Contact Us

What’s next? Whether you have questions about the site, are ready to take the next step in starting your business, or just want to schedule some time to speak to a business counselor, we are here to help. Questions related to business registration, renewal, copies of certificates, PIN information, account balance, or making changes to your business account, please call the Office of the Treasurer and Tax Collector at (415) 701-2311. 

Last modified date: Thu, 06/30/2022 - 17:09

Business Registration and Tax Questions

The Office of the Treasurer & Tax Collector (TTX) has partnered with 311 to provide customer service to all San Francisco residents, businesses, and visitors. 311 is now the first point of contact for all inquiries to the Office of the Treasurer and Tax Collector. Please call (415) 701-2311. You can also submit your question by clicking on the link below. A representative will contact you on the SAME DAY of the request, if submitted prior to 7pm. Requests received after 7pm will receive a response by the next business day.


Speak with a Business Counselor

The Office of Small Business (OSB) and its Small Business Assistance Center (SBAC) function as the City’s central point of information and referral for entrepreneurs and small businesses in San Francisco, supporting an environment where small businesses can succeed and flourish.


To regularly receive updates on news, legislation, and events related to small business in San Francisco, sign up for the OSB newsletter.

Office of Small Business

  • City Hall, Room 140
    1 Dr. Carlton B. Goodlett Place
    San Francisco, CA 94102
  • (415) 554-6134
  • Office Hours: Monday-Friday 9 AM - 12 PM; 1 PM - 5 PM
  • Questions related to issuing and renewing business registration, obtain copies of your business or license certificate, tax payments, or edits to your business account, please contact the Office of the Treasurer and Tax Collector at 415-701-2311.

General Questions or After Hours

The San Francisco 311 Customer Service Center is the primary point of contact for City and County of San Francisco government general services. is the official site for obtaining information, reporting problems or submitting service requests to the City and County of San Francisco.


  • From San Francisco: 3-1-1
  • From outside San Francisco: (415) 701-2311
  • For speech-impaired citizens, the TTY direct line is (415) 701-2323
  • 24 hours a day, 365 days a year

Last modified date: Thu, 06/30/2022 - 16:48

Send a Message

Use the form below to contact a business counselor or inform us of technical difficulties with the Business Portal.


For questions related to business registration and renewals or filing your San Francisco gross receipts/payroll tax, see the Business Registration and Tax Questions section above.

Last modified date: Tue, 07/28/2015 - 14:01