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Alameda, California · County government

Treasurer-Tax Collector

Find property tax bills, payment options and tax collection services. Find the local office for a business license or business tax certificate. Check the business activity and place covered by each service.[7]

Source checked October 12, 2026[1]
Go to the official website (opens in a new tab)
Website address
treasurer.acgov.org

Opens this office’s own website. CountyWiki does not process applications, take payments or provide personal records.

Contact details & office locations ↓
Serves Alameda County, California. Use the official service instructions to confirm jurisdiction and appointment requirements.

Online services & information

These links were found on official source pages. Each service is handled by the office.

Property tax payment options (opens in a new tab)[2]Official instructions

Official Alameda County property-tax instructions and payment options. Follow the county’s instructions for your bill type and review the amount and any payment charges before paying.

County business-license requirements — unincorporated areas (opens in a new tab)[8]Official instructions

Check county licensing requirements before applying. Businesses operating within incorporated city limits must use their city authority.

Service area: Alameda County business licensing is for the unincorporated area; use city licensing within incorporated city limits. [9]

Before you start

Eligibility & access
Use the county only for unincorporated-area business licensing. City businesses should contact their city. [10]
Start a new Alameda County business-license application (opens in a new tab)[11]Online service

Official county referral to the business-license application portal. Confirm the jurisdiction first.

Service area: County business-license application for the unincorporated area, not incorporated cities. [12]

Renew an Alameda County business license (opens in a new tab)[13]Online service

Use the county portal with the account number and PIN from your renewal notice.

Service area: County business-license renewal for the unincorporated area. [14]

Before you start

Information & documents · Online renewal
Have the account number and assigned PIN from the renewal notice ready. [15]
Payments · Online renewal only
Online renewal uses a credit card with a 2.3% convenience charge. Other payment methods are available by mail or in person. [16]
Close an existing Alameda County business license (opens in a new tab)[17]Online service

Official county portal referral for an existing business-license account.

Service area: Closure of an existing Alameda County business-license account. [18]

Fees

Fees are quoted only when a source document supports the amount and conditions.

Fee amounts have not been reviewed for this office.

Check the official website for its current fee schedule. No fee should be assumed to be free.

Forms & documents

Official forms and document pages for this office’s services.

Sources & last checked4 source pages · 20 citations

Sources were checked by an AI-assisted research process. A checked website does not mean every service or fee on it has been reviewed.

  1. [1] Alameda County — departments directory (opens in a new tab)

    Alameda County · Department directory: Treasurer-Tax Collector
    Source reviewed October 12, 2026

    View supporting excerpt
    Department Website
  2. [2] Alameda County — Tax Collection | Treasurer Tax Collector (opens in a new tab)

    Alameda County tax collector · Current county property-tax service heading or explicitly linked destination; bill type and payment channel are reviewed separately.
    Source reviewed October 14, 2026

    View supporting excerpt
    HOME TREASURY TAX COLLECTION DEFERRED COMPENSATION CONTACT US Select Page TAX COLLECTION  PAY YOUR PROPERTY TAX Pay your secured, supplemental or unsecured property tax. Pay Now
  3. [3] Alameda County — Contact Us | Treasurer Tax Collector (opens in a new tab)

    Alameda County tax collector · Property Tax Collection — specific tax-collection contact block; visitor, mail, telephone and branch purposes kept separate.
    Source reviewed October 14, 2026

    View supporting excerpt
    ATION CONTACT US Select Page CONTACT US  PROPERTY TAX COLLECTION 1221 Oak Street, Room 131 Oakland, CA 94612 (510) 272-6800 (510) 272-6807 – FAX Call Center Hours: 8:30 a.m. – 4:30 p.m. Office Hours: 8:30 a.m. – 4:30 p.m. Email Property Tax Collection  BUSINESS LICENSE TAX 224 W. W
  4. [4] Alameda County — Contact Us | Treasurer Tax Collector (opens in a new tab)

    Alameda County tax collector · Property Tax Collection — specific tax-collection contact block; visitor, mail, telephone and branch purposes kept separate.
    Source reviewed October 14, 2026

    View supporting excerpt
    OME TREASURY TAX COLLECTION DEFERRED COMPENSATION CONTACT US Select Page CONTACT US  PROPERTY TAX COLLECTION 1221 Oak Street, Room 131 Oakland, CA 94612 (510) 272-6800 (510) 272-6807 – FAX Call Center Hours: 8:30 a.m. – 4:30 p.m. Office Hours: 8:30 a.m. – 4:30 p.m. Email Property Tax Collection  BUSINESS LICEN
  5. [5] Alameda County — Contact Us | Treasurer Tax Collector (opens in a new tab)

    Alameda County tax collector · Property Tax Collection — specific tax-collection contact block; visitor, mail, telephone and branch purposes kept separate.
    Source reviewed October 14, 2026

    View supporting excerpt
    reet, Room 131 Oakland, CA 94612 (510) 272-6800 (510) 272-6807 – FAX Call Center Hours: 8:30 a.m. – 4:30 p.m. Office Hours: 8:30 a.m. – 4:30 p.m. Email Property Tax Collection  BUSINESS LICENSE TAX 224 W. Winton Ave., Room 169 Hayward, CA 94544 (510) 670-6400 (510) 670-6404 – FAX Office Hours: 8:30 a.m.
  6. [6] Alameda County — Contact Us | Treasurer Tax Collector (opens in a new tab)

    Alameda County tax collector · Property tax call center — specific tax-collection contact block; visitor, mail, telephone and branch purposes kept separate.
    Source reviewed October 14, 2026

