Key takeaways
- Some states file every DBA centrally (Florida, Pennsylvania). Others split them: companies file with the state, sole proprietors with the county (Texas, New York, Illinois).
- California DBAs are filed with the county clerk, so search the county where the business operates.
- The DBA record names the real owner, a person or a company, and a DBA doesn't stop anyone else using the same name.
What a DBA is
DBA stands for “doing business as”. You’ll also see fictitious business name, assumed name and trade name. A sole proprietor named Dana Ruiz who trades as “Ruiz Plumbing” files one. So does an LLC called Harbor Holdings LLC that runs a shop called “The Tool Bench”. The filing tells the public who’s actually behind the sign.
A DBA isn’t a business entity. It creates no liability shield and no separate tax status. It’s a label with a public record attached.
State or county?
This is the part that varies. In the states we’ve checked:
- Everything with the state: Florida (Division of Corporations, $50, good for 5 years) and Pennsylvania (Department of State, $70, plus a newspaper ad). Ohio’s state business search also covers trade names and fictitious names.
- Companies with the state, individuals with the county: Texas (since September 1, 2019, LLCs and corporations file only with the Secretary of State, and sole proprietors and general partnerships file with the county clerk), New York (companies with the Department of State, individuals and partnerships with the county clerk) and Illinois (LLCs with the Secretary of State, sole proprietors and general partnerships with the county clerk). Michigan LLCs and corporations file a Certificate of Assumed Name with LARA.
- The county, with a state index: North Carolina files assumed business names with the county Register of Deeds, and filings made since December 1, 2017 are in a statewide database on the Secretary of State’s site.
- The county: California (the county clerk).
If you’re not sure, the state’s business search page usually says whether assumed names are included.
How to search
- Start with the state business search and look for a “fictitious name”, “assumed name” or “trade name” option.
- If the state doesn’t file DBAs for that kind of business, go to the county clerk’s or recorder’s site for the county where the business operates. Many have an online index. Some only take requests in person or by mail.
- Search the trade name the way the public sees it, without “the” and without punctuation.
- Note the registrant, the filing date and the expiration. DBAs don’t last forever: California’s expire after 5 years, Florida’s on December 31 of the fifth year, and a Texas certificate can run for up to 10 years.
What the record tells you
You get the registrant’s name and address, which is the real party behind the trade name. If the registrant is a person, that’s the owner. If it’s a company, you now have a legal name to look up in the state business search, and from there the registered agent and, in some states, the managers. The how to find an LLC owner guide picks up from there.
The record also shows when the name was first filed, which helps if you’re thinking about using something similar. A DBA doesn’t give the registrant exclusive rights to the name, but a long history of using it locally can.
Frequently asked questions
Does a DBA show up in the state business search?
Sometimes. Florida and Pennsylvania register every fictitious name with the state, and Ohio's business search covers trade names and fictitious names. In Texas, New York and Illinois, only DBAs filed by companies are with the state. Sole proprietors file with the county. In California, DBAs are filed with the county clerk, so the state search won't show them.
Does registering a DBA protect the name?
No. A DBA filing is a public notice, not a right to the name. Texas, for example, says its assumed name filings don't stop anyone else filing the same name, and Pennsylvania's form says registration doesn't create any exclusive right. Rights in a name come from using it, and from trademark registration.
Who is behind a DBA?
The filing names the registrant, which is either a person (a sole proprietor or partners) or a company. If it's a company, look it up in the state business search to go further.
Sources
We take every fee, deadline and rule on this page from these pages and nowhere else. Rules change, so open the source before you pay anything.
- 1.Florida Division of Corporations: Fictitious name registrationChecked November 8, 2026
- 2.Pennsylvania Department of State: Fictitious namesChecked November 8, 2026
- 3.Texas Secretary of State: Name filings FAQs (assumed names)Checked November 8, 2026
- 4.New York General Business Law section 130Checked November 8, 2026
- 5.New York Department of State: Certificate of Assumed Name for LLCsChecked November 8, 2026
- 6.Illinois Secretary of State: Adopting an assumed LLC nameChecked November 8, 2026
- 7.DuPage County Clerk (Illinois): Assumed business namesChecked November 8, 2026
- 8.Michigan LARA: LLC forms (Certificate of Assumed Name)Checked November 8, 2026
- 9.North Carolina Secretary of State: Assumed business namesChecked November 8, 2026
- 10.Sonoma County Clerk-Recorder (California): Fictitious business namesChecked November 8, 2026
- 11.SBA: Choose your business nameChecked November 8, 2026
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