Texas law says yes—if you want to use a business name different from your legal name, you must register a DBA (doing business as), also called an assumed name. This matters because operating without one breaks Texas law. According to Texas Business and Commerce Code, running your business under an assumed name without filing opens you to criminal penalties. Every year, thousands of Texas entrepreneurs face fines and legal trouble because they skip this step. You cannot even enforce contracts in court without a valid DBA registration.
What You’ll Learn in This Article
🎯 Whether Texas actually requires you to file a DBA and which businesses must follow the rule
🎯 How to tell if you need to file at the county level or with the Secretary of State (the biggest mistake business owners make)
🎯 Exactly what information you fill in on the form, what each line means, and why it matters
🎯 Real scenarios showing DBAs in action and what happens when you ignore the law
🎯 Common mistakes that cost business owners money and how to avoid them
Federal Law First: The National Picture
The federal government does not require DBA registration. Federal law lets states decide their own rules. Texas is stricter than many states—it requires registration while other states do not. The IRS focuses on employer identification numbers (EINs) for tax purposes, not on business names. Your federal tax ID number and your DBA are two separate things. Many business owners think getting an EIN covers them, but it does not.
When Texas Requires a DBA (The Core Rule)
You need a DBA if you run a business under any name other than your legal name. Your legal business name is the name on your formation documents with the state or, for solo owners, your personal name.
Example 1: Sarah works as a hairdresser using only her first and last name—Sarah Martinez. She does not need a DBA because she operates under her legal name.
Example 2: Sarah wants customers to call her business “Hair by Martinez.” That is not her legal name, so she must file a DBA.
Example 3: A group of friends forms an LLC called “Martinez Holdings, LLC” with the Secretary of State. They want to run a salon under the name “Downtown Hair Studio.” They must file a DBA because “Downtown Hair Studio” is different from their legal entity name.
The rule applies to every type of business structure. You cannot skip it if you own a sole proprietorship, partnership, LLC, corporation, or limited partnership.
The Critical Split: Where You File Depends on Your Business Type
This is where most owners get confused. Texas splits DBA filing into two completely different systems based on what type of business you own. Filing in the wrong place wastes time and money.
| Type of Business | Where to File | Cost |
|---|---|---|
| Sole proprietorship (you alone) | County clerk in your county | $20–$25 |
| General partnership (partners, no formal LLC/Corp) | County clerk in your county | $20–$25 |
| LLC, Corporation, Limited Partnership, LLP | Secretary of State (state level) | $25 |
Why the split? Sole proprietorships and general partnerships have no formal registration with the state. They exist the moment you start doing business. The county clerk handles their paperwork. LLCs, corporations, and partnerships with “limited” in the name are formally registered with the state. They already have state-level files, so their DBAs go there.
This rule changed in 2019. Before then, even LLCs filed at both the state and county level. Now they file only at the state level. If someone tells you to file at the county, they are giving you outdated advice.
Sole Proprietors and General Partnerships File at the County
If you work alone or with partners but never formed an LLC or corporation, you file with your county clerk. You file in the county where you keep your business office. If you have no office and work in multiple counties, you file in each county where you do business.
Example: Mike runs a lawn care business from his garage in Dallas. He hires two friends as partners (no formal partnership agreement filed with the state). They want to call themselves “Green Thumb Crew.” Mike files the DBA with the Dallas County Clerk.
Example: Jenny works as a freelance consultant and has no office. She travels around Texas taking clients in Houston, San Antonio, and Austin. She wants to file a DBA called “Jenny’s Business Solutions.” She must file in Harris County (Houston), Bexar County (San Antonio), and Travis County (Austin).
The fee varies by county. Dallas County charges $23 plus $0.50 for each additional owner. Harris County charges $17 plus $0.50 per extra owner. Tarrant County charges $23.50 plus $0.50 per owner. Call your county clerk’s office to confirm the exact fee.
LLCs, Corporations, and Limited Partnerships File at the State Level
If you formed an LLC, corporation, limited partnership, or limited liability partnership with the Secretary of State, your DBA goes to the state, not the county. You file Form 503 (Assumed Name Certificate) with the Texas Secretary of State. The state fee is always $25.
Example: Carlos forms an LLC called “Carlos Tech Services, LLC” with the Texas Secretary of State. He wants to launch a side brand called “Quick IT Fixes.” He files Form 503 with the Secretary of State, not his county.
Example: Three friends form a limited partnership called “Parker & Friends General Partners” to run a consulting firm. They want a DBA called “Smart Moves Consulting.” They file at the state level, not the county.
When you file at the state level, you note which county or counties you will do business in on your form. You can say “all counties” or list specific ones. This tells the state where your business operates, but the filing itself stays at the state level only.
Breaking Down Form 503 (For State-Level Filers)
If you are an LLC, corporation, or limited partnership, you fill out Form 503 to register your DBA. Understanding each line prevents rejections and delays.
Line 1: The Assumed Name
Write the exact name you want to use. This cannot be identical to your legal business name. If your LLC is called “TechStart Holdings, LLC,” you cannot file “TechStart Holdings, LLC” as a DBA. It must be different.
