Everything you need to know — explained simply. No jargon.
SF Treasurer & Tax Collector
Website: sf.gov/topics/business-registration
Every business — even home-based — must register. No exceptions.
Visit sf.gov/topics/business-registration — look for "Business License," "Business Tax Certificate," or "Business Registration."
Most cities now have online applications. Some still use paper forms you mail or drop off.
You'll need: your business name, address, what you do, your SSN or EIN, and sometimes estimated annual revenue.
Typical cost in San Francisco: $91 base. Pay online or by check.
Usually takes 3–7 days. Physical businesses post their license where customers can see it.
A city license doesn't cover state requirements. See the California state guide.
Most San Francisco licenses need to be renewed every year. Missing it means a fine. Set a calendar reminder now.
⚠️ General information only — not legal advice. Always verify with your actual city or state office. Affiliate disclosure.