DBA Registration Guide — Fictitious Business Name Filing, State Requirements, and Trademark vs. DBA (2026)

Before you start

What to know first

A DBA (Doing Business As) — also called a trade name, fictitious business name, or assumed name — is a name an LLC uses to conduct business that is different from its legal name as registered with the Secretary of State. For example, if 'Acme Holdings LLC' operates a coffee shop called 'Morning Brew Café,' it must register 'Morning Brew Café' as a DBA in states that require this registration for LLCs.
Not all states require LLCs to file a DBA when operating under a trade name. Some states (notably Wyoming and a handful of others) do not have a statutory DBA registration requirement for LLCs — the LLC can operate under any trade name without a formal filing. Most states do require a DBA filing, but the filing location varies: some require it with the county clerk (California, Florida for most counties), others with the state Secretary of State (Texas, New York, Colorado), and some require both. Always verify the specific requirement in the state where the LLC is operating.
An LLC needs a DBA — rather than a new entity — when it wants to market under a different name, operate multiple brands, or use a name that is more customer-facing than the formal legal name, without the overhead of forming a separate entity. A DBA does not create a new legal entity: all contracts, liabilities, and obligations incurred under the DBA belong to the underlying LLC. A DBA is purely a naming mechanism — it does not provide liability protection, tax benefits, or intellectual property rights.
An LLC should form a new entity — rather than a DBA — when: (1) it wants genuine liability isolation between business activities (a DBA under the parent LLC does not isolate liability); (2) it has or wants separate investors or owners for the new business; (3) it needs a separate tax filing and EIN; or (4) it is entering a highly regulated industry where a separate license or entity is required. A DBA is appropriate for brand variation; a new LLC is appropriate for legal separation.
DBA vs. trademark: registering a DBA gives an LLC the legal right to use that name for business in the jurisdiction of filing — but it provides no intellectual property protection. Two businesses can operate under the same DBA in different counties or states. A trademark, registered with the USPTO or at the state level, provides the exclusive right to use a name, logo, or mark in commerce nationally (USPTO) or statewide. If the business name has commercial value — particularly if it is a customer-facing brand that will be marketed, scaled, or licensed — trademark registration is required in addition to, not instead of, DBA registration.
Opening a bank account under a DBA: most banks require a certified copy of the DBA filing (a stamped or certified copy of the county clerk or SOS registration) plus the LLC's formation documents (Articles of Organization, EIN confirmation letter, and operating agreement) to open a bank account in the DBA name. A DBA does not get its own EIN — the underlying LLC's EIN is used for all DBA bank accounts and tax filings.
Multi-DBA strategy: an LLC can register multiple DBAs — one for each brand, product line, or customer segment it operates — without forming multiple entities. This is common for media companies, franchise operators, or LLC owners who run complementary businesses. All revenue and liability from each DBA flows to the parent LLC. Multi-DBA structures are appropriate when liability isolation between business lines is not a concern; if isolation matters, separate LLCs (or a Series LLC in enacting states) are more appropriate.

Documents

What you'll need

DBA registration application — form varies by state/county (county clerk form, SOS online form, or state-specific assumed-name certificate)
LLC legal name — exactly as registered with your state Secretary of State
LLC formation documents (for bank account opening) — Articles of Organization and EIN confirmation letter
Operating agreement — most banks require this as part of DBA bank account opening, to confirm LLC authority
Principal place of business address — physical address required in most DBA filings (PO boxes generally not accepted)
Newspaper affidavit of publication — required by some states/counties after DBA filing; the newspaper provides an affidavit of publication that must be filed with the county clerk to complete DBA registration
Certified copy of DBA filing — issued by the county clerk or SOS after registration; required by banks to open accounts in the DBA name