Why this matters: The law says a DBA must be a different name from your legal name. Filing the same name gets rejected. You waste time and money refiling.
The name must also be distinguishable from other businesses on file with the Secretary of State. You can search the Texas Secretary of State database to check if someone already uses it. Search before you fill out the form. If another business uses your desired name, pick something different. The Secretary of State does not protect names from conflict—that is your job.
Scenario: You want to file “Austin Tech Solutions” as a DBA. You search and find “Austin Technology Solutions” already filed. These names are too similar. Pick “Austin Software Solutions” instead.
Line 2: Legal Name of the Entity
Write your business’s legal name exactly as it appears in your formation documents or Secretary of State records. Match punctuation, capitalization, and spacing perfectly. A mismatch causes rejection.
Example: Your LLC formation documents say “MartinezWorks, LLC” (no space). If you write “Martinez Works, LLC” (with a space) on Form 503, the Secretary of State rejects it.
Line 3: Entity Type
Check the correct box: For-profit Corporation, Nonprofit Corporation, Professional Corporation, Professional Association, LLC, Limited Partnership, or Other. Pick only one.
Line 4: File Number
If your business has a file number from the Secretary of State, write it here. You get this number when you first registered your LLC or corporation with the state. Check your formation confirmation email or your business’s file folder with the Secretary of State.
Line 5: State, Country, or Jurisdiction of Formation
Where was your business legally created? If you formed your LLC in Texas, write “Texas.” If you formed it in Delaware or another state, write that state’s name.
Why this matters: Foreign entities doing business in Texas must also file DBAs. This line tells the state where you really come from.
Line 6: Principal Office Address
Write the street address or mailing address where your business office sits. You can use either, but if they differ, list both. The Secretary of State needs a way to contact you.
Line 7: Period of Duration
Pick one option:
- 10 years from the date of filing (most common)
- Fewer than 10 years (if you only plan to use the name temporarily)
- Until a specific date (if you know when you will stop using the name)
A DBA lasts up to 10 years. After that, you must refile to keep using it. There is no “lifetime” option.
Why this matters: If you pick a shorter period and forget to renew, you lose your legal right to use that name. Competitors can then file it.
Line 8: County or Counties Where You Will Do Business
Check one box:
- All counties (if you do business statewide)
- All counties except (if you exclude certain counties)
- Only the following counties (if you list specific ones)
This tells the state your business footprint. If you plan to expand into new counties later, you must file a new certificate or amend this one. Here is the practical truth: Many owners check “all counties” even if they only operate in one place. They do this to avoid coming back to file again if they grow. The state allows it. Checking “all counties” does not cost more.
Example: You run an LLC in Dallas but plan to open a second location in Houston next year. Check “all counties” and skip a second filing later.
Line 9: Execution (Signature Line)
An authorized person must sign. This means an owner, member, manager, or officer of the business. If you own the LLC, you sign. You can also have an attorney in fact (someone with legal authority on paper) sign, but you must include a statement saying they have written permission.
You sign under penalty of perjury. This means you swear everything is true. Lying on this form is a crime.
State and County Filing: The Same Form, Different Process
Sole proprietors and general partnerships get a similar form from their county clerk. The information is the same, but the filing location is different.
For county filings, you typically must appear in person or have a notary sign. If you file by mail, the form must be notarized. At the state level, notarization is not required—you just sign and send it in.
County filing example (Dallas County):
- You walk into the Dallas County Clerk’s office.
- Bring a valid government-issued ID (driver’s license, passport, military ID).
- All business owners must be present and sign.
- Pay the fee ($23 plus $0.50 per owner).
- The clerk processes it immediately or within a few days.
State filing example (Form 503):
- You download Form 503 from the Secretary of State website.
- Fill it out, sign it, and mail it with a $25 check to the Secretary of State in Austin.
- Or file online through SOSDirect (faster—usually 1–2 business days).
- No notarization needed.
Three Popular DBA Scenarios in Real Life
Scenario 1: Solo Business Owner with a Brand Name
The Situation:
Jessica is a massage therapist in Austin. She wants to call her business “Zen Haven Massage,” but her personal name is Jessica Park. She formed no LLC or corporation. She is a sole proprietor.
What Jessica Must Do:
Jessica is a sole proprietor (just herself, no formal business registration). She must file with the Travis County Clerk (Austin is in Travis County). She fills out the assumed name form with:
- Assumed name: “Zen Haven Massage”
- Legal name: “Jessica Park”
- County: Travis County
- Fee: Approximately $23–$25
What Happens If Jessica Ignores This:
Jessica operates anyway, calling herself “Zen Haven Massage.” A customer gets injured during a massage and sues. Jessica wants to enforce her business contract with the customer in court. The judge says, “You never filed a DBA. Your business is not officially recognized.” Jessica cannot enforce the contract and loses the case. Plus, she faces a Class A misdemeanor charge (a criminal offense).
