Sonoma, CA Local Taxes & Fees: Business Tax Classification (2026)
Key Facts
- Classification A/B rate
- $74 first employee, $31 each additional
- Classification C rate
- $186 first professional, $31 additional
- Classification D rate
- $74 plus $1 per $1,000 construction value
- Classification E wholesale
- Exempt from license tax
- Annual due date
- January 1 each year
- Delinquency penalty
- 10% per month, no waiver
- Violation penalty
- Misdemeanor under Ch. 1.12 SMC
Summary
Every business operating inside the City of Sonoma must pay an annual license tax under one of five classifications, A through E, set by Chapter 5.08 of the Sonoma Municipal Code. Retail sellers, service providers, professionals, contractors and wholesalers or manufacturers are each taxed on a different schedule tied mainly to employee count.
Every person who engages in business within the city shall pay a license tax at the rates as set out in SMC 5.08.020 through 5.08.060. ... Every business engaged in selling to the general public, at retail in the city, goods, wares, merchandise or commodities, including restaurants and other food dispensers, unless otherwise provided for in Chapters 5.04 and 5.08 SMC, shall pay an annual license tax based upon average number of persons employed during the previous calendar year at the following rates: One employee $74.00 Each additional employee $31.00
Official source re-checked September 8, 2026: no newer edition of the code had been published (publisher’s edition: current through Ordinance 13-2025, passed December 3, 2025).
Full Breakdown
060. 00 for each additional employee, based on the prior calendar year's average headcount. Classification B covers service businesses, from auto repair to travel agencies, at the identical $74/$31 rate. 00 for each other employee. 00 per $1,000 of estimated construction value, paid when the building permit issues. 00 minimum; a Classification E business with gross receipts under $3,000 pays only 50 percent of the schedule rate. 200, the annual tax is due January 1, with new operations begun after July 1 prorated 50 percent for the remaining six months, and payment required within five days of the tax collector's mailed notice.
The collector may suspend a license after 60 days of delinquency and may enter, with an inspection warrant, any place of business to demand exhibition of the license.
Violations & Fines
Unpaid tax draws a 10 percent penalty on the first day of each month it remains delinquent, added automatically with no waiver authority given to the collector, per SMC 5.04.210. Operating without paying, or misrepresenting facts to obtain a license, is a misdemeanor under SMC 5.08.210, punishable as set out in Chapter 1.12 SMC, and the city may also sue to collect the tax and penalties as a civil debt.
Frequently Asked Questions
Which tax classification applies to a Sonoma retail shop?
How much does a Sonoma contractor pay for a business license?
What happens if a Sonoma business license tax is paid late?
Are wholesale businesses taxed in the City of Sonoma?
Sources & Official References
Other rules in Sonoma
California rules heatmap·Compare Sonoma to another location·View the California local taxes & fees overview
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Business Tax Classification in Nearby Cities
How other cities in Sonoma County handle business tax classification.