3 Best Foreign Registration Services in Missouri (2026), No Fluff
Our 2026 ranking of foreign registration services in Missouri runs Mainstay Filing ($199), MO Registered Agent.org ($199) and Missouri Registered Agent.co ($199). Here's the money: $105 to the state, $397 to $497 to a service across three years.
Straight from the LLC Straight Talk editorial team
The short of it
The short of it
What the state charges to register
$105
Bring a home-state certificate?
Yes (60 day age cap)
Once you're registered
Nothing to file
Our pick
Mainstay Filing, MO Registered Agent.org then Missouri Registered Agent.co
1. Mainstay Filing: best for adding states down the road
$199 plus the state fee, then $149 a year
There's one fee, $199, whatever state you're registering in, and the registered agent is waived for the first year. That's why Mainstay Filing is first.
Here's the catch: MO Registered Agent.org costs $100 less over three years, but it only works in Missouri.
You don't pay for the registered agent the first year. From year two, it's $149 annually wherever you registered.
What you get
Your registration filed for you
Registered agent, waived for the first year
The same fee no matter the state
Pluses
Same fee in every state
Agent's free the first year
Service fee of $199
What's not
Renewal's $50 over MO Registered Agent.org
#2Missouri only
2. MO Registered Agent.org: best for adding this state and no others
$199 plus the state fee, then $99 a year
MO Registered Agent.org comes in second because you'll pay $199 over the state fee and get the agent free for year one, then $99 a year.
What you get
Missouri registration filing
Agent service covered for year one
Pluses
Agent renews at $99
Year one of the agent comes with it
$199 to register
What's not
Nothing outside this state
#3Missouri only
3. Missouri Registered Agent.co: best for another in-state choice
$199 plus the state fee, then $99 a year
Missouri Registered Agent.co comes in third because you'll pay $199 over the state fee and get the agent free for year one, then $99 a year.
It charges what MO Registered Agent.org charges.
What you get
Missouri registration filing
Agent service covered for year one
Pluses
Agent renews at $99
$199 to register
Year one of the agent comes with it
What's not
Nothing outside this state
The numbers
#
Company
Year one
Each year after
3 years
What you get
1
Mainstay Filing
$199
$149/yr
$497
your registration filed for you; registered agent, waived for the first year; the same fee no matter the state
Add three years of state fees, registration included, and you're at $105. go check sos.mo.gov, last confirmed October 2026
What registers the LLC?
Once the Missouri Secretary of State, Corporations Division accepts the Application for Registration of a Foreign Limited Liability Company (Form LLC 4), your LLC is registered.
Attach certificate of good standing/existence from the home state issued within the last 60 days.
Is there a filing that repeats?
No yearly report applies.
Why this order?
On jobs the price actually covers (30% of the score), Mainstay Filing wins.
Two tests carry most of the weight: money out the door in three years (35%) and jobs the price actually covers (30%).
With two states in play, a provider that covers every state beat MO Registered Agent.org.
Every line above links to the state's own page. The total's ours: the filing, two reports and any minimum tax.
Still wondering?
Do I still need an agent at home?
Yes. Your home state has its own agent rule, and Mainstay Filing can cover both states from one account.
What do the picks cost over three years?
Mainstay Filing comes out at $497; MO Registered Agent.org comes out at $397; Missouri Registered Agent.co comes out at $397, with state fees on top.
Where do these numbers come from?
Official Missouri sources back the state side, and posted prices back the service side.
Do I have to use a service?
No law says you need a service. It's a convenience you pay for.
Will a service file it for me?
All of them do, so the service fee's the only difference.
What's the best foreign registration service in Missouri?
Mainstay Filing is first: Missouri's fee plus $199 gets you registered, and nobody bills you for the registered agent until year two. Then comes MO Registered Agent.org and Missouri Registered Agent.co.