San Francisco's business community, home to several Fortune 500 firms and over 60,000 thriving small businesses, is a fuel for our economic vitality. Consistently ranked as a top city in which to do business, the City of San Francisco offers a range of resources to businesses including incentives, training, access to capital and Connecting Business to City Services. Below are some links that you may find interesting and useful.
Small Business Assistance Center
SFProspector

Starting a Business:
Fictitious Business Names (FBN)
Starting a Business
Doing Business:
Business FAQs
Fictitious Business Name Search
Business Opportunities with the San Francisco Redevelopment Agency
Business Recycling Services
Doing Business in San Francisco, General Information
Doing Business with the City and County of San Francisco (PDF)
Forms for Business
Grants
Labor Standards for SF Employers
Loans
Mayor's Office of Business and Economic Development
Local Business Enterprise Advisory Committee
Purchasing (Office of Contract Administration)
SF Green Business Program
Taxes, Permits and Licenses
Board of Appeals (Permit Appeals)
Business License
Business Tax Filing (online)
Business Tax and Fee Calendar
Electrical, Plumbing, and Simple Building Permits(online, registration required)
Enterprise Zone Tax Credit
Film License
Getting a City Building Permit
Tax Credits
Understanding Business Taxes

Board of Appeals
Building Inspection, Department
Contract Administration, Office
County Clerk, Office
Mayor's Office of Business and Economic Development
Mayor's Office of Community Development
Mayor's Office of Public Finance
Redevelopment Agency
Small Business Commission (SBC)
Treasurer-Tax Collector, Office
Other Related Business Links (external)