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Biz Formation Academy

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

Chapter 3 · Missouri

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

The recommended reading for registering an LLC formed elsewhere in Missouri in 2026 is MO Registered Agent.org ($199), Missouri Registered Agent.co ($199) and Mainstay Filing ($199), in that order. Expect 5 sections and one fee of $105.
Written by the Biz Formation Academy editorial board

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Fee to register $105 sos.mo.gov, as published October 2026
Certificate from the state of formation 60 days No older than
Recurring report None Not required
Three-year state cost $105 No service fee included
Sections 5 Taken one at a time

After this chapter you will understand

  • When registration is required
  • The official form and fee
  • The cost of staying registered
  • The recommendations and their reasons

Missouri: the ranked services

Three-year cost and paperwork completed carry the most weight; how we grade lists all five.

1. MO Registered Agent.org: best for adding only Missouri

Best overall
$199 to register, $99 per year afterward

This chapter recommends MO Registered Agent.org above the others, because the registration charge is $199 plus state fees, and the first agent year is already paid.

On three-year cost it undercuts Mainstay Filing, and cost is a large part of the ranking.

Price covers

  • The filing is made for you
  • A year of agent service is built into the price

Advantages

  • $199 plus the state fee
  • Agent covered in year one
  • Then $99 per year

Limitations

  • A separate agent is required at home
Visit MO Registered Agent.org Partner link. We may earn money if you buy.

2. Missouri Registered Agent.co: best for a local filer

Single-state plan
$199 to register, $99 per year afterward

Missouri Registered Agent.co is ranked second: the registration charge is $199 plus state fees, and the first agent year is already paid.

It charges exactly what MO Registered Agent.org charges.

Price covers

  • The filing is made for you
  • A year of agent service is built into the price

Advantages

  • Agent covered in year one
  • $199 plus the state fee
  • Then $99 per year

Limitations

  • A separate agent is required at home
Visit Missouri Registered Agent.co Partner link. We may earn money if you buy.

3. Mainstay Filing: best for companies adding a second state

Any state
$199 to register, $149 per year afterward

Entry number 3 is Mainstay Filing, where registration with Missouri costs $199 over the state fee, with year one of the registered agent included.

MO Registered Agent.org is $100 lower across three years, which keeps this service out of first place.

Beyond year one the agent is billed at $149 a year, whichever state applies.

Price covers

  • Registration paperwork completed
  • The registered agent carries no charge in year one
  • One fee wherever the LLC registers

Advantages

  • One price anywhere
  • The agent is free for the first year
  • $199 above the state fee

Limitations

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

Rankings and prices together

#ServiceFirst yearFrom year twoThree-year total
1 MO Registered Agent.org $199$99/yr$397 Visit MO Registered Agent.org Partner link. We may earn money if you buy.
2 Missouri Registered Agent.co $199$99/yr$397 Visit Missouri Registered Agent.co 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.

Listed prices, consulted November 13, 2026. Each row still owes Missouri's $105 registration fee.

The chapter, section by section

  1. Section 1

    Determine whether registration is required

    Key term: foreign LLC. It is an LLC formed in a different state, and Missouri asks it to register before operating here. An LLC that operates unregistered faces: until registered, the LLC cannot bring suit before Missouri's courts (RSMo 347.163.1) existing contracts keep their force (RSMo 347.163.2)

    Reference: dor.mo.gov, as published October 2026

  2. Section 2

    Collect the document issued by the home state

    Obtain certificate of good standing/existence from the home state, from the preceding 60 days.

    Leave it until the other documents are ready.

  3. Section 3

    Arrange a Missouri registered agent

    Every LLC must name a registered agent with an in-state street address. The address has to be a physical street address in Missouri. A P.O. box can be listed only together with a street address.

    The services listed above supply one.

    Reference: revisor.mo.gov, as published October 2026

  4. Section 4

    Next comes the Application for Registration of a Foreign Limited Liability Company

    To register, deliver the Application for Registration of a Foreign Limited Liability Company (Form LLC 4) to the Missouri Secretary of State, Corporations Division with the $105 fee.

    Reference: sos.mo.gov, as published October 2026

  5. Section 5

    Prepare for the recurring filing

    A foreign LLC files no recurring Missouri report.

Costs section by section

Line itemRecipientSum
Foreign registration Filing office$105
Filing service (optional) The service$199 initially
State total over three years Filing office$105

The three-year state row is computed as the filing fee, plus the report in each of years two and three, plus any yearly minimum tax. Service fees have their own rows.

How the ranking came out

finished ahead of on tuition over three years, which counts for 34%.

MO Registered Agent.org leads the cost criterion at $397 across three years, with Mainstay Filing $100 behind.

Missouri review questions

What does Missouri charge a foreign LLC to register?

$105 in state fees. The services here charge $199 more.

Which form do I file to register?

Look for the Application for Registration of a Foreign Limited Liability Company (Form LLC 4); it is sent to the Missouri Secretary of State, Corporations Division.

Do I need a certificate from my home state?

Yes: certificate of good standing/existence from the home state, issued within 60 days of filing.

What if the LLC does business there without registering?

until registered, the LLC cannot bring suit before Missouri's courts (RSMo 347.163.1) existing contracts keep their force (RSMo 347.163.2)

What is due after registering?

No recurring report for foreign LLCs in Missouri.

Which service should handle the registration?

MO Registered Agent.org, because $199 over the state fee, with year one of the agent covered, then $99 a year. After it come Missouri Registered Agent.co and Mainstay Filing.

Further reading

Bibliography and primary texts

  1. Bibliography entry for the RSMo 347.037 chapter: revisor.mo.gov, consulted August 2026.
  2. Bibliography entry for the Missouri formation fee: Filing fee, official source chapter: sos.mo.gov, consulted October 2026.
  3. Bibliography entry for the Missouri registered agent statute chapter: revisor.mo.gov, consulted October 2026.
  4. Bibliography entry for the Missouri Secretary of State, Corporations chapter: sos.mo.gov, consulted October 2026.
  5. Bibliography entry for the Form LLC 4, foreign LLC registration chapter: sos.mo.gov, consulted October 2026.
  6. Bibliography entry for the RSMo 347.153, registration of foreign LLCs chapter: revisor.mo.gov, consulted October 2026.
  7. Bibliography entry for the RSMo 347.163, transacting business and penalties chapter: revisor.mo.gov, consulted October 2026.
  8. Bibliography entry for the Missouri Department of Revenue, business registration chapter: dor.mo.gov, consulted October 2026.
  9. Prices quoted from the pricing page at MO Registered Agent.org on November 13, 2026
  10. Prices quoted from the pricing page at Missouri Registered Agent.co on November 13, 2026
  11. Prices quoted from the Missouri service page at Mainstay Filing on November 13, 2026