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 August 31 will be counted late and a 10% penalty plus a $30 cost will apply.
Card and e-check payments can be made on line 24/7 at www.cctax.us or by phone at (925) 957-5280 up until 11:59PM August 31. After this time, the 10% penalty and $30 cost 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