Start a Maine LLC: Step-by-Step

Your LLC name has to be distinguishable from every other business entity already on file with the Maine Secretary of State, and "distinguishable" is a legal test, not a gut feeling. Names that differ only by punctuation, spacing, capitalization, or filler words like "the" and "and" may be treated as the same name and get rejected.

Run your proposed name through the state's ICRS name search before you commit to anything: letterhead, signage, a domain. Search the exact name and close variations, and look for anything that reads or sounds too similar. Catching a conflict now saves you a rejected filing and the delay of refiling by mail.

Maine naming rules

• Under 31 MRSA §1508, the name must contain "limited liability company" or "limited company," or the abbreviation "L.L.C.," "LLC," "L.C.," or "LC."
• It must be distinguishable on the records of the Secretary of State's office.
• The office can refuse a name that is obscene, promotes unlawful activity, or falsely suggests an association with public institutions.

Reserving a name

If you're not ready to file but want to hold the name, Maine lets you reserve it for 120 days by filing Form MLLC-1 with the Secretary of State. The fee is $20, and under §1509 the reservation can't be renewed, so time it for when you're close to filing. Reservation doesn't create the LLC. It just parks the name while you get the rest of your ducks in a row.

Assumed (DBA) names

If you'll operate under a name other than your LLC's legal name, Maine requires a separate assumed-name filing (Form MLLC-5) with the Secretary of State. That's a distinct process from forming the LLC and isn't something you handle inside the Certificate of Formation.

Before you fill out the Certificate of Formation, you need your registered agent settled, because the agent goes on the certificate and the form's SIXTH item states that the agent has consented to serve.

Maine law requires every LLC to keep a registered agent for as long as the company exists. The agent is who receives lawsuits, subpoenas, and official state mail on the company's behalf. Maine's registered agent law (5 MRSA §105) splits agents into commercial and noncommercial, and the certificate asks for different details for each.

Who can serve

• Yourself, as a noncommercial agent: You list your name, a physical location in Maine (the form says "not P.O. Box"), and a mailing address. Your address becomes part of the public record.
• Another noncommercial agent: Any other person or business you name directly, such as a co-owner, an employee, a Maine attorney, or a trusted contact, listed with the same physical Maine location and mailing address.
• A commercial registered agent: A company on the state's commercial registered agent (CRA) list. On the certificate you give only its name and CRA public number. This keeps a professional address on the public record instead of yours, and receiving documents is the company's everyday business.

Why it matters

If you list your home as the agent address, it's searchable on the state's business database forever, and if you're out on a job, traveling, or closed for the off-season when process is served, you can miss a lawsuit entirely and lose by default. A commercial service removes both problems: privacy on the public record, and coverage that doesn't depend on you being at your desk.

The Certificate of Formation is the filing that creates your LLC in Maine's records. Maine calls it a Certificate of Formation rather than the Articles of Organization used in most states, and it's filed on Form MLLC-6.

Here's the wrinkle you have to plan around: Maine does not offer online formation. You complete Form MLLC-6, print it, sign it, and mail it to the Secretary of State's Division of Corporations, UCC and Commissions in Augusta with the cover letter and the $175 filing fee, paid by check or money order to the Maine Secretary of State or by credit card on the state's charge voucher. The state's online services cover name searches and annual reports, not the creation of a new LLC. The forms and fees page has the form and mailing address.

What goes on the certificate

• LLC name: Your full legal name with a valid Maine designator
• Effective date: Effective on filing, or a later date you specify
• L3C and professional LLC boxes: Only if the LLC is a low-profit or professional LLC
• Registered agent: Either a commercial agent's name and CRA public number, or a noncommercial agent's name, physical Maine location, and mailing address, plus the statement that the agent has consented to serve
• Optional statement of authority
• Signature: At least one authorized person signs, under penalty of false swearing

What you don't have to include

Maine's certificate doesn't ask you to declare member-managed versus manager-managed, and it doesn't require you to name members or describe the business. Those details stay in your operating agreement, which is never filed. The public document stays short.