    View supporting excerpt
    US  PROPERTY TAX COLLECTION 1221 Oak Street, Room 131 Oakland, CA 94612 (510) 272-6800 (510) 272-6807 – FAX Call Center Hours: 8:30 a.m. – 4:30 p.m. Office Hours: 8:30 a.m. – 4:30 p.m. Email Property Tax Collection  BUSINESS LICENSE TAX 224 W. Winton Ave., Room 169 Hayward, CA 94544 (510) 670-6400 (510) 67
  7. [7] Alameda County — business licensing discovery (opens in a new tab)

    Alameda County official website · Reviewed business licensing instructions
    Source reviewed October 16, 2026

    View supporting excerpt
    You must obtain a business license from Alameda County only if you are conducting any type of business, including leasing residential and commercial property, or your business is based in an unincorporated area of Alameda County. DO NOT APPLY TO ALAMEDA COUNTY IF YOU OPERATE A BUSINESS WITHIN CITY LIMITS.
  8. [8] Alameda County — business licensing discovery (opens in a new tab)

    Alameda County official website · Reviewed business licensing instructions
    Source reviewed October 16, 2026

    View supporting excerpt
    You must obtain a business license from Alameda County only if you are conducting any type of business, including leasing residential and commercial property, or your business is based in an unincorporated area of Alameda County. DO NOT APPLY TO ALAMEDA COUNTY IF YOU OPERATE A BUSINESS WITHIN CITY LIMITS.
  9. [9] Alameda County — business licensing discovery (opens in a new tab)

    Alameda County official website · Reviewed business licensing instructions
    Source reviewed October 16, 2026

    View supporting excerpt
    You must obtain a business license from Alameda County only if you are conducting any type of business, including leasing residential and commercial property, or your business is based in an unincorporated area of Alameda County. DO NOT APPLY TO ALAMEDA COUNTY IF YOU OPERATE A BUSINESS WITHIN CITY LIMITS.
  10. [10] Alameda County — business licensing discovery (opens in a new tab)

    Alameda County official website · Reviewed business licensing instructions
    Source reviewed October 16, 2026

    View supporting excerpt
    You must obtain a business license from Alameda County only if you are conducting any type of business, including leasing residential and commercial property, or your business is based in an unincorporated area of Alameda County. DO NOT APPLY TO ALAMEDA COUNTY IF YOU OPERATE A BUSINESS WITHIN CITY LIMITS.
  11. [11] Alameda County — business licensing discovery (opens in a new tab)

    Alameda County official website · Reviewed business licensing instructions
    Source reviewed October 16, 2026

    View supporting excerpt
    New Alameda County Business License
  12. [12] Alameda County — business licensing discovery (opens in a new tab)

    Alameda County official website · Reviewed business licensing instructions
    Source reviewed October 16, 2026

    View supporting excerpt
    You must obtain a business license from Alameda County only if you are conducting any type of business, including leasing residential and commercial property, or your business is based in an unincorporated area of Alameda County. DO NOT APPLY TO ALAMEDA COUNTY IF YOU OPERATE A BUSINESS WITHIN CITY LIMITS.
  13. [13] Alameda County — business licensing discovery (opens in a new tab)

    Alameda County official website · Reviewed business licensing instructions
    Source reviewed October 16, 2026

    View supporting excerpt
    Business License Renewal To renew online, you must have received a Renewal Notice with your Account # and assigned PIN # (Personal Identification Number).
  14. [14] Alameda County — business licensing discovery (opens in a new tab)

    Alameda County official website · Reviewed business licensing instructions
    Source reviewed October 16, 2026

    View supporting excerpt
    You must obtain a business license from Alameda County only if you are conducting any type of business, including leasing residential and commercial property, or your business is based in an unincorporated area of Alameda County. DO NOT APPLY TO ALAMEDA COUNTY IF YOU OPERATE A BUSINESS WITHIN CITY LIMITS.
  15. [15] Alameda County — business licensing discovery (opens in a new tab)

    Alameda County official website · Reviewed business licensing instructions
    Source reviewed October 16, 2026

    View supporting excerpt
    To renew online, you must have received a Renewal Notice with your Account # and assigned PIN # (Personal Identification Number).
  16. [16] Alameda County — business licensing discovery (opens in a new tab)

    Alameda County official website · Reviewed business licensing instructions
    Source reviewed October 16, 2026

    View supporting excerpt
    Payment for online renewals must be made by credit card and will include a convenience fee of 2.3%. Other payment methods are available if you renew by mail or in person.
  17. [17] Alameda County — business licensing discovery (opens in a new tab)

    Alameda County official website · Reviewed business licensing instructions
    Source reviewed October 16, 2026

    View supporting excerpt
    Renew or Close Existing Alameda County Business License
  18. [18] Alameda County — business licensing discovery (opens in a new tab)

    Alameda County official website · Reviewed business licensing instructions
    Source reviewed October 16, 2026

    View supporting excerpt
    You must obtain a business license from Alameda County only if you are conducting any type of business, including leasing residential and commercial property, or your business is based in an unincorporated area of Alameda County. DO NOT APPLY TO ALAMEDA COUNTY IF YOU OPERATE A BUSINESS WITHIN CITY LIMITS.
  19. [19] Alameda County — business licensing discovery (opens in a new tab)

    Alameda County official website · Reviewed business licensing instructions
    Source reviewed October 16, 2026

    View supporting excerpt
    Alameda County Business License Tax FAQ's
  20. [20] Alameda County — business licensing discovery (opens in a new tab)

    Alameda County official website · Reviewed business licensing instructions
    Source reviewed October 16, 2026

    View supporting excerpt
    City Business License Tax Offices
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