| Action | Consequence |
|---|---|
| Jessica files the DBA correctly | Her business name is protected and recognized by Texas. She can enforce contracts. No penalties. |
| Jessica operates without filing | Her contracts are not enforceable in court. She faces criminal charges and civil penalties. The judge can make her pay the other side’s legal fees. |
Scenario 2: LLC with Multiple Brand Names
The Situation:
Three friends form “Martinez Media Holdings, LLC” with the Texas Secretary of State. They run a digital marketing agency. They want to use three different brand names for different client industries:
- “Corporate Boost” (for big companies)
- “Small Biz Digital” (for small businesses)
- “Local Hero Marketing” (for local service businesses)
What They Must Do:
They form one LLC called “Martinez Media Holdings, LLC.” They then file three separate DBAs with the Secretary of State:
- Form 503 for “Corporate Boost” ($25)
- Form 503 for “Small Biz Digital” ($25)
- Form 503 for “Local Hero Marketing” ($25)
Total cost: $75 (plus the original LLC formation fee, already paid)
Each DBA is valid for 10 years. When the DBAs expire, they refile them (another $25 each).
Contracts must use both names:
When “Corporate Boost” signs a client contract, the signature line should read: “Martinez Media Holdings, LLC, DBA Corporate Boost”
| Action | Consequence |
|---|---|
| They file all three DBAs | Each brand operates legally. Clients know which brand they hired. No legal issues. |
| They file zero DBAs and just use the names | Operating under assumed names without filing violates Texas law. They face criminal charges. Contracts cannot be enforced in court. Banks may refuse to open accounts under these names. |
Scenario 3: Multi-County Sole Proprietorship
The Situation:
Tom is an independent bookkeeper with no business partner and no LLC. He works from home in Houston (Harris County). He also does jobs in San Antonio (Bexar County) and one client in Austin (Travis County). He wants to call himself “Tom’s Tax & Bookkeeping.”
What Tom Must Do:
Tom must file a DBA in Harris County (Houston), Bexar County (San Antonio), and Travis County (Austin). He needs three separate filings, one for each county. Each filing costs approximately $20–$25.
Why three filings?
Sole proprietors and general partnerships file at the county level. Tom has no principal office in any one county—he works across three. State law says he must file in each county where he conducts business. Three counties = three filings.
Cost breakdown:
- Harris County DBA filing: $17
- Bexar County DBA filing: $23
- Travis County DBA filing: $23–$25
- Total: approximately $63–$65
Mistake Tom could make:
Tom thinks, “I’ll just file in Houston and it covers all of Texas.” Wrong. He is only legally protected in Harris County. If he signs a contract in San Antonio under “Tom’s Tax & Bookkeeping” and something goes wrong, San Antonio courts may not recognize the DBA because he never filed in Bexar County.
| Action | Consequence |
|---|---|
| Tom files in all three counties | His DBA is legal in all three counties. He can enforce contracts and operate without penalty. |
| Tom files only in Houston | His DBA is recognized only in Harris County. Operations in other counties violate the law. He cannot enforce contracts in San Antonio or Austin courts. Criminal penalties apply. |
The Form 503 Mistakes That Cost Money
Mistake 1: Using Your Legal Name as the Assumed Name
What happens: You submit Form 503 with your legal entity name as the “assumed name.” The Secretary of State rejects it. By definition, an assumed name must differ from your legal name.
Example: Your LLC is called “TechStart LLC.” You try to file “TechStart LLC” as a DBA. Rejected. You must use something like “TechStart Solutions” or “TechStart Digital.”
Cost: $25 wasted on the rejected filing. You refile and pay another $25. Total: $50 for one DBA.
Mistake 2: Name Matching Errors (Punctuation, Spacing, Capitalization)
What happens: You write your LLC name on Form 503 with a different punctuation or spelling than the state has on file. The Secretary of State rejects it for not matching their records.
Example: Your LLC formation documents say “Jones & Associates, LLC” (with an ampersand). You write “Jones and Associates, LLC” (spelled out). Rejected.
Prevention: Pull your official Secretary of State record. Copy the name exactly, character for character.
Mistake 3: Not Searching for Name Conflicts
What happens: You file a DBA name, and the Secretary of State says it is “indistinguishable” from an existing name on file. Your filing is rejected.
Example: You file “Austin Tech Consulting” but “Austin Tech Solutions” already exists. Too similar. Rejected.
How to prevent: Search the Secretary of State database before filling out Form 503. If you are at the county level, search your county clerk’s records.
Mistake 4: Signing as an Unauthorized Person
What happens: You fill out Form 503, but someone without authority signs it (like a bookkeeper with no manager role). The form is rejected or, worse, treated as fraudulent.
Example: You hire an accountant to handle your paperwork. The accountant signs Form 503 without your written permission. The Secretary of State questions the filing.
Prevention: Only someone with actual authority signs—an owner, manager, officer, or someone with written attorney-in-fact power.
Mistake 5: Filing at the Wrong Level
What happens: You own an LLC but file your DBA with your county clerk instead of the Secretary of State. Your filing is either rejected or unrecognized when you need it.
Example: You form an LLC and file its DBA in Travis County, thinking it covers Texas. You later move to another county. The DBA is only valid in Travis County. You must file again elsewhere.
