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LLC UnpackedEvery filing, unpacked: the fee, the form, the catch.

Open it up · Missouri

3 Best Registered Agents in Missouri (2026): Unpacked

Opened up for 2026, the registered agents in Missouri rank Mainstay Filing ($149 a year), MO Registered Agent.org ($99 a year) and Missouri Registered Agent.co ($99 a year), best on top. Inside the price: $99 to $149 for year one, and $297 to $447 across three years.
Unpacked by the LLC Unpacked editorial team

Four things inside

Required to name one?
Required, yes
Label in the statute
Registered agent
Going price
$99 to $149 a year
Top of the stack
Mainstay Filing, MO Registered Agent.org then Missouri Registered Agent.co

Our Missouri picks, opened up

The order follows our five layers: three-year cost first, then what the price covers.
Top of the stack

1. Mainstay Filing: best for one price in every state

Annual price $149, renewal price $149

What puts Mainstay Filing first: one account at $149 a year covers whichever state the LLC registers in.

The extra $150 over MO Registered Agent.org across three years is what coverage beyond Missouri costs.

Inside the price

  • A street address inside the state
  • Scans of three government mailings a year at no charge
  • Also covers corporations, LPs, LLPs and nonprofits

Inside, the good

  • Follows your LLC to a new state
  • $149 a year, flat at renewal

Inside, the catch

  • $50 a year more than MO Registered Agent.org
  • The yearly report stays with you
Missouri only

2. MO Registered Agent.org: best for one-state businesses

Annual price $99, renewal price $99

What puts MO Registered Agent.org second: inside the price is an agent in the state for $99 a year.

Inside the price

  • An in-state street address
  • Legal papers scanned to your account

Inside, the good

  • A lower annual price than our first pick
  • $99 each year, no increase

Inside, the catch

  • Single-state coverage
Missouri only

3. Missouri Registered Agent.co: best for another in-state option

Annual price $99, renewal price $99

What puts Missouri Registered Agent.co third: inside the price is an agent in the state for $99 a year.

Price for price, a tie with MO Registered Agent.org.

Inside the price

  • An in-state street address
  • Legal papers scanned to your account

Inside, the good

  • A lower annual price than our first pick
  • $99 each year, no increase

Inside, the catch

  • Single-state coverage

Side by side

#PickYear oneRenewalThree-year totalCovers
1Mainstay Filing$149$149/yr$447A street address inside the state; scans of three government mailings a year at no charge; Also covers corporations, LPs, LLPs and nonprofitsSee Mainstay FilingPartner link. We may earn money if you buy.
2MO Registered Agent.org$99$99/yr$297An in-state street address; legal papers scanned to your accountSee MO Registered Agent.orgPartner link. We may earn money if you buy.
3Missouri Registered Agent.co$99$99/yr$297An in-state street address; legal papers scanned to your accountSee Missouri Registered Agent.coPartner link. We may earn money if you buy.
Prices as of November 13, 2026. The state's own fees are in the checklist below.

Layer by layer

Must the LLC name a registered agent?

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

Statute: RSMo 347.030. peek at revisor.mo.gov, confirmed October 2026

Who is allowed to be the agent?

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

If you qualify, you can serve yourself at no cost.

How much does an agent cost?

A year of agent service runs $99 to $149 with our picks, and three years run $297 to $447.

No state fee depends on the agent you name.

Why does the state want an agent?

Court papers and state notices for the company land at the agent's Missouri address first.

What matters is that nothing important sits unnoticed while you are away. What is service of process?

Is anything else due every year?

No report falls due.

What put number one on top?

Mainstay Filing wins the what is inside the price layer, which counts 29%.

Two layers carry most of the weight, total across three years (34%) and what is inside the price (29%).

Only the first pick holds up in all fifty states, and that counts the day the LLC registers elsewhere.

How we open it up

Missouri agent rule, unpacked

PartAmount or rulePeek at source
LLC filing fee$50peek at sos.mo.gov, confirmed October 2026
Registered agentRequired, yespeek at revisor.mo.gov, confirmed October 2026
State fees, years one to three$50The rows above, stacked
Last row = filing fee + two later reports + minimum tax, if the state has one. Variable costs are described in the text, not added.

More boxes to open

May an owner serve as agent?

Yes, if you meet the state's rules on who may serve and on the address, both shown above.

Which addresses does the state accept?

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

How do the three-year totals compare?

Mainstay Filing runs to $447 and MO Registered Agent.org runs to $297 and Missouri Registered Agent.co runs to $297

What do these numbers rest on?

The state-side figures were taken from Missouri's own publications, and the service prices from the price page each company posts. Dates for both appear on this page.

Do I have to use a service?

No. Owners can file with the state directly. A service saves time and can act as agent, but nothing makes you hire one.

What is the best registered agent for Missouri?

Mainstay Filing is on top: $149 a year moves with the company into a new state. Under it sit MO Registered Agent.org and Missouri Registered Agent.co.

What the page rests on

  1. Unpacking RSMo 347.037 led us to revisor.mo.gov, confirmed August 2026, which you can open yourself
  2. Unpacking Missouri formation fee: Filing fee led us to sos.mo.gov, confirmed October 2026, which you can open yourself
  3. Unpacking Missouri registered agent statute led us to revisor.mo.gov, confirmed October 2026, which you can open yourself
  4. Mainstay Filing Missouri service page, read November 13, 2026
  5. MO Registered Agent.org pricing page, read November 13, 2026
  6. Missouri Registered Agent.co pricing page, read November 13, 2026