SAN MATEO Sales Tax Overview
As of 2026, SAN MATEO, California has an average combined sales tax rate of 9.563%, with rates varying across 4 zip codes from 9.375% to 9.625%. This rate includes the California state tax of 6% plus applicable county and local taxes.
Different areas within SAN MATEO may have different rates due to special tax districts, transit authority taxes, or other local levies. It is important to use your exact zip code when calculating taxes for purchases, business filings, or compliance purposes.
SAN MATEO Tax Examples
* Based on average rate of 9.563%. Verify with your exact zip code.
SAN MATEO Zip Codes & Tax Rates
Frequently Asked Questions
What is the sales tax rate in SAN MATEO, CA?
The average sales tax rate in SAN MATEO, CA is 9.563% as of 2026. This includes the 6% California state tax plus any county and city taxes.
How many zip codes are in SAN MATEO, CA?
SAN MATEO, CA has 4 zip codes in our database: 94402, 94404, 94497, 94026.
How much is sales tax on a $100 purchase in SAN MATEO?
On a $100 purchase in SAN MATEO, CA you would pay approximately $9.56 in sales tax at the average rate of 9.563%, for a total of $109.56.
Is SAN MATEO's sales tax rate higher than the California average?
Use our calculator to compare SAN MATEO's rate of 9.563% against other cities in California. Visit the California state page for the statewide average.