Timeline and expedite

Because it's mail-based, budget for postal transit to Augusta, the Division's review, and mail time back with your approved certificate. The Division's home page currently says corporate filings take 10 to 15 business days, while its LLC forms page still lists 40 to 55, and the home page warns that heavy expedite volume can cause delays. If you're racing a deadline, the cover letter offers next-business-day service for $50 extra or same-business-day service for $100. Either shortens the state's review but not the mail on either end.

Your operating agreement is the LLC's internal rulebook. Maine doesn't require you to file it, and it never enters any public database, but you should have it in place before you start doing business, add members, or open bank accounts.

What a solid operating agreement covers

• Ownership: Member names, ownership percentages, and how interests are expressed
• Capital contributions: What each member put in at the start and what future contributions are expected
• Profit and loss allocation: How profits and losses are split, usually by ownership percentage, but it doesn't have to be
• Distributions: When and how cash gets paid out, and in what order
• Management: Whether the company is member-managed or manager-managed, who has authority to act, and which decisions need a full member vote
• Voting: Whether votes are weighted by ownership, per member, or another way
• Transfers: What happens when a member wants to sell or leave: rights of first refusal, approval requirements
• Dissolution: The circumstances under which the company winds down and how remaining assets are distributed

For a single-member LLC, the agreement reinforces that the company is genuinely separate from you, something a court weighs if anyone challenges your liability protection, and something most banks want to see. For a multi-member LLC it's essential: skip it and Maine's Title 31 defaults govern everything, often in ways the members never intended.

An Employer Identification Number is a nine-digit federal tax ID the IRS issues for free. Think of it as a Social Security number for the business. You use it on tax filings, to open bank accounts, and to hire and pay employees.

When you need one

• Your LLC has more than one member: multi-member LLCs file a partnership return and must have an EIN
• You plan to hire employees
• You want a business bank account (almost every bank requires an EIN)
• You've elected S-corp or C-corp taxation

A single-member LLC with no employees can technically use the owner's SSN federally, but most advisors get an EIN anyway. It keeps your Social Security number off business paperwork and makes opening accounts cleaner.

How to apply

Head to the IRS EIN Assistant on IRS.gov and complete the request online. Roughly ten minutes of work gets you the number right away: save or print the confirmation and put it to use that same day. You need a U.S. Social Security number or ITIN to file online. Non-U.S. applicants without an ITIN apply by fax or mail on Form SS-4. If Mainstay forms your LLC, we apply for the EIN for you once the certificate is on file.

Keeping business and personal money separate isn't optional if you want the liability shield to hold. Pay personal bills from the company account, or drop business income into your personal checking, and you hand a future opponent an argument that the LLC is a sham and shouldn't protect you.

What Maine banks typically ask for

• Your approved Certificate of Formation from the Secretary of State
• Your IRS EIN confirmation
• Your operating agreement, which many banks want to see, so have it ready
• Government-issued ID for every authorized signer

Maine community banks and credit unions are often more comfortable with brand-new LLCs than the big national chains, and several online business banks can open an account without a branch visit. Compare monthly fees, transaction limits, and minimum balances before you pick.

Most of the compliance work is front-loaded into formation. After that, it's mainly one annual filing plus keeping your agent and address current.

Annual report

File your annual report between January 1 and June 1 each year, starting the year after you form, either through Annual Reports Online or on the preprinted paper form (postmarked by June 1). The fee is $85. It covers your registered agent, principal office, a brief description of the business, and at least one member or manager, and it is not a financial disclosure. Missing June 1 adds a $50 late penalty; leaving it unpaid leads to administrative dissolution, after which reinstatement costs $150 (capped at $600) plus the missing reports.

Registered agent maintenance

If your agent changes address, resigns, or you switch services, file Form CLK/RA-3 promptly. The fee is $35. A stale agent address leaves you non-compliant even when everything else is current, and it's how owners miss lawsuits.

Taxes

Federally, single-member LLCs file Schedule C, multi-member LLCs file Form 1065, and S-corp elections file Form 1120-S. Maine has its own income tax, so members report LLC income on their Maine returns. If you sell taxable goods or services, register with Maine Revenue Services for sales tax.

Licenses and permits

Maine doesn't issue a single general business license, but many trades and professions require state licensure, and some towns require local permits. These run on their own schedules and are entirely separate from your LLC filing with the Secretary of State.