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  1. Welcome to the Tax Portal


    We've collated all the information you need regarding Contra Costa taxes. Peruse rates information, view relief programs, make a payment, or contact one of our offices.
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  1. Tax Calendar

June 2021

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  1. Tue, Jun 1 - Sat, Jul 31

    Business License Renewal Due Business licenses renewal is due June 30 and delin...
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  2. Mon, Jul 5

    Closed Day After Independence Day
    Read More

  3. Tue, Aug 17

    Treasury Oversight Committee The Board of Supervisors established the Treasury ...
    Read More
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  1. Tax News

  1. Executive Order Extended for COVID-Related Penalty Cancellation

    The Governor of California extends Executive Order N-61-20 until June 30, 2021. Taxpayers who have not been able to pay their property taxes timely for reasons related to COVIC-19 have until June 30, 2021 to submit a request for penalty cancellation. Read more...
  2. FAQ3

    Frequently Asked Questions

    Have a question about property taxes in Contra Costa County? You are not alone. Hopefully, we have the answer you are looking for. Read more...
  3. Senior Group

    Tax Assistance for Seniors

    Depending on age and sometimes income, Seniors may qualify for certain tax assistance. Read more...
  4. Important Dates5

    Important Tax Dates

    The following schedule is intended to serve as a general guide to property owners in Contra Costa County, California. Read more...
  5. Tax time on a calculator

    Billing & Payments

    Explore options for receiving the annual tax bill and for paying your taxes, plus more. Read on...
  6. Person putting keys into the hands of another

    New Property Owners

    As a new owner you may not receive a bill since it is mailed out only once a year. If you recently bought property, you should contact our office to find out the tax status and obtain a copy of the bill. Read on...
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  1. Contact Us:   Public Information Contacts  Contact Webmaster

    Government Center:       1025 Escobar Street, Martinez, CA 94553
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