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Founder Primer

LLC paperwork, boiled down for founders.

Primer 2 · Missouri

Missouri Registered Agent Primer (2026): 6 Moves and the 3 Best Agents

Short answer for Missouri, 2026: use Mainstay Filing ($149 a year), MO Registered Agent.org ($99 a year) and Missouri Registered Agent.co ($99 a year), ranked best to worst, if you want help appointing a registered agent. Make the 6 moves below and your registered agent is set up properly.
From the Founder Primer desk

Start here

Registered agent required?
Yes
revisor.mo.gov, read October 2026
Yearly cost of our picks
$99 to $149 a year
Company price pages
How many moves
6
Each one explained

Primer goals

  • What Missouri requires of a registered agent
  • The address and eligibility rules
  • Recording the agent
  • Who we would hire as agent

If you want someone else to file

Five weighted criteria set the order (see how we score); three-year cost and to-dos cleared count most.

Our pick $149 yearly, then $149

1. Mainstay Filing: best for founders planning to grow

We start with Mainstay Filing: a flat $149 a year, whatever state the LLC is in.

MO Registered Agent.org is $150 cheaper over three years; this one still places higher because it does more of the work.

Inside the price
  • A registered office in Missouri
  • Served papers scanned free, the same business day
  • Three government letters a year scanned at no charge
  • Also serves nonprofits, corporations, LPs and LLPs
In its favor
  • $149 annually
  • Covers all fifty states
Against it
  • Pricier by $50 a year
  • You still file reports yourself
Visit Mainstay Filing Partner link. We may earn money if you buy.
Local option $99 yearly, then $99

2. MO Registered Agent.org: best for founders based in the state

MO Registered Agent.org is a fair second choice: an in-state street address for the registered office, $99 a year.

Inside the price
  • A real Missouri address
  • Online copies of served documents
In its favor
  • Under Mainstay Filing on price
  • $99; renews at $99
Against it
  • Missouri only; other states need their own agent
Visit MO Registered Agent.org Partner link. We may earn money if you buy.
Local option $99 yearly, then $99

3. Missouri Registered Agent.co: best for a local backup

Missouri Registered Agent.co is a fair third choice: an in-state street address for the registered office, $99 a year.

MO Registered Agent.org and this service charge alike.

Inside the price
  • A real Missouri address
  • Online copies of served documents
In its favor
  • Under Mainstay Filing on price
  • $99; renews at $99
Against it
  • Missouri only; other states need their own agent
Visit Missouri Registered Agent.co Partner link. We may earn money if you buy.

Marks and prices together

# Service Annual price Renewal price Three-year total
1 Mainstay Filing $149 $149/yr $447 Visit Mainstay Filing Partner link. We may earn money if you buy.
2 MO Registered Agent.org $99 $99/yr $297 Visit MO Registered Agent.org Partner link. We may earn money if you buy.
3 Missouri Registered Agent.co $99 $99/yr $297 Visit Missouri Registered Agent.co Partner link. We may earn money if you buy.

Posted prices, read November 13, 2026. The state bills the same whichever agent you name.

The Missouri agent, in order

  1. Move 1

    What Missouri wants from an agent

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

    Where this comes from: revisor.mo.gov, read October 2026

  2. Move 2

    Who qualifies

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

  3. Move 3

    Use an address that qualifies

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

    Hire a service and your home address stays out of public view.

  4. Move 4

    Self-serve or professional

    An eligible owner may serve. Otherwise our recommended agents run $99 to $149 a year.

  5. Move 5

    List the agent publicly

    A new LLC names its agent on the Articles of Organization (Form LLC-1), filed with the Missouri Secretary of State. An LLC that changes agents files an amendment there.

    Where this comes from: sos.mo.gov, read October 2026

  6. Move 6

    Keep the details accurate

    No yearly report here. Keep the registered agent current.

Agent and state costs

Cost item Recipient Cost
Registered agent service Your service $99 to $149 a year
Renewing the agent Your service $99 to $149 a year

Filing plus the reports in years two and three plus any minimum tax: that is the state's three-year total. Sources are listed below.

How the marks came out

won on to-dos the price takes off you (38% of the mark), with close behind.

Reach put it ahead of MO Registered Agent.org.

Common questions

Can a Missouri LLC skip a registered agent?

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 moves 2 and 3.

Can I change my registered agent later?

Change whenever you like through the Missouri Secretary of State, as move 5 describes.

What does a registered agent cost in Missouri?

Prices here run $99 to $149 a year.

What does the LLC pay the state each year?

No yearly report fee.

Which registered agent would you choose?

Our order: Mainstay Filing, MO Registered Agent.org and Missouri Registered Agent.co. Mainstay Filing leads because $149 a year, and the plan still works if you add a state later.

Next primer

Sources, so you can check us

  1. Backup for the RSMo 347.037 section: revisor.mo.gov, read August 2026.
  2. Backup for the Missouri formation fee: Filing fee, official source section: sos.mo.gov, read October 2026.
  3. Backup for the Missouri registered agent statute section: revisor.mo.gov, read October 2026.
  4. Mainstay Filing: Missouri service page, read on November 13, 2026
  5. MO Registered Agent.org: pricing page, read on November 13, 2026
  6. Missouri Registered Agent.co: pricing page, read on November 13, 2026