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Address Inquiries

The San Mateo County Assessor is responsible for maintaining all San Mateo County Secured property situs (location) and billing addresses. If you have a question concerning the situs or billing address for a Secured property parcel, please contact the San Mateo County Assessor's Office at: 650-363-4500.

Values Inquiries

The San Mateo County Assessor is responsible for all San Mateo County Secured property tax valuations. If you have questions about the assessed value of your Secured property or would like to appeal the valuation on your property, please contact the San Mateo County Assessorís Office at: 650-363-4500.

Exemptions Inquiries

The San Mateo County Assessor is responsible for adding homeownerís and other Secured property tax exemptions to the tax roll. If you have questions about Secured property tax exemptions or would like to request an exemption on your property, please contact the San Mateo County Assessorís Office at: 650-363-4500.

Special Charges Inquiries

Questions regarding special charges on your Secured tax bill should be directed to the Agency that levied the charge. The contact numbers for the Agency responsible for each special charge on your tax bill is available with the special charge detail on the Tax Collectorís Secured Property Tax System.

Tax Rate Inquiries

The San Mateo County Controller is responsible for the calculation of composite tax rates for all tax-rate-areas. If you have questions about your Secured property tax rate, please contact the San Mateo County Controllerís Office at: 650-363-4777.

Unsecured Assessed Owner Inquiries

The San Mateo County Assessor is responsible for maintaining all San Mateo County Unsecured property owner's names and billing addresses. If you have a question concerning the owner name or billing address for Unsecured property, please contact the San Mateo County Assessor's Office at: 650-363-4501.

Unsecured Assessment Inquiries

The San Mateo County Assessor is responsible for all San Mateo County Unsecured property assessments. If you have questions about the assessed value of your Unsecured property or would like to appeal the assessment of your property, please contact the San Mateo County Assessor's Office at: 650-363-4501.

Unsecured Delinquency Inquiries

A penalty of 10.0% of the unpaid tax amount and a $35.00 collection fee is included in the tax bill AFTER 5:00 PM on the stated delinquency date.
Additional penalties are added, two months after the 10.0% penalty is attached, at the rate of 1.5% per month. If you have questions about your delinquent tax bill, please contact the San Mateo County Tax Collector's Office at: 650-363-4169.
*For Boats
A hold may be placed on your boat registration by California DMV if this tax bill is not paid by the due date.

Lien Date Inquiries

Ownership on the lien date of January 1 determines the obligation to pay taxes. Disposing of the property or moving from the county after January 1 does not relieve the assessee of the tax liability for the entire fiscal year of July 1 through June 30. If you have questions about your tax obligation, please contact the San Mateo County Tax Collector's Office at 650-363-4142.

Installment Payment Plans

If you do not want to make the entire payment required to redeem your property, you may be eligible to set up a Redemption Payment Installment Plan for prior years taxes. If you would like to discuss the possibility of setting up a payment plan, contact our Redemption Department at (650) 363-4040

The following rules apply to Redemption Payment Installment Plans:

INSTALLMENT PAYMENT PLAN

  • A minimum of 20% of the total amount of delinquency, including penalties, must be paid at the time the plan is initiated.
  • Current Taxes must be paid in full at the time the plan is initiated. While the Payment Plan is in effect, Current Taxes must be paid in full prior to April 10 each year.
  • Once a year, in the month the plan was initiated, an installment payment of 20%, plus interest on the unpaid balance must be paid.

EXCEPTION:   Persons opening plans in April, May and June are required to make an installment payment on the plan, PLUS INTEREST, by the following APRIL 10 each year.

Interest at the rate of 1 Ĺ % per month (18%APR) will be added to the unpaid balance: therefore, your next payments will differ from the payment made when the plan was initiated.

THE BALANCE SHOWN ON YOUR RECEIPT DOES NOT INCLUDE INTEREST

NOTICE
Please remember to make all payments on time.
Failure to meet the above requirements will cause the plan to default.
This will result in a re-calculation of the penalties and cause a substantial increase in the balance due for your unpaid taxes.

Payment Instructions

Redemption payments for tax defaulted property must be paid in full, including all fees, costs and interest if applicable.

If you are unable to pay the full payment amount required to redeem your property, you may contact our Redemption Office at (650) 363-4040 to discuss your eligibility to establish a payment plan.

Delayed Processing

Paying By Mail
Secured Tax

First installment payments postmarked by 12/10 are considered timely.
Second installment payments postmarked by 4/10 are considered timely.

