View your current San Mateo county property tax statements (secured & unsecured) and pay them online using this service. 


What is the penalty for late payment of Unsecured Property taxes?

If your Unsecured property tax payment is not received or postmarked by the delinquent date, a 10% penalty and a $35.00 collection fee are added to your bill.

If your bill remains unpaid for two additional months, a monthly penalty of 1 and 1/2% begins to accrue. In addition, if a Certificate of Tax Lien is recorded by the County of San Mateo Tax collector, an additional fee of $13.00 will be required to release the lien. 

When are secured property taxes due in San Mateo County?

San Mateo County secured property tax bill is payable in two installments:

  • The 1st installment is due and payable on November 1. However, you have until 5:00 p.m. of December 10th to make your payment before a 10% penalty is added to your bill.
  • The 2nd installment is due and payable on February 1. The grace period on the 2nd installment expires at 5:00 p.m., on April 10. If the installment remains unpaid as of April 10, a 10% penalty and $40.00 cost is imposed.

What period of time does a property tax bill cover?

Secured tax bills and Unsecured tax bills from the San Mateo County (CA) covers a "fiscal year." The fiscal year begins July 1 and ends on June 30 of the following calendar year.