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November 1, 2020 - December 10, 2020
All Day
County Finance Building: Treasurer-Tax Collector's Office
625 Court Street, Room 100
Martinez, CA 94553
(925) 957-5280
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Secured Property Tax 1st Installment Due

Sunday, November 1, 2020

The first installment of your Secured Property Taxes are due November 1 and are delinquent after 5:00 p.m. on December 10. A 10% penalty is added after December 10. If December 10 falls on a weekend or holiday, taxes are not delinquent until 5 p.m. the next business day.

1st Installment of Secured Property Taxes is due November 1

Only U.S. Post Office cancellation mark is used as the date for receipts for mail-in payments.  Metered dates will not be honored.  Any mail-in payments post-marked later than December 10 will be counted late and a 10% penalty will apply.

Card and e-check payments can be made on line 24/7 at or by phone at (925) 957-5280 up until 11:59PM December 10. After this time, the 10% penalty will apply.
Please note: A convenience fee is assessed for card payments.  This fee is charged and collected by a 3rd-party vendor for the service of processing your card payment.  The Tax Collector receives no proceeds from the fee.