How Do File a DBA in Texas

Starting a business under a name that isn't your legal entity name is common, and Texas makes the process fairly straightforward once you know which office to approach. Whether you're a freelance photographer branding yourself as "Lone Star Lens Studio" or an LLC that wants a friendlier storefront name, the path runs through what Texas officially calls an assumed name certificate. Most people simply call it a DBA, short for "doing business as." Understanding how do you file a DBA in Texas comes down to three questions: what type of business entity you operate, which office accepts your filing, and how much the paperwork will cost you in fees and time.

This guide walks through every stage of Texas DBA filing, from figuring out where to submit your paperwork to avoiding the small mistakes that get certificates bounced back. By the end, you'll know exactly what Form 503 asks for, what county clerks expect from sole proprietors, and how long your assumed name stays valid before you need to renew it.

What a DBA Actually Means Under Texas Law

Texas law doesn't use the term "DBA" in its statutes. Instead, the Texas Business and Commerce Code refers to this filing as an assumed name certificate, and the two phrases describe the same thing. Filing one lets a business or an individual operate publicly under a trade name that differs from the name on file with the state or the name a sole proprietor uses personally. A florist named Maria Gonzalez, for example, might legally be a sole proprietor operating under her own name, yet market herself as "Austin Bloom Floral" on signage, invoices, and social media. Filing an assumed name certificate makes that branding legitimate in the eyes of banks, vendors, and local government.

It's worth being clear about what a DBA does not do. Registering an assumed name gives public notice that a particular person or entity is using a specific trade name. It does not create a new legal entity, and it does not shield your personal assets from business liability the way forming an LLC would. It also does not grant exclusive rights to the name, meaning someone else in another county, or even one county over, could legally register the same or a similar name. Business owners who want real name protection typically pair their DBA filing with a state or federal trademark search, since the assumed name system in Texas exists purely as a notice filing, not a naming monopoly.

Determine Where You Need to File Based on Entity Type

The single most important decision when filing a Texas DBA is figuring out which office actually processes your paperwork, because Texas splits jurisdiction by business structure rather than handling every filing through one statewide portal. Sole proprietors and general partnerships file directly with the county clerk in each county where they maintain a business office. If your business has no physical office in Texas, you file in every county where you conduct business under that name.

Registered entities work differently. LLCs, corporations, limited partnerships, limited liability partnerships, professional associations, and other formally organized filing entities submit Form 503 to the Texas Secretary of State rather than to a county clerk. Since House Bill 3609 took effect in September 2019, these entities no longer need to also file separately at the county level; a single state-level filing covers the entire state. This distinction trips up plenty of new business owners who assume every DBA in Texas goes through the same office, so confirming your entity type before you start the paperwork will save you a wasted trip or a rejected filing.

Filing Form 503 With the Texas Secretary of State

If you operate through an LLC, corporation, or other registered entity, your assumed name certificate is Form 503, and it must be filed with the Secretary of State's office rather than at the county level. The form asks for several specific pieces of information: the assumed name itself, the legal name of the entity exactly as it appears in Secretary of State records, the entity type, the SOS file number, the state or jurisdiction where the entity was originally formed, the principal office address, the counties where the assumed name will be used, and the duration of use, which cannot exceed ten years from the filing date.

Signing authority matters here more than people expect. Form 503 must be executed by someone authorized to act for the entity, such as a member or manager for an LLC, an officer for a corporation, a general partner for a partnership, or an attorney-in-fact who has written authorization to sign on the entity's behalf. Texas does not require an original handwritten signature for state-level filings; faxed copies and photocopies with reproduced signatures are accepted, which makes remote filing considerably easier than it used to be.

You have three ways to submit the completed form: online through the SOSDirect portal, by mail to the Secretary of State's office in Austin, or in person at the Austin office. The filing fee is $25, payable by personal check, money order, LegalEase debit card, or major credit card. Credit card payments carry a 2.7 percent convenience surcharge, so paying by check or money order is the cheaper route if you're filing by mail. Submit the form in duplicate, since the office returns one stamped copy to confirm your filing was accepted.

Filing With the County Clerk as a Sole Proprietor or Partnership

Sole proprietors and general partnerships skip the Secretary of State entirely and file directly with the county clerk in the county, or counties, where they operate. Most county clerk offices maintain their own version of an assumed name certificate form, and many now allow online submission alongside traditional in-person or mailed filings. Because Texas has 254 counties and each one sets its own fee schedule, the cost of filing varies more than it does at the state level. Expect to pay somewhere between roughly $14 and $25 for the base filing, with small additional charges per extra owner listed on the certificate and possible notarization fees if your county requires a notarized signature.