Process

Step by step

Confirm whether your state requires a DBA filing for LLCs Not all states require DBA registration. States with no DBA requirement or a very limited one for LLCs (as of 2026, verify current law): Wyoming (no statutory fictitious name requirement for LLCs); Delaware (LLCs can register a trade name but it is not required to use one). Most states do require registration: California (mandatory county-level fictitious business name filing); Texas (assumed name certificate with SOS required if the LLC operates under any name other than its exact legal name); Florida (SOS fictitious name registration for any entity operating under a name other than its legal name); New York (business certificate for assumed name with county clerk required). Verify the current requirement in each state where your LLC does business — state laws change and the threshold for 'operating under a different name' is interpreted differently.
Determine whether to file at the county level or the state level Filing location depends on the state: California — county recorder/clerk in the county of your principal place of business. Florida — Department of State Divisions of Corporations online (state-level fictitious name registration) or county clerk (some counties maintain their own registers). Texas — SOS assumed name certificate plus, for LLCs, a county assumed name filing in the county of the registered office. New York — county clerk in the county where the principal office is located. Colorado, Washington, New Mexico, Virginia — Secretary of State. When in doubt, file at both the county and state level — the cost is low and protects against local variations in the requirement.
Search for name availability and trademark conflicts Before filing a DBA, search: (1) your state's SOS database for existing assumed name registrations under the same name; (2) the USPTO trademark database (tmsearch.uspto.gov) for existing federal trademark registrations that could create an infringement claim; (3) the county clerk database in the relevant county (for county-level states). A DBA registration does not bar others from using a similar name unless you also have a trademark. Conversely, using a name already federally trademarked by another party — even after a successful DBA registration — creates trademark infringement liability. Search before you file and invest in branding.
File the DBA and complete any publication requirements File the DBA application with the applicable authority. Most state SOS offices accept online filings with immediate processing; county clerk filings may require in-person submission or mail. After filing: (1) California requires publication in a county newspaper once a week for four consecutive weeks and filing an affidavit of publication with the county clerk within 30 days of publication completion — failure to publish makes the DBA registration ineffective; (2) New York City counties require publication in two newspapers; (3) most other states do not require publication. Obtain a certified copy of the DBA filing from the clerk — you will need it for bank account opening.
Open a business bank account under the DBA name To open a bank account in the DBA name (e.g., 'Morning Brew Café' rather than 'Acme Holdings LLC'), bring to the bank: (1) certified copy of the DBA/fictitious name filing; (2) LLC Articles of Organization; (3) EIN confirmation letter (IRS SS-4 or online EIN confirmation); (4) operating agreement showing the signing member's authority; and (5) government-issued ID of the authorized signer. The account will use the LLC's EIN — not a new EIN — because the DBA is not a separate entity. Different banks have different documentation requirements; call ahead to confirm their specific DBA account requirements.
Set renewal reminders and monitor trademark conflicts DBA registrations expire. Set a renewal reminder 90 days before expiration: California (5-year renewal), Florida SOS (5-year renewal), New York (10-year renewal). Renew before expiration — lapsed DBAs may allow competitors to register the same name. After registration, monitor the USPTO trademark database quarterly for applications by third parties to register the same or confusingly similar name. If you plan to expand the brand nationally, file a USPTO trademark application now — a DBA alone does not prevent a competitor from registering your brand name as a federal trademark in states where you are not yet operating.

Costs

What it costs

Item	Amount	Notes
DBA filing fee — county clerk (CA, FL most counties, OH, PA, others)	$15–$50 per county	County-level DBA filing is the norm in California (where it is called a 'fictitious business name' and filed with the county recorder), Florida (most counties file with the county clerk, though Florida SOS also accepts fictitious name registrations), Ohio, and Pennsylvania. Filing with the county covers only that county — if the LLC operates in multiple counties, a separate filing may be required in each. Some counties require newspaper publication after filing.
DBA filing fee — Secretary of State (TX, NY, CO, WA, others)	$25–$100	States that require SOS-level DBA filing (called 'assumed name,' 'trade name,' or 'fictitious name' registration depending on the state): Texas ($25 assumed name certificate at SOS; additional county filing may be required for LLCs with principal offices in specific Texas counties), New York ($100 business certificate for assumed name at county clerk plus SOS notification), Colorado ($25 trade name at SOS), Washington ($5 master business license endorsement). State-level filing covers the entire state — no per-county filing required.
Newspaper publication (required in some states/counties)	$40–$100	Some states and counties require the LLC to publish notice of the DBA filing in a local newspaper after registration. California requires publication in a newspaper of general circulation in the county where the DBA is filed, once a week for four consecutive weeks. Florida's SOS fictitious name registration does not require publication; some Florida counties do. New York City counties require publication. Check your specific county and state requirements before assuming publication is or is not required.
Trademark registration — USPTO (federal, recommended for brand protection)	$250–$350 per class of goods/services	USPTO trademark registration provides nationwide exclusive rights to use the mark in commerce. A DBA provides only local-use priority — another business can register the same name as a federal trademark and potentially force the DBA user to rebrand. If the DBA name has commercial value, file a trademark application at the same time as the DBA registration. USPTO fee: $250–$350 per class (TEAS Plus vs. TEAS Standard). See the Trademark for LLC Guide for full treatment.
DBA renewal (biennial or periodic, varies by state)	$15–$50	DBA registrations expire and must be renewed. California: 5-year term, renewal required before expiration. Florida SOS fictitious name: 5-year term. Texas assumed name: perpetual (no expiration). New York: 10-year term. Set a renewal reminder at registration — an expired DBA may not be legally effective for contracts signed after expiration, and some states allow other businesses to register the same name once your DBA expires.

FAQ

Common questions

What is a DBA and when does an LLC need one?

A DBA (Doing Business As) — also called a fictitious business name, assumed name, or trade name — is a name an LLC uses in commerce that differs from its legal name on file with the Secretary of State. An LLC needs a DBA when it: (1) operates under a brand or marketing name that differs from the legal LLC name; (2) wants to operate multiple brands without forming separate entities; or (3) wants a more customer-friendly name than 'Acme Holdings LLC.' A DBA is a naming tool, not a new legal entity — all liability and obligations under the DBA belong to the underlying LLC.

Does every state require an LLC to register a DBA?

