The short route
Must you have one?
Yes: the state requires it
Official term
Registered agent
Typical service price
$99 to $149 on a yearly basis
Recommended
Mainstay Filing, MO Registered Agent.org then Missouri Registered Agent.co
Recommended in Missouri
The scoring is laid out on this page .
#1
Start here
1. Mainstay Filing: best for multi-state companies
Pay $149 a year; it renews at $149
Mainstay Filing is our first recommendation because one account at $149 a year covers whichever state the LLC registers in.
Choosing MO Registered Agent.org would save $150 over three years, with the limit that it covers one state.
Checklist: what is included
Registered office in the state Free scans of three government mailings per year Serves LLCs, corporations, LPs, LLPs and nonprofits
What works
Flat $149 a year, no change at renewal A single account works in any state
Gaps
MO Registered Agent.org charges $50 less each year Report filing requires the formation package
#2
In-state option
2. MO Registered Agent.org: best for one-state companies
Pay $99 a year; it renews at $99
MO Registered Agent.org is second, because a company that never leaves Missouri pays $297 over three years.
Checklist: what is included
An address in the state Service papers posted online
What works
Beats Mainstay Filing on yearly cost $99 each year with no increase
Gaps
A second state needs a second agent
#3
In-state option
3. Missouri Registered Agent.co: best for owners who prefer a local firm
Pay $99 a year; it renews at $99
Missouri Registered Agent.co is third, because a company that never leaves Missouri pays $297 over three years.
It charges the same as MO Registered Agent.org, so the order between them is a close call.
Checklist: what is included
An address in the state Service papers posted online
What works
$99 each year with no increase Beats Mainstay Filing on yearly cost
Gaps
A second state needs a second agent
Price comparison
We read these prices on November 13, 2026, and three years means year one plus two renewals.
Questions to settle
Must I name a registered agent?
Every LLC must name a registered agent with an in-state street address.
Check the law: RSMo 347.030. revisor.mo.gov , last confirmed October 2026 for this guide
Who qualifies as an agent?
A Missouri resident, or a corporation authorized in Missouri, whose business office is the registered office.
Qualified owners can skip the cost of an agent.
How much does an agent cost?
The recommended services charge $99 to $149 annually; three years cost $297 to $447.
Your agent choice does not alter state fees.
Why does the state want an agent?
When a lawsuit or a state letter reaches the LLC in Missouri, the agent receives it.
Which yearly state charges apply?
No report falls due.
How did you rank them?
Mainstay Filing leads on filing jobs included, which carries 27% of our score.
Five checks set the order: total for three years (37%), filing jobs included (27%), clear price information (13%), year-two price (12%) and state coverage (11%).
If you add a state later, the same agent and price come with you, while MO Registered Agent.org ends at the Missouri border.
Read the method
Missouri: agent requirements, cited
Last row = filing fee + report in year two + report in year three + minimum tax, if any. Variable costs are described in the text, not added.
Key terms here
Registered agent The agent on file with the state, where court papers and government letters for your company are sent.
Service of process How legal papers officially reach the company: they are handed to the agent.
Registered office The in-state street address where your agent can be reached. P.O. boxes generally do not qualify.
Also asked
Is being my own agent allowed?
Usually. Check who qualifies and what address counts, and if you fit, do it yourself.
Where does the agent have to be located?
The address has to be a physical street address in Missouri. A P.O. box can be listed only together with a street address.
What is the three-year cost of each?
$447 for Mainstay Filing, $297 for MO Registered Agent.org, $297 for Missouri Registered Agent.co
What sources do you use?
State-set fees come from Missouri's publications; what services charge comes from the prices they post.
Must I hire anyone?
Hiring is optional. The law requires a filing, not a filer.
Who is your first choice in Missouri?
Mainstay Filing, because $149 a year goes with the company when it adds a state. Then MO Registered Agent.org and Missouri Registered Agent.co.
Sources and price pages
August 2026 check of RSMo 347.037, via revisor.mo.gov
October 2026 check of Missouri formation fee: Filing fee, via sos.mo.gov
October 2026 check of Missouri registered agent statute, via revisor.mo.gov
Prices read November 13, 2026 from the Mainstay Filing Missouri service page
Prices read November 13, 2026 from the MO Registered Agent.org pricing page
Prices read November 13, 2026 from the Missouri Registered Agent.co pricing page