To name an LLC, pick a name that includes a required designator like “LLC” or “Limited Liability Company,” is distinguishable from every other business entity already on file in your state, avoids government-related and other restricted words, and doesn’t collide with a federal trademark. Get those four things right and your formation paperwork clears; miss any one of them and you’re looking at a rejection, a rebrand, or a lawsuit.
Include an LLC Designator
Every LLC name has to end with a designator that identifies the entity type. Under the Revised Uniform Limited Liability Company Act, which most states have adopted in some form, acceptable options are “limited liability company” or “limited company,” or one of the standard abbreviations: “L.L.C.,” “LLC,” “L.C.,” or “LC.”1Bureau of Indian Affairs. Uniform Limited Liability Company Act (2006) Most states also accept “Ltd.” for “Limited” and “Co.” for “Company.”
The designator does real work. It tells vendors, landlords, and customers that they’re dealing with a liability-shielded entity, not a sole proprietor personally on the hook for every debt.
If you’re a licensed professional forming an LLC, such as a doctor, lawyer, architect, or engineer, many states require a Professional Limited Liability Company instead, with “PLLC” or “P.L.L.C.” as the designator. Not every state offers PLLCs, and a handful don’t allow them at all. Check with your Secretary of State’s office before filing to confirm the right entity type for your profession.
Make the Name Distinguishable from Existing Entities
Your proposed name must be “distinguishable on the records” of your state’s filing office, usually the Secretary of State.1Bureau of Indian Affairs. Uniform Limited Liability Company Act (2006) Your name can’t be identical to, or effectively the same as, any active business entity, reserved name, or registered trade name already on file.
The standard is narrower than most people expect. Entity-type designators like “LLC,” “Inc.,” and “LP” get stripped out before the filing office compares names.1Bureau of Indian Affairs. Uniform Limited Liability Company Act (2006) So “Greenfield Consulting LLC” and “Greenfield Consulting Inc.” are treated as the same name. Cosmetic tweaks almost never save a filing either: adding a plural, swapping punctuation, or inserting “the” won’t get you past a name already in use. What does work is a meaningful change to a substantive word. “Greenfield Consulting” and “Greenfield Construction” would likely clear the bar because the core words are actually different.
One workaround exists. If the owner of the existing name consents in writing, most states will register a name that would ordinarily be rejected.1Bureau of Indian Affairs. Uniform Limited Liability Company Act (2006) This occasionally happens with franchise arrangements. For most new LLCs, picking a clearly distinct name is easier.
Avoid Restricted and Prohibited Words
Some words will get your filing rejected outright. Others require extra paperwork before the state will approve them.
Prohibited words are those suggesting a government connection. Names implying affiliation with a federal, state, or local agency are banned across virtually every state. Anything using “FBI,” “Treasury,” “State Department,” or similar language triggers an immediate rejection of your articles of organization.
Restricted words need special approval but aren’t banned entirely. Most tie to regulated industries:
- Banking terms like “bank,” “trust,” “credit union,” or “deposit” typically require approval from the state banking regulator.
- Insurance terms like “insurance,” “insurer,” or “underwriter” usually require a letter from the state insurance department.
- Education terms like “university,” “college,” or “academy” often require authorization from the state education department.
- Professional titles like “attorney,” “doctor,” or “engineer” frequently require proof of professional licensing from the relevant state board.
The exact list of restricted words and required approvals varies by state. If your name includes any term tied to a regulated industry or licensed profession, contact your Secretary of State before filing to find out what documentation they need. Submitting without it means a rejection, and in most states the filing fee is non-refundable.
Search State and Federal Databases
Before you file anything or pay any fees, search your state’s business entity database. Every Secretary of State maintains an online search tool. Look up your exact name first, then obvious variations: different spellings, rearranged word order, and the name without the LLC designator.
A clean state search only tells you the name is available at the state level. It says nothing about federal trademarks, business names in other states, or domain names. That gap matters, because a name your Secretary of State happily approves can still land you in federal court if it infringes someone else’s trademark.
