How to name your LLC: rules and name availability checks

A rejected name is the most common reason an LLC filing bounces. The rules are simple once you know them, and a ten-minute check before filing avoids most problems. This guide covers the rules, how to check a name, and what registering it does and does not protect.

By Awais Jameel, Chartered Accountant. Reviewed by Hamza Fida, Chartered Accountant. Checked against official sources on . 3 minute read.

Short answer

LLC name rules are set by each state, but three apply almost everywhere. The name must include an LLC ending such as "LLC" or "Limited Liability Company". It must be distinguishable from names already on the state's records. And it must not use restricted words such as "bank" without approval. Check the state's business search, then check trademarks, before you file.

At a glance

Required ending
LLC, L.L.C. or Limited Liability Company
Must be
Distinguishable from names on the state's records
Restricted words
Bank, insurance, university and similar
Availability check
The state's business search, free
Name reservation
Optional, for a fee and a limited time
Trademark rights
Not created by the state filing
How to name your LLC: rules and name availability checksSteps: 1. Search the state's records; 2. Check close variations; 3. Search trademarks; 4. Check the web address; 5. File or reserve.THE PROCESS AT A GLANCEHow to name your LLC: rules and name availabilitychecks1Search thestate's recordsUse the free businessname search on theSecretary of State'swebsite2Check closevariationsTry plurals,abbreviations andspellings that soundthe same3Search trademarksLook for the same orsimilar names in theUSPTO trademarkdatabase4Check the webaddressA matching domain namematters for mostbusinesses5File or reserveFile the formationdocument, or reservethe name first if youare not readyChecked against official sourcesTax BakersHow to name your LLC: rules and name availability checksSteps: 1. Search the state's records; 2. Check close variations; 3. Search trademarks; 4. Check the web address; 5. File or reserve.THE PROCESS AT A GLANCEHow to name your LLC: rules andname availability checks1Search the state's recordsUse the free business name search on theSecretary of State's website2Check close variationsTry plurals, abbreviations and spellingsthat sound the same3Search trademarksLook for the same or similar names in theUSPTO trademark database4Check the web addressA matching domain name matters for mostbusinesses5File or reserveFile the formation document, or reserve thename first if you are not readyChecked against official sourcesTax Bakers
The process at a glance: 1. Search the state's records; 2. Check close variations; 3. Search trademarks; 4. Check the web address; 5. File or reserve.

What are the basic LLC name rules?

  • An LLC ending. Every state requires words or an abbreviation showing the company is an LLC. Delaware, for example, requires "Limited Liability Company", "L.L.C." or "LLC". Some states accept a few more forms, such as "Limited Company" or "LC".
  • A distinguishable name. The name must differ from the names of other entities on the state's records.
  • No restricted or misleading words. Words that suggest a regulated business or a government body are limited.
  • No wrong entity type. An LLC's name cannot suggest it is a corporation, for example by using "Inc." or "Corp."

What does distinguishable mean?

That the state can tell the two names apart on its records. Small differences usually do not count: punctuation, capital letters, "the", "and" against an ampersand, singular against plural, or a different ending such as "LLC" against "Inc." So "Blue River LLC" is normally unavailable if "Blue River, Inc." exists. States apply the test with different levels of strictness.

Which words are restricted?

  • Regulated industries: words such as "bank", "trust", "insurance" and "university" usually need approval from the regulator or proof of a license.
  • Professions: titles such as "engineer" or "attorney" can require a professional license in some states.
  • Government: names that imply a link to a federal or state agency, such as "Federal" or "Treasury", are generally refused.

How do you check and secure a name?

  1. Search the state's records

    Use the free business name search on the Secretary of State's website.

  2. Check close variations

    Try plurals, abbreviations and spellings that sound the same.

  3. Search trademarks

    Look for the same or similar names in the USPTO trademark database.

  4. Check the web address

    A matching domain name matters for most businesses.

  5. File or reserve

    File the formation document, or reserve the name first if you are not ready.

Do you need a name reservation?

Usually not. A reservation holds a name for a limited period, often a few months, for a fee. Filing the formation document secures the name without one. A reservation is worth it only if you need time before filing and the name matters to you. See Articles of Organization explained.

Does registering the name protect it?

Only on that state's business register. Forming an LLC stops another entity registering the same name in that state. It gives no trademark rights: a business that already has trademark rights in the name can still object to your using it, and a company in another state can form under the same name. Brand names are protected through trademark law, including federal registration with the USPTO for the goods or services you sell.

What if you want to trade under a different name?

Register it as an assumed name. See what a DBA is. The same applies if your LLC expands into a state where its name is already taken: most states let it register there under an alternate name. See foreign LLC registration.

Can you change the name later?

Yes, by filing an amendment to the formation document and paying the state's fee. Wyoming, for example, charges $60 for an amendment. Then update the IRS, your bank, licenses and contracts. The EIN stays the same.

Want your name checked before you file?

We check your name against the state's records and the trademark database, and file the LLC once it is clear.

Questions people ask

What are the rules for naming an LLC?

The name must include an LLC ending, be distinguishable from other names on the state's records, and avoid restricted words such as bank or insurance unless approved.

Does my LLC name have to include LLC?

Yes. Every state requires an ending such as LLC, L.L.C. or Limited Liability Company in the legal name.

How do I check if an LLC name is available?

Search the free business name database on the Secretary of State's website for the state where you will form the LLC.

Does forming an LLC trademark the name?

No. It only reserves the name on that state's business register. Trademark rights come from trademark law.

Sources

Every fee, date and rule on this page was taken from these official and primary sources.

  1. USPTO: Search the trademark database
  2. U.S. Small Business Administration: Choose your business name
  3. Delaware Division of Corporations: Certificate of Formation form, rev. 8/2026
  4. Wyoming Secretary of State: Business Division fee schedule, effective July 1, 2026

Rules and fees change. If you are reading this long after October 1, 2026, confirm the figures with the source before you rely on them.

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This guide is general information. It is not tax or legal advice for your situation.