Prevention: Know your business type. If you formed an LLC or corporation, file at the state level always.
Mistake 6: Not Renewing Before Expiration
What happens: Your DBA is valid for 10 years. You forget to renew. On day 3,651, your DBA expires. You lose your right to operate under that name. Someone else files it. You lose your brand.
Example: You file a DBA on January 1, 2025. It expires January 1, 2035. You forget. On January 2, 2035, a competitor files “YourBrand LLC” as their own DBA. You can no longer use it without legal battle.
Prevention: Calendar a renewal reminder at the nine-year mark (six months before expiration). Refile before the deadline.
Do’s and Don’ts for DBA Success
| Do | Why |
|---|---|
| Search your state and county databases before filing | Name conflicts cause rejections and delays. Searching takes five minutes and saves $25 and two weeks. |
| Match your legal name exactly on the form to your Secretary of State records | Mismatches cause immediate rejection. Exact matches process faster. |
| File in the correct location (state vs. county) based on your business type | Filing in the wrong place wastes money and leaves you unprotected legally. |
| Use “all counties” if you plan to expand | Changing counties later requires a new filing and another fee. Use “all counties” once and avoid the hassle. |
| Sign the form yourself or with written attorney-in-fact permission | Unauthorized signatures trigger fraud questions and rejections. |
| Renew your DBA before it expires | Expiration means you lose your name. Renewal is cheap; fighting for your brand is expensive. |
| Don’t | Why |
|---|---|
| Don’t assume your EIN counts as DBA registration | An EIN is a federal tax number. A DBA is a state/county name registration. They are separate. Not filing a DBA violates Texas law even with an EIN. |
| Don’t use your legal name as the assumed name | A DBA by definition must differ from your legal name. The form will be rejected. |
| Don’t file a DBA in only one county if you operate in multiple counties | Each county where you do business requires its own filing (for sole props/partnerships). Skipping counties leaves you unprotected in those areas. |
| Don’t assume trademark registration covers a DBA | A trademark is federal or state intellectual property protection. A DBA is a state/county registration. You need both if you want full protection. |
| Don’t ignore name availability searches | Filing a conflicting name wastes your fee and delays your registration by weeks. A 10-minute search saves money and time. |
| Don’t skip renewal notices or reminders | Your DBA is useless after expiration. Anyone can then file your name. Calendar your renewal date. |
Pros and Cons of Filing a DBA in Texas
| Pro | Why It Matters |
|---|---|
| Your business name is legally recognized and protected in Texas courts | You can enforce contracts, sue others, and be sued under your DBA name. Without it, courts may reject your claims. |
| You can open a business bank account and establish business credit under the DBA | Banks require a DBA or business license to open accounts. Your DBA proves you own the name. |
| Multiple DBAs under one LLC allow you to run different brands without forming new companies | You save LLC formation fees ($200+). One LLC, three DBAs, and three brand identities. Efficient and cheap. |
| The filing fee is low ($20–$25) and takes just days to process | Cost is minimal. State filing takes 1–2 business days online. County filing is often same-day. |
| You avoid criminal and civil penalties that come with not filing | Class A misdemeanor charges, fines, and court fees are expensive and embarrassing. A $25 filing prevents all of that. |
| You demonstrate professionalism to clients and lenders | A registered business name looks legitimate. Clients and banks trust registered businesses more than unregistered ones. |
| Con | Why It Matters |
|---|---|
| A DBA does not give you trademark protection | Others can still use your name. You need a separate trademark registration for exclusive national rights. |
| A DBA lasts only 10 years—you must renew and pay again | If you forget, you lose your name. Set a calendar reminder to avoid this. |
| Multiple DBAs under one business require multiple filings and fees | If you want three brands, you pay $75 (three $25 filings) at the state level or $60–$75 at the county level. |
| County-level filing requires you to appear in person or get a notary (extra cost) | Notarization fees are $5–$10. You also must coordinate with owners if multiple people are involved. |
| Filing in multiple counties multiplies your cost | Operating in three counties as a sole proprietor means three filings and three fees. Budget $60–$75. |
| A DBA does not prevent others from using your name in different industries or states | Someone can file your DBA name in another state. They can also use your name for a different type of business in Texas. |
Texas Penalties for Not Filing a DBA (The Cost of Ignoring the Law)
Failing to file a DBA is a Class A misdemeanor under Texas Business and Commerce Code § 71.202. This means criminal charges, not just a fine.
Civil Penalties (Money)
If someone sues you and you operated under an assumed name without filing:
- You cannot enforce the contract in court.
- The court awards the other side their attorney’s fees and court costs.
- If your legal fees to argue your case are $5,000, you pay their $5,000 too. Total: $10,000 out of pocket.
You also cannot sue someone else using your unfiled DBA. Imagine a customer owes you $10,000 for services under your unregistered business name. You try to sue. The judge throws out your case because you never filed. You lose $10,000 and cannot recover it.
