Business Licenses

All businesses operating within Sonoma city limits are required to file a business license annually, as mandated by Sonoma Municipal Code 5.04. This requirement applies to all types of businesses—whether you're an individual, partnership, corporation, sole proprietor, subcontractor, independent contractor, nonprofit, or a home-based business.

Please note that obtaining a business license does not grant permission to operate. Businesses must comply with all applicable federal, state, and local regulations to be fully authorized.

Key Information:

  • Annual License Period: January 1 – December 31.
  • Payment Deadline: All annual license fees are due by February 1.
  • New Businesses: Business license taxes must be paid prior to beginning operations.
  • License Tax Structure: The City of Sonoma uses a flat-rate license tax (not based on gross receipts) with additional charges for most businesses based on the number of employees.

Partnering with HdL Companies

To simplify the business license process, the City of Sonoma has partnered with HdL Companies, an industry leader in business license administration. The HdL Business Support Center provides Sonoma businesses with comprehensive support, including:

  • Assistance with applications and renewals.
  • Handling payments and tax calculations.
  • Issuance of business license certificates.
  • Answers to general inquiries.

How to Contact HdL

For immediate assistance or to request an application by mail, contact the HdL Business Support Center:

HdL is here to make the business license process straightforward and stress-free—so you can focus on running your business!

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