How to Register a DBA in California

File With Your County Clerk, Not the Secretary of State

California is one of the states that handles DBA registration entirely at the county level. You file a Fictitious Business Name Statement with the county clerk-recorder in the county where your business has its principal place of business, not with the California Secretary of State. If your LLC is registered with the Secretary of State for formation purposes, that's a separate filing from the DBA; the Secretary of State's office doesn't process fictitious business name statements at all.

The Base Fee Is $10, but Expect to Pay More Locally

Business and Professions Code Section 17913 sets the form and content requirements for the statement, and the base statutory fee for the first business name and owner is $10, with $2 for each additional name or owner on the same statement. Government Code Section 54985 lets a county set a higher fee to recover its full cost of processing the filing, so many counties charge significantly more than the $10 base. Sonoma County, for example, charges $55 for filing and indexing the statement, which includes one certified copy, plus $9 for each additional business or owner name on the same statement. Check your specific county clerk's fee schedule before filing, since the actual cost can vary significantly from one California county to the next.

Complete the Required Newspaper Publication

After filing, Business and Professions Code Section 17917 requires you to publish the statement within 45 days, in a newspaper of general circulation in the county where the fictitious business name statement was filed. Government Code Section 6064 sets the publication schedule itself: once a week for four successive weeks, with at least five days between each publication date. After publication is complete, you have another 45 days to file an affidavit of publication with the county clerk; most counties, including Sonoma, maintain a list of adjudicated newspapers that qualify for this purpose. Skipping this step, or missing either 45-day window, can leave your registration incomplete even though your initial filing with the county clerk was accepted.

Plan for a Multi-Month Timeline

Because of the publication requirement, the full process from initial filing to a complete, publicly documented registration commonly spans two to three months, even though the county clerk's own initial processing of your statement might take only a day or two in person. If you're planning to use the name by a specific date, start the filing well ahead of that date to account for the newspaper's own publication schedule and the two separate 45-day windows.

The Registration Lasts Five Years, With an Important Exception

Per Business and Professions Code Section 17920, a fictitious business name statement expires five years from the date it was filed with the county clerk. It also expires 40 days after any change in the facts set out in the statement, such as your business address or ownership, meaning a change during the five-year term requires filing a new statement rather than simply amending the old one. Set a renewal reminder well before the five-year mark, and treat any business change, like a move, as its own trigger for a new filing.

Who Needs to File

California's fictitious business name law applies broadly: Business and Professions Code Section 17900 defines its scope to include individuals, partnerships and associations, domestic and foreign corporations, limited partnerships, and LLCs, all under the same statute. Whether you're a sole proprietor, a partnership, or an LLC, the same county-level process, publication rule, and five-year term generally apply; confirm with your specific county clerk if you have questions about how your particular business type should complete the form.

If You're Forming an LLC in California Too

If you're newly forming an LLC in California and plan to operate under a different public name from the start, you'll need both filings: Articles of Organization (Form LLC-1) with the Secretary of State to form the LLC itself, and a separate Fictitious Business Name Statement with your county clerk for the DBA. See our California LLC guide for the Secretary of State's formation process and fees.

Confirm Your County's Exact Fee Before You File

California's county-by-county fee variation is significant enough that assuming the $10 statutory base is your total cost can leave you underpaying. Check your specific county clerk-recorder's current fee schedule, which is usually posted online, before submitting your statement and payment.

Keep Proof of Publication With Your Records

Once publication is complete and you've filed the affidavit of publication, keep a copy with your business records alongside the original statement. Some banks and licensing agencies may ask to see proof that the full process, not just the initial filing, was completed.

A Move Within California Still Requires a New Filing

Since a change of address expires the statement after 40 days, moving your business, even within the same state, means filing a new Fictitious Business Name Statement in the county of your new principal place of business, and generally completing publication again under that new filing.

Not Legal Advice

County-level fees, publication requirements, and accepted newspapers vary across California's counties and can change. Confirm current requirements directly with your specific county clerk's office, and verify any statute cited here on the official California Legislative Information site (leginfo.legislature.ca.gov) before filing.