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Contra Costa County property tax due dates 2026

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Due in 8 days

First secured installment: (statutory)

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Not tax or legal advice; confirm with your county. Dates are shown as published by the source.

Installment timeline

  1. First secured installment

    statutory. Official source

  2. Second secured installment

    statutory. Official source

Download announced dates (.ics)

Only announced dates are included, with a reminder seven days before. Re-download after dates change.

How to pay

Payment methods

Apple Pay, Google Pay, Venmo, PayPal, Credit card, Debit card, E-check

Official source. Verified .

Fees

Cards and digital wallets: 2.50%, $3.50 minimum. E-check has no service fee.

Official source. Verified .

Late payments and penalties

Delinquent after

December 10, 2026

Official source. Statutory. Verified .

10% on the unpaid first installment; 10% plus $20 cost on the unpaid second installment.

Official source. Verified .

Published rate: 10% late-payment penalty

Assessment appeals

Regular appeals: July 2 through November 30 each year. Supplemental or escape assessments: within 60 days of notice.

Official source. Verified .

Where to file

Mail application and $40 check to Assessment Appeals Board, 1025 Escobar Street, 1st Floor, Martinez, CA 94553.

Official source. Verified .

Official appeal information

Official appeal information

Official source. Verified .

Exemptions

Disabled Veterans Exemption

Who may qualify

Veterans rated 100% disabled, blind or paraplegic due to service-connected disability, or an unmarried surviving spouse.

Official source. Verified .

Official exemption information

Official exemption information

Official source. Verified .

County offices

Common questions

When is property tax due in Contra Costa County?

First secured installment: November 1, 2026 (statutory). Second secured installment: February 1, 2027 (statutory).

Where can I pay Contra Costa County property tax?

Use the official payment portal: https://taxcolp.cccttc.us/lookup/. Apple Pay, Google Pay, Venmo, PayPal, Credit card, Debit card, E-check

What happens if my Contra Costa County payment is late?

10% on the unpaid first installment; 10% plus $20 cost on the unpaid second installment.

Sources and verification

https://ptops.contracosta.ca.gov/registration.php
Request an account · Fiscal Year 2026 - 2027

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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.

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https://www.boe.ca.gov/proptaxes/calendar.htm
§ 2606 Rev. & Tax. Code February 1 Property owners Second installment real property taxes due and payable.

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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.

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https://www.contracosta.ca.gov/FAQ/Topic?mobile=ON&topic=25
Please be aware that a 10% late-payment penalty will be assessed on the unpaid balance on the first installment. The penalty will also attach to the unpaid portion of the second installment plus a $20 cost.

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https://www.contracosta.ca.gov/10519/Taxes-In-Contra-Costa
View & Pay your Property Taxes: https://taxcolp.cccttc.us/lookup/

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https://www.contracosta.ca.gov/1756/Service-Fee
a Service Fee will be assessed depending on the type of payment selected: Apple Pay, Google Pay, Venmo, PayPal, credit card or debit card. The service fee for Apple Pay, Google Pay, Venmo, PayPal, credit and debit card based payments is 2.50% of the transaction amount with a minimum charge of $3.50. There is no Service Fee for payments made via E-check;

Verified

https://www.contracosta.ca.gov/1756/Service-Fee
The service fee for Apple Pay, Google Pay, Venmo, PayPal, credit and debit card based payments is 2.50% of the transaction amount with a minimum charge of $3.50. There is no Service Fee for payments made via E-check;

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https://www.contracosta.ca.gov/2924/Assessment-Appeals
Regular Assessment Appeals must be filed between July 2 and November 30 of each calendar year. Supplemental or Escape assessments must be filed within 60 days of the notice from the Assessor.

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https://www.contracosta.ca.gov/2924/Assessment-Appeals
Once completed, mail application and $40 check to: Assessment Appeals Board 1025 Escobar Street 1st Floor Martinez, CA 94553

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https://www.contracosta.ca.gov/2924/Assessment-Appeals
Assessment Appeal Application (PDF)

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https://www.contracosta.ca.gov/FAQ/Topic?mobile=ON&topic=30
If you own and occupy your principal place of residence on January 1, you may apply for a Homeowner's Exemption that would exempt $7,000 of your home's assessed value from taxation.

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https://www.contracosta.ca.gov/FAQ/Topic?mobile=ON&topic=30
A veteran who is rated 100% disabled, blind, or a paraplegic due to a service-connected disability incurred while in the armed forces (or the unmarried surviving spouse of such veteran) may be eligible for an exemption

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https://www.contracosta.ca.gov/1756/Service-Fee
Contra Costa County Treasurer-Tax Collector

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https://www.contracosta.ca.gov/1756/Service-Fee
(925) 608-9500

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https://www.contracosta.ca.gov/191/Assessor?NID=191
Welcome to the Contra Costa County Assessor’s Office.

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https://www.contracosta.ca.gov/191/Assessor?NID=191
925-313-7400

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