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No jargon · Missouri

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

In Missouri for 2026, we like MO Registered Agent.org ($199), Missouri Registered Agent.co ($199) and Mainstay Filing ($199), ranked from first to last. Everybody pays Missouri $105, and three years of service run $397 to $497.
From the LLC Plainly editorial team

In a nutshell

You pay the state
$105
Home-state paper needed?
Yes, attach it (60 days at most)
Later on
No report
Who we like
MO Registered Agent.org, Missouri Registered Agent.co then Mainstay Filing

Who we'd use in Missouri

Prices come from each company's own pricing. Here's how we pick.
Our favorite

1. MO Registered Agent.org: best for one extra state

Registration is $199 plus the state fee, and the agent is $99 later

Why MO Registered Agent.org? Honestly, $199 over the state fee gets you registered, and renewals run $99.

It's the cheaper of the two over three years, and cost is our first check.

Your money buys

  • The foreign filing, submitted
  • First-year agent comes with it

The good

  • Then $99 a year for the agent
  • A service fee of $199
  • You don't pay for an agent in year one

Trade-offs

  • Works in Missouri alone, so your home state needs its own agent
One-state pick

2. Missouri Registered Agent.co: best for a low agent renewal

Registration is $199 plus the state fee, and the agent is $99 later

Missouri Registered Agent.co comes next since $199 over the state fee gets you registered, and renewals run $99.

The same published prices as MO Registered Agent.org, so go with whichever you like.

Your money buys

  • The foreign filing, submitted
  • First-year agent comes with it

The good

  • Then $99 a year for the agent
  • You don't pay for an agent in year one
  • A service fee of $199

Trade-offs

  • Works in Missouri alone, so your home state needs its own agent
Goes where you go

3. Mainstay Filing: best for the same fee anywhere

Registration is $199 plus the state fee, and the agent is $149 later

Mainstay Filing comes next since you pay $199 plus Missouri's fee, skip the registered agent charge in year one and then pay $149 a year.

At $100 more than MO Registered Agent.org over three years, it lands lower on our list.

The registered agent costs nothing the first year. After that it's $149 a year, in any state.

Your money buys

  • Out-of-state registration handled
  • Registered agent, first year on us
  • A flat nationwide fee

The good

  • First-year agent is on the house
  • One fee for any state
  • A service fee of $199

Trade-offs

  • You'd pay $50 a year more for the agent

How they compare

#WhoYear oneAfter year oneThree-year totalCovers
1MO Registered Agent.org$199$99/yr$397the foreign filing, submitted; First-year agent comes with itTake a look at MO Registered Agent.orgPartner link. We may earn money if you buy.
2Missouri Registered Agent.co$199$99/yr$397the foreign filing, submitted; First-year agent comes with itTake a look at Missouri Registered Agent.coPartner link. We may earn money if you buy.
3Mainstay Filing$199$149/yr$497Out-of-state registration handled; registered agent, first year on us; A flat nationwide feeTake a look at Mainstay FilingPartner link. We may earn money if you buy.
We read these prices on November 13, 2026. Three years means year one plus two renewals.

Straight answers

Is registering required for my out-of-state LLC?

Doing business in Missouri with an LLC formed somewhere else means registering at the start.

Without registration, you may see it can't bring a lawsuit in Missouri until it registers (RSMo 347.163.1).

dor.mo.gov · October 2026 · checked

How much should I put aside to register?

Registering on your own is $105. Add $199 for a service.

Add up the state's fees across three years and it's $105. sos.mo.gov · October 2026 · checked

What's the application called?

You file the Application for Registration of a Foreign Limited Liability Company (Form LLC 4) with the Missouri Secretary of State, Corporations Division. That's the whole filing.

The filing needs certificate of good standing/existence from the home state issued within the last 60 days.

What does staying registered cost?

No yearly report applies.

What put number one on top?

Cost across three years, worth 33%, put MO Registered Agent.org first.

Cost across three years (33%) and work taken off your hands (31%) matter most, and three lighter checks sit behind them.

MO Registered Agent.org's three-year total of $397 undercuts Mainstay Filing by $100.

Our method, in full

Missouri checklist

WhatThe answerWhere we found it
Registration fee$105sos.mo.gov · October 2026 · checked
Document from your home stateYes, attach it, 60 daysdor.mo.gov · October 2026 · checked
Three-year state total$105Added from the rows
How we get the bottom line: filing + report in year two + report in year three + any minimum tax. Open-ended costs are described in the text only.

Also worth knowing

What about my home state?

Most likely yes. A national provider can look after the home state and this one together.

After three years, what have I paid?

Over three years you'd pay $397 at MO Registered Agent.org, $397 at Missouri Registered Agent.co, $497 at Mainstay Filing (services only).

What do the numbers rest on?

Every state fee links to its official page. Every service price is read from the company's own site.

Is hiring help required?

It's your call. You can file on your own if you meet the rules on this page.

Is filing included in what they sell?

They do. What the state charges is fixed, and only the service fee varies.

Who tops the list in Missouri?

MO Registered Agent.org, because registering costs $199 above the state fee and the agent is covered in year one, then $99 a year. After that, Missouri Registered Agent.co and Mainstay Filing.

Where we got this

  1. RSMo 347.037, revisor.mo.gov (confirmed August 2026)
  2. Missouri formation fee: Filing fee, sos.mo.gov (confirmed October 2026)
  3. Missouri registered agent statute, revisor.mo.gov (confirmed October 2026)
  4. Missouri Secretary of State, Corporations, sos.mo.gov (confirmed October 2026)
  5. Form LLC 4, foreign LLC, sos.mo.gov (confirmed October 2026)
  6. RSMo 347.153, registration of foreign, revisor.mo.gov (confirmed October 2026)
  7. RSMo 347.163, transacting business and, revisor.mo.gov (confirmed October 2026)
  8. Missouri Department of Revenue, business, dor.mo.gov (confirmed October 2026)
  9. MO Registered Agent.org pricing page, read November 13, 2026
  10. Missouri Registered Agent.co pricing page, read November 13, 2026
  11. Mainstay Filing Missouri service page, read November 13, 2026