A freelance designer named Priya Shah wants to invoice clients as “Northlight Studio.” Her bank refuses to deposit a check made out to Northlight Studio into her personal account. The bank is not being difficult. Legally, Northlight Studio does not exist until she registers it.
That registration is a DBA, short for “doing business as.” It is also called an assumed name, fictitious business name or trade name, depending on the state. It is cheap and quick, but it is also widely misunderstood. This guide covers what it actually does, what it costs in four large states and what it does not protect.
What a DBA Does, in One Table
| A DBA does | A DBA does not |
|---|---|
| Let you use a business name other than your legal name | Create a separate legal entity |
| Let you open a business bank account under that name, in most banks | Protect your personal assets from business debts |
| Tell the public who owns the business | Give you exclusive rights to the name |
| Let an LLC or corporation run several brands under one entity | Change how you pay taxes |
| Satisfy state rules on using an assumed name | Replace any license or permit your trade needs |
The core idea is transparency. States want customers and creditors to be able to find the real person or company behind a business name.
Who Needs One
- Sole proprietors using any name but their own: Priya Shah selling as “Priya Shah” needs nothing. Selling as “Northlight Studio” needs a DBA.
- General partnerships: Unless the business name is made up of the partners’ surnames.
- LLCs and corporations using another brand: “Lopez Ventures LLC” running a bakery called “Rise and Grind” files a DBA for “Rise and Grind.”
Some states also treat adding words like “and Associates” or “Design” to your own name as an assumed name, so check your state’s rule before assuming you are exempt.
Real Fees and Rules in Four States
Filing is handled by the state, the county or both, depending on where you are.
| State | Where to file | Fee | Extra steps | How long it lasts |
|---|---|---|---|---|
| California | County clerk | $26 in Los Angeles County; about $23 to $67 elsewhere | Publish a notice in an approved newspaper once a week for four weeks, starting within 30 days of filing, then file proof | 5 years |
| Florida | State, through Sunbiz | $50 online | Advertise the name once in a local newspaper before registering | 5 years, ending December 31 of the fifth year |
| New York | Department of State, for LLCs and corporations | $25, plus $25 per county or $100 per New York City county | Sole proprietors file with the county clerk instead | Until amended or discontinued |
| Texas | Secretary of State, for LLCs and corporations | $25 | Sole proprietors file with the county clerk; entities no longer file at county level since 2019 | Up to 10 years |
California’s publication rule surprises many owners. The newspaper notice usually costs $30 to $200 on top of the county fee, and a lapsed name means filing and publishing all over again.
What a DBA Does Not Protect
This is where most of the confusion lies.
Personal Liability
A sole proprietor with a DBA is still a sole proprietor. If a client sues Northlight Studio or the business cannot pay a supplier, Priya’s personal savings, car and home equity can be at risk. A DBA changes the name on the sign, not who is responsible.
Exclusive Rights to the Name
Registering a DBA in one county does not stop someone in the next county, or even the same county in some states, from using the same name. It also does not protect you against a business that already owns a federal trademark.
For real protection, the order of strength runs roughly like this:
- DBA registration: Records that you use the name. Little or no exclusive right.
- LLC or corporation name: Usually blocks identical entity names in your state only.
- State trademark: Protects the name for goods or services within the state.
- Federal trademark with the USPTO: Nationwide rights for specific goods or services.
Before filing a DBA, search your state’s business database, the USPTO’s trademark search and the domain name you want. Building a brand on a name someone else owns can mean an expensive rebrand later.
DBA or LLC?
| Factor | Sole proprietorship with DBA | Single-member LLC |
|---|---|---|
| Personal liability protection | No | Yes, if run properly |
| Typical state cost | About $10 to $100, plus any publication | About $35 to $500 to form, plus annual fees in many states |
| Paperwork | Very little | Annual reports in most states |
| Taxes | Personal return, Schedule C | Personal return by default, or S corporation election |
| Credibility with larger clients | Lower | Higher |
| Running several brands | One DBA per brand | One LLC can file several DBAs |
A DBA alone often makes sense for low-risk work, such as a solo writer, tutor or consultant testing an idea. Once you sign leases, hire staff, work on clients’ property or take on meaningful contracts, an LLC is usually worth the extra cost. Many owners end up with both: an LLC as the legal entity and one or more DBAs as brand names.
Filing Step by Step
- Search the name: Check your state business database, county records if applicable, the USPTO trademark search and domain availability.
- Find the right office: Your Secretary of State website explains whether DBAs are filed with the state, the county or both.
- File the form: You will need the business name, owner’s legal name, business address and type of business. Many states allow online filing.
- Publish, if required: California, Florida and several other states require a newspaper notice. Keep the proof.
- Get an EIN, if needed: Sole proprietors can use their Social Security number, but an EIN from the IRS is free and keeps your SSN off invoices and bank forms.
- Open the business bank account: Bring the DBA certificate and ID. Some banks also ask for an EIN letter.
- Calendar the renewal: Several states and counties do not send reminders.
Common Mistakes
- Assuming the DBA protects your assets: It does not. Only a properly run entity, plus insurance, does that.
- Filing in the wrong county: In county-filing states, you usually file where the business is based, and sometimes in every county where you operate.
- Skipping publication: In states that require it, an unpublished DBA may not be valid.
- Letting it lapse: An expired DBA can cause problems with banks, payment processors and contracts signed in that name.
- Forgetting other licenses: A DBA is not a business license, sales tax permit or professional license.
Frequently Asked Questions
How much does a DBA cost?
Usually $10 to $100 in state or county fees. In California, Florida and other publication states, add $30 to $200 or more for the newspaper notice.
Do I need a DBA if I have an LLC?
Only if the LLC operates under a name different from its exact registered name, including its “LLC” ending in some states. “Lopez Ventures LLC” operating as “Rise and Grind” needs one.
Can I have more than one DBA?
Yes. A sole proprietor or a single LLC can register several DBAs, one for each brand. Each usually needs its own filing and fee.
Does a DBA need its own tax ID?
No. A DBA uses the owner’s tax ID: the owner’s SSN or EIN for a sole proprietor, or the entity’s EIN for an LLC or corporation.
