How do I calculate a Half Moon Bay trip total?

Use the GSA per diem calculator with California and this ZIP or locality selected. Lodging is per night; M&IE is 100% on full days and 75% on the first and last calendar days.

Half Moon Bay per diem rates

Q: What is the GSA per diem rate for Half Moon Bay?

GSA does not list Half Moon Bay as its own key city. ZIP 94019 maps to San Mateo: $86 M&IE and peak lodging $183.

San Mateo County · ZIP 94019 · FY 2026

Official travel to Half Moon Bay in San Mateo County (sample ZIP 94019) 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

Calculate Half Moon Bay per diem San Mateo monthly table

Example: 3-night trip in Half Moon Bay

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 Half Moon Bay?

GSA does not publish a separate key-city rate named Half Moon Bay. ZIP 94019 maps to San Mateo: $86 M&IE and peak lodging $183.

How do I calculate a trip to Half Moon Bay?

Open the GSA calculator with this locality selected, or enter ZIP 94019. 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