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Plain CharterLLC questions, short answers.

Answered simply · Missouri

3 Best Foreign Registration Services in Missouri (2026), Plainly Answered

Our 2026 answer for Missouri: Mainstay Filing ($199), Missouri Registered Agent.co ($199) and MO Registered Agent.org ($199), best first. The state's registration fee is $105 with any of them; service fees reach $397 to $497 over three years.

By the Plain Charter editorial team ·

Plainly put

Cost to file
$105
Certificate required?
Yes (60 days maximum age)
Yearly upkeep
No report to file
Best picks
Mainstay Filing, Missouri Registered Agent.co then MO Registered Agent.org

The Missouri picks

Prices come from each company's own pricing. How we choose.
1First choice

1. Mainstay Filing: best for a second state and a third

$199 to register, $149 yearly

We put Mainstay Filing at the top because the registration costs $199 plus state fees, with the registered agent free for year one.

Three years cost $100 more than Missouri Registered Agent.co; reach across states decides it here.

After the free year, the registered agent renews at $149 a year.

The price covers

  • State registration
  • Registered agent, included for year one
  • One price nationwide

Upsides

  • Year-one agent included
  • $199 to register
  • Any state, one fee

What to weigh

  • Renewal $50 above Missouri Registered Agent.co
Visit Mainstay FilingPartner link. We may earn money if you buy.
2Missouri only

2. Missouri Registered Agent.co: best for a budget registration

$199 to register, $99 yearly

Missouri Registered Agent.co comes second: you pay $199 over the state fee, then $99 each year.

The price covers

  • Your foreign filing
  • A year of agent service

Upsides

  • Agent service, year one
  • $99 a year for the agent after
  • $199 to register

What to weigh

  • No coverage outside the state
Visit Missouri Registered Agent.coPartner link. We may earn money if you buy.
3Missouri only

3. MO Registered Agent.org: best for another local option

$199 to register, $99 yearly

MO Registered Agent.org comes third: you pay $199 over the state fee, then $99 each year.

Its prices match Missouri Registered Agent.co exactly, so either is a sound choice.

The price covers

  • Your foreign filing
  • A year of agent service

Upsides

  • $199 to register
  • Agent service, year one
  • $99 a year for the agent after

What to weigh

  • No coverage outside the state
Visit MO Registered Agent.orgPartner link. We may earn money if you buy.

How the picks compare

#ServiceFirst-year priceEach year afterThree yearsCovers
1Mainstay Filing$199$149/yr$497state registration; registered agent, included for year one; one price nationwideVisit Mainstay FilingPartner link. We may earn money if you buy.
2Missouri Registered Agent.co$199$99/yr$397your foreign filing; A year of agent serviceVisit Missouri Registered Agent.coPartner link. We may earn money if you buy.
3MO Registered Agent.org$199$99/yr$397your foreign filing; A year of agent serviceVisit MO Registered Agent.orgPartner link. We may earn money if you buy.
Each company's published prices, November 12, 2026. State fees come on top and do not change by pick.

The plain answers

Does my out-of-state LLC need to register?

An LLC from another state registers before it transacts business in Missouri.

Unregistered, the LLC faces no lawsuits as plaintiff (RSMo 347.163.1).

October 2026 · dor.mo.gov

How much is foreign registration?

$105 to the state, plus $199 with a service.

Over three years the state's fees reach $105, counting any recurring report. October 2026 · sos.mo.gov

What is the application called?

Just one document: the Application for Registration of a Foreign Limited Liability Company (Form LLC 4), submitted to the Missouri Secretary of State, Corporations Division.

Add certificate of good standing/existence from the home state from the last 60 days.

What comes due after registering?

No report follows the registration.

Why these three?

It comes down to what the price takes off your plate, where Mainstay Filing is strongest.

We start with three-year cost (35%), then what the price takes off your plate (30%).

Your home state needs an agent too; one account that covers both is simpler.

Read our criteria

The official requirements

WhatAnswerFrom
Application fee$105October 2026 · sos.mo.gov
Proof of existenceYes, 60 daysOctober 2026 · dor.mo.gov
Paid to the state by year 3$105Our sum of the fees above
Three-year state total = filing + reports in years 2 and 3 + any minimum tax; variable costs are not added.

A few more questions

What about the home state?

The home state rules still apply there. A provider in every state, such as Mainstay Filing, can cover both.

Three years in, what has each cost?

Mainstay Filing $497, Missouri Registered Agent.co $397 and MO Registered Agent.org $397, plus state fees.

What sources do you use?

Official schedules for state fees, company pricing for service fees, all dated on this page.

Is a service required by law?

It is optional; the state charges the same either way.

Who files the registration?

Yes. Each pick here files it for you; the state fee is the same either way.

Who is your first choice in Missouri?

Mainstay Filing, because it charges $199 on top of the state fee and includes the registered agent free for the first year, then $149 a year. Then Missouri Registered Agent.co and MO Registered Agent.org.

Official sources and prices

  1. RSMo 347.037, August 2026 (revisor.mo.gov)
  2. Missouri formation fee: Filing fee, October 2026 (sos.mo.gov)
  3. Missouri registered agent statute, October 2026 (revisor.mo.gov)
  4. Missouri Secretary of State, Corporations, October 2026 (sos.mo.gov)
  5. Form LLC 4, foreign LLC, October 2026 (sos.mo.gov)
  6. RSMo 347.153, registration of foreign, October 2026 (revisor.mo.gov)
  7. RSMo 347.163, transacting business and, October 2026 (revisor.mo.gov)
  8. Missouri Department of Revenue, business, October 2026 (dor.mo.gov)
  9. Prices from the Mainstay Filing Missouri service page on November 12, 2026
  10. Prices from the Missouri Registered Agent.co pricing page on November 12, 2026
  11. Prices from the MO Registered Agent.org pricing page on November 12, 2026