How to Start an LLC in Maine (Step-by-Step Guide)

Forming an LLC in Maine requires filing a Certificate of Formation with the Maine Secretary of State and paying a $175 filing fee. The process takes about 5-10 business days for standard processing.

Follow these steps to start your Maine LLC in 2026.

How to Start an LLC in Maine (6 Steps)

Step 1: Name Your Maine LLC

Your LLC name must be distinguishable from other business names registered in Maine. The name must include “Limited Liability Company,” “LLC,” or “L.L.C.”

Search the Maine Secretary of State business name database to check availability. You can also reserve a name for 120 days by filing an Application for Reservation ($20 fee).

Maine naming rules:

• Must include an LLC designator (LLC, L.L.C., or Limited Liability Company)
• Cannot be the same as or deceptively similar to an existing entity on file with the Secretary of State
• Cannot include words implying it’s a government agency or restricted terms without proper licensing

Step 2: Choose a Registered Agent

Maine requires every LLC to have a registered agent with a physical street address in Maine. The registered agent accepts service of process and official state correspondence on behalf of your LLC.

You can serve as your own registered agent (if you have a Maine address), or use a professional service. Our top recommendation is Northwest Registered Agent ($39/year), which also handles LLC formation for $39 + the $175 state fee.

Step 3: File Your Certificate of Formation

File Form MLLC-6 (Certificate of Formation) with the Maine Secretary of State. Currently, Maine only accepts mail filings for LLC formation — there is no online option.

Filing details:

• Filing fee: $175
• Filing method: Mail only (no online filing available)
• Mailing address: Department of the Secretary of State, Corporations, UCC and Commissions, 101 State House Station, Augusta, ME 04333
• Processing time: 5-10 business days after receipt

Information required:

• LLC name
• Registered agent name and registered office address in Maine
• Principal office address
• Name and address of at least one organizer
• Whether the LLC is member-managed or manager-managed
• Effective date (can be future-dated)

Step 4: Create an Operating Agreement

Maine doesn’t legally require an operating agreement, but having one is strongly recommended. It establishes ownership structure, profit distribution, and management responsibilities — and it’s usually required to open a business bank account.

Step 5: Get an EIN

Apply for an Employer Identification Number (EIN) through the IRS website. It’s free and takes about 15 minutes online. You need an EIN to open a business bank account, hire employees, and file taxes.

Step 6: Register for Maine Taxes

After forming your LLC, register with the Maine Revenue Services for applicable state taxes. If you plan to sell taxable goods or services, you’ll also need to register for a Maine sales tax permit.

You can register online through the Maine Revenue Services website.

Maine LLC Costs

Total first-year cost: $260-$559 (depending on whether you use a registered agent service). See our complete guide to LLC costs by state.

Maine LLC Taxes

Maine LLCs are treated as pass-through entities by default — profits flow through to members’ personal tax returns.

• State income tax: 5.8% to 7.15% (graduated individual income tax rates)
• No franchise or entity-level tax: Maine does not impose a franchise tax or separate entity-level tax on LLCs
• Sales tax: 5.5% state rate (no local sales tax in Maine)
• Federal taxes: Standard pass-through taxation — profits pass to members’ personal returns
• Self-employment tax: 15.3% on net self-employment income (federal)

Annual Requirements for Maine LLCs

• Annual report: Due June 1 each year, filed with the Maine Secretary of State. $85 filing fee.
• State income tax: Maine individual income tax returns are due April 15.
• Maintain a registered agent: Must have a registered agent with a Maine address at all times.

Frequently Asked Questions

How long does it take to form an LLC in Maine?

Processing takes approximately 5-10 business days after the Secretary of State receives your filing. Maine currently only accepts mail filings for LLC formation, so factor in transit time as well.

Can I file my Maine LLC online?

No, Maine does not currently offer online filing for the initial Certificate of Formation. You must file by mail. However, annual reports can be filed online.

Does Maine require an operating agreement?

No, Maine doesn’t legally require an operating agreement. However, we strongly recommend creating one. It protects your personal liability and most banks require one to open a business account.

Can I form a Maine LLC if I live in another state?

Yes. You can form a Maine LLC regardless of where you live. You’ll need a registered agent with a physical Maine address. However, if you primarily do business in another state, you may be better off forming your LLC there instead. See our how to start an LLC guide for more on choosing the right state.

How much does a Maine LLC cost per year?

The annual report costs $85 per year. Add $39-$299 for a registered agent service. Maine doesn’t have a franchise tax or entity-level tax, so ongoing costs are relatively straightforward.

Start an LLC in Another State

Click your state below for a step-by-step formation guide with filing fees, requirements, and timelines.