Depending on your mailing location, it may take up to 10 days to receive and process your payments.

Paying By Credit Card
Secured Tax

Credit card payments for first installment taxes must be paid by 12/10 at 11:59PM.
Credit card payments for second installment taxes must be paid by 4/10 at 11:59PM.

All credit card payments are made through the San Mateo County Tax Collectorís web site and Official Payments Corporation secure payment processing web site.

Please allow up to four days for your credit card payment to be posted and reflected on your tax bill.

Electronic Check

Electronic check or ECheck, provides authorization for the Tax Collector to deduct a tax payment directly from the taxpayerís checking account. When the taxpayer selects the Web payment option to pay taxes by ECheck, a Web form must be completed. The taxpayer must provide contact information, bank routing, transit and account numbers. The completed ECheck form is then processed and a debit transaction is sent to the banking systemís Automated Clearing House. When all transaction information has been validated, the amount of the taxpayerís ECheck is deducted from the taxpayerís account, just like a paper check. Like a paper check, if the ECheck is returned by your bank for any reason, a "returned check" fee will be charged. Once the taxpayerís payment is cleared, the payment is automatically deposited to the San Mateo County tax account and posted to the taxpayerís tax bill(s).

Electronic checks provide a fast and convenient way to pay property tax obligations.

Note:
Bank of America puts account numbers in a different location on their checks.

Paying By ECheck Name Verification

  • If your business name is registered under your name - Enter your last name for ECheck verification.
  • If your business name is a corporation - Enter the first word in the business name
  • If your business is a DBA (Doing Business As) - Enter your last name for verification.

Service Fees

The County of San Mateo does not impose nor does it collect the service fee charged to use your credit card. The credit card companies collect 85% of the fee. Our web payment partner, Official Payments, Corp. receives the remaining 15% for providing this credit card service.

You should know that every time you use your credit card, the credit card company charges a fee to the merchant who accepts your card for payment. This usually amounts to about 2.35% of your purchase price. The merchant passes on this fee to you in the price he charges for goods or services. This is true whether you pay over the Internet or over the counter. By law, the County cannot absorb any part of this fee. We must therefore pass the fee on to the consumer.

ECheck

ECheck is a method of payment that allows you to create an electronic version of your check on line using the routing/transit and account numbers found at the bottom of your check (DO NOT include the sequential Check Number). Once you have entered your checking account information, the transaction created then becomes an Electronic Funds Transfer (EFT) that is processed through the Automated Clearing House (ACH) network. For your protection, all account numbers are encrypted and transmitted securely. There is no charge for an ECheck payment.
Not all accounts are appropriate for electronic payments. You cannot pay with ECheck using a savings account. Certain accounts such as home equity line of credit or brokerage accounts may not be acceptable to the Automated Clearing House (ACH) network. If you plan to use an account other than a standard bank checking account, please check with your financial institution before submitting payment. An $85.00 fee will be charged for all E-Checks that are rejected by the bank. Click here for some examples of checks that are not accepted

Examples of Checks Not Accepted for ECheck
Transactions

Equity Line Checks
Credit Card Checks
Money Market Checks
Corporate Checks
3rd Party Checks
Cashierís Checks
Money Orders
Travelerís Checks
US Treasury Checks
Brokerage Account Checks
Savings Accounts

Credit Cards

You can pay your taxes using your credit card through our web site or by calling 1-800-269-5971. We accept Visa, MasterCard, Discover and American Express. Payments made using a bank debit/credit or "check" card will be processed as credit card payment. Debit cards are not accepted. All credit card payments are processed through our payment service, Official Payments Corporation. There is a 2.35% service fee for payments over $168.00 and a flat fee of $3.95 for payments $168.00 or less on all credit card transactions. This fee is processed as a separate transaction and will appear as a separate transaction on your monthly statement. The County of San Mateo does not impose the service fee charged to use your credit card. The credit card companies impose the largest portion of the fee (85%). Our web payment partner - Official Payments, Corp. imposes the remaining portion (15%), which is how they are compensated for providing this service. You should know that every time you use your credit card, the credit card company charges a fee to the merchant who accepts your card for payment. This usually amounts to about 2.35% of your purchase price. The merchant passes on this fee to you in the price he charges for goods or services. By law, the County cannot absorb any part of this fee. We must therefore pass the fee on to the customer.

Address Search

Enter your street number, street name and city. The street suffix (e.g. ĎStí, ĎAveí,) is not required. Select your parcel from the list displayed.


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