DBA vs. Assumed Name: What Is the Difference?

Same Filing, Different Words

"DBA" and "assumed name" refer to the same underlying concept: a registration that lets a business operate publicly under a name different from its own legal name. "DBA" is short for "doing business as" and functions as an informal, widely understood umbrella term used across the country, in casual conversation, bank forms, and even some official guidance, like the SBA's own materials. "Assumed name" is one of several formal terms that individual states actually use in their statutes and on their official filing forms; it isn't a different kind of filing, just a different label some states chose for the same thing.

States That Formally Use "Assumed Name"

A number of states print "assumed name" directly on their statutes and forms. Texas requires an Assumed Name Certificate (Form 503), filed with the Texas Secretary of State. Illinois uses an Application to Adopt, Change, or Cancel an Assumed Name, filed with the Illinois Secretary of State. Tennessee's Application for Registration of Assumed Name (Form SS-4402) is filed with its Secretary of State's Division of Business and Charitable Organizations. Vermont calls its filing a Registration of Assumed Business Name, and Oregon uses Assumed Business Name registration as well. If you're filing in one of these states, "assumed name" is the exact term you'll see on the actual government form, not just informal shorthand.

Other Common Terms for the Same Thing

Other states use different formal labels for the identical concept: "trade name" (used by Arizona, Colorado, and Washington, among others), "fictitious name" or "fictitious business name" (used by California and Florida), and "certificate of assumed name" in a handful of states that blend the terms. A few states even use a different phrase for the exact same filing depending on the document: New York, for example, calls its own form a "Certificate of Assumed Name" while commonly referring to the underlying concept as a DBA in general guidance. None of these labels changes what the filing actually does: it's a public record that a specific legal owner, whether an individual, partnership, LLC, or corporation, is using a particular name.

Why the Terminology Varies So Much

There's no federal DBA law standardizing this; each state's own business statutes were written independently, often decades apart, which is why the exact word varies so much from state to state. This matters practically mainly when you're searching for your state's filing form or statute: searching only for "DBA" in a state that calls it an "assumed name" on its own site can sometimes miss the right form, especially on older government pages that use only the formal legal term.

The Process Still Depends on the State, Not the Label

Two states that both formally use "assumed name" can still have very different filing processes. Texas files its Assumed Name Certificate directly with the Secretary of State statewide (and, since a 2019 law change, no longer also requires a separate county filing for an LLC). Illinois, by contrast, uses an unusual proration system that prices an assumed name filing based on where the current year falls in a five-year cycle. The label tells you almost nothing about the fee, the agency, or the renewal schedule; you still need to check your specific state's current rules regardless of which term it uses.

Practical Takeaway When Researching Your State

When looking up your own state's requirements, search using both the generic "DBA" and your state's formal term, such as "assumed name," "trade name," or "fictitious name," since government search tools often index pages by the exact statutory phrase rather than the informal nickname. Starting from your Secretary of State's or county clerk's own business filings page, rather than a generic search engine, is usually the fastest way to find the right form under whatever name your state gives it.

Don't Assume Identical Terminology Means Identical Rules

Even within states that both use "assumed name," details like publication requirements, renewal terms, and whether the filing happens at the state or county level differ. Treat the term as a label for finding the right form, not as a shortcut past checking your own state's specific requirements.

Your Filed Document May Use Either Term Informally

Banks, vendors, and even some government agencies may refer to your filing as a "DBA" in conversation even if the certificate itself says "assumed name" or another formal term. This is normal and doesn't affect the filing's validity; what matters is that the business name on your contracts and licenses matches what's actually on the filed certificate.

Multi-State Businesses Should Track Terminology Per State

If your business operates in several states under the same name, you may be filing a "trade name" in one, an "assumed name" in another, and a "fictitious name" in a third, all for functionally the same purpose. Keep a record of what each state calls its filing alongside the filing details themselves, so you're not confused when renewal notices or forms use different language in each state.

Not Legal Advice

This article explains common terminology; it isn't a substitute for reading your specific state's statute or filing instructions. Confirm the exact current term, form, and process with your state's Secretary of State or county clerk before filing.