San Mateo County property tax
6 days left Until this due date
Verified — Last verified . View source
Last day to pay without a penalty: .
Read the county’s exact wording
Set by law. Check the county’s payment time and method. Updated daily.
§§ 2617 and 2704 Rev. & Tax. Code December 10 Property owners First installment of taxes on the secured roll, if unpaid, is delinquent at 5:00 p.m. or close of business day, whichever is later.
Not tax or legal advice; confirm with your county. Dates are shown as published by the source.
Installment timeline
2026–2027Due dates and filing windows, in one view.
Sources. Checked .
Today:
Assessment notice: not yet verified.
How to pay
Sources. Checked .
Late payments and penalties
Sources. Checked .
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.
Officially published
A numerical example is unavailable without a verified single percentage and unit. Use the published rule or ask the county for a payoff amount.
Assessment appeals
Sources. Checked .
Exemptions
Sources. Checked .
Homeowners' Exemption
Who may qualify
Officially published
Savings
Officially published
Disabled Veterans' Exemption
Who may qualify
Qualifying veterans rated or compensated at 100% for service-connected disability, or qualifying unmarried surviving spouses; principal residence required.
Officially published
County offices
Sources. Checked .
Common questions
Sources. Checked .
When is property tax due in San Mateo County?
First secured installment: November 1, 2026 (Set by law). Second secured installment: February 1, 2027 (Set by law).
Where can I pay San Mateo County property tax?
Use the official payment portal: https://www.smcgov.org/tax. Electronic check, Credit card
Sources
Sources. Checked .
Read the source quotations (23)
https://www.smcgov.org/ceo/news/county-controller-publishes-property-tax-highlights-fy-2024-25
More recently, they grew by 4.9 percent for FY 2025-26, and by 4.3 percent for FY 2026-27 based on assessed values as of the lien date of January 1, 2026.
Checked .
https://www.boe.ca.gov/proptaxes/calendar.htm
§ 2605 Rev. & Tax. Code November 1 Property owners First installment of real property taxes and all taxes on personal property on the secured roll are due and payable.
Checked .
https://www.boe.ca.gov/proptaxes/calendar.htm
§§ 2617 and 2704 Rev. & Tax. Code December 10 Property owners First installment of taxes on the secured roll, if unpaid, is delinquent at 5:00 p.m. or close of business day, whichever is later.
Checked .
https://www.boe.ca.gov/proptaxes/calendar.htm
If the specified date falls on Saturday, Sunday, or a legal holiday, the action may be done on the next business day. (Government Code §§ 6706, 6707)
Checked .
https://www.boe.ca.gov/proptaxes/calendar.htm
§ 2606 Rev. & Tax. Code February 1 Property owners Second installment real property taxes due and payable.
Checked .
https://www.boe.ca.gov/proptaxes/calendar.htm
§§ 2617 and 2704 Rev. & Tax. Code December 10 Property owners First installment of taxes on the secured roll, if unpaid, is delinquent at 5:00 p.m. or close of business day, whichever is later.
Checked .
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).
Checked .
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.
Checked .
https://www.smcgov.org/tax
A 10% penalty is added the next day A 10% penalty plus $40.00 cost is added the next day A redemption fee of $35.00 and a monthly penalty of 1.5% will be added to Secured defaulted parcels If a delinquent date falls on a weekend or holiday, the delinquent date is the next business day.
Checked .
https://smcacre.gov/assessor/location/assessor-division
555 County Center 3rd Floor Redwood City, CA 94063-1665
Checked .
https://smcacre.gov/assessor/property-tax-relief
The AAB’s filing deadline schedule for 2026 assessment appeals for regular assessment is from July 2, 2026 through November 30, 2026.
Checked .
https://www.smcgov.org/ceo/preparing-your-appeals-application
San Mateo County Assessment Appeals Board 500 County Center, 5th Floor, BOS 104 Redwood City, CA 94063
Checked .
https://www.boe.ca.gov/proptaxes/homeowners_exemption.htm
The California Constitution provides a $7,000 reduction in the taxable value for a qualifying owner-occupied home. The home must have been the principal place of residence of the owner on the lien date, January 1st.
Checked .
https://www.boe.ca.gov/proptaxes/homeowners_exemption.htm
To claim the exemption, the homeowner must make a one-time filing with the county assessor where the property is located. A person filing for the first time on a property may file anytime after the property or claimant becomes eligible, but no later than February 15 to receive the full exemption for that year.
Checked .
https://www.boe.ca.gov/proptaxes/dv_exemption.htm
The Disabled Veterans' Exemption reduces the property tax liability on the principal place of residence of qualified veterans who, due to a service-connected injury or disease, have been rated 100% disabled or are being compensated at the 100% rate due to unemployability. An unmarried surviving spouse of a qualified veteran may also claim the exemption.