Criminal Penalties (Legal Trouble)
Operating under an assumed name without filing is a Class A misdemeanor. Penalties include:
- Up to one year in county jail
- Fines up to $4,000
- A criminal record that affects future jobs, loans, and housing
Penalties for Fraudulent Filings
If you file a DBA with false information, Texas Business and Commerce Code § 71.203 says you committed fraud. This is more serious than a misdemeanor. Penalties mirror felony charges under Texas Penal Code § 37.10 (forgery and falsification). Jail time is longer, fines are higher, and the criminal record is worse.
How to File Your DBA: Step by Step
For State-Level Filers (LLC, Corporation, Limited Partnership)
Step 1: Confirm Your Business Type
Check your Secretary of State file to confirm your entity is registered. If you formed an LLC, corporation, or limited partnership, you file at the state level.
Step 2: Search for Name Availability
Go to the Texas Secretary of State name database. Search your desired DBA name. Check if it is already in use. If it is available, proceed. If not, pick a different name and search again.
Step 3: Download Form 503
Get Form 503 from the Secretary of State website. Print it or fill it out on your computer, then print it.
Step 4: Fill Out Every Line
- Line 1: Assumed name (the DBA you want to use)
- Line 2: Legal name of your entity (from your Secretary of State file)
- Line 3: Entity type (LLC, corporation, limited partnership, etc.)
- Line 4: File number (from your Secretary of State file)
- Line 5: State of formation (Texas or another state)
- Line 6: Principal office address
- Line 7: Duration (10 years is standard)
- Line 8: Counties (all counties is common)
- Line 9: Sign and date
Step 5: Submit Your Form
Option A (Fastest): File online through SOSDirect. Processing takes 1–2 business days. You pay $25 plus a small online convenience fee (about 2.7%). This is the fastest method.
Option B (Standard Mail): Mail Form 503 with a $25 check to:
Secretary of State
P.O. Box 13697
Austin, TX 78711-3697
Processing takes 7–10 business days.
Option C (Fax): Send Form 503 to (512) 463-5709 with Form 807 (Credit Card Authorization). You pay $25 plus a 2.7% convenience fee. Processing takes 7–10 business days but may be faster than mail.
Step 6: Wait for Confirmation
The Secretary of State sends you a confirmation (usually by mail or email through SOSDirect). Keep this for your records. It proves your DBA is registered.
For County-Level Filers (Sole Proprietor, General Partnership)
Step 1: Find Your County Clerk’s Office
Search “[Your County] Texas County Clerk Assumed Name” online. Find their office address and contact information.
Step 2: Check Filing Requirements
Call or visit their website. County requirements vary. Some let you file online and pick up in person. Some require notarization by mail. Some require you to appear in person.
Step 3: Search Existing Names
Some counties let you search online. Others require an in-person search at the clerk’s office. Search your desired DBA name. If it is available, proceed.
Step 4: Get the Form
The county clerk provides a form. It is often similar to Form 503 (the state form) but county-specific. Download it from their website or pick one up in person.
Step 5: Fill Out the Form
Include:
- Assumed name
- Legal names of all owners
- Business address
- Duration (10 years is standard)
- County where you do business
- Signatures of all owners (witnessed by the clerk or notarized)
Step 6: Submit and Pay
- In person: Bring all owners, valid IDs, and the completed form. The clerk witnesses signatures. Pay the fee (typically $20–$25) and get your certificate immediately or within a few days.
- By mail: Include a notarized form, a self-addressed stamped envelope, and a check for the fee. Mail to the county clerk. Processing takes 2–3 weeks.
Step 7: Keep Your Certificate
The clerk gives you an official certificate. This proves your DBA is registered. Keep it forever. You need it to renew in 10 years.
Form 503 Line-Item Breakdown with Nuances
Each field on Form 503 has hidden meanings and consequences. Filling it out carelessly causes rejections.
Item 1: The Assumed Name
Field: “The assumed name under which the business or professional service is, or is to be, conducted or rendered is:”
What to write: Your desired DBA name.
Nuances:
- Cannot match your legal name. If your legal name is “Jones Tech, LLC,” you cannot file “Jones Tech, LLC” as a DBA. Pick “Jones Technology” or “Tech by Jones.”
- Must be distinguishable from existing names. “Austin Tech Consulting” conflicts with “Austin Consulting Technology” if registered. The Secretary of State checks for similarities.
- Cannot falsely imply government affiliation. You cannot file “Texas Department of Technology” or “City of Austin Services” (unless you are a government agency).
- Cannot use restricted words without proof. Words like “bank,” “insurance,” and “CPA” require special licensing or proof. Do not use them unless licensed.
Example of a problem name: You want “Medicare Billing Services” but you are not a Medicare provider. The form gets rejected for falsely implying government affiliation and licensing.
Item 2: Legal Name of the Entity
Field: “The legal name of the entity filing the assumed name is:”
What to write: Your business’s official registered name.
Nuances:
- Must match your Secretary of State file exactly. Spelling, capitalization, punctuation, and spacing must be identical. If your LLC file says “SmartStart Holdings, LLC” (no space), write exactly that—not “Smart Start Holdings, LLC.”
- Check your formation documents or Secretary of State file before writing. Do not rely on memory.
