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County of Sonoma California
Economic Development Board

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Business Assistance Guide – Taxes and Reporting Requirements

All new businesses employing one or more persons must apply for a Federal Employer’s Identification Number (EIN) with the Internal Revenue Service. All new businesses operating in California employing one or more persons must apply for State Employer’s Identification Number with the Employment Tax Office of the Employment Development Department. All appropriate public agencies should be contacted directly for specific instruction concerning license, tax and related requirements and how often (quarterly, annually or monthly) forms, reports or payments must be filed with the taxing agency.

If You Have Employees

You must withhold and pay federal income tax, social security tax, and unemployment tax for all employees. As an employer in California, you must withhold and pay state employee income tax, state unemployment insurance tax, employment training tax and disability insurance tax.

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Sales Tax

All businesses selling tangible personal property must pay a percentage of total gross receipts to the California Board of Equalization. This sales tax is collected from the consumer or purchaser at the time of sale and may be composed of state, county and city taxes. Sales tax rates vary within the state. In Sonoma County, the sales tax is 7.5 percent. Some businesses may not be required to collect sales tax on certain services or goods, such as professional fees or groceries.

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Workman’s Compensation Insurance

All businesses employing one or more persons must insure the employee for a work-related injury. The rates depend on the nature of each employee’s occupation. California offers State Compensation Insurance or this can be obtained through private insurance groups.

  • Division of Workers’ Compensation (DWC): The homepage of the State of California’s Division of Workers’ Compensation.
  • DWC - Other Links: Links to other agencies that deal with worker’s compensation laws and requirements.
  • The Employment Development Department (EDD): Administers state unemployment and non-industrial disability insurance programs.
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