How do I calculate a Castro Valley 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.

Castro Valley per diem rates

Q: What is the GSA per diem rate for Castro Valley?

GSA does not list Castro Valley as its own key city. ZIP 94546 maps to Oakland: $92 M&IE and peak lodging $145.

Alameda County · ZIP 94546 · FY 2026

Official travel to Castro Valley in Alameda County (sample ZIP 94546) is not its own GSA key city. GSA maps this ZIP to the Oakland high-cost locality : $92 M&IE and peak lodging $145.

First and last travel days use 75% of M&IE ($69). Lodging is a monthly maximum (before tax). Statewide default CONUS is $110 lodging + $68 M&IE when no higher locality applies.

Assigned M&IE: $92
Peak lodging: $145

Calculate Castro Valley per diem Oakland monthly table

Example: 3-night trip in Castro Valley

Four travel days at the assigned Oakland caps: two at 75% M&IE and two at 100%, plus three nights at peak lodging $145.

Lodging: 3 × $145 = $435
M&IE: 2 × $69 + 2 × $92 = $322
Estimated total: $757

Frequently asked questions

What is the GSA per diem rate for Castro Valley?

GSA does not publish a separate key-city rate named Castro Valley. ZIP 94546 maps to Oakland: $92 M&IE and peak lodging $145.

How do I calculate a trip to Castro Valley?

Open the GSA calculator with this locality selected, or enter ZIP 94546. First and last days are 75% of M&IE.

Other cities in Alameda County

Nearby California high-cost localities

Planning aid only · ZIP maps to a GSA destination ID · Methodology