Example of a problem: Your LLC was formed as “Garcia Media LLC” (no comma before LLC). You write “Garcia Media, LLC” (with a comma). Rejected for mismatch.
Item 3: Entity Type
Field: Select one entity type from the checkboxes.
Nuances:
- Pick only one. Checking two boxes confuses the Secretary of State and can cause rejection.
- Professional entities have special rules. If you are a law firm (professional corporation), check “Professional Corporation,” not “For-profit Corporation.”
- If none fit, check “Other” and explain. If you have a rare entity type not listed, use “Other.”
Item 4: File Number
Field: “The file number, if any, issued to the entity by the secretary of state is:”
Nuances:
- This is optional if you do not have one. Leave it blank if unsure.
- Finding your file number: Log into your Secretary of State account or call (512) 475-2755. They tell you your file number in seconds.
- Why it matters: Including your file number speeds up processing. The Secretary of State confirms who you are faster.
Item 5: State of Formation
Field: “The state, country, or other jurisdiction of formation of the entity is:”
Nuances:
- Write “Texas” if formed in Texas. If your LLC was formed in Texas, write “Texas.”
- Write the state name if formed out of state. If your LLC was formed in Delaware but you do business in Texas, write “Delaware.”
- Foreign corporations need this. A company from Canada operating in Texas writes “Canada.”
Item 6: Principal Office Address
Field: “The entity’s principal office address is: [Street or Mailing Address], [City], [State]”
Nuances:
- You can use a street address or mailing address. A P.O. box is a mailing address. A business location is a street address. Either works.
- If they differ, list both. If your mailing address is a P.O. box in Austin but your office is in Dallas, you can list both.
- Must be in the U.S. (or your country of formation). If your LLC is formed in Texas, your address must be in the U.S. If formed in Canada, your address can be in Canada.
Item 7: Duration
Field: Choose one of three options:
- 7a: 10 years from filing date
- 7b: Fewer than 10 years
- 7c: Until a specific date
Nuances:
- 10 years is standard. Most businesses pick 7a. You can refile anytime before expiration.
- Pick 7b if you know you will stop using the name. Example: You plan to operate the DBA for only three years while testing a brand. Check 7b and write “3.”
- Pick 7c if you have an exact end date. Example: You license a brand name for a specific event. It ends December 31, 2027. Check 7c and write that date.
Why this matters: After expiration, your DBA dies. You lose the right to use the name. Anyone can then file it.
Item 8: Counties
Field: Check one option:
- All counties
- All counties with the exception of:
- Only the following counties:
Nuances:
- Checking “all counties” is safe and costs the same. Even if you operate in one county now, check “all counties.” If you expand later, you do not need to refile.
- You can list exceptions. If you do not want to do business in a specific county (for competitive reasons), you can exclude it.
- County-level restrictions do not apply at the state level. If you file with the Secretary of State, you are protected statewide. The county field just tells the state where you plan to operate.
Example: You operate in Austin but plan to expand to Houston and Dallas. Check “all counties” to cover future growth.
The DBA Versus LLC Versus Trademark: What You Actually Need
These three concepts confuse almost every new business owner. They are completely different.
| Concept | What It Is | What It Does | Where You File | Cost | Lasts How Long |
|---|---|---|---|---|---|
| DBA | An assumed business name | Lets you operate under a name different from your legal name | Secretary of State (state filers) or County Clerk (county filers) | $20–$25 | 10 years |
| LLC | A formal legal business structure | Protects your personal assets from business lawsuits and debt | Secretary of State | $150–$300 | As long as you file annual reports |
| Trademark | Intellectual property protection for a name or logo | Prevents others from using your exact name nationwide (federal) or statewide (state) | U.S. Patent & Trademark Office (federal) or Secretary of State (state) | $250–$400 (federal); $50–$100 (state) | 10 years (must renew) |
Example of all three:
You start a fitness coaching business. You form an LLC called “FitLife Holdings, LLC” ($200 filing fee). You file a DBA called “Personal Training by Sarah” ($25 filing fee). You register a federal trademark for “Personal Training by Sarah” with a unique logo ($300 filing fee).
- The LLC protects you if a client sues for injury.
- The DBA lets you operate under the name and sign contracts.
- The trademark prevents competitors from calling themselves “Personal Training by Sarah.”
You need all three for full protection, but the DBA is the minimum requirement by law. The LLC is optional but highly recommended. The trademark is optional unless you plan a national brand.
Searching for DBA Availability: How to Do It Right
Before you file, search to make sure your desired name is available.
State-Level Search
Go to the Texas Secretary of State name database. Type your desired DBA name. The search shows all businesses with that name or similar names on file at the state level.
What the search shows:
- Existing corporations and LLCs
- Existing DBAs filed at the state level
- Name reservations
What the search does NOT show:
- County-level DBAs (those are in county clerk files)
- Trademarks (search the USPTO database separately)
Red flags in search results:
- Exact match (same name already filed): Pick a different name.
- Similar name in the same industry: You risk trademark conflict. Consider a different name.
- Similar name in a different industry: Lower risk, but still verify with a lawyer.
County-Level Search
If you are filing at the county level, search your county clerk’s records. Most counties now have online search portals on their websites. Search for your desired DBA name in that county.
