Who should you hire in Colorado for LLC formation services in 2026: we say Mainstay Filing ($199), Colorado Registered Agent.co ($199) and CO Registered Agent.org ($199), ranked best first. Of the total, $50 is the state's set filing fee and $397 to $597 is three years of service.
By the LLC Answered editorial team
Short version
Short reply
Price of filing
$50, paid up front
Every year after
$25 once every twelve months
Registered agent
Must be named
Hire in this order
Mainstay Filing, Colorado Registered Agent.co then CO Registered Agent.org
Who to hire in Colorado
Order set by our five tests: three-year cost first, then what the price covers.
#1Top reply
1. Mainstay Filing: best for knowing next year's bill ahead of time
$199 yearly ($249 due at signup with the state fee)
Why Mainstay Filing? Simply put, a single $199 yearly price includes the formation, the registered agent and every periodic report.
The $200 gap to Colorado Registered Agent.co over three years pays for jobs you would otherwise do.
It handles each periodic report, adding the $25 the state sets and nothing more.
What is bundled
The LLC formation itself
Registered agent round the year
Periodic report handled each time
EIN application
Official fee at cost
Pluses
Renews at $199
$199 a year covers filing and agent and report
EIN application included
Downsides
Renews $100 higher than Colorado Registered Agent.co
#2Colorado choice
2. Colorado Registered Agent.co: best for a lean launch
$199 at the start, then $99 yearly
Second place: Colorado Registered Agent.co, where year one is $199 and each later year is $99.
The periodic report stays with you.
What is bundled
Articles filed on your behalf
Agent for year one
Pluses
First-year agent comes with it
Then $99 yearly
Formation fee $199
Downsides
The periodic report is yours to file
$99 add-on for the EIN
#3Colorado choice
3. CO Registered Agent.org: best for a low agent renewal
$199 at the start, then $99 yearly
Third place: CO Registered Agent.org, where year one is $199 and each later year is $99.
The periodic report stays with you.
The same published prices as Colorado Registered Agent.co, so choose whichever you prefer.
What is bundled
Articles filed on your behalf
Agent for year one
Pluses
Formation fee $199
Then $99 yearly
First-year agent comes with it
Downsides
The periodic report is yours to file
$99 add-on for the EIN
Numbers at a glance
#
Who
Start price
Renews at
3-year cost
Included
1
Mainstay Filing
$199
$199/yr
$597
The LLC formation itself; registered agent round the year; periodic report handled each time
Every LLC must name a registered agent with an in-state street address.
A person 18 or older whose home or usual place of business is in Colorado (since July 1, 2025 the person has to hold a Colorado driver's license or ID or otherwise verify residency), or a business entity in good standing with a usual place of business in Colorado. The agent has to consent.
Mainstay Filing runs $597, Colorado Registered Agent.co runs $397, CO Registered Agent.org runs $397, with state fees on top.
How do you know these fees?
State side: Colorado's published fee schedules and forms. Service side: the prices each company lists.
Does the law require a service?
You can file yourself if you meet the rules on this page, and the state charges what it charges either way.
What is the best LLC service for Colorado?
Mainstay Filing leads because it is alone on this list in filing the periodic report for you, and that comes inside $199 a year; Colorado Registered Agent.co and CO Registered Agent.org come next.