3 Best Foreign Registration Services in Colorado (2026): The Straight Story
If you need foreign registration services in Colorado in 2026, here's the order we'd go in: Mainstay Filing ($199), CO Registered Agent.org ($199) and Colorado Registered Agent.co ($199). Colorado charges $100 to register no matter who files, and services add $397 to $497 over three years.
Straight from the LLC Straight Talk editorial team
The short of it
The short of it
State fee to register
$100
Certificate from home?
Nope
Afterward
$25, periodic report
Who we'd use
Mainstay Filing, CO Registered Agent.org then Colorado Registered Agent.co
Colorado: our ranking
The order comes from our five tests: three-year cost first, then what the price covers.
#1Our top pick
1. Mainstay Filing: best for registering in several states
$199 to register, $149 a year for the agent after
Mainstay Filing is who we'd use first in Colorado, because it's $199 to register, with a free first registered agent year and $149 a year from then on.
You'd save $100 over three years with CO Registered Agent.org, as long as the LLC never leaves Colorado.
Skip the registered agent charge in year one. Afterward expect $149 a year in every state.
What you get
Registration, start to finish
Registered agent, waived for the first year
A flat fee in every state
Pluses
Service fee of $199
No registered agent fee in year one
Same fee in every state
What's not
$50 more a year for the agent
#2Colorado only
2. CO Registered Agent.org: best for adding this state and no others
$199 to register, $99 a year for the agent after
$199 files the registration, and from year two the agent's $99. That puts CO Registered Agent.org second.
What you get
Registration filed
The first agent year's on them
Pluses
Service fee of $199
Agent renews at $99
A free agent year at the start
What's not
Two states, two providers
#3Colorado only
3. Colorado Registered Agent.co: best for another in-state choice
$199 to register, $99 a year for the agent after
$199 files the registration, and from year two the agent's $99. That puts Colorado Registered Agent.co third.
It charges what CO Registered Agent.org charges.
What you get
Registration filed
The first agent year's on them
Pluses
Agent renews at $99
Service fee of $199
A free agent year at the start
What's not
Two states, two providers
The numbers
#
Company
Year one
Each year after
3 years
What you get
1
Mainstay Filing
$199
$149/yr
$497
Registration, start to finish; registered agent, waived for the first year; A flat fee in every state
Service fees only, from each company's prices on November 13, 2026. State fees are the same whoever you pick.
What you need to know
When does an out-of-state LLC have to register?
Do it first, sell second: an LLC from elsewhere signs up with the Colorado Secretary of State, Business Program before taking its first Colorado customer.
Over three years the state's fees reach $150, counting any recurring report. go check coloradosos.gov, last confirmed October 2026
Which form, and who gets it?
You file the Statement of Foreign Entity Authority with the Colorado Secretary of State, Business Program, and that single filing registers the LLC.
You don't need a good standing certificate from home.
What do I owe once I'm registered?
Next up is the periodic report, at $25.
Per the state, it's due once a year, by the end of the second month after your report month.
Why this order?
Mainstay Filing takes jobs the price actually covers, which counts 30%.
We run five tests: money out the door in three years (35%), jobs the price actually covers (30%), no hunting for the price (14%), no surprise at renewal (11%) and where it works (10%).
An out-of-state LLC already works in two states, and the first pick can cover both.
Want to check the total? Add the filing fee, the next two reports and any minimum tax. We don't count costs without a set amount.
More questions
Do I still need an agent at home?
Each state sets its own rule, so keep an agent at home too. A provider that works in every state, like Mainstay Filing, can handle both.
What's the three-year damage for each?
Mainstay Filing will set you back $497, and CO Registered Agent.org will set you back $397, and Colorado Registered Agent.co will set you back $397, with state fees on top.
Are the fees official?
Official Colorado sources back the state side, and posted prices back the service side.
Is a service required?
No. You can file with the state yourself. A service saves you time and can be your agent, but nothing makes you hire one.
Will a service file it for me?
Each company on this page files it for you.
Who should I use for a foreign registration service in Colorado?
Go with Mainstay Filing first, then look at CO Registered Agent.org and Colorado Registered Agent.co.