California note
San Francisco business registration runs through the Treasurer
San Francisco businesses usually register with the Treasurer & Tax Collector within 30 days of starting business activity and renew each year.
San Francisco treats business registration as a city tax step. If you start doing business in the city, check the Treasurer & Tax Collector page early.
Plan around the 30-day window after business starts. Registration is normally valid for one year, from April 1 through March 31. Renewal usually comes due by the last day of February.
This can matter even without a storefront. A person working for themselves may need to check. So may a company with a local office, a landlord with rental business income, or some out-of-city businesses working in San Francisco. An exemption or special rule can change the answer, so read the official page before assuming you are outside the system.
Think of this as one layer in the stack. Business registration does not replace zoning, building permits, health permits, fire review, seller permits, state filings, or work licenses. It is the local tax-registration step.
Before applying, gather the business name, owner details, start date, address, and what the business does. Those plain details keep the form from turning into a guessing game.
Where to see it
San Francisco Treasurer & Tax Collector business registration page.
Official sources
Official pages
Reviewed July 3, 2026
Current rules, forms, fees, deadlines, maps, and office instructions.
Rules, forms, fees, deadlines, and office procedures can change. Check the current page before you file, pay, or rely on a date.
Connected places
Open the local directory
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