 | $66 | $288 |
| FY2020 | $231 | $66 | $297 |
| FY2019 | $211 | $66 | $277 |
| FY2018 | $213 | $69 | $282 |
| FY2016 | $184 | $69 | $253 |
| FY2015 | $155 | $61 | $216 |
| FY2014 | $140 | $61 | $201 |
This GSA per diem rate sets the maximum reimbursable lodging and meals & incidental expenses (M&IE) for federal employees and government contractors on temporary duty (TDY) travel to San Mateo / Foster City / Belmont, California. Travel and expense systems use it as the ceiling for voucher reimbursement; contractors use it for DCAA-compliant travel cost modeling on proposals and invoices.
The exact request that returns this page's data. Change the
date parameter to query any historical effective
date, or pull it straight into your ERP, payroll, or expense system.
curl -H "X-API-Key: YOUR_KEY" \ "https://api.allowancesapi.com/v1/gsa/perdiem/state/US-CA?city=San%20Mateo%20/%20Foster%20City%20/%20Belmont"{
"effective_date": "2026-07-01",
"results": [
{
"destination": "San Mateo / Foster City / Belmont",
"lodging": 183,
"meals_incidental": 86,
"season_begin": "10/01",
"season_end": "09/30",
"state": "US-CA"
}
],
"verification_url": "https://www.gsa.gov/travel/plan-book/per-diem-rates"
}Allowances API is not affiliated with, endorsed by, or sponsored by any U.S. Government agency. All rate data is sourced from official public rate tables and re-published in a normalized format.