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Biz Formation Academy

A plain textbook on LLC paperwork, one state per chapter.

Chapter 3 · Maine

Foreign LLC Registration Chapter, Maine (2026): 5 Sections and the 3 Best Services

Summary for 2026: to handle registering an LLC formed elsewhere in Maine with outside help, choose among Maine Registered Agent.co ($199), ME Registered Agent.org ($199) and Mainstay Filing ($199), in that order. First decide whether registration applies. The remaining sections, 5 in all, give the form and the $250 fee.
Written by the Biz Formation Academy editorial board

Essential facts

Charge for registering $250 maine.gov (edition of October 2026)
Certificate from the state of formation 90 days Maximum age at filing
Annual report $150 Annual report for a foreign LLC
State cost, years 1 to 3 $550 State charges only
Chapter sections 5 Each one explained

You will be able to explain

  • When registration is required
  • How the filing is made
  • Recurring obligations
  • The services ranked highest

Maine: the ranked services

The editorial board's five criteria are explained on how we grade and determine the order.

1. Maine Registered Agent.co: best for an economical registration

Recommended first
Service $199; renewal $99 a year

Maine Registered Agent.co is ranked first in Maine: $199 beyond the state fee to register, then $99 each year.

Over three years it costs less than Mainstay Filing, and three-year cost counts for 34% of the ranking.

Price covers

  • Registration paperwork completed
  • A year of agent service is built into the price

Advantages

  • $199 and the state fee
  • Agent covered in year one
  • $99 a year for the agent afterward

Limitations

  • Limited to one state
Visit Maine Registered Agent.co Partner link. We may earn money if you buy.

2. ME Registered Agent.org: best for a small agent renewal

In-state service
Service $199; renewal $99 a year

ME Registered Agent.org is ranked second: $199 beyond the state fee to register, then $99 each year.

It charges exactly what Maine Registered Agent.co charges.

Price covers

  • Registration paperwork completed
  • A year of agent service is built into the price

Advantages

  • $99 a year for the agent afterward
  • $199 and the state fee
  • Agent covered in year one

Limitations

  • Limited to one state
Visit ME Registered Agent.org Partner link. We may earn money if you buy.

3. Mainstay Filing: best for LLCs that keep expanding

Handles the most paperwork
Service $199; renewal $149 a year

The third recommendation, Mainstay Filing: registration with Maine costs $199 over the state fee, with year one of the registered agent included.

Three years cost $100 above Maine Registered Agent.co, and cost counts for 34% of the ranking.

The agent line on the second invoice reads $149, and stays there in each state.

Price covers

  • Registration is filed for you
  • The registered agent carries no charge in year one
  • Service in all fifty states

Advantages

  • One price anywhere
  • A service charge of $199
  • The agent is free for the first year

Limitations

  • $50 more a year for the agent
Visit Mainstay Filing Partner link. We may earn money if you buy.

3 services, side by side

#ServiceFirst yearFrom year twoThree-year total
1 Maine Registered Agent.co $199$99/yr$397 Visit Maine Registered Agent.co Partner link. We may earn money if you buy.
2 ME Registered Agent.org $199$99/yr$397 Visit ME Registered Agent.org Partner link. We may earn money if you buy.
3 Mainstay Filing $199$149/yr$497 Visit Mainstay Filing Partner link. We may earn money if you buy.

Taken from each company's price page on November 13, 2026. No row includes the $250 state fee.

The Maine registration, in sequence

  1. Section 1

    When Maine requires registration

    Foreign registration is the filing by which an LLC formed outside Maine is authorized to do business in Maine. Doing business without registering risks: the courts of Maine are closed to its claims until it registers (31 MRSA 1629(1))

    Reference: legislature.maine.gov (edition of October 2026)

  2. Section 2

    Get proof of good standing from the state of formation

    You will need certificate of existence, dated within 90 days.

    Leave it until the other documents are ready.

  3. Section 3

    Arrange a Maine registered agent

    Every LLC must name a registered agent with an in-state street address. A noncommercial agent lists a physical street address in Maine, not a P.O. box. Commercial agents keep their address on file with the state.

    Every recommended service provides the registered agent.

    Reference: legislature.maine.gov (edition of October 2026)

  4. Section 4

    Next comes the Statement of Foreign Qualification to Conduct Activities

    The form and a fee of $250 are sent together to the Maine Secretary of State, Division of Corporations, UCC and Commissions.

    Reference: maine.gov (edition of October 2026)

  5. Section 5

    Handle Maine's recurring filing

    Note the Annual report for a foreign LLC and its $150 fee (June 1).

The price list

EntryRecipientCost
Registration fee Filing office$250
Annual report for a foreign LLC Filing office$150
Paid assistance The provider$199 at the start
State fees for the first three years Filing office$550

State fees come from the official pages in the bibliography. Over three years they consist of the filing, two reports and, in a few states, a minimum tax.

The reasoning behind the ranking

Tuition over three years accounts for 34% of the ranking, and led on it in Maine.

Add up years one to three with Maine Registered Agent.co and the sum is $397; the same period at Mainstay Filing runs $100 higher.

What readers ask

What is the cost to register a foreign LLC with Maine?

$250 for the filing. A service adds $199.

Which form do I file to register?

Out-of-state LLCs hand this form to The Maine Secretary of State, Division of Corporations, UCC and Commissions.

Do I need a certificate from my home state?

Yes: certificate of existence, issued within 90 days of filing.

What if the LLC does business there without registering?

the courts of Maine are closed to its claims until it registers (31 MRSA 1629(1))

What is due after registering?

Once registered, the LLC will owe the Annual report for a foreign LLC, billed at $150 each time.

Which service should handle the registration?

Choose Maine Registered Agent.co: the registration charge is $199 plus state fees, and the first agent year is already paid. Next are ME Registered Agent.org and Mainstay Filing.

Further reading

Bibliography and primary texts

  1. Cited for Maine Secretary of State: maine.gov, edition of August 2026.
  2. Cited for Maine Secretary of State: maine.gov, edition of August 2026.
  3. Cited for Maine report due date: maine.gov, edition of August 2026.
  4. Cited for 31 M.R.S. sec. 1531: legislature.maine.gov, edition of August 2026.
  5. Cited for Maine formation fee: Filing fee, official source: legislature.maine.gov, edition of October 2026.
  6. Cited for Maine registered agent statute: legislature.maine.gov, edition of October 2026.
  7. Cited for Maine Secretary of State, foreign entities: maine.gov, edition of October 2026.
  8. Cited for Form MLLC-12: maine.gov, edition of October 2026.
  9. Cited for 31 MRSA § 1622, foreign qualification: legislature.maine.gov, edition of October 2026.
  10. Cited for 31 MRSA § 1623, activities that do not: legislature.maine.gov, edition of October 2026.
  11. Cited for 31 MRSA § 1629, consequences of not qualifying: legislature.maine.gov, edition of October 2026.
  12. Prices quoted from the pricing page at Maine Registered Agent.co on November 13, 2026
  13. Prices quoted from the pricing page at ME Registered Agent.org on November 13, 2026
  14. Prices quoted from the Maine service page at Mainstay Filing on November 13, 2026