No — state requirements vary significantly. Most states require DBA registration when an LLC operates under any name other than its exact legal name, but a few (including Wyoming) have no statutory DBA requirement for LLCs. The filing location also varies: California requires county-level filing with the county recorder/clerk; Texas requires a state-level assumed name certificate with the SOS (plus county filing); Florida allows SOS-level registration online. Some states further require newspaper publication after the DBA filing. Verify the requirement in the specific state where your LLC is doing business — not just where it is formed.

Does a DBA protect my business name?

No — a DBA provides no intellectual property protection. It establishes only that your LLC is using a particular name in a specific jurisdiction, and it may provide local common-law priority for that name in the filing county or state. It does not prevent a competitor from: (1) using the same name in another county or state; (2) registering the name as a federal trademark (which would give them nationwide priority); or (3) filing for the same DBA name in a different county. For genuine name protection, you need a trademark registered with the USPTO or at the state level. File the trademark at the same time as the DBA — do not wait.

Can I open a bank account under a DBA name?

Yes — most banks allow LLCs to open accounts in a DBA name. Required documents: (1) certified copy of the DBA/fictitious name filing from the county clerk or SOS; (2) LLC Articles of Organization; (3) EIN confirmation letter; (4) operating agreement; and (5) government-issued ID of the authorized signer. The account uses the LLC's EIN — a DBA does not get its own EIN because it is not a separate entity. Requirements vary by bank; call ahead to confirm their specific documentation list. Note: if you use a registered-agent service, many bundle DBA filing and can provide certified copies directly.

What is the difference between a DBA and forming a new LLC?

A DBA adds a name to an existing LLC — it does not create a new entity. A new LLC creates a separate legal person. Use a DBA when: you want to market under a different brand name without the overhead of a new entity, and liability isolation between business activities is not a concern. Form a new LLC when: you need liability isolation between business activities (a DBA provides none), you have or want separate investors or owners for the new business, or you need a separate EIN and tax filing. The common misconception: a DBA does not protect one business line from the liabilities of another — all DBA operations are assets and liabilities of the same LLC.

Can an LLC have multiple DBAs?

Yes — an LLC can register multiple DBAs, one for each brand, product line, or customer segment, without forming multiple entities. This is common for media companies, multi-brand retailers, and service businesses that operate complementary divisions. Each DBA requires a separate registration (and in some states, a separate publication) in each jurisdiction. All revenue and liability from every DBA flow to the parent LLC. If liability isolation between business lines matters, use separate LLCs (or a Series LLC in enacting states) rather than multiple DBAs.

How long does a DBA registration last and what happens when it expires?

DBA duration varies by state: California fictitious business name — 5 years (must renew before expiration); Florida SOS fictitious name — 5 years; New York assumed name — 10 years; Texas assumed name certificate — perpetual (no expiration, but revocation requires a separate filing if the name is abandoned). When a DBA expires and is not renewed, the registration lapses. In most states, a lapsed DBA allows any other person to file the same name. Contracts signed in an expired DBA name may not be enforceable by the LLC. Set renewal reminders 90 days before the expiration date when you first register — calendar it immediately.

Provenance

Legal basis & official sources

Last verified 2026-05-08.

California: Cal. Bus. & Prof. Code § 17900 et seq. (fictitious business name — county-level registration and publication requirement). Texas: TX Bus. Org. Code § 5.051 et seq. (assumed name certificate — SOS + county clerk requirements); TX Bus. Org. Code § 71.051 (penalty for operating without assumed name certificate). Florida: Fla. Stat. § 865.09 (fictitious name registration with SOS Divisions of Corporations). New York: NY Gen. Bus. Law § 130 (business certificate for assumed name — county clerk filing). Colorado: CRS § 7-71-101 et seq. (trade name registration with SOS). Washington: RCW 19.80 (assumed business name). Trademark: 15 U.S.C. § 1051 et seq. (Lanham Act — federal trademark registration at USPTO).

Direct filing portal: https://sos.state.tx.us/corp/assumed.shtml

If you skip this

Operating under a trade name in a state that requires DBA registration without filing exposes the LLC to fines (up to $500 in Texas per violation), inability to enforce contracts signed in the unregistered trade name, and potential claims of unfair business practices
Relying on a DBA registration for brand protection instead of a trademark means any competitor can register your brand name as a federal trademark and force you to rebrand — even if you have been using the name for years in your local market
Missing DBA renewal deadlines allows competitors to register the same name in your jurisdiction and potentially forces a rebrand after years of brand investment
Failing to complete the newspaper publication requirement in California makes the DBA registration legally ineffective — contracts signed in the DBA name may be unenforceable by the LLC in California courts until the publication obligation is met
Opening a bank account without a certified DBA filing results in account rejection at most banks — the bank requires documentary proof that the LLC is legally authorized to operate under the DBA name
Using a DBA to avoid forming a new entity when genuine liability isolation is needed — a DBA does not create a liability barrier between business activities; a judgment against the LLC from any DBA operation reaches the LLC's full assets

Official sources

§ A Related guides

§ B Building permits

§ C Companion tools

Disclaimer: Informational only, not legal or tax advice. Rules change, so confirm with a business attorney or CPA before you act.