Sales tax in Contra Costa County, California
There is no single sales tax rate in Contra Costa County. It runs from 8.75% to 10.25% depending on the exact address, because cities and special districts inside the county levy their own on top of the 7.25% state rate. The 7.25% state rate applies everywhere in the county; everything above that depends on where you are standing. These rates were read from California's own published schedule and checked on October 1, 2026. The rate in each of the 19 cities is in the table below.
What is the sales tax rate in Contra Costa County?
| California state rate | 7.25% |
|---|---|
| Contra Costa County rate | 1.5% |
| Lowest combined rate in the county | 8.75% |
| Highest combined rate in the county | 10.25% |
The combined figures are the lowest and highest totals anywhere in Contra Costa County, so the rows above do not add up to them.
What is the sales tax rate in each city in Contra Costa County?
California publishes the rate for every city it taxes. These are the combined rates, state and local together, as listed in California's own rate file.
| City | October 1, 2026 onward |
|---|---|
| Antioch | 9.75% |
| Brentwood | 8.75% |
| Clayton | 8.75% |
| Concord | 9.75% |
| Danville | 8.75% |
| El Cerrito | 10.25% |
| Hercules | 9.25% |
| Lafayette | 9.25% |
| Martinez | 9.75% |
| Moraga | 9.75% |
| Oakley | 8.75% |
| Orinda | 9.75% |
| Pinole | 10.25% |
| Pittsburg | 9.25% |
| Pleasant Hill | 9.25% |
| Richmond | 9.75% |
| San Pablo | 9.5% |
| San Ramon | 9.75% |
| Walnut Creek | 9.25% |
| Unincorporated Contra Costa County | 8.75% |
Source: California rate file for October 1, 2026 onward, from California's official rate page.
How much sales tax is that on a purchase in Contra Costa County?
At 8.75%, a $100 purchase carries $8.75 in sales tax and a $1,000 purchase $87.50, at the lowest rate in the county. At the highest, 10.25%, the same purchases carry $10.25 and $102.50. That is general merchandise; California taxes some categories, often groceries, differently, as the note below explains.
Among California's 58 counties, Contra Costa County's lowest rate ranks 7th highest, level with 2 other counties. See every California county.
Sales tax in counties next to Contra Costa County
Contra Costa County borders 7 counties. The lowest rate next door is 7.375% in Solano County, CA, which is $13.75 less on a $1,000 purchase than the lowest rate in Contra Costa County.
| County | Combined sales tax |
|---|---|
| Alameda County, CA | 10.25% to 10.75% |
| Sonoma County, CA | 9.25% to 10.5% |
| Contra Costa County, CA (this county) | 8.75% to 10.25% |
| San Francisco County, CA | 8.625% |
| Marin County, CA | 8.25% to 9.25% |
| Sacramento County, CA | 7.75% to 9.25% |
| San Joaquin County, CA | 7.75% to 9% |
| Solano County, CA | 7.375% to 9.625% |
Why the rate here is not the whole story
California levies 7.25% statewide and Contra Costa County adds a countywide district tax of 1.50%, bringing the countywide rate to 8.75%. Cities and special districts inside the county add more on top, so the combined rate runs from 8.75% to 10.25% depending on the address. District taxes are approved by voters in individual cities and districts and do not follow county lines, so use the CDTFA address lookup for a specific location.
How do I find the exact rate for an address in Contra Costa County?
Use California's own address lookup. In Contra Costa County the rate depends on the address, anywhere from 8.75% to 10.25%.
Who has to collect sales tax in Contra Costa County?
Any seller with a physical presence in California collects at the rate for the address of the sale; a remote seller does once it passes California's economic nexus threshold. California sales tax covers the statewide rules and what is exempt.
Work out your own numbers
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Sales tax calculator
Tax on a specific purchase at this county's rate, and the total you will actually pay.
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Do you have to collect?
Whether your sales into California cross its economic nexus threshold. A different question from the rate.
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Property tax in Contra Costa County
The other local tax: effective rate and median bill for this county.
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Sales tax by county
Every US county, and how California compares with the rest of the country.
Sources
- Contra Costa County rates: California Department of Tax and Fee Administration, CDTFA-95 California Sales and Use Tax Rates by County and City, REV. 39 (10-26), operative October 1, 2026, cross-checked against CDTFA's downloadable rate file Tax Rates Effective October 1, 2026 (SalesTaxRates10-1-26.xlsx)
- Collected and verified October 1, 2026. Confidence: P on the rate components, P on the range (P read on a primary agency page, S strong but indirect, U unverified).