Average time
About 8 to 15 minutes, depending on whether you need property records.
A realistic fill-session estimate, not the time you would spend hunting for the form.
Texas statewide
Lock in the business name paperwork before you file or operate under it.
Use this form to ask for or update a business record. It helps the agency know who is responsible and what approval you need.
Your legal name and, if applicable, spouse information.
Your property address and mailing address.
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Average time
A realistic fill-session estimate, not the time you would spend hunting for the form.
Difficulty
Based on the kind of filing, the fields involved, and how much supporting info people usually need.
Best for
A plain-English read on why someone usually lands on this form.
What you will complete
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Chapter 1
Chapter 2
Chapter 3
Chapter 4
Strategic Brief
The Goal
Texas Form 503 is used to register or update an assumed name record so the state can connect the business name to the responsible person or entity. It is mainly used to keep business filings current and to show what name approval or authority is being requested.
The Warning
Legal name of the business or entity exactly as it appears on official records.
Assumed name or trade name to be registered or updated.
Responsible owner, officer, or authorized signer information.
Current business address and contact details.
Any existing filing details if this is an amendment or update.
Source confidence
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Walkthrough status
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Agency
Texas Secretary of State
Form identifier
Form 503
Estimated time
About 8 to 15 minutes, depending on whether you need property records.
Verified
May 2026
Jurisdiction
Texas statewide
Reference PDF
Plain-English guide
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Official form reference
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Next likely forms
Related official PDFs that often sit near this step in the same state, agency, or filing category.
Usually paired with property ownership, appraisal, exemption, or appeal paperwork.
Open the official form page, confirm the source, and continue with guided questions.
A common companion for ownership transfer, title, tag, and vehicle record tasks.