Yes — in most cases, you do have to register a DBA in California. State law requires any business operating under a name that doesn’t match the owner’s legal name or the entity’s exact registered name to file a Fictitious Business Name (FBN) statement with the county clerk within 40 days of starting to use that name, and then publish it in a local newspaper within another 45 days.1California Legislative Information. California Code BPC 17917 – Fictitious Business Names Skip it and you can’t enforce contracts made under that name in California courts.
Who Has To File
Whether a DBA (what California calls a Fictitious Business Name) is required depends on your business structure and whether the name you use matches your legal identity on paper. The rules come from Section 17900 of the California Business and Professions Code.2Justia Law. California Code BPC 17900-17930 – Fictitious Business Names
- Sole proprietors. You need to file if your business name doesn’t include your surname, or if it suggests other owners exist. “Premier Consulting” run by Jane Torres requires registration; “Torres Consulting” does not. Add “Associates,” “and Company,” or “and Sons” to your surname and you’re back on the hook, because those words imply additional owners.
- Partnerships. The business name must include the surname of every general partner. If even one partner’s name is missing, or the name hints at unnamed owners, you need to file.
- Corporations, LLCs, and limited partnerships. Any name that differs from the exact legal name on file with the California Secretary of State counts as fictitious. If “Acme Holdings LLC” does business as “Coastal Real Estate,” that second name needs an FBN filing.
When You Don’t Need a DBA
If your business name already matches your legal name — a sole proprietor using their own surname with no “and Company” dressing, or a corporation operating under its exact registered name — no FBN is required. The filing exists to connect a trade name to the real person or entity behind it; when the name itself already does that, there’s nothing to connect.
Where, When, and What It Costs To File
You file with the county clerk in the county where your principal place of business is located. If your business has no physical California location, you file in Sacramento County.2Justia Law. California Code BPC 17900-17930 – Fictitious Business Names There is no statewide registry; every filing is a county-level record.
The statutory deadline is 40 days from the date you first start doing business under the name.2Justia Law. California Code BPC 17900-17930 – Fictitious Business Names In practice, most banks won’t open a business checking account under a trade name without a certified copy of the filed statement, so you’ll likely want to file before you need banking.
The form itself is available from your county clerk and follows a template set out in Section 17913.3California Legislative Information. California Code BPC 17913 – Fictitious Business Names You’ll list the fictitious name or names, a physical street address (P.O. boxes aren’t accepted), the registrant’s legal name and address, the business type, the date you started using the name, and a signed declaration.
Fees vary by county. Los Angeles County charges $26 for one name and one registrant, with $5 for each additional name or registrant.4LA County Registrar-Recorder/County Clerk. Fictitious Business Name Fees Alameda County charges $40 for one name and one owner, plus $7 for each addition.5Alameda County Clerk-Recorder. Fictitious Business Name Filing Fees Expect roughly $26 to $75 depending on your county and the number of names and owners.
The Newspaper Publication Step
Filing is only half the job. California also requires you to publish the FBN information in an adjudicated newspaper of general circulation in the county where you filed. The first publication has to appear within 45 days of your filing date, and there are no extensions.1California Legislative Information. California Code BPC 17917 – Fictitious Business Names Miss that window and the entire filing becomes ineffective.
The notice runs once per week for four consecutive weeks, and the published content must match the filed statement exactly. Most qualifying newspapers offer flat-rate packages, and prices vary widely, so a smaller adjudicated paper in your county is often substantially cheaper than a major daily.
After the four-week run, the newspaper issues an affidavit of publication. You then have 45 days to file that affidavit with the same county clerk.1California Legislative Information. California Code BPC 17917 – Fictitious Business Names This is where people slip. The newspaper does its part, mails the affidavit, and it sits in a pile. If it never reaches the county clerk, your FBN is treated as invalid.
What Happens If You Don’t Register
The most painful consequence isn’t a fine. Under Section 17918, a business operating under an unregistered fictitious name cannot maintain a lawsuit on any contract or transaction conducted under that name.2Justia Law. California Code BPC 17900-17930 – Fictitious Business Names If a client stiffs you on a $50,000 invoice, you can’t sue to collect until you go back and complete every step: the filing, the publication, and the proof of publication. The right to sue isn’t lost permanently, only frozen until you’re in compliance, but delays in collection rarely favor the person owed money.
Separately, knowingly filing a false FBN statement is a misdemeanor carrying a fine of up to $1,000.2Justia Law. California Code BPC 17900-17930 – Fictitious Business Names That penalty targets deliberate deception, like listing a fake address or a fabricated owner, not honest mistakes.
Keeping the Registration Active
An FBN statement is valid for five years from the date of filing.6California Legislative Information. California Code BPC 17920 – Fictitious Business Names Put the expiration on a calendar, because it lapses on its own if you don’t renew. Renewing means filing a new statement before the five-year mark. If nothing has changed and you file in time, you don’t have to repeat the newspaper publication.7Solano County. Fictitious Business Name
Changes are a different story. If anything on the original statement changes — new owners, a different business structure, a new principal address, the name itself — the existing statement expires 40 days after the change.6California Legislative Information. California Code BPC 17920 – Fictitious Business Names You have that 40-day window to file a brand-new statement with the updated information, and the new filing goes through the full publication cycle again.
When you stop using the name altogether, you’re required to file a Statement of Abandonment with the same county clerk. The statute uses “shall,” so it isn’t optional.2Justia Law. California Code BPC 17900-17930 – Fictitious Business Names The abandonment also has to be published for four consecutive weeks, with the affidavit filed afterward.
A DBA Doesn’t Protect Your Business Name
This catches a lot of first-time owners off guard. Filing an FBN gives you no exclusive rights to the name. It’s a public notice document, not a claim of ownership. Another business in your county, or anywhere else, can file the identical name and operate alongside you legally. County clerks don’t screen for conflicts the way the Secretary of State does for corporations and LLCs.
If protecting the name matters, that’s trademark territory, which is a separate process. Common-law trademark rights develop from actual use in commerce but only within the geographic area where you do business. Federal registration with the U.S. Patent and Trademark Office provides nationwide protection and standing to stop others from using a confusingly similar name for similar goods or services. Treat the FBN as a compliance step and trademark as a brand-protection step; one does not do the work of the other.