Maine LLC Name Search and Naming Rules

Maine keeps its business entity records in a public database called ICRS: the Interactive Corporate Registration and Reporting System. Before you commit to a name, you search it there to make sure nothing conflicting is already on file.

Where to search

Use the ICRS name search on the Secretary of State's site. Enter your proposed name and review what comes back. The database includes not just LLCs but corporations and other registered entities, since your name has to be distinguishable from all of them, not only from other LLCs.

Search smart, not just exact

Don't only type your exact name and stop when nothing matches. Search:

• The exact name you want
• Variations with and without the designator ("LLC," "Limited Liability Company")
• Close spellings and singular/plural forms
• The distinctive core word on its own, to see nearby entries

The goal is to find anything the Bureau might consider too similar, not to confirm one precise string is free. A near-match you missed becomes a rejected filing, and because Maine formation is by mail, that's a slow round trip to correct.

Availability isn't approval

A clear search is a strong signal, but the Bureau makes the final call when it reviews your Certificate of Formation. The search tells you a name is likely available; it doesn't guarantee acceptance. Treat a clean result as a green light to proceed, not a legal reservation of the name.

Maine, like every state, requires your LLC name to be "distinguishable upon the record" from existing entity names. That's a legal standard, and it trips people up because it's stricter than everyday intuition.

Differences that usually don't make a name distinguishable

• Adding or removing "the," "a," or "and"
• Changing punctuation, spacing, or capitalization
• Swapping the entity designator (turning "LLC" into "Inc." doesn't distinguish the name)
• Singular versus plural of the same word
• Adding a word that merely describes the same business ("Portland Roofing" vs. "Portland Roofing Company")

Differences that usually do

• A genuinely different distinctive word
• A meaningfully different combination of words that isn't just a trivial variation

If your first choice reads a lot like something already on file, assume it won't clear and pick something with real separation. It's cheaper to choose a stronger name now than to refile after a rejection.

Beyond availability, Maine imposes rules on what an LLC name must and must not contain. Get these right before you file.

Required designator

Your name must include a proper indicator that the business is an LLC. Maine accepts:

• "Limited Liability Company" or "Limited Company"
• "LLC" or "L.L.C."
• "LC" or "L.C."

The Certificate of Formation also has separate check boxes for low-profit LLCs (L3Cs) and professional LLCs, so if you're forming one of those, mark the right box when you file.

Names the office can refuse

Under 31 MRSA §1508, the Secretary of State's office can refuse a name that:

• Is obscene
• Promotes unlawful activity
• Falsely suggests an association with public institutions

Keep it clean

The safest names use a distinctive word or phrase plus the required designator, and stay away from anything that implies a link to a public institution you don't have. If your business needs a professional or occupational license, check with that licensing board about naming before you file too.

If you've found an available name but you're not ready to file the Certificate of Formation (maybe you're still lining up partners, financing, or your registered agent), Maine lets you hold it.

How reservation works

File a name reservation (Form MLLC-1) with the Secretary of State. A reservation holds your chosen name for 120 days, keeping anyone else from registering it while you get ready. The state fee is $20, and under §1509 the reservation can't be renewed when the 120 days run out.

What reservation is and isn't

• It is a way to lock a name so it doesn't get taken out from under you during your prep window.
• It is not the formation of the LLC. Reserving a name doesn't create a company, and you still have to file the Certificate of Formation to actually form it.

Most owners who are ready to move don't bother reserving; they just file. Reservation earns its keep when there's a real gap between choosing the name and being ready to file, and the name is one you can't risk losing.

Clearing the state's database is only one layer of "is this name available." A few other checks are worth doing before you build a brand around the name.

Domain and social handles

A name that's free with the Secretary of State may already be taken as a website domain or social media handle. Check domain availability early. It's often the practical constraint that shapes the final name, and it's cheaper to adjust now than after you've printed materials.

Trademark

State availability is not trademark clearance. Another business could hold trademark rights to a similar name even if Maine's database is clear, which can create legal exposure if you build a brand that infringes. For anything you plan to invest in heavily, search the federal trademark database and consider consulting a trademark attorney.

Assumed names (DBAs)

If you want to operate under a name different from your LLC's legal name, that's an assumed-name filing (Form MLLC-5) with the Secretary of State, separate from forming the LLC. This lets a single LLC run one or more public-facing brands while keeping one legal entity.

How Mainstay Filing helps

When you form with us, we check name availability as part of preparing your Certificate of Formation, so you're not filing blind into a rejection. If your first choice conflicts, we flag it before it costs you a mailed round trip. We can also handle a name reservation or an assumed-name filing if your situation calls for it.