The delinquent date for 1st Installment Secured Property Taxes is December 10. Payments received after this date will be considered late and a 10% penalty will apply. The USPS postmark will be honored for mail-in payments.
Due to the high volume of online users, the website and automated phone system may experience delays. An exterior drop box for check payments only is available at the Main Street entrance of the Finance building, 625 Court Street, Martinez, during business hours.
The Contra Costa County Tax Collector’s Office is open online www.cctax.us, by walk-ins from 8:00 AM to 5:00 PM or by phone (925) 608-9500 from 9:00 AM to 4:00 PM. To ensure public safety during COVID-19, masks are required regardless of vaccination status.
DROP OFF CHECK PAYMENTS: The Treasurer-Tax Collector’s Office has an exterior drop box located in the door of the Main Street entrance, 625 Court Street, Martinez, CA. The drop box is available Monday to Friday, 8:00 AM to 4:30 PM for CHECK payments only. NO CASH ALLOWED. The drop box is emptied frequently during the day.
To save time and avoid long lines, taxpayers should either mail in their payment or go online to pay their taxes.
To mail in payment, please use the return window envelopes provided with the tax bill. Include the installment coupon(s) with the payment. Please note, we honor only the USPS cancellation postmark as the receipt date.
To pay online, go to www.cctax.us and select Pay Online. Search the tax account by either the property’s APN (Assessor’s Parcel Number) or by its situs address, then verify that the resulting address found is correct. Select to pay immediately or schedule a payment for a later date. Payment can be made either by credit or debit card or by electronic check (e-check). A fee will be assessed for card transactions by the third-party payment processor. There is no fee for e-check transactions. Upon completion of the payment, an email confirmation will be sent.
To pay by phone, dial (925) 608-9500 and follow the prompts. Have the Secured tax bill on hand for APN information as well as the credit or debit card or checkbook. Payment can be made either by credit or debit card or by electronic check (e-check). A fee will be assessed on card transactions by the third-party payment processor. There is no fee for e-check transactions. Upon completion of the payment, a confirmation number will be given.
CALL CENTER HOURS
To speak to a representative of the Tax Collector’s Office, please dial (925) 608-9500 and follow the prompts. Calls are taken between 9:00 AM and 4:00 PM, Monday through Friday, except holidays. We anticipate a higher volume of calls this year due to the pandemic. We appreciate your patience while waiting for your call to be answered.