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The Formation Desk

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

Foreign registration picks · Missouri

3 Best Foreign Registration Services in Missouri (2026)

The The Formation Desk call for foreign registration services in Missouri in 2026: Missouri Registered Agent.co ($199), MO Registered Agent.org ($199) and Mainstay Filing ($199), in that order. Missouri Registered Agent.co takes the call: $199 over the state fee to register in Missouri, agent renewing at $99.
Written by The Formation Desk editorial team
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Top pick on this page

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

A $199 service fee plus state fees, then $99 a year for the agent

Editorial score 9.2 out of 10

The desk picks Missouri Registered Agent.co: $199 plus the state fee, one year of registered agent service included, then $99 a year for the agent.

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

Its three-year bill sits under Mainstay Filing's, which counts heavily in our method.

In the price

  • The registration filing
  • The first year as your registered agent

Strengths

  • Includes a first year as your registered agent
  • Registers the company for $199, plus the state's fee
  • Year-two agent price: $99

Cons

  • Missouri only; your home state needs its own agent
  • EIN application will cost you $99 more
Visit Missouri Registered Agent.coPartner link. We may earn money if you buy. Missouri Registered Agent.co up close
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Best value here

2. MO Registered Agent.org: best for Missouri registrations only

$199 plus the state fee, then the agent at $99 a year from year two

Editorial score 9.0 out of 10

Runner-up, MO Registered Agent.org: $199 plus the state fee, one year of registered agent service included, then $99 a year for the agent.

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

The published prices and features do not separate Missouri Registered Agent.co from MO Registered Agent.org; take whichever you like.

In the price

  • The registration filing
  • The first year as your registered agent

Strengths

  • $99 yearly to keep the agent
  • $199 to register, state fee extra
  • A year of registered agent service comes in the price

Cons

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

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

$199 for the service, $304 due at checkout with the state fee; agent $149 a year after year one

Editorial score 8.9 out of 10

Third, Mainstay Filing: $199 plus the state's own fee, the registered agent free for year one and the same price in every state.

Agent service costs nothing in year one and $149 a year from then on, whichever state you register in.

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

In the price

  • Your foreign registration, handled
  • The first year as your registered agent, free
  • Scanned service of process delivered the same business day at no cost

Strengths

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

Cons

  • Agent renewal of $149 is $50 above Missouri Registered Agent.co
Visit Mainstay FilingPartner link. We may earn money if you buy. Mainstay Filing up close

The desk's 3 picks in brief

Pick Service Desk score Service fee Year two Good for Visit
1 Missouri Registered Agent.co 9.2 $199 $99/yr The lowest agent renewal we rank here Visit Missouri Registered Agent.coPartner link. We may earn money if you buy.
2 MO Registered Agent.org 9.0 $199 $99/yr The lowest agent renewal we rank here Visit MO Registered Agent.orgPartner link. We may earn money if you buy.
3 Mainstay Filing 8.9 $199 $149/yr Companies doing business in several states Visit Mainstay FilingPartner 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 Missouri 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
Missouri Registered Agent.co $199 $99 $99 $397 Included
MO Registered Agent.org $199 $99 $99 $397 Included
Mainstay Filing $199 $149 $149 $497 Free

Every price here was read off the company's own pages on November 12, 2026. Missouri's $105 registration fee comes on top of every row and is left out of these totals.

What tipped 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 Missouri: spend over three years.

Missouri 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 Missouri: fee, form and who gets it

To register, the company files the Application for Registration of a Foreign Limited Liability Company (Form LLC 4) with the Missouri Secretary of State, Corporations Division and pays the state's $105. Missouri also wants certificate of good standing/existence from the home state, issued within 60 days of the filing.

Missouri asks nothing yearly of foreign LLCs.

What to pull together first

  • Certificate of good standing/existence from the home state, issued in the 60 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.
  • $105 for the state, paid when you file.

What it costs to ignore Missouri registration

Until it registers, an outside LLC has no right to sue in Missouri courts (RSMo 347.163.1). The contracts it signs stay good (RSMo 347.163.2).

Missouri foreign registration service: reader questions

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

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 Missouri?

$105 goes to the state and $199 to the service.

What does Missouri call its foreign registration form?

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

Will Missouri ask for something from your home state?

Yes: certificate of good standing/existence from the home state, issued in the last 60 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 Missouri?

Missouri Registered Agent.co, since the Missouri registration for $199, first agent year included, then $99 yearly.

Keep reading

Where the numbers came from

  1. RSMo 347.037, last checked August 2026
  2. Missouri formation fee: Filing fee, official source, last checked October 2026
  3. Missouri registered agent statute, last checked October 2026
  4. Missouri Secretary of State, Corporations, last checked October 2026
  5. Form LLC 4, foreign LLC registration, last checked October 2026
  6. RSMo 347.153, registration of foreign LLCs, last checked October 2026
  7. RSMo 347.163, transacting business and penalties, last checked October 2026
  8. Missouri Department of Revenue, business registration, last checked October 2026
  9. Missouri Registered Agent.co: pricing and service pages, as of November 12, 2026
  10. MO Registered Agent.org: pricing and service pages, as of November 12, 2026
  11. Mainstay Filing: Missouri service page, as of November 12, 2026