3 Best Foreign Registration Services in Missouri (2026) for You
In 2026, we rank Mainstay Filing ($199), Missouri Registered Agent.co ($199) and MO Registered Agent.org ($199), in that order, as the foreign registration services for Missouri. Set aside $105 for the state and $397 to $497 for services over three years.
By the LLC Answered editorial team
Quick reply
Short reply
Charged by the state
$105
Home-state certificate needed?
Needed (60 day age limit)
What comes next
Nothing to file yearly
Our ranking
Mainstay Filing, Missouri Registered Agent.co then MO Registered Agent.org
Hire these in Missouri
Prices are from each company's own pricing. See how we decide.
#1First choice
1. Mainstay Filing: best for LLCs adding more states
$199 at the start, then $149 yearly
Mainstay Filing comes first, as the $199 fee is identical everywhere, and the first year of registered agent service comes with it.
Over three years it sits $100 above Missouri Registered Agent.co, and the extra pays for service in every state.
The registered agent renews at $149 a year in every state.
What is bundled
Your foreign filing
Registered agent, first year free
Fifty states, one fee
Pluses
$199 over the state fee
Agent service is free for the first year
Any state, one fee
Downsides
Missouri Registered Agent.co renews the agent for $50 less
#2Missouri choice
2. Missouri Registered Agent.co: best for a lean registration
$199 at the start, then $99 yearly
Missouri Registered Agent.co comes next since $199 above the state fee at the start, and $99 yearly after that.
What is bundled
Foreign filing submitted
First-year agent
Pluses
$199 plus the state fee
No agent charge for year one
$99 a year for the agent after
Downsides
One-state service
#3Missouri choice
3. MO Registered Agent.org: best for a second in-state filer
$199 at the start, then $99 yearly
MO Registered Agent.org comes next since $199 above the state fee at the start, and $99 yearly after that.
Price for price it ties Missouri Registered Agent.co.
What is bundled
Foreign filing submitted
First-year agent
Pluses
No agent charge for year one
$199 plus the state fee
$99 a year for the agent after
Downsides
One-state service
Compared in a table
#
Who
Year 1
Later years
3-year cost
Price buys
1
Mainstay Filing
$199
$149/yr
$497
your foreign filing; registered agent, first year free; fifty states, one fee
By year three the state has collected $105. source sos.mo.gov (October 2026) on file
What registers the LLC?
The LLC is registered once the Missouri Secretary of State, Corporations Division accepts the Application for Registration of a Foreign Limited Liability Company (Form LLC 4).
Send certificate of good standing/existence from the home state no older than 60 days.
What do I owe once registered?
Nothing has to be filed regularly.
Why this order?
Because of paperwork covered (29% of the weight): Mainstay Filing is best there.
Five tests set the order: three-year price (36%), paperwork covered (29%), straightforward pricing (15%), renewal behavior (10%) and states served (10%).
Your home state needs an agent too, so one account for both is simpler.
How the total works: filing + report in year two + report in year three + any minimum tax. Open-ended costs are mentioned in the text only.
Short Q&A
Does my home state still want an agent?
You still need one at home. Mainstay Filing works in both states, while a local company works in one.
After three years, what has each cost?
Mainstay Filing runs $497, Missouri Registered Agent.co runs $397, MO Registered Agent.org runs $397, and state fees are separate.
Are the fees official?
State side: Missouri's published fee schedules and forms. Service side: the prices each company lists.
Does the law require a service?
Not at all. Owners can file with the state directly; a service is there to save you the work and to act as agent.
Is filing part of the service?
Every company on this page handles the filing for you; the state charges the same regardless.
Which one do you pick in Missouri?
Mainstay Filing, because you pay $199 plus Missouri's fee, skip the registered agent charge in year one and then pay $149 a year. Then Missouri Registered Agent.co and MO Registered Agent.org.