Registering a DBA (Doing Business As / Fictitious Name)

beginner6 min read · updated 2026-06-20

Registering a DBA (Doing Business As / Fictitious Name)

A DBA — also called a fictitious name, trade name, or assumed name — is the public-facing name your business operates under when it differs from your legal name. If you are a sole proprietor named Jane Smith but you want to advertise as "Coastal Window Cleaning," that brand name is a DBA. If your LLC is registered as "BL Holdings LLC" but you sell under "Black Label Detailing," that storefront name is a DBA too.

Filing a DBA is one of the cheapest, fastest pieces of business setup. It is also one of the most misunderstood — so before the how-to, understand exactly what it does and does not do.

What a DBA actually does (and does not do)

A DBA is a registration of a name, not a business structure. Per the SBA, it lets you legally operate and advertise under a name other than your legal name, and many counties and cities require it if you use one. It does NOT:

• Create a separate legal entity. A DBA gives you zero liability protection. If you want personal-asset protection, you need an LLC or corporation — the DBA just renames it.
• Grant trademark rights. The SBA is explicit: for trademark protection you file separately with the U.S. Patent and Trademark Office (USPTO). Registering a DBA at the county does not stop a competitor in another state from using the same name.
• Give you a tax break or a tax ID. A DBA does not change how you are taxed, and it is not an EIN. You file separately for a federal tax ID if you need one.

What a DBA does give you: a legal name to put on signage, invoices, your website, and — critically — a name a bank will let you open a business checking account under and accept checks made out to.

Who needs one

• Sole proprietors / general partnerships operating under any name other than the owner's full legal name. (Jane Smith trading as "Jane Smith" usually needs nothing; "Coastal Window Cleaning" needs a DBA.)
• LLCs and corporations that want to run a second brand, product line, or storefront without forming a whole new entity. One LLC can hold many DBAs.
• Anyone who needs a business bank account under a brand name — banks routinely require a stamped DBA certificate.

Costs and timing

Filing fees are low. Across states, the initial DBA fee typically runs $10 to $150, with most states landing in the $20–$50 band. Florida, for example, charges a flat $50 and the registration stays valid for 5 years.

Where you file varies. The SBA notes you register with "the county clerk or state government, depending on where the business is located," and a few states do not require DBA registration at all. Roughly 21 states also impose a county-level assumed-name requirement on top of (or instead of) state filing — so always confirm both levels for your address.

Watch for publication requirements: several states (Florida, California, New York, and others) require you to publish a notice of the new name in a local newspaper, which adds cost and a few weeks. In Florida the name must be advertised at least once in a county newspaper before filing.

How to register a DBA: step by step

• Decide whether you even need one. If you operate under your exact legal name (sole prop) or your exact entity name (LLC/corp), you may not need a DBA. You need one when the public-facing name differs.
• Choose and screen the name. Search your Secretary of State's business-name database and your county's fictitious-name index to confirm it is not already taken. Also run a free search on the USPTO trademark database (TESS) so you do not build a brand on a name someone else owns nationally.
• Identify the right filing office. Determine whether your state files DBAs at the state level (Secretary of State / Division of Corporations) or county level (county clerk/recorder) — or both. The SBA business guide and your Secretary of State site will tell you.
• Complete the filing application. Provide the fictitious name, the legal name and address of the owner/entity, the type of business, and the entity's registration number if you are an LLC or corporation.
• Satisfy any publication requirement. If your state requires it, run the legal notice in an approved local newspaper for the required number of runs, and keep the affidavit/proof of publication.
• Pay the fee and submit. File online, by mail, or in person. Save the stamped/approved certificate — this is the document your bank will ask for.
• Open the business bank account. Take the approved DBA certificate plus your EIN (if you have one) to the bank to open an account in the brand name.
• Calendar the renewal. DBAs expire. Renewal cycles commonly range from every one to ten years (five is typical, as in Florida). Set a reminder before expiration so you do not lapse.

Common mistakes to avoid

• Treating a DBA like liability protection. It is not. If protecting personal assets matters, form an LLC or corporation first, then add the DBA as a brand on top of it.
• Skipping the trademark search. A county filing will not stop a cease-and-desist from a national trademark holder. Screen the name on USPTO before you print signage.
• Ignoring publication rules. In publication states, your DBA is not fully effective until the notice runs and the affidavit is recorded.
• Letting it lapse. An expired DBA can mean you are operating under an unregistered name — and may force you to re-publish and re-file from scratch.

Apply it

If you are launching a brand this month: pick the name, screen it at both the Secretary of State and USPTO, file the DBA at the correct level for your county, satisfy any publication step, and immediately open the bank account under the new name. Budget roughly $20–$50 for the filing in most states (more if your state requires newspaper publication), and put the renewal date in your calendar the same day you file.

---

Education only, not legal or tax advice. DBA requirements, fees, and publication rules vary by state, county, and city and change over time — verify current rules with your Secretary of State, county clerk, the SBA, or a licensed professional before filing.