Any person or company conducting business within the city limits of the City of Sonoma, whether ongoing or one-time only, is required to have an active business license. To apply for a business license, please download the business license application. You can determine the amount due for your license using the fee schedule listed on page 2. Payment is due when you register for a Business License and are renewed on an annual basis. For more information, contact the City Finance Department at (707) 938-3681.