South San Francisco per diem rates
San Mateo County · ZIP 94080 · FY 2026
Official travel to South San Francisco in San Mateo County (sample ZIP 94080) is not its own GSA key city. GSA maps this ZIP to the San Mateo high-cost locality : $86 M&IE and peak lodging $183.
First and last travel days use 75% of M&IE ($64.5). Lodging is a monthly maximum (before tax). Statewide default CONUS is $110 lodging + $68 M&IE when no higher locality applies.
- Assigned M&IE
- $86
- Peak lodging
- $183
Example: 3-night trip in South San Francisco
Four travel days at the assigned San Mateo caps: two at 75% M&IE and two at 100%, plus three nights at peak lodging $183.
- Lodging: 3 × $183 = $549
- M&IE: 2 × $64.5 + 2 × $86 = $301
- Estimated total: $850
Frequently asked questions
What is the GSA per diem rate for South San Francisco?
GSA does not publish a separate key-city rate named South San Francisco. ZIP 94080 maps to San Mateo: $86 M&IE and peak lodging $183.
How do I calculate a trip to South San Francisco?
Open the GSA calculator with this locality selected, or enter ZIP 94080. First and last days are 75% of M&IE.
Other cities in San Mateo County
Nearby California high-cost localities
Planning aid only · ZIP maps to a GSA destination ID · Methodology