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Plain CharterLLC questions, short answers.

No legalese · Missouri

3 Best LLC Services in Missouri (2026), Plainly Answered

We'd pick Missouri Registered Agent.co ($199), Mainstay Filing ($199) and MO Registered Agent.org ($199) in Missouri for 2026, in that order. The state's filing fee is $50 no matter who files. Service fees over three years: $397 to $597.

By the Plain Charter editorial team ·

Plainly put

Fee to form
$50, at filing
Ongoing state fees
No yearly report
Registered agent
Must have one
Who we'd use
Missouri Registered Agent.co, Mainstay Filing then MO Registered Agent.org

Who to use in Missouri

Our order, explained on how we choose.
1Best overall

1. Missouri Registered Agent.co: best for a small first-year bill

First year $199, then $99 a year

First choice: Missouri Registered Agent.co. The reason is simple: formation costs $199 and the yearly agent renewal is $99.

Over three years it costs less than Mainstay Filing, and cost is the biggest factor in our order.

The price covers

  • Your LLC filed
  • Agent included, year one

Upsides

  • Agent free for year one
  • Then $99 yearly
  • $199 to form

What to weigh

  • EIN help is $99 more
Visit Missouri Registered Agent.coPartner link. We may earn money if you buy.
2Nationwide

2. Mainstay Filing: best for a predictable yearly bill

$199 a year plus the $50 state fee

Mainstay Filing comes second: $199 a year, the same at renewal, pays for formation and the registered agent.

Over three years it is $200 dearer than Missouri Registered Agent.co.

The price covers

  • The formation filing
  • Registered agent year-round
  • Applying for your EIN
  • State fee passed through

Upsides

  • $199 a year covers filing and agent
  • Applies for your EIN
  • Renewal stays $199

What to weigh

  • $100 a year more than Missouri Registered Agent.co from year two
  • Missouri has no recurring report
Visit Mainstay FilingPartner link. We may earn money if you buy.
3Local choice

3. MO Registered Agent.org: best for another local option

First year $199, then $99 a year

Our number 3 is MO Registered Agent.org, since formation costs $199 and the yearly agent renewal is $99.

Its prices match Missouri Registered Agent.co exactly, so either is a sound choice.

The price covers

  • Your LLC filed
  • Agent included, year one

Upsides

  • Then $99 yearly
  • $199 to form
  • Agent free for year one

What to weigh

  • EIN help is $99 more
Visit MO Registered Agent.orgPartner link. We may earn money if you buy.

How the picks compare

#ServiceYear oneYear two onThree yearsIn the price
1Missouri Registered Agent.co$199$99/yr$397Your LLC filed; agent included, year oneVisit Missouri Registered Agent.coPartner link. We may earn money if you buy.
2Mainstay Filing$199$199/yr$597the formation filing; Registered agent year-round; Applying for your EINVisit Mainstay FilingPartner link. We may earn money if you buy.
3MO Registered Agent.org$199$99/yr$397Your LLC filed; agent included, year oneVisit MO Registered Agent.orgPartner link. We may earn money if you buy.
Read from company pricing on November 12, 2026; three years means the first year plus two renewals.

Your questions

What does it cost to form an LLC here?

$50 to the state, plus $199 if a service files it for you.

By year three you will have paid the state $50. source: sos.mo.gov, October 2026

What do I file, and where?

It takes one filing, the Articles of Organization (Form LLC-1), which goes to the Missouri Secretary of State.

source: sos.mo.gov, October 2026

Do I need a registered agent?

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

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

source: revisor.mo.gov, October 2026

What recurs after formation?

There is no recurring LLC report here.

Can I do it without a service?

You can. Without a service you pay just the state: $50 across three years.

A service adds $397 to $597 over three years for doing the filings.

How did you rank them?

Three-year cost (35% of our weighting) put Missouri Registered Agent.co first.

What we weigh most: three-year cost (35%) and what the price takes off your plate (30%). Three smaller criteria break close calls.

$397 over three years for Missouri Registered Agent.co, which is $200 under Mainstay Filing.

See how we rank

The official requirements

RequirementAnswerOfficial source
Fee to form$50source: sos.mo.gov, October 2026
Registered agentMust have onesource: revisor.mo.gov, October 2026
State fees, first three years$50Our sum of the fees above
Filing fee, the reports in years two and three, then any minimum tax: that is the three-year line.

More answers

What about the EIN?

EIN help costs $99 with Missouri Registered Agent.co or $99 with MO Registered Agent.org, and nothing extra with Mainstay Filing.

What is the three-year cost of each?

Missouri Registered Agent.co $397, Mainstay Filing $597 and MO Registered Agent.org $397, state fees extra.

Are the fees official?

Official Missouri sources for state fees, company price pages for service fees.

Is a service required by law?

No. The state accepts filings from owners; a service saves time and handles the agent role.

What does the LLC owe the state yearly?

There is no recurring LLC report here.

Who comes first in Missouri?

We rank Missouri Registered Agent.co first on three-year cost, with Mainstay Filing and MO Registered Agent.org behind it.

Where these answers come from

  1. revisor.mo.gov · RSMo 347.037 · August 2026
  2. sos.mo.gov · Missouri formation fee: Filing fee · October 2026
  3. revisor.mo.gov · Missouri registered agent statute · October 2026
  4. November 12, 2026: Missouri Registered Agent.co pricing page
  5. November 12, 2026: Mainstay Filing Missouri service page
  6. November 12, 2026: MO Registered Agent.org pricing page