The city wants its own license: business tax certificates, and how Los Angeles taxes contractors
In one paragraph
Your CSLB license lets you contract anywhere in California. It does not excuse you from the business license or business tax of the city you are based in, and often of the cities you work in. Los Angeles is the clearest example: a Business Tax Registration Certificate is mandatory, contractors pay $153 on the first $60,000 of gross receipts plus $1.01 per $1,000 above that, and a small business under $100,000 owes nothing only if it files the renewal on time. Here is how the city layer works and how to keep it from becoming a back-tax bill.
The rule
In the City of Los Angeles, every person engaging in business must obtain a Business Tax Registration Certificate or an exemption (Office of Finance). The contractor classification (LAMC 21.188) is taxed at $153.00 for the first $60,000 or less of gross receipts plus $1.01 per $1,000 or fraction above $60,000; a small business with $100,000 or less in total gross receipts qualifies for the exemption under LAMC 21.29 only if the Office of Finance receives its renewal on time.
Why it matters
The small business exemption is not automatic: miss the renewal and the whole year's tax is owed. Work in a city where you never registered and the city can assess back taxes when it finds you, and it finds contractors through permits. Registering in your home city and the cities you regularly pull permits in is cheap; the back-tax letter is not.