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Maine . 2026 filing guide

Maine Secretary of State filings, deadlines, and how to do them right.

Annual reports, business search, registered agent changes, reinstatement, dissolution, tax registration. Every Maine filing explained, plus the business environment, regulatory bodies, and a year-round compliance calendar. Verified against the Maine Secretary of State, Bureau of Corporations as of June 2026.

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Verified against Maine Secretary of State, Bureau of Corporations on Jun 12, 2026
Agency
Maine Secretary of State, Bureau of Corporations
Branded as Maine Bureau of Corporations
Phone
207-624-7752
Mon-Fri 8am-5pm ET
Annual due
June 1
$50 penalty
Processing
3-5 business days
Online filings
Maine business environment

Why founders choose Maine (and what to know first)

No local sales tax (state level only). Strong tourism economy. Natural resource industries. New England market access.

Economy
~$80B economy
Registered entities
~150,000 active entities
New formations / year
~20,000 annually
Key industries
Tourism, forestry + paper, lobster + seafood, healthcare, technology (Bangor, Portland), shipbuilding
Maine tax profile

Tax obligations at a glance

Tax type Where Maine stands
State income tax5.8% to 7.15%
Corporate income tax3.5% to 8.93% graduated
Sales tax5.5% state (no local)
Franchise taxInsurance franchise tax only; general businesses no franchise tax

Tax obligations depend on entity type, where you operate, and where revenue is sourced. Consult a licensed CPA for entity-specific advice. File.Business connects you with vetted CPAs in Maine on request.

Beyond the SoS

Other Maine agencies your business will touch

The Secretary of State handles formation and corporate filings. These agencies handle the rest of your Maine compliance.

Maine Revenue Services
207-626-8475

State income tax, sales tax, withholding

Maine Dept of Labor
207-621-5120

Unemployment insurance

Maine Bureau of Insurance
207-624-8475

Insurance licensing

Maine Workers Compensation Board
207-287-7086

Workers comp

Maine Office of Professional + Occupational Regulation
207-624-8500

Professional licensing

Maine Bureau of Alcoholic Beverages
207-287-3721

Alcohol licensing

Maine compliance calendar

Year-round filings every Maine business should know

Recurring federal and state deadlines that affect Maine businesses. Our Compliance Calendar tracks these and 200+ others against your entity.

WhenWhat is due
June 1Maine annual filing deadline
Jan 31W-2 and 1099 deadlines (federal, applies to all state employers)
Mar 15Form 1065 and 1120-S deadline (pass-through entities)
Apr 15Form 1040 + Q1 federal estimated tax
Jun 15Q2 federal estimated tax
Sep 15Q3 federal estimated tax. Extended 1120-S / 1065
Oct 15Extended 1040 / 1120 deadline
Dec 31Year-end. BOI updates due within 30 days of beneficial-owner changes (FinCEN).
View full Maine compliance calendar →
How-to . LLC formation

How to form an LLC in Maine: step by step

Each step explained with what Maine requires. File.Business handles all of this for $0 service fee plus the $175 state fee.

1
Pick a name

Search the state business name database to confirm the name is distinguishable. Must include LLC, L.L.C., or Limited Liability Company.

2
Choose a registered agent

State street address required (no P.O. Box). The agent must accept the appointment and be available during business hours.

3
File the Articles of Organization

Submit to the Secretary of State with the state filing fee. Online filing is the fastest channel.

4
Draft the operating agreement

Not filed with the state but legally important. Defines members, contributions, distributions, and manager rules.

5
Apply for an EIN

IRS Form SS-4. Online if a member has an SSN; mail/fax if all members are non-US.

6
Open a business bank account

Most banks require: Articles, EIN letter, operating agreement, and beneficial-owner ID.

7
Register for state tax accounts

Department of Revenue for sales tax, withholding accounts if hiring employees.

Start your Maine LLC →

Ready to file your Maine paperwork the easy way?

Five minutes per filing. State fee passed through at cost. Audit trail and deadline tracking included.

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Disclosure. File.Business is a private business filing and compliance service. We are not a government agency and are not affiliated with the Maine Secretary of State, Bureau of Corporations or any Secretary of State office. You may file directly with the Maine Secretary of State, Bureau of Corporations. Information on this page is for general guidance only and is not legal, tax, or accounting advice. Filing fees and deadlines verified against the Maine Secretary of State, Bureau of Corporations as of June 2026 and may change. For entity-specific guidance, consult a licensed Maine attorney or CPA.

File.Business is a private business filing and compliance service. We are not a government agency and are not affiliated with any Secretary of State office. You may file directly with the appropriate state agency. SOC 2 Type II audited. 220,000+ businesses formed since 2017.