How to File a DBA in 2026: Costs and State Rules

A DBA is a name registration. That is the whole thing.

It lets you trade under a name other than your legal one. It creates no company, changes no tax treatment, and gives you no protection whatsoever if somebody sues. People confuse it with forming a business constantly, and the confusion is expensive.

Key takeaways

• A DBA is not a business entity. It gives you zero liability protection.
• Filing costs range from about $10 to $100 in most places, but the rules vary more than the price.
• California requires newspaper publication for four consecutive weeks and renewal every five years. New York requires neither.
• A DBA does not reserve your name against trademark claims. Only a trademark does that.
• If you want your personal assets protected, you need an LLC, not a DBA.

What a DBA actually is

DBA stands for "doing business as". Depending on your state it may be called a fictitious business name, an assumed name, or a trade name. Same thing.

It records, in a public register, that a particular legal person is trading under a particular name. Two situations use it:

• A sole proprietor trading under anything other than their own legal name. Jane Smith selling as "Riverside Bakes" needs a DBA.
• A registered company trading under a different name from its registered one. "Smith Holdings LLC" operating a shop called "Riverside Bakes" needs a DBA.

Banks generally require a DBA on file before they will accept cheques made out to the trading name. That is the most common practical reason people file one.

Is a DBA a business entity?

No, and this is the point worth being blunt about.

A sole proprietor with a DBA has exactly the same unlimited personal liability as a sole proprietor without one. Filing it feels like making the business official, and it changes nothing about what a creditor or claimant can reach. If asset protection is what you want, the comparison you actually need is LLC vs sole proprietorship.

What a DBA does not protect

Three common assumptions, all wrong:

It does not stop somebody else using the name. A DBA registration is usually county-level and administrative. It does not create trademark rights, and it does not prevent another business registering something similar.

It does not protect you from trademark claims. If your trading name infringes somebody's federal trademark, having filed a DBA is no defence. Search the USPTO trademark database before you print signage.

It does not separate your finances. Any liability incurred under the trading name lands on the legal person behind it, which for a sole proprietor is you personally.

What it costs, and why the rules matter more

The filing fee is usually small. The surrounding requirements are where the real variation sits, and where people get caught.

Read the California column. The $26 filing fee in Los Angeles is not the cost. Add four weeks of newspaper publication and the real figure is closer to $100 to $250, plus a diary note five years out.

Now read New York. No publication, no expiry, but a corporation filing an assumed name can face county surcharges that dwarf every other number on this page.

The lesson generalises. The advertised filing fee is a poor guide to what a DBA costs, because the expensive parts are procedural: publication in some states, surcharges in others, renewal cycles in others again. Check all three for your own county before assuming it is a $25 job.

How to file a DBA

The DIY route. Find whether your state registers DBAs at state or county level. Most are county, handled by the county clerk or recorder. Search the register for conflicts, complete the form, pay the fee, and complete any publication requirement inside the deadline. Diarise the renewal if your state has one.

The service route. Formation services file DBAs for roughly $99 plus state and county fees. What you are buying is somebody who knows which office handles it in your county and whether publication applies.

Worth being clear about which providers actually offer this. Of the five services we track, Swyft Filings and LegalZoom both file DBAs. ZenBusiness files them in certain states only. Tailor Brands does not offer a DBA product at all, and Northwest focuses on formation and registered agent service.

The honest calculation: if your county has no publication requirement and a simple online form, the DIY route takes half an hour and saves $99. If you are in a publication state, paying somebody who has done it before is defensible.

When you actually need one

• You are a sole proprietor trading under a name that is not your own
• Your registered company runs a second brand or shopfront under a different name
• Your bank will not accept payments made out to your trading name
• You are testing a brand before committing to a separate entity

When you need something else instead

• You want personal asset protection. Form an LLC.
• You want exclusive rights to the name. File a federal trademark with the USPTO.
• You want a separate business for tax purposes. A DBA does nothing here; see how to register a business.

Common questions

Does a DBA protect my personal assets? No. It is a name registration with no liability effect whatsoever.

Do I need a separate EIN for a DBA? No. The DBA belongs to an existing legal person, which keeps using its existing EIN or Social Security number. If you need an EIN at all, it is free from the IRS.

Can I open a bank account with a DBA? Yes, and that is the most common reason to file one. Banks generally want the filed certificate before accepting payments to the trading name.

Do DBAs expire? It depends on the state. California requires renewal every five years. New York assumed name certificates do not expire, though you must file an amendment if the facts change and a certificate of discontinuance when you stop using the name.

Can I have more than one DBA? Yes. One company can register several trading names, each with its own filing and fee.

Is a DBA the same as a trademark? No. A DBA is an administrative registration. A trademark is an enforceable intellectual property right. Filing the first gives you none of the second.

For the wider structure decision see LLC vs sole proprietorship and the provider comparison on our best LLC services chart, scored by the method in how we rank.

DBA rules, fees and publication requirements are set at state and county level and change without notice. Figures cited were current as of 18 August 2026. This content is not legal, financial or accounting advice.