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Founder Mentor Guide

Mentor notes 2 · Missouri

Missouri Registered Agent Walkthrough (2026): 6 Stages and the 3 Best Agents

For naming a registered agent in Missouri in 2026, our mentors would send you to Mainstay Filing ($149 a year), Missouri Registered Agent.co ($99 a year) and MO Registered Agent.org ($99 a year), in that order. 6 quick stages cover the rule, who qualifies, the address test and the paperwork.

Advice from the Founder Mentor Guide mentors

Walkthrough snapshot

Do you need a registered agent?
Yes
Official page: revisor.mo.gov (viewed October 2026)
What recommended services charge
$99 to $149 a year
As each company lists them
How many stages
6
In order

What you will get from this walkthrough

  • The Missouri agent rule
  • Eligibility and address rules
  • Getting the agent listed
  • The agents at the top of the list

If you would rather hand it off

The mentors' five criteria are on how we score, and they decide the order.

Our call

1. Mainstay Filing: best for a nationwide agent at one price

Number one pick$149 a year, $149 when it renews

If you only phone one company, make it Mainstay Filing, because a steady $149 per year, with nothing to change if you move into another state.

Compared with Missouri Registered Agent.co, you spend $150 more over three years and file less yourself.

What you get

  • A registered office in Missouri
  • Papers served on the company are scanned for you, no charge
  • Up to three government mailings a year are scanned for free
  • Also works for nonprofits, corporations, LPs and LLPs

What works

  • $149 a year, same at renewal
  • Good in every state

What to watch

  • $50 a year above Missouri Registered Agent.co
  • Reports remain your job
Visit Mainstay FilingPartner link. We may earn money if you buy.

Our call

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

Local choice$99 a year, $99 when it renews

Pick number 2 is Missouri Registered Agent.co, where $99 yearly, and scans of served papers land in an online account.

What you get

  • A physical address in Missouri
  • Legal papers scanned and posted

What works

  • Under Mainstay Filing on price
  • $99 each year, no increase

What to watch

  • Only works in Missouri; any other state needs its own agent
Visit Missouri Registered Agent.coPartner link. We may earn money if you buy.

Our call

3. MO Registered Agent.org: best for an in-state mailing address

Local choice$99 a year, $99 when it renews

Pick number 3 is MO Registered Agent.org, where $99 yearly, and scans of served papers land in an online account.

Missouri Registered Agent.co and this service cost the same.

What you get

  • A physical address in Missouri
  • Legal papers scanned and posted

What works

  • $99 each year, no increase
  • Under Mainstay Filing on price

What to watch

  • Only works in Missouri; any other state needs its own agent
Visit MO Registered Agent.orgPartner link. We may earn money if you buy.

3 services, compared

#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.
Company prices as listed on November 13, 2026. No agent moves the state fees.

The stages

  1. Stage 1

    Begin with the rule

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

    Check it yourself: Official page: revisor.mo.gov (viewed October 2026)

  2. Stage 2

    Check who may take the job

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

  3. Stage 3

    Learn what counts as a registered office

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

    The record shows the service's address instead of yours.

  4. Stage 4

    Be your own agent or hire one

    Owners who meet the tests can name themselves, and for the rest the recommended agents start at $99 to $149 each year.

  5. Stage 5

    Name the agent in the filing

    A Missouri LLC that is just being formed names its agent on the Articles of Organization (Form LLC-1). Any later switch is its own filing at the Missouri Secretary of State.

    Check it yourself: Official page: sos.mo.gov (viewed October 2026)

  6. Stage 6

    Keep the agent record accurate

    The state wants no yearly report, but a registered agent has to stay in place.

What this walkthrough costs

EntryPayeePrice
Agent serviceThe provider$99 to $149 a year
Agent renewalThe provider$99 to $149 a year
The state's fees come from official pages, listed below. Over three years they add up to the filing, two reports and, in a few states, a minimum tax.

Why the list runs this way

edged out on work taken off your desk, which counts for 32%.

A single agent for every state topped the one-state plan.

Missouri questions

Is having a registered agent the law in Missouri?

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

Can I be my own registered agent?

Often. Run the two tests in stages 2 and 3.

Can I change my registered agent later?

Yes; the Missouri Secretary of State takes change filings, and stage 5 says what to send.

What does a registered agent cost in Missouri?

$99 to $149 per year for the agents listed.

What does the LLC pay the state each year?

No yearly report fee.

Which registered agent would you choose?

Go with Mainstay Filing: you pay $149 a year here and the identical amount in any state you add later. Then Missouri Registered Agent.co and MO Registered Agent.org.

Where we got the facts

  1. Where the RSMo 347.037 advice comes from: revisor.mo.gov, viewed August 2026.
  2. Where the Missouri formation fee: Filing fee, official source advice comes from: sos.mo.gov, viewed October 2026.
  3. Where the Missouri registered agent statute advice comes from: revisor.mo.gov, viewed October 2026.
  4. November 13, 2026, Missouri service page belonging to Mainstay Filing
  5. November 13, 2026, pricing page belonging to Missouri Registered Agent.co
  6. November 13, 2026, pricing page belonging to MO Registered Agent.org