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LLC 101 Guide

Unit 2 · Missouri

The Missouri Registered Agent Unit (2026): 6 Tasks and the 3 Best Agents

Mainstay Filing ($149 a year), Missouri Registered Agent.co ($99 a year) and MO Registered Agent.org ($99 a year): that is the order of the services we would hire in Missouri in 2026 for naming a registered agent. Work through the 6 tasks and your registered agent will be appointed the right way.

Prepared by the LLC 101 Guide instructors

Key facts for this unit

Must you have one?
Yes
Taken from revisor.mo.gov in October 2026
Agent price range
$99 to $149 a year
From company pricing pages
How many tasks
6
Listed below

By the end you will know

  • What the law says
  • Who can act as agent
  • Getting the agent listed
  • The agents we picked

The Missouri honor roll

Graded on the grading page: three-year cost (34%), assignments completed (31%), renewal price, fit with Missouri's rules and plain pricing.

Top of the class

1. Mainstay Filing: best for owners planning to expand

Highest grade$149 yearly, $149 at renewal

In Missouri, Mainstay Filing leads the class: an agent for $149 a year who can follow the company wherever it registers next.

Three years run $150 higher than with Missouri Registered Agent.co, but it completes more of the assignments, and the grade pays for that.

What the price covers

  • An office address inside the state
  • Free scans of legal papers served on the company, sent the business day they arrive
  • Up to three government letters a year are scanned free
  • Also works for nonprofits, corporations, LPs and LLPs

What works

  • Works in all fifty states
  • $149 each year, no increase

What to weigh

  • Higher by $50 a year
  • This plan does not file your reports
Visit Mainstay FilingPartner link. We may earn money if you buy.

Top of the class

2. Missouri Registered Agent.co: best for owners based in the state

Local choice$99 yearly, $99 at renewal

Second goes to Missouri Registered Agent.co, since $99 a year with no bump at renewal, a good match for an LLC that stays in one state.

What the price covers

  • A registered office address
  • Served papers are scanned into your account

What works

  • Under Mainstay Filing on price
  • $99 a year, same at renewal

What to weigh

  • A single-state service
Visit Missouri Registered Agent.coPartner link. We may earn money if you buy.

Top of the class

3. MO Registered Agent.org: best for staying inside one state

Local choice$99 yearly, $99 at renewal

Third goes to MO Registered Agent.org, since $99 a year with no bump at renewal, a good match for an LLC that stays in one state.

On price, it is level with Missouri Registered Agent.co.

What the price covers

  • A registered office address
  • Served papers are scanned into your account

What works

  • $99 a year, same at renewal
  • Under Mainstay Filing on price

What to weigh

  • A single-state service
Visit MO Registered Agent.orgPartner link. We may earn money if you buy.

A comparison of the services

#ServiceAnnual priceRenewal priceThree-year total
1Mainstay Filing$149$149/yr$447Visit Mainstay FilingPartner link. We may earn money if you buy.
2Missouri Registered Agent.co$99$99/yr$297Visit Missouri Registered Agent.coPartner link. We may earn money if you buy.
3MO Registered Agent.org$99$99/yr$297Visit MO Registered Agent.orgPartner link. We may earn money if you buy.
Taken from each company's price page on November 13, 2026. Every agent leaves the state fees unchanged.

The Missouri agent, in order

  1. Task 1

    Start with the legal rule

    Every LLC must name a registered agent with an in-state street address.

    Source: Taken from revisor.mo.gov in October 2026

  2. Task 2

    See who may act

    A Missouri resident, or a corporation authorized in Missouri, whose business office is the registered office. The rule comes from RSMo 347.030.

  3. Task 3

    The address rule

    The address has to be a physical street address in Missouri. A P.O. box can be listed only together with a street address.

    A service gives you a Missouri street address so yours stays off the filing.

  4. Task 4

    Decide who will hold the role

    If you pass the tests above you can name yourself; hiring one of the recommended agents costs $99 to $149 a year.

  5. Task 5

    Name the agent in your filing

    You identify the agent in your filing with the Missouri Secretary of State, and any change is its own filing at that office.

    Source: Taken from sos.mo.gov in October 2026

  6. Task 6

    Keep the agent record accurate

    Missouri has no recurring LLC report, so the registered agent is the only item to keep current.

What this unit costs

What forPayeeAmount
Registered agent serviceThe service$99 to $149 a year
Agent renewalThe service$99 to $149 a year
State fees were read from the official pages named in the sources. Three years means the filing, two years of reports and the minimum tax where there is one.

Why the list runs this way

Assignments the price completes makes up 31% of the grade, and that is where got ahead in Missouri.

One agent for any state beat the one-state plan.

Short answers

Must a Missouri LLC maintain a registered agent?

Yes. Every LLC must name a registered agent with an in-state street address.

Can I be my own registered agent?

Maybe. Read tasks 2 and 3 and see whether you meet both rules.

Can I change my registered agent later?

Yes. Switching takes a change filing at the Missouri Secretary of State (task 5).

What does a registered agent cost in Missouri?

$99 to $149 a year across our picks.

What does the LLC pay the state each year?

Missouri sets no report fee.

Which registered agent would you choose?

Mainstay Filing is first, Missouri Registered Agent.co and MO Registered Agent.org follow, and Mainstay Filing wins on assignments the price completes.

Reading list and sources

  1. Everything about RSMo 347.037 above traces to revisor.mo.gov, a page we reread in August 2026.
  2. Everything about Missouri formation fee: Filing fee, official source above traces to sos.mo.gov, a page we reread in October 2026.
  3. Everything about Missouri registered agent statute above traces to revisor.mo.gov, a page we reread in October 2026.
  4. Mainstay Filing: Missouri service page, as seen on November 13, 2026
  5. Missouri Registered Agent.co: pricing page, as seen on November 13, 2026
  6. MO Registered Agent.org: pricing page, as seen on November 13, 2026