If your business operates out of more than one county, you generally need to file a separate assumed name certificate in each county where you maintain a business presence. This is one of the more overlooked requirements in Texas DBA filing, since business owners often register once in their home county and assume that filing covers the whole state. It doesn't. If you're a sole proprietor without a fixed office location, you file in every county where you actually conduct business under that name, which can add up in both paperwork and fees for owners who work across a wide service area.

Costs, Renewal Timelines, and Common Filing Mistakes

Total cost depends heavily on which office you're filing with and how many counties are involved. State-level Form 503 filings run a flat $25 no matter where in Texas the entity operates. County-level filings for sole proprietors and partnerships typically land between $14 and $25 per county, plus modest add-ons for notarization or extra business owners listed on the same certificate. Businesses that plan to operate under the same trade name in several counties should budget for multiple filing fees rather than assuming one payment covers the state.

Every Texas assumed name certificate carries a maximum term of ten years from the date it's filed, regardless of whether you filed with the county clerk or the Secretary of State. You're allowed to choose a shorter term, but most businesses select the full ten years to avoid repeat paperwork. If you continue using the name after the certificate expires, Texas requires you to file a brand-new certificate before the old one lapses; there's no formal renewal or amendment form, so a fresh filing is the only way to extend your rights to the name.

A handful of mistakes account for most rejected or delayed filings. Treating a DBA as if it were trademark protection is probably the most common misunderstanding, since the certificate only provides public notice and does nothing to stop a competitor from adopting a similar name elsewhere. Missing or incorrect signatures cause rejections too, particularly on Form 503, which must be signed by someone with actual authority to bind the entity. Business owners also sometimes forget that Texas has no amendment process for assumed names; if your entity's legal name, address, or ownership changes materially, you generally need to file a new certificate within 60 days rather than trying to update the old one. Finally, skipping a name availability search before filing can lead to confusion down the road, so running a quick check through the Secretary of State's SOSDirect system, and the county clerk's index if you're filing locally, is worth the extra few minutes.

After You File: Practical Next Steps

Once your assumed name certificate is approved, keep a copy with your core business records, since banks routinely ask for it before opening a business account under your trade name. You won't need a separate EIN for the DBA itself; the IRS assigns an EIN to your legal business entity, not to the assumed name, so your existing tax identification stays the same regardless of how many trade names you register. Many owners also use the newly filed certificate to update marketing materials, signage, contracts, and local licensing paperwork so everything matches the name now on public record.

If your business structure changes later, say you convert from a sole proprietorship to an LLC, plan your DBA filing around that transition rather than filing twice in quick succession. Since there's no amendment mechanism, timing a structural change to happen before or shortly after your assumed name filing can save you a second round of fees. For businesses that expect to grow into new counties, it's also worth checking whether registering with the Secretary of State makes more sense than filing separately in each new county, particularly once you've formed an LLC or corporation.

How much does it cost to file a DBA in Texas?

The cost depends on where you file. LLCs, corporations, and other registered entities pay a flat $25 to file Form 503 with the Texas Secretary of State, while sole proprietors and general partnerships pay a county-set fee, typically between $14 and $25, to their local county clerk. Additional charges may apply for notarization or extra business owners listed on the same certificate, so it's worth checking your specific county's fee schedule before filing.

Does filing a DBA in Texas protect my business name?

No. An assumed name certificate is strictly a notice filing that tells the public a business is operating under a particular trade name; it does not grant exclusive rights or trademark protection. Another business in a different county, or even one operating under a different entity type, could legally register a similar name. Owners who want stronger name protection typically pursue a state or federal trademark in addition to their DBA filing.

How long does a Texas assumed name certificate last?

A Texas DBA is valid for up to ten years from the date it's filed, whether you registered with the county clerk or the Secretary of State. There's no separate renewal form; if you want to keep using the name after the term ends, you simply file a new assumed name certificate before the current one expires, paying the same fee you paid originally.

Do I need a DBA if I already formed an LLC in Texas?

Yes, if you plan to operate under a name other than the one listed in your LLC's certificate of formation. Forming an LLC establishes your legal entity name, but it doesn't automatically register any trade name you want to use for marketing or branding. In that case, you'd file Form 503 with the Texas Secretary of State to legally register the assumed name your LLC intends to use.