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Formation ClassClass is in session: LLC paperwork, state by state.

Class 2 · Missouri

Missouri Registered Agent Class (2026): 6 Assignments and the 3 Best Agents

Today's class on getting a registered agent in Missouri in 2026 comes with one answer: hire Missouri Registered Agent.co ($99 a year), MO Registered Agent.org ($99 a year) and Mainstay Filing ($149 a year), in that order. 6 assignments cover the rule, who is eligible, the address test and the filing.

Taught by the Formation Class faculty

Read this first

The requirementYesCheck the textbook page: revisor.mo.gov (read October 2026)
Yearly cost of the graded agents$99 to $149 a yearAs each company lists them
How many assignments6Listed below

Class goals

  • What the law says
  • Who may serve and from what address
  • How an agent gets on record
  • The agents we picked

Missouri: the graded services

Three-year tuition and homework done weigh the most; how we grade lists all five criteria.
Best overall

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

$99 per year (renews at $99)

We start with Missouri Registered Agent.co; $99 a year, unchanged at renewal, for an LLC that stays in the state.

Over three years it costs less than Mainstay Filing, and three-year tuition is 30% of the grade.

Covered by the tuition

  • A Missouri street address
  • Served papers are scanned into your account

Strengths

  • Under Mainstay Filing on price
  • A flat $99 yearly

Weak spots

  • Another state means another agent
Local choice

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

$99 per year (renews at $99)

Second place goes to MO Registered Agent.org, since $99 a year, unchanged at renewal, for an LLC that stays in the state.

It charges exactly what Missouri Registered Agent.co charges.

Covered by the tuition

  • A Missouri street address
  • Served papers are scanned into your account

Strengths

  • A flat $99 yearly
  • Under Mainstay Filing on price

Weak spots

  • Another state means another agent
Does most of the work

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

$149 per year (renews at $149)

Mainstay Filing lands in third place: a flat $149 a year, whichever state the LLC sits in.

Add up three years: it comes to $150 more than Missouri Registered Agent.co.

Covered by the tuition

  • A Missouri street address for the record
  • Scans of papers served on the company, free and on the same business day
  • Three government letters a year are scanned free
  • Also serves nonprofits, corporations, LPs and LLPs

Strengths

  • Good in every state
  • $149 each year, no increase

Weak spots

  • $50 a year above Missouri Registered Agent.co
  • Report filing needs the formation package

Grades and prices together

#ServiceAnnual priceRenewal priceThree-year total
1Missouri Registered Agent.co$99$99/yr$297Visit Missouri Registered Agent.coPartner link. We may earn money if you buy.
2MO Registered Agent.org$99$99/yr$297Visit MO Registered Agent.orgPartner link. We may earn money if you buy.
3Mainstay Filing$149$149/yr$447Visit Mainstay FilingPartner link. We may earn money if you buy.
Each company's posted price on November 13, 2026. Switching agents does not change what the state charges.

The assignments

  1. Assignment
    1

    Read what Missouri requires

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

    Textbook page: Check the textbook page: revisor.mo.gov (read October 2026)

  2. Assignment
    2

    Who counts as an agent

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

  3. Assignment
    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.

    Paying a service keeps your home address out of public records.

  4. Assignment
    4

    Choose between acting alone and hiring

    Qualify and you can serve yourself. A professional from the grade list runs $99 to $149 per year.

  5. Assignment
    5

    Put the agent on the state's record

    The Articles of Organization (Form LLC-1) asks for the agent's name and address, and the Missouri Secretary of State also takes change filings from LLCs that switch agents.

    Textbook page: Check the textbook page: sos.mo.gov (read October 2026)

  6. Assignment
    6

    Track the recurring filing

    There is nothing yearly to file here; the registered agent is what you keep fresh.

The bill

What forPaid toAmount
Agent serviceYour service$99 to $149 a year
RenewalYour service$99 to $149 a year
Anything paid to Missouri is an official fee you can look up on the pages listed below. The three-year row combines the filing, two later reports and a minimum tax where there is one, and service prices are not part of it.

The reasoning behind the grades

What decided it was tuition across three years, which carries 30% of the grade.

Three years with Missouri Registered Agent.co add up to $297, which is $150 under Mainstay Filing.

Common questions

Is a registered agent required in Missouri?

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

Can I be my own registered agent?

Yes, when you meet the who-may-serve and address rules in assignments 2 and 3.

Can I change my registered agent later?

Yes. A switch takes a change filing at the Missouri Secretary of State (assignment 5).

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 report fee is due.

Which registered agent would you choose?

Missouri Registered Agent.co, MO Registered Agent.org and Mainstay Filing, from the highest grade to the lowest.

Related classes

Textbook pages and extra reading

  1. Class notes on RSMo 347.037 come straight from revisor.mo.gov (reread August 2026).
  2. Class notes on Missouri formation fee: Filing fee, official source come straight from sos.mo.gov (reread October 2026).
  3. Class notes on Missouri registered agent statute come straight from revisor.mo.gov (reread October 2026).
  4. Missouri Registered Agent.co's pricing page, read on November 13, 2026
  5. MO Registered Agent.org's pricing page, read on November 13, 2026
  6. Mainstay Filing's Missouri service page, read on November 13, 2026