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LLC UnpackedEvery filing, unpacked: the fee, the form, the catch.

Open it up · Missouri

3 Best Foreign Registration Services in Missouri (2026): Unpacked

Opened up for 2026, the foreign registration services in Missouri rank Mainstay Filing ($199), Missouri Registered Agent.co ($199) and MO Registered Agent.org ($199), best on top. Two parts make up the bill: $105 to register and $397 to $497 to a service over three years.
Unpacked by the LLC Unpacked editorial team

Top layer

Registration fee
$105
Certificate packed in?
Yes, include it (60 day age cap)
Afterward
Nothing to file
Top of the stack
Mainstay Filing, Missouri Registered Agent.co then MO Registered Agent.org

Missouri: ranked

Curious about the order? The method is here.
Top of the stack

1. Mainstay Filing: best for registering in many states

$199 to register; agent renewal $149

What puts Mainstay Filing first: the price is $199 in every state, and the first registered agent year is inside it.

Missouri Registered Agent.co would save $100 across three years if the LLC stays in Missouri.

Year one of the registered agent is inside the price; afterward it is $149 annually.

Inside the price

  • The registration filing, included
  • Registered agent, not charged in year one
  • The same fee in all fifty states

Inside, the good

  • A free first year of agent service
  • Identical fee in every state
  • $199 over the state fee

Inside, the catch

  • Agent renews at $149, $50 above Missouri Registered Agent.co
The Missouri specialist

2. Missouri Registered Agent.co: best for registering in a single place

$199 to register; agent renewal $99

What puts Missouri Registered Agent.co second: registering costs $199 over the state fee, with the agent covered in year one, then $99 a year.

Inside the price

  • Missouri registration filing
  • Agent included in year one

Inside, the good

  • A free agent year at the start
  • Agent renews at $99
  • $199 plus the state fee

Inside, the catch

  • Two states, two providers
The Missouri specialist

3. MO Registered Agent.org: best for another in-state option

$199 to register; agent renewal $99

What puts MO Registered Agent.org third: registering costs $199 over the state fee, with the agent covered in year one, then $99 a year.

Its prices match Missouri Registered Agent.co exactly, so the order between them is close.

Inside the price

  • Missouri registration filing
  • Agent included in year one

Inside, the good

  • A free agent year at the start
  • $199 plus the state fee
  • Agent renews at $99

Inside, the catch

  • Two states, two providers

Side by side

#CompanyYear oneEach year afterTotal, 3 yearsWhat is inside
1Mainstay Filing$199$149/yr$497the registration filing, included; registered agent, not charged in year one; the same fee in all fifty statesOpen Mainstay FilingPartner link. We may earn money if you buy.
2Missouri Registered Agent.co$199$99/yr$397missouri registration filing; agent included in year oneOpen Missouri Registered Agent.coPartner link. We may earn money if you buy.
3MO Registered Agent.org$199$99/yr$397missouri registration filing; agent included in year oneOpen MO Registered Agent.orgPartner link. We may earn money if you buy.
Prices as of November 13, 2026. The state's own fees are in the checklist below.

Opened up, question by question

Does my LLC from another state have to register?

Any LLC formed elsewhere should file its registration with the Missouri Secretary of State, Corporations Division ahead of its first Missouri transaction.

What an unregistered LLC can run into: Missouri's courts stay closed to it as a plaintiff until it registers (RSMo 347.163.1).

dor.mo.gov holds the original, confirmed October 2026

How much does registration cost?

The state charges $105, and a service adds $199.

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

Which form is inside the filing, and where does it go?

The Application for Registration of a Foreign Limited Liability Company (Form LLC 4) is the filing, and the Missouri Secretary of State, Corporations Division receives it.

Pack in certificate of good standing/existence from the home state dated no earlier than 60 days.

What is due after the LLC registers?

Foreign LLCs file no recurring report here.

Why is the stack in this order?

Mainstay Filing wins the what is inside the price layer, which counts 29%.

Five layers set the order: total across three years (34%), what is inside the price (29%), price laid out in the open (14%), how the renewal behaves (12%) and how far it reaches (11%).

With two states in play, a provider for every state outranks Missouri Registered Agent.co.

The five layers

Missouri: the registration checklist

PartWhat is insidePeek at source
Registration fee$105sos.mo.gov holds the original, confirmed October 2026
Certificate from homeYes, include it, 60 daysdor.mo.gov holds the original, confirmed October 2026
State fees, years one to three$105Our total of the rows above
Every row above links to its official source. The final row is our own total of the filing, two reports and any minimum tax.

More boxes to open

Do I still need an agent in my home state?

Most likely. Each state wants an agent of its own, and while a one-state service covers only one of them, Mainstay Filing covers every state.

What do the picks cost over three years?

Mainstay Filing stacks up to $497, Missouri Registered Agent.co stacks up to $397, MO Registered Agent.org stacks up to $397, services only.

Are the fees official?

Official Missouri paperwork stands behind every state fee here, and every service price traces back to the company's own pricing.

Does the law require one?

Not required. The state takes filings from owners.

Will a service file the registration for me?

Yes. You hand over the details and the company files; the state's charge does not change with the company.

Who tops the stack in Missouri?

Mainstay Filing is on top: the fee is $199 on top of Missouri's own, the registered agent is waived at first, and it settles at $149 a year. Under it sit Missouri Registered Agent.co and MO Registered Agent.org.

What the page rests on

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