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Contra Costa County

Contra Costa County Treasurer-Tax Collector, Business License Tax Division

In short

Contra Costa County Treasurer-Tax Collector, Business License Tax Division issues 1 permit we publish for Contra Costa County, last verified 2026-10-02. Each carries the fee as the agency publishes it, with a link to the schedule it was read from.

What this agency issues

Permits required, with issuing agency, fee, renewal term and the date each record was last verified against its source
Business License Taxonly if it applies to youContra Costa County Treasurer-Tax Collector, Business License Tax DivisionClass A (general businesses): $100.00 flat per business entity, plus $10.00 per full-time-equivalent employee in excess of one — so a sole proprietor with no additional staff owes only the $100 base. Class B (transient, itinerant or amusement businesses): $100.00 per day, paid in advance. Businesses with annual gross receipts under $20,000, qualifying 501(c)(1)/(2)/(3) nonprofits, businesses leasing 4 or fewer residential units, and certain agricultural growers are exempt from the tax itself, subject to filing proof of the exemption annually with the Tax Collector. Transfer-of-license and lost/duplicate-license fees are each $10.00.annual; license year July 1 - June 30, renewal due by June 302026-10-02

Fees shown as a range or formula are set that way by the issuing agency — we do not average them into a single number.

About each permit

Business License Tax

This tax applies ONLY to a business located in, or operating from, the unincorporated area of Contra Costa County — the county's own page states the requirement this way, and the codified text makes it unlawful to engage in business in the unincorporated area without first procuring a license. A business inside any of the county's 19 incorporated cities (Richmond, Antioch, Concord, San Ramon, Walnut Creek, Martinez and the rest) instead follows that city's own business licensing, entirely outside the county's reach. A state-licensed contractor who conducts business in the unincorporated area, or who is based there regardless of where the work occurs, must hold this license and supply a current State Contractor's License copy with the application. Late payment carries a 25% penalty plus interest at 1.5% per month.

Contact

Jurisdiction
Contra Costa County
Phone
(925) 608-9500

Contact details are taken from the agency’s own site or its published fee schedule. Where we have not verified a phone number we leave it blank rather than guess.

Sources

Every fee and term above was read from one of these government pages on the date shown.

  1. Business License Important Notice of ComplianceContra Costa County Treasurer-Tax Collector · primary source · retrieved 2026-10-02
  2. Business License InformationContra Costa County Treasurer-Tax Collector · primary source · retrieved 2026-10-02
  3. Cities of Contra Costa — list of 19 incorporated citiesContra Costa County · primary source · retrieved 2026-10-02
  4. County Ordinance Code, Title 6, Division 64, Chapter 64-14 — Business License Tax (codified text)Contra Costa County / Municode · primary source · retrieved 2026-10-02
  5. How to Apply for a County Business LicenseContra Costa County Treasurer-Tax Collector · primary source · retrieved 2026-10-02

Other offices serving Contra Costa County

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Commercial Compliance Hub publishes information, not legal advice. Requirements change — confirm anything you rely on with the issuing agency before you file.