How to pay San Mateo County, CA property tax
✓ Verified — Last verified October 24, 2026
Payment details from the official sources for San Mateo County. Check the tax year and parcel on your bill before submitting a payment.
Pay on the official siteNot tax or legal advice; confirm with your county.
Payment methods and fees
Published installment dates
Tax year 2026. Dates retain the year published by the source.
Published late-payment rule
First installment: 10% after the payment deadline. Second installment: 10% plus $40. At tax default, $35 redemption fee plus 1.5% monthly penalty. Delinquent dates move to the next business day on weekends or holidays.
Official source. Verified .
Official offices
San Mateo County Tax Collector
Sources for these instructions
https://www.smcgov.org/tax/using-tax-payment-system
There is no charge for electronic check (e-check) payments. You may also pay online by using a credit card (Visa, MasterCard, Discover or American Express).
Verified October 24, 2026
https://www.smcgov.org/tax/using-tax-payment-system
There is no charge for electronic check (e-check) payments. You may also pay online by using a credit card (Visa, MasterCard, Discover or American Express). All credit card payments are processed through our payment service. Please be aware that there is a 2.35% service fee for payments.
Verified October 24, 2026
Continue with your property
Common questions
Where can I pay San Mateo County property tax?
Official payment portal: https://www.smcgov.org/tax. Electronic check, Credit card
Updated , from cited verification dates. Individual sources may have earlier checks.