Checked .
https://www.boe.ca.gov/proptaxes/dv_exemption.htm
the claim form must be filed between the date of the eligibility event and on or before the following January 1, or 90 days after the date of the eligibility event, whichever is later. The claim form must be filed annually between January 1 and on or before February 15.
Checked .
How we verified this page
Official sources, verification dates and corrections
Property tax in San Mateo County: county, state and US
Compare Census estimates and read the sampling notes
Sources. Checked .
Census ACS 2020–2024 estimates for owner-occupied homes. The median annual tax paid is a historical survey estimate, not a quote for this year’s bill.
| Area | Median annual tax paid | Median home value | Effective rate estimate |
|---|---|---|---|
| San Mateo County | $9,519 | $1,559,600 | 0.61% |
| California | $5,124 | $734,700 | 0.70% |
| United States | $3,119 | $332,700 | 0.94% |
San Mateo County’s effective-rate point estimate is 0.09 percentage points below California’s and 0.33 percentage points below the US estimate.
Effective rate = median annual real estate taxes paid (B25103) ÷ median owner-occupied home value (B25077). State and US figures use their own Census medians, not averages of counties. These ratios are not rates set by law or medians of individual tax rates. Differences are not tests of statistical significance. Bounded or missing estimates stay unavailable.
Census sources, quotations and sampling uncertainty
San Mateo County
Annual taxes: $9,519 (90% margin of error: ±$153). Census table B25103_001E.
0500000US06081|9519|153|10001|-333333333|6502|199
Home value: $1,559,600 (90% margin of error: ±$16,159). Census table B25077_001E.
0500000US06081|1559600|16159
Estimated effective rate: 0.61%. Census source.
0500000US06081|9519|153|10001|-333333333|6502|199
California
Annual taxes: $5,124 (90% margin of error: ±$17). Census table B25103_001E.
0400000US06|5124|17|5839|17|3825|19
Home value: $734,700 (90% margin of error: ±$1,307). Census table B25077_001E.
0400000US06|734700|1307
Estimated effective rate: 0.70%. Census source.
0400000US06|5124|17|5839|17|3825|19
United States
Annual taxes: $3,119 (90% margin of error: ±$4). Census table B25103_001E.
0100000US|3119|4|3489|4|2576|4
Home value: $332,700 (90% margin of error: ±$236). Census table B25077_001E.
0100000US|332700|236
Estimated effective rate: 0.94%. Census source.
0100000US|3119|4|3489|4|2576|4
Guides and related dates
San Mateo County property tax calculator
Estimate your bill, check exemptions and compare counties
Tools: San Mateo County, CA
Property tax calculator
Estimated annual property tax $9,519
$1,559,600 home value × 0.61% Census effective rate ≈ $9,519 per year. Uses the unrounded ratio; your actual bill may differ.
Estimate only. Not tax, legal or financial advice; confirm with your county.
Starts at the Census median for San Mateo County, CA.
Math and official Census sources
$9,519 median annual tax ÷ $1,559,600 median home value = 0.61%. Census ACS 2020–2024; a historical survey ratio, not a parcel tax rate.
0500000US06081|1559600|16159
Census source. Last verified 2026-10-24.
0500000US06081|9519|153|10001|-333333333|6502|199
Census source. Last verified 2026-10-24.
Full San Mateo County, CA calculator: exemptions, rates, dates and reminders
Prorated property tax calculator
Nearby counties and other due dates
Nearby counties
Related counties in the same Census area: San Francisco-Oakland-Fremont, CA (Metropolitan Statistical Area).
Why these counties are listed
Census delineation, verified October 24, 2026.
41860 | San Francisco-Oakland-Fremont, CA | Metropolitan Statistical Area | San Mateo County | California | 06 | 081
Other counties in California due soon
Published payment dates in the next 60 days.
- Alameda County Due date:
- Amador County Due date:
- Butte County Due date:
- Calaveras County Due date:
Date sources and verification
Alameda County
Set by law. Verified October 24, 2026. Official date source
§ 2605 Rev. & Tax. Code … November 1 … Property owners … First installment of real property taxes and all taxes on personal property on the secured roll are due and payable.
Amador County
Set by law. Verified October 25, 2026. Official date source
§ 2605 Rev. & Tax. Code | November 1 | Property owners | First installment of real property taxes and all taxes on personal property on the secured roll are due and payable.
Butte County
Set by law. Verified October 24, 2026. Official date source
§ 2605 Rev. & Tax. Code November 1 Property owners First installment of real property taxes and all taxes on personal property on the secured roll are due and payable.
Calaveras County
Set by law. Verified October 25, 2026. Official date source
§ 2605 Rev. & Tax. Code | November 1 | Property owners | First installment of real property taxes and all taxes on personal property on the secured roll are due and payable.
Updated , from cited verification dates. Individual sources may have earlier checks.