Under the Lanham Act, anyone who uses a name in commerce that is “likely to cause confusion” with another person’s goods or services faces civil liability.2Office of the Law Revision Counsel. 15 USC 1125 – False Designations of Origin and False Descriptions Forbidden The trademark owner doesn’t have to be registered in your state or even operate there. A federal trademark registration gives nationwide protection.
Search the USPTO’s trademark database before committing. The search is free on the USPTO website. Look for exact matches first, then phonetic equivalents and names close enough to cause marketplace confusion. A name that’s available on your state registry but identical to a federally registered trademark is a lawsuit waiting to happen. A federal court can issue an injunction forcing you to stop using the name immediately.3Office of the Law Revision Counsel. 15 USC 1116 – Injunctive Relief On top of that, the trademark holder can recover your profits earned under the infringing name, their own lost profits, and lawsuit costs.4Office of the Law Revision Counsel. 15 USC 1117 – Recovery for Violation of Rights The practical fallout compounds that: new signage, reprinted materials, revised contracts, domain changes, updated bank accounts, and lost customer recognition.
Reserve the Name if You’re Not Ready to File
Most states let you reserve an LLC name before filing your articles of organization. This is useful when you’ve settled on a name but aren’t ready to formally create the LLC, maybe because you’re still drafting an operating agreement, gathering capital, or waiting on a professional license.
Submit a name reservation application to your Secretary of State, pay the fee, and the name is held exclusively for you during the reservation period. A few practical details:
- Reservation periods range from 30 to 120 days depending on your state, with 60 and 120 days being most common.
- Filing fees generally run between $10 and $40.
- The name on your reservation must exactly match what you later put on your articles of organization. Even small discrepancies can cause a rejection.
- Renewal rules vary. Some states allow you to renew for another period; others don’t. If renewal isn’t allowed and the reservation expires, the name returns to the public pool.
Once approved, you’ll receive a certificate or stamped confirmation that serves as proof the name is being held for you.
Using a DBA Instead of the Legal Name
Your LLC’s legal name doesn’t have to be the name your customers see. If you want a different brand identity, you can register a “doing business as” (DBA) name, also called a fictitious name or assumed name depending on the state.
This comes up often. Your legal name might be “Johnson Holdings LLC” while you run a coffee shop called “Morning Grind.” Or you’re launching a second business line under the same LLC and want a distinct brand without forming a new entity. A DBA lets you conduct business, open bank accounts, and accept payments under the alternate name while keeping the LLC’s legal protections intact.
The registration process varies. Some states handle DBA filings at the Secretary of State level; others require registration with the county clerk. Several states also require you to publish the fictitious name in a local newspaper. Fees range from about $10 to over $100 depending on jurisdiction and publication requirements.
A DBA does not create a separate legal entity and provides no liability protection beyond what the LLC itself gives you. It’s a naming tool, not a shield. All obligations, debts, and lawsuits still flow through the underlying LLC.
Changing Your LLC Name Later
If you need to rename your LLC after it’s registered, you’ll file a document commonly called a “Certificate of Amendment” or “Articles of Amendment” with your Secretary of State. The amendment has to be approved in whatever manner your operating agreement or state law requires, which for most LLCs means a vote of the members.
The new name goes through the same scrutiny as an original filing: LLC designator, distinguishability, no restricted or prohibited words. Filing fees are generally in the same range as the original formation.
After the state approves, notify the IRS. A name change does not require a new Employer Identification Number.5Internal Revenue Service. When to Get a New EIN Instead, report the new name by checking the name-change box on your next tax return. The specific line depends on how your LLC is taxed: on Form 1065 for LLCs filing as partnerships, and on Form 1120 or 1120-S for those taxed as corporations.6Internal Revenue Service. Business Name Change If you’ve already filed your return for the year, write to the IRS at the address where you filed.
Don’t overlook the downstream updates. Bank accounts, business licenses, insurance policies, contracts, vendor agreements, and any DBA registrations tied to the old name all need to reflect the change. Most institutions will want to see a certified copy of the approved amendment before updating their records, so order several certified copies when you file.