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Plain talk · Missouri

3 Best LLC Services in Missouri (2026), Plainly

For LLC formation services in Missouri, here is our 2026 ranking: Mainstay Filing ($199), Missouri Registered Agent.co ($199) and MO Registered Agent.org ($199). Everyone pays the state the same $50, and the service fees come to $397 to $597 for three years.
From the LLC Plainly editorial team

In a nutshell

You pay the state
$50, once
Later on
Nothing to file
Registered agent
Yes, you must
Who we like
Mainstay Filing, Missouri Registered Agent.co then MO Registered Agent.org

Our Missouri picks

Ranked best first using the checks on our method page.
Best overall

1. Mainstay Filing: best for a bill you can predict

$199 a year plus $50 for the state

Number one is Mainstay Filing, since $199 a year forms your LLC and puts a registered agent in place, and it throws in the EIN application.

Over three years you'd pay $200 more than with Missouri Registered Agent.co, and that buys service in every state.

Your money buys

  • LLC formation handled for you
  • Registered agent for the full year
  • EIN handled
  • State fees passed on at cost

The good

  • $199 each year buys everything on this list
  • No surprise at renewal: $199
  • EIN taken care of

Trade-offs

  • After year one it costs $100 more a year
  • You get less from the bundle here
Missouri specialist

2. Missouri Registered Agent.co: best for a tight budget

Pay $199 now and $99 each year later, state fee extra

Number 2 is Missouri Registered Agent.co: $199 gets you formed, and the agent renews each year at $99.

Your money buys

  • LLC filing handled
  • Agent included for year one

The good

  • $99 a year from year two
  • Year one of the agent comes with it
  • A $199 formation fee, plus the state fee

Trade-offs

  • Getting an EIN costs $99 more
Missouri specialist

3. MO Registered Agent.org: best for a second in-state filer

Pay $199 now and $99 each year later, state fee extra

Number 3 is MO Registered Agent.org: $199 gets you formed, and the agent renews each year at $99.

The same published prices as Missouri Registered Agent.co, so go with whichever you like.

Your money buys

  • LLC filing handled
  • Agent included for year one

The good

  • $99 a year from year two
  • A $199 formation fee, plus the state fee
  • Year one of the agent comes with it

Trade-offs

  • Getting an EIN costs $99 more

Compared

#CompanyYear oneRenews atThree-year totalWhat you get
1Mainstay Filing$199$199/yr$597LLC formation handled for you; registered agent for the full year; EIN handledCheck out Mainstay FilingPartner link. We may earn money if you buy.
2Missouri Registered Agent.co$199$99/yr$397LLC filing handled; agent included for year oneCheck out Missouri Registered Agent.coPartner link. We may earn money if you buy.
3MO Registered Agent.org$199$99/yr$397LLC filing handled; agent included for year oneCheck out MO Registered Agent.orgPartner link. We may earn money if you buy.
These are service fees only, from each company's prices on November 13, 2026. The state's fees are the same whoever you pick.

What you probably want to know

What will it cost me to form an LLC here?

$50 if you file yourself, and $199 more if a service does it.

Add the state's fees from filing through year three: $50. sos.mo.gov, last seen October 2026

What exactly am I filing?

The form is the Articles of Organization (Form LLC-1), and the office is the Missouri Secretary of State.

sos.mo.gov, last seen October 2026

Will the state make me name 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.

revisor.mo.gov, last seen October 2026

What does it cost to keep an LLC going?

No report falls due.

Do I have to pay a service at all?

Nothing stops you from filing yourself, and then the three-year bill is $50 in state fees.

Expect $397 to $597 over three years if you hire.

What's behind the ranking?

Mainstay Filing is strongest on work taken off your hands, which counts for 31% of our score.

Five checks set the order: cost across three years (33%), work taken off your hands (31%), prices stated clearly (14%), renewal price (12%) and where it works (10%).

It's a close call: filing and agent for one yearly price.

Read the method

Missouri: the rules, cited

The ruleDetailsWhere we found it
Cost to form the LLC$50sos.mo.gov, last seen October 2026
Registered agentYes, you mustrevisor.mo.gov, last seen October 2026
What the state gets in three years$50Added from the rows
The bottom row isn't a state figure. It's our total of the filing fee, the next two reports and the minimum tax, if the state has one.

FAQ

Who gets my EIN?

You'd pay $99 at Missouri Registered Agent.co or $99 at MO Registered Agent.org, and nothing extra at Mainstay Filing.

What does each one cost over three years?

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

Can I check these fees?

Missouri's fee schedules and forms for state costs; each company's price page for service costs.

Is hiring help required?

You can skip it. The state's fee is the same whichever way you file.

What shows up on the calendar each year?

No report falls due.

What's the best LLC service for Missouri?

Mainstay Filing comes first: for $199 a year you get the filing and a registered agent, plus the EIN application. Then come Missouri Registered Agent.co and MO Registered Agent.org.

Sources, with dates

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