Example: You are a Dallas sole proprietor filing a DBA. Go to the Dallas County Clerk website, find the assumed name search tool, and search your name.
If your county has no online search:
Call or visit the county clerk’s office in person. They search for you (usually free). You can also pay a small fee ($5–$10) for them to mail you a search result.
Renewing Your DBA Before It Expires
Your DBA lasts 10 years from the filing date. You must renew before expiration or lose the name.
How to Renew
Renewal is easy: you refile. There is no separate “renewal form.” You use the same form (Form 503 for state filers; your county form for county filers) and pay the same fee.
Step 1: Calendar a reminder 6 months before expiration.
Step 2: Check your original DBA certificate. It shows the expiration date. (Example: Filed January 15, 2025 = expires January 15, 2035.)
Step 3: Before expiration, fill out a new Form 503 (or county form) with the same information. Make sure the legal name matches your current Secretary of State file exactly.
Step 4: Submit the new form and pay the fee ($25 state; $20–$25 county).
Step 5: The Secretary of State or county clerk processes your renewal. You get a new certificate good for another 10 years.
Important: There is overlap allowed. You can refile up to 6 months before expiration. The new DBA takes effect upon filing, not on the old one’s expiration date. This means you have a grace period.
What Happens If You Miss the Deadline
If your DBA expires and you do not renew:
- You lose your legal right to use the name.
- Anyone can file the same name as a new DBA.
- You cannot enforce contracts using the expired name.
- You may face penalties for operating without a valid registration.
Prevention: Set a phone reminder, calendar alert, and ask your accountant to remind you. The $25 renewal is cheap compared to losing your brand.
Banking and Tax IDs: How Your DBA Connects
A DBA is separate from your tax ID number (EIN), but they work together.
Opening a Bank Account with a DBA
Banks require documentation to open a business account. They need:
- Your EIN (Employer Identification Number) from the IRS
- Your DBA registration certificate (proof you filed with the Secretary of State or county)
- Business license (if required in your city)
- Your personal ID
The DBA certificate proves to the bank that you own the name. Without it, they may not open the account.
Example: Sarah wants to open a bank account under her DBA “Zen Haven Massage.” She brings her DBA certificate from Travis County, her EIN, and her driver’s license. The bank opens the account in the name “Sarah Park, DBA Zen Haven Massage.” She can now deposit client payments and pay business expenses.
Tax ID Requirements
- Sole proprietors and partnerships can use their personal Social Security number (SSN) or get an EIN from the IRS (free).
- LLCs and corporations must get an EIN from the IRS (free). Apply online at the IRS website.
The EIN is separate from your DBA. You need both:
- EIN: Identifies your business to the IRS for taxes.
- DBA: Identifies your assumed name to Texas for business registration.
Key Entities and Agencies Involved
Texas Secretary of State: Handles DBA registrations for LLCs, corporations, limited partnerships, and other formal business entities. Website: www.sos.state.tx.us
County Clerks: Handle DBA registrations for sole proprietors and general partnerships at the county level. Every Texas county has one.
Internal Revenue Service (IRS): Issues EINs (Employer Identification Numbers) for federal tax purposes. Separate from DBA registration but required for business banking.
U.S. Patent & Trademark Office (USPTO): Registers federal trademarks for brand names and logos. Provides nationwide trademark protection.
Texas Business & Commerce Code Chapter 71: The law that governs DBAs in Texas. View it on the Texas Legislature Online website.
Common Mistakes and How to Avoid Them
Mistake: Filing at the Wrong Level
Problem: You own an LLC but file your DBA at the county clerk. It gets rejected or is not recognized when you need it.
Solution: Know your business type. LLCs, corporations, and limited partnerships file with the Secretary of State. Sole proprietors and general partnerships file with their county clerk.
Check: Look at your formation documents. If it says “Certificate of Formation for LLC,” you formed an LLC and file at the state level.
Mistake: Not Searching Before Filing
Problem: You file a DBA that conflicts with an existing one. Your filing is rejected. You waste $25 and two weeks.
Solution: Search the Secretary of State database (state filers) or your county clerk’s database (county filers) before you fill out the form. Takes five minutes.
Mistake: Assuming Your EIN Counts as a DBA
Problem: You get an EIN from the IRS and think you do not need to file a DBA. You operate under an assumed name. You violate Texas law.
Solution: An EIN is a federal tax number. A DBA is a state/county business registration. Both are required if you operate under an assumed name. Filing one does not substitute for the other.
Mistake: Using an Expired DBA
Problem: Your DBA expires. You forget to renew. You operate with an expired registration. You face penalties.
Solution: Calendar your renewal date six months before expiration. Renewal costs the same as the original filing ($25 state; $20–$25 county). Refile before the deadline.
Mistake: Not Signing the Form Properly
Problem: Someone without authority signs the form. It is rejected for fraud or unauthorized signature.
Solution: Only an owner, manager, officer, or attorney-in-fact (with written permission) can sign. Do not let an employee or accountant sign unless they have written authority.
