Cannabis Taxation
After the passage of Measure A, the Sonoma County Cannabis Business Tax on March 7, 2017, businesses engaged in the cultivation or manufacturing of cannabis/cannabis products within the unincorporated areas of Sonoma County are required to pay taxes. These tax rates are based on several factors including license type and business segment.
Information and forms for quarterly and semi-annually tax returns can be found on our Cannabis Tax Forms page.
For more information on Cannabis Tax Rates, legislation, permits, FAQs and other general information about the Sonoma County Cannabis Program, please visit the Cannabis Program website.
If you have any questions please contact the Tax Collector's Cannabis unit at cannabistax@sonomacounty.gov or (707) 565-7420.
Important Update for Mailed Tax Payments
The U.S. Postal Service has updated its postmarking procedures. Postmarks now reflect the date mail reaches a regional processing facility, rather than the date it is deposited at the local post office. As a result, postmark dates may be later than the date of mailing.
This change does not affect the Sonoma County Tax Collector's requirement that a valid USPS postmark is necessary to establish timely payment, per RTC 2512.
To ensure timely postmarking, the Sonoma County Tax Collector recommends doing one of the following:
- Request a manual postmark at the USPS counter
- Obtain a certificate of mailing from USPS
- Use registered or certified mail
- Mail tax payments well in advance of the due date
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