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Founder Primer

LLC paperwork, boiled down for founders.

Primer 1 · Colorado

LLC Formation in Colorado (2026): 7 Moves and the 3 Best LLC Services

Our 2026 marks for starting an LLC in Colorado: CO Registered Agent.org ($199), Mainstay Filing ($199) and Colorado Registered Agent.co ($199), highest first. 7 moves, $50 to the state, then the periodic report every year.
From the Founder Primer desk

At a glance

Charged by the state
$50
Official page: coloradosos.gov (October 2026)
Periodic report
$25 a year
Filing window: last day of the entity's anniversary month
Three years of state fees
$100
No service fees counted
Move count
7
In order

What you get

  • Where and how a Colorado LLC is filed
  • How to meet the registered agent rule
  • The recurring state filing
  • Which services we pick and why

Our picks for Colorado

Three-year cost and to-dos cleared weigh the most. How we score lists all five criteria.

First choice $199 plus fees, then $99 yearly

1. CO Registered Agent.org: best for a low-cost Colorado start

CO Registered Agent.org gets the top mark in Colorado: $199 on top of the state fee, agent free in year one, then $99 a year.

It beats Mainstay Filing on three-year cost, a big part of the score.

Make time for the periodic report every year; it is not in the price.

Inside the price
  • We prepare and file the formation
  • Agent service for year one
In its favor
  • $99 yearly from year two
  • $199 to form
  • A free first agent year
Against it
  • The periodic report stays with you
  • The EIN application costs $99 extra
All fifty states $199 yearly; renewal $199

2. Mainstay Filing: best for one invoice for filing and upkeep

Mainstay Filing lands second: $199 covers formation, the registered agent and the periodic report; year two costs $199.

CO Registered Agent.org is $200 lower over three years, which keeps this one out of first.

It files every periodic report, and the only extra is the state's own $25.

Inside the price
  • We prepare and file the formation
  • Registered agent all year
  • Periodic report filed on time
  • EIN application included
  • Official fee, nothing added
In its favor
  • $199 a year covers filing and agent and report
  • It prepares your EIN application
  • Renews at $199
Against it
  • A $100 yearly premium over CO Registered Agent.org
One-state plan $199 plus fees, then $99 yearly

3. Colorado Registered Agent.co: best for LLCs that stay in Colorado

Number 3 is Colorado Registered Agent.co, where $199 on top of the state fee, agent free in year one, then $99 a year.

Make time for the periodic report every year; it is not in the price.

CO Registered Agent.org and this service charge alike.

Inside the price
  • We prepare and file the formation
  • Agent service for year one
In its favor
  • A free first agent year
  • $199 to form
  • $99 yearly from year two
Against it
  • The periodic report stays with you
  • The EIN application costs $99 extra

The Colorado picks compared

# Service First year From year two Three-year total
1 CO Registered Agent.org $199 $99/yr $397 Visit CO Registered Agent.org Partner link. We may earn money if you buy.
2 Mainstay Filing $199 $199/yr $597 Visit Mainstay Filing Partner link. We may earn money if you buy.
3 Colorado Registered Agent.co $199 $99/yr $397 Visit Colorado Registered Agent.co Partner link. We may earn money if you buy.

Pulled from each company's pricing page on November 13, 2026. Each row still needs Colorado's $50 fee.

The primer, move by move

  1. Move 1

    Make sure the name is yours to use

    A taken name can get the Colorado filing bounced. Run the business search at the Colorado Secretary of State before you do anything else.

    Look up the matching domain at the same time.

  2. Move 2

    Put a registered agent in place

    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.

    The address has to be a physical address in Colorado, either a home or a usual place of business. P.O. boxes are not accepted.

    Every pick above takes the registered agent role.

    Where this comes from: Official page: sos.state.co.us (October 2026)

  3. Move 3

    Do it yourself, or not

    Without a service you pay the state $50, nothing more. Any of our picks adds $199 and handles the paperwork.

  4. Move 4

    Fill in and send the Articles of Organization

    Send the Articles of Organization and $50 to the Colorado Secretary of State. That brings the LLC into being.

    Where this comes from: Official page: coloradosos.gov (October 2026)

  5. Move 5

    Sort out the EIN

    After approval, the IRS can give the LLC a federal tax ID, and the business bank account hinges on it. Hire Mainstay Filing and the EIN application is handled.

  6. Move 6

    Draft the operating agreement

    Who owns what, who decides what: that lives in the operating agreement, an internal paper outside the Colorado filing.

  7. Move 7

    Keep the LLC active

    What repeats is the periodic report ($25, every year, by last day of the entity's anniversary month). Late filings add $50.

    Where this comes from: Official page: coloradosos.gov (October 2026)

What you will pay

Cost item Pay to Figure
Setting up the LLC The state $50
Periodic report The state $25 every year
Late report The state $50
Service fees (optional) Service company $199 in year one
State fees, years one to three The state $100

State amounts are Colorado's official fees (sources below); service prices come from each company's site. Three years of state cost is the filing, the reports in years two and three and any minimum tax.

How the marks came out

won on founder outlay over three years (27% of the mark), with close behind.

Three years with CO Registered Agent.org come to $397, $200 under Mainstay Filing.

Colorado questions

How big is the Colorado formation fee?

$50, per the official fee schedule. Services we rank charge $199 on top.

Which form creates the LLC?

The destination for the Articles of Organization is the Colorado Secretary of State.

Is a registered agent required?

Every LLC must name a registered agent with an in-state street address.

What does Colorado require each year?

The repeating item is the periodic report ($25, every year, due last day of the entity's anniversary month).

Can I form the LLC without a service?

A service is optional. Founders can file with the $50 fee as long as they appoint a registered agent.

Which LLC service should a first-time founder use?

CO Registered Agent.org, since a Colorado formation at $199 with year one of the agent covered, agent renewal $99. Then Mainstay Filing and Colorado Registered Agent.co.

Next primer

Sources, so you can check us

  1. For Colorado Secretary of State the primer cites sos.state.co.us, a page we went back to in August 2026.
  2. For Colorado Secretary of State the primer cites sos.state.co.us, a page we went back to in August 2026.
  3. For Colorado yearly filing: Periodic report, official source the primer cites coloradosos.gov, a page we went back to in October 2026.
  4. For Colorado report due date the primer cites colorado.public.law, a page we went back to in August 2026.
  5. For Colo the primer cites sos.state.co.us, a page we went back to in August 2026.
  6. For Colorado formation fee: Filing fee, official source the primer cites coloradosos.gov, a page we went back to in October 2026.
  7. CO Registered Agent.org: pricing page, read on November 13, 2026
  8. Mainstay Filing: Colorado service page, read on November 13, 2026
  9. Colorado Registered Agent.co: pricing page, read on November 13, 2026