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The Formation Desk

Rankings of registered agents, LLC formation and foreign registration services in all 50 states.

Foreign registration picks · Maine

3 Best Foreign Registration Services in Maine (2026)

The The Formation Desk call for foreign registration services in Maine in 2026: Maine Registered Agent.co ($199), Mainstay Filing ($199) and ME Registered Agent.org ($199), in that order. Maine Registered Agent.co takes the call: the Maine registration for $199, first agent year included, then $99 yearly.
Written by The Formation Desk editorial team
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Our top pick

1. Maine Registered Agent.co: best for adding only Maine

$199 for the service, state fee on top; agent $99 a year after year one

Editorial score 9.5 out of 10

The desk picks Maine Registered Agent.co: $199 over the state fee to register in Maine, agent renewing at $99.

You get an in-state street address as the registered office, and papers served there are scanned into your account.

It wins the three-year cost comparison with Mainstay Filing.

In the price

  • Registration prepared and filed
  • A first year of registered agent service

Strengths

  • $199 to register, state fee extra
  • Registered agent service for year one is covered
  • Year-two agent price: $99

Cons

  • Maine only; your home state needs its own agent
  • EIN application will cost you $99 more
Visit Maine Registered Agent.coPartner link. We may earn money if you buy. Maine Registered Agent.co up close
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One price, any state

2. Mainstay Filing: best for companies working in more than one state

$199 plus the state fee ($499 due at checkout), then the agent at $149 a year from year two

Editorial score 9.1 out of 10

Runner-up, Mainstay Filing: $199 on top of state fees in any state, with the first year of registered agent service included.

The first agent year is free, and after that the agent runs $149 a year, in any state.

Maine Registered Agent.co undercuts Mainstay Filing by $100 over three years, and that is why Mainstay sits lower on cost.

In the price

  • The registration, prepared and filed for you
  • A free registered agent for the first year
  • Papers served on the company scanned and uploaded on the same business day, free

Strengths

  • Same price in all fifty states
  • Free scans of served papers on the same business day
  • Registered agent costs nothing in year one
  • $199 service fee, state fee on top

Cons

  • Agent renewal of $149 is $50 above Maine Registered Agent.co
Visit Mainstay FilingPartner link. We may earn money if you buy. Mainstay Filing up close
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Best for a Maine-only company

3. ME Registered Agent.org: best for Maine registrations only

$199 for the service, state fee on top; agent $99 a year after year one

Editorial score 9.0 out of 10

Third, ME Registered Agent.org: $199 over the state fee to register in Maine, agent renewing at $99.

You get an in-state street address as the registered office, and papers served there are scanned into your account.

On price and features there is nothing between Maine Registered Agent.co and ME Registered Agent.org, which makes the order a close call.

In the price

  • Registration prepared and filed
  • Registered agent service for year one

Strengths

  • Registration at $199 before state fees
  • Year-one registered agent service is in the price
  • Then $99 a year for agent service

Cons

  • Maine only; your home state needs its own agent
  • EIN application will cost you $99 more
Visit ME Registered Agent.orgPartner link. We may earn money if you buy. ME Registered Agent.org up close

The desk's 3 picks in brief

Pick Service Desk score Service fee Year two Good for Visit
1 Maine Registered Agent.co 9.5 $199 $99/yr The lowest agent renewal we rank here Visit Maine Registered Agent.coPartner link. We may earn money if you buy.
2 Mainstay Filing 9.1 $199 $149/yr Companies doing business in several states Visit Mainstay FilingPartner link. We may earn money if you buy.
3 ME Registered Agent.org 9.0 $199 $99/yr The lowest agent renewal we rank here Visit ME Registered Agent.orgPartner link. We may earn money if you buy.

The Formation Desk sets every score out of 10 itself from the weighted criteria on How we rank; customers do not rate anything.

What a Maine foreign registration service costs in 2026: year one, renewal and the three-year bill

Service Year one Year two Year three Bill over three years Agent covered in year one
Maine Registered Agent.co $199 $99 $99 $397 Included
Mainstay Filing $199 $149 $149 $497 Free
ME Registered Agent.org $199 $99 $99 $397 Included

Every price here was read off the company's own pages on November 12, 2026. Maine's $250 registration fee comes on top of every row and is left out of these totals.

Behind the order

The Formation Desk counts spend over three years and work the price removes for 33% each; what renewal looks like, fit with the state and plain price display make up the other 34%. What tipped Maine: spend over three years.

Maine Registered Agent.co comes to $397 over three years, $100 less than Mainstay Filing. Both include a first year of agent service, so the renewal price made the call.

The full criteria and weights are on How we rank.

Registering a foreign LLC in Maine: fee, form and who gets it

To register, the company files the Statement of Foreign Qualification to Conduct Activities (Form MLLC-12) with the Maine Secretary of State, Division of Corporations, UCC and Commissions and pays the state's $250. Maine also wants certificate of existence, issued within 90 days of the filing.

From then on the company owes the Annual report for a foreign LLC ($150), due June 1.

What to pull together first

  • Certificate of existence, issued in the 90 days before you file.
  • The company name exactly as the home state spells it, and when it was formed.
  • An in-state registered agent; any service the desk picked can fill that seat.
  • $250 for the state, paid when you file.
  • A date on your calendar for the Annual report for a foreign LLC and its $150 fee.

What it costs to ignore Maine registration

Until it registers, an outside LLC has no right to sue in Maine courts (31 MRSA 1629(1)).

Maine foreign registration service: reader questions

Does an LLC from elsewhere have to register to operate in Maine?

Yes, once it starts doing business there. Until it registers it cannot sue in the state's courts.

What will foreign registration cost you in Maine?

$250 goes to the state and $199 to the service.

What does Maine call its foreign registration form?

It goes to the Maine Secretary of State, Division of Corporations, UCC and Commissions, and the form's title is on the facts line above.

Will Maine ask for something from your home state?

Yes: certificate of existence, issued in the last 90 days.

Do you still need a registered agent after you register?

Yes. Keep a registered agent with a street address in the state on file.

Who is our pick for foreign registration in Maine?

Maine Registered Agent.co, since $199 plus the state fee, one year of registered agent service included, then $99 a year for the agent.

More from us

Where the numbers came from

  1. Maine Secretary of State, last checked August 2026
  2. Maine Secretary of State, last checked August 2026
  3. Maine report due date, last checked August 2026
  4. 31 M.R.S. sec. 1531, last checked August 2026
  5. Maine formation fee: Filing fee, official source, last checked October 2026
  6. Maine registered agent statute, last checked October 2026
  7. Maine Secretary of State, foreign entities, last checked October 2026
  8. Form MLLC-12, last checked October 2026
  9. 31 MRSA § 1622, foreign qualification, last checked October 2026
  10. 31 MRSA § 1623, activities that do not require qualification, last checked October 2026
  11. 31 MRSA § 1629, consequences of not qualifying, last checked October 2026
  12. Maine Registered Agent.co: pricing and service pages, as of November 12, 2026
  13. Mainstay Filing: Maine service page, as of November 12, 2026
  14. ME Registered Agent.org: pricing and service pages, as of November 12, 2026