Mistake: Listing the Wrong Legal Name
Problem: Your LLC formation documents say “MartinezWorks, LLC” (no space). You write “Martinez Works, LLC” (with a space) on the form. Rejected for name mismatch.
Solution: Check your Secretary of State file or formation documents before filling out the form. Copy the legal name exactly, including punctuation, spacing, and capitalization.
Mistake: Not Noting All Counties Where You Operate
Problem: You operate in multiple counties but file in only one. You operate illegally in the other counties.
Solution: County-level filers must file in every county where they do business. State-level filers check “all counties” or list the specific counties on Form 503.
Frequently Asked Questions About Texas DBAs
Do I need a DBA if I am the only owner of my business and have no employees?
Yes. If you use any name other than your legal name, you must file a DBA. Company size and number of employees do not matter. Solo consultants, freelancers, and one-person shops need DBAs if they operate under an assumed name.
Can I file a DBA under my personal name?
No. A DBA must be different from your legal name. If your legal name is John Smith, you cannot file “John Smith” as a DBA. File something like “Smith Services” or “John’s Consulting” instead.
Do I need an LLC if I file a DBA?
No. A DBA and an LLC are separate. You can file a DBA as a sole proprietor with no LLC. However, an LLC offers liability protection that a DBA does not. Consider forming an LLC if you want to protect your personal assets.
How long does it take to process my DBA filing?
State-level: 1–2 business days online; 7–10 business days by mail. County-level: Same-day to a few days, depending on your county.
Can I change my DBA after I file it?
No. There is no amendment process. If you want a different name, you file a new DBA (pay another $25) and optionally file an abandonment for the old one. Keep both on file until you are sure you want to drop the old name.
What if someone else files the same DBA name I want?
They have the legal right to use it. A DBA does not prevent others from using your name. To prevent others from using your name, register a trademark with the USPTO (federal) or Texas (state). A DBA is a registration of intent, not a trademark.
Can I operate a business in Texas without filing a DBA?
Only if you use your legal name exactly. If your legal name is Sarah Jones and you run “Sarah Jones Consulting,” no DBA is needed. If you call it anything else, you must file a DBA. Operating under an assumed name without filing violates Texas Business and Commerce Code § 71.202 and is a Class A misdemeanor.
Do I need a DBA if my business is registered as an LLC with the Secretary of State?
Only if you operate under a name different from your LLC’s legal name. If your LLC is “SmartStart Holdings, LLC” and you operate under that exact name, no DBA is needed. If you want to call yourself “TechStart Services,” you file a DBA in addition to your LLC formation.
Can I file multiple DBAs under one LLC?
Yes. An LLC can register as many DBAs as you want. Each DBA costs $25 and requires its own Form 503 filing. Many businesses use multiple DBAs to operate different brand names under one LLC.
What is a trademark, and do I need one if I file a DBA?
A trademark is intellectual property protection that prevents others from using your name nationally (federal) or statewide (state). A DBA is a state/county registration. A DBA does not protect your name from others using it. If you want exclusive rights, register a trademark with the USPTO (federal) or Secretary of State (state).
Can I use the same DBA name in multiple counties?
Yes, if you file in each county (for county-level filers) or file once with the Secretary of State and list all counties. Sole proprietors and partnerships file separately in each county. LLCs and corporations file once at the state level and note all counties.
What happens if I do not renew my DBA before it expires?
Your DBA dies. You lose the legal right to use the name. You cannot enforce contracts under an expired DBA. Anyone can then file the same name. You face potential penalties for operating without a valid registration. Renewal costs the same as the original ($25 state; $20–$25 county). Calendar your renewal date months in advance.
Is there a DBA requirement at the federal level?
No. The federal government does not require DBAs. The IRS requires an EIN (Employer Identification Number) for tax purposes, but that is different from a DBA. Texas and other states set their own DBA requirements.
Can I register a DBA for a professional service like law or accounting?
Yes, with limitations. Certain professions (attorneys, accountants, medical doctors, etc.) have special rules. You may need to file as a “Professional Corporation” or “Professional Association” instead of or in addition to a DBA. Consult a professional services attorney in your field.
How much does a DBA cost?
State level (LLCs, corporations, limited partnerships): $25. County level (sole proprietors, general partnerships): $20–$25, depending on the county. Include additional fees for multiple owners or notarization if filing by mail.
Does a DBA protect my brand name?
No. A DBA registers your name with the state or county but does not prevent others from using it. Trademark registration does. File a trademark to protect your brand.
Can I file a DBA online?
State-level filings: Yes, through SOSDirect. County-level filings: Some counties allow online applications. Check your county clerk’s website.
Related reading
- Why Do Businesses Have a DBA? (w/Examples) + FAQs
- Do DBAs Have to Be Registered? (w/Examples) + FAQs
- How Does a DBA Work? (w/Examples) + FAQs
- Does Delaware Require DBA Registration? (w/Examples) + FAQs
- Does California Require DBA Registration? (w/Examples) + FAQs
- Should I Get a DBA for My Sole Proprietorship? (w/Examples) + FAQs
- An LLC Can Do That? – All Features Explained + FAQs