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Biz Formation Report

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

Foreign registration report · Missouri

3 Best Foreign Registration Services in Missouri (2026)

By the Biz Formation Report editorial team

Biz Formation Report ranks foreign registration services in Missouri for 2026 as Mainstay Filing ($199), Missouri Registered Agent.co ($199) and MO Registered Agent.org ($199), in that order. Mainstay Filing earns the top grade: the Missouri registration is filed for $199, and the registered agent is free in year one, then $149 a year.

No.1

Top pick on this page

1. Mainstay Filing: best for companies registered in several states

Score9.5out of 10
$199 service fee, $304 due at checkout with the state fee; the agent is $149 annually from year two

Top grade, Mainstay Filing: $199 added to the state fee in any state, with a year of registered agent service included.

Beyond the free first year, agent service is $149 annually in any state.

Over three years Mainstay costs $100 more than Missouri Registered Agent.co; our grading treats the broader coverage as worth that.

What you get

  • Registration prepared and filed on your behalf
  • A free first registered agent year
  • Free scan-and-upload of served papers within the same business day

Good

  • $199 service fee plus the state's fee
  • One price across all fifty states
  • Served papers scanned within the same business day, free
  • Registered agent at no cost in year one

Weak spots

  • The agent renews at $149, $50 more than Missouri Registered Agent.co
Visit Mainstay FilingPartner link. We may earn money if you buy.
Read the Mainstay Filing review
No.2

Low renewal

2. Missouri Registered Agent.co: best for companies adding Missouri alone

Score9.2out of 10
A $199 service fee and the state fee, then the agent at $99

Second grade, Missouri Registered Agent.co: the Missouri registration for $199 with year-one agent service included, then $99 a year.

The plan seats the company at an in-state street address and posts scans of papers served there to your online account.

What you get

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

Good

  • Registration costs $199 before the state fee
  • Year-one registered agent service is covered
  • Then $99 per year for the agent

Weak spots

  • Serves Missouri only; the home state still needs its own agent
  • The EIN application costs $99 extra
Visit Missouri Registered Agent.coPartner link. We may earn money if you buy.
Read the Missouri Registered Agent.co review
No.3

Best local option

3. MO Registered Agent.org: best for registering in Missouri only

Score8.9out of 10
$199 plus the state fee, then $99 a year for the agent from year two

Third grade, MO Registered Agent.org: the Missouri registration for $199 with year-one agent service included, then $99 a year.

The plan seats the company at an in-state street address and posts scans of papers served there to your online account.

Prices and features do not separate Missouri Registered Agent.co from MO Registered Agent.org; either works.

What you get

  • The registration filing
  • Year-one registered agent service

Good

  • $99 annually to keep the agent
  • Includes a year of registered agent service
  • $199 for registration, plus the state fee

Weak spots

  • Serves Missouri only; the home state still needs its own agent
  • The EIN application costs $99 extra
Visit MO Registered Agent.orgPartner link. We may earn money if you buy.
Read the MO Registered Agent.org review

Summary of the 3 grades

RankProviderGradeService feeYear twoBest fitSite
1Mainstay Filing9.5$199$149/yrCompanies with a presence in several statesVisit Mainstay FilingPartner link. We may earn money if you buy.
2Missouri Registered Agent.co9.2$199$99/yrThe lowest agent renewal we rank hereVisit Missouri Registered Agent.coPartner link. We may earn money if you buy.
3MO Registered Agent.org8.9$199$99/yrThe lowest agent renewal we rank hereVisit MO Registered Agent.orgPartner link. We may earn money if you buy.

The grades are editorial: Biz Formation Report assigns every mark out of 10 using the criteria on How we rank, not customer ratings.

Missouri foreign registration service prices, 2026: year one, renewal and three-year outlay

ProviderYear 1Year 2Year 3Three-year outlayYear-one agent covered
Mainstay Filing$199$149$149$497Free
Missouri Registered Agent.co$199$99$99$397Included
MO Registered Agent.org$199$99$99$397Included

All prices were taken from the companies' own websites on November 12, 2026. Missouri's $105 registration fee is payable on top of each row and is not part of these totals.

Why Mainstay Filing ranks first

Of the grade, 32% rests on three-year bill and 32% on what the money buys; renewal handling, local rules match and pricing openness share the remaining 36%. What the money buys decided Missouri.

Foreign registration always involves two states, and one provider with one price in both graded best on coverage, ahead of Missouri Registered Agent.co.

Every criterion and weight is listed on How we rank.

Missouri foreign LLC registration: fee, document and filing office

To register, the outside company submits the Application for Registration of a Foreign Limited Liability Company (Form LLC 4) to the Missouri Secretary of State, Corporations Division, with a state fee of $105. Missouri also wants certificate of good standing/existence from the home state, dated within 60 days of the filing.

Missouri requires no yearly report from foreign LLCs.

Documents to have on hand

  • Certificate of good standing/existence from the home state, dated within 60 days of filing.
  • The legal name as recorded in the home state, and the date of formation.
  • An in-state registered agent; any provider in this report can serve.
  • Payment of the $105 state fee with the filing.

The cost of skipping Missouri registration

An unregistered foreign LLC has no right to sue in Missouri courts until it registers (RSMo 347.163.1). Its contracts remain enforceable (RSMo 347.163.2).

Missouri foreign registration service: common questions

Must an LLC from another state register with Missouri?

Yes, as soon as it transacts business there. Until then it has no standing to bring a lawsuit in the state's courts.

How much does Missouri foreign registration cost?

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

Which form handles foreign registration with Missouri?

The state names the form in the facts above; it is sent to the Missouri Secretary of State, Corporations Division.

Does Missouri demand proof of good standing from the home state?

Yes. The filing needs certificate of good standing/existence from the home state, issued no more than 60 days ago.

Is a registered agent still needed after foreign registration?

Yes. A registered agent with a street address in the state has to remain on file.

What is the best foreign registration service for Missouri?

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

Keep reading

Source notes

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