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  • Writer's pictureO'Neill Tran Law


A “doing business as” (DBA) called a Fictitious Business Name in California, is a name that a business uses in practice that differs from its official registered name. For example, if you registered your business with the Secretary of State as “Katie’s Lawyer Services, LLC”, but you operate your business as “Awesome Lawyers”. “Awesome Lawyers” would be the DBA of “Katie’s Lawyer Services”.

How to register a DBA in CA

In the state of California Fictitious Business Names (also known as DBAs) are not registered at the state level, instead they are filed with the County Clerk in the county in which the principal place of business is located.

To determine how to file in your specific county, please see our county specific articles listed below. If your county is not listed, please contact O’Neill Tran Law today at for additional information.

County Specific DBA information:

While this article strives to provide information on filing DBAs in California, we highly recommend that you speak with your business attorney for further guidance.

For more information on whether your business needs a DBA please see What is a DBA and does my business need one? or contact O’Neill Tran Law at

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