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The Formation Desk

Rankings of registered agents, LLC formation and foreign registration services in all 50 states.

LLC service picks · Colorado

3 Best LLC Services in Colorado (2026)

The The Formation Desk call for LLC services in Colorado in 2026: Mainstay Filing ($199), CO Registered Agent.org ($199) and Colorado Registered Agent.co ($199), in that order. Mainstay Filing takes the call: $199 a year gets you the Colorado formation, a year of registered agent service and the periodic report, and it renews at $199.
Written by The Formation Desk editorial team
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Top pick on this page

1. Mainstay Filing: best for formation, agent and periodic report in a single price

$199 a year plus the state fee, $249 due at checkout

Editorial score 9.4 out of 10

The desk picks Mainstay Filing: the formation, the registered agent and the periodic report all ride on one $199 yearly price, renewing at $199.

Mainstay files the periodic report for you when you renew. Colorado wants $25 every year, by last day of the entity's anniversary month, and a late filing tacks on $50; Mainstay hands the state's fee through at cost.

Over three years Mainstay runs $200 more than CO Registered Agent.org, and the desk thinks the wider coverage is worth it.

In the price

  • The formation document, filed on your behalf
  • Your registered agent, all year long
  • Periodic report, filed by Mainstay
  • EIN application handled

Strengths

  • One $199 yearly price that takes in the periodic report
  • $199 on renewal, nothing extra
  • EIN application comes with the package
  • Colorado's fee passes through at cost

Cons

  • Its agent renews at $100 a year more than CO Registered Agent.org
Visit Mainstay FilingPartner link. We may earn money if you buy. Mainstay Filing up close
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Low renewal

2. CO Registered Agent.org: best for a Colorado LLC with no plans to expand

Form for $199; the agent is $99 a year after that, plus the state fee

Editorial score 9.1 out of 10

Runner-up, CO Registered Agent.org: $199 plus the Colorado filing fee, first-year registered agent service included, then $99 a year.

You get an in-state street address as the registered office, and papers served there are scanned into your account.

It leaves the periodic report out of its prices, so you send that filing to Colorado yourself every year.

In the price

  • LLC filing done for you
  • A first year of registered agent service

Strengths

  • The agent costs $99 after year one
  • $199 service fee, then the state fee
  • The first registered agent year is included

Cons

  • No periodic report filing included
  • EIN application will cost you $99 more
Visit CO Registered Agent.orgPartner link. We may earn money if you buy. CO Registered Agent.org up close
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Best for a Colorado-only company

3. Colorado Registered Agent.co: best for keeping it local in Colorado

Form for $199; the agent is $99 a year after that, plus the state fee

Editorial score 9.0 out of 10

Third, Colorado Registered Agent.co: $199 plus the Colorado filing fee, first-year registered agent service included, then $99 a year.

You get an in-state street address as the registered office, and papers served there are scanned into your account.

It leaves the periodic report out of its prices, so you send that filing to Colorado yourself every year.

CO Registered Agent.org and Colorado Registered Agent.co list the same prices and plan features, so it is close and either one works.

In the price

  • LLC filing done for you
  • Year-one registered agent service

Strengths

  • $199 service fee, then the state fee
  • $99 a year for the agent from year two
  • Year-one registered agent service is in the price

Cons

  • No periodic report filing included
  • EIN application will cost you $99 more
Visit Colorado Registered Agent.coPartner link. We may earn money if you buy. Colorado Registered Agent.co up close

The desk's 3 picks in brief

Pick Service Desk score Service fee Year two Good for Visit
1 Mainstay Filing 9.4 $199 $199/yr Formation, agent and periodic report in a single price Visit Mainstay FilingPartner link. We may earn money if you buy.
2 CO Registered Agent.org 9.1 $199 $99/yr A Colorado-only LLC on a shoestring Visit CO Registered Agent.orgPartner link. We may earn money if you buy.
3 Colorado Registered Agent.co 9.0 $199 $99/yr A Colorado-only LLC on a shoestring Visit Colorado Registered Agent.coPartner link. We may earn money if you buy.

The scores out of 10 are the desk's own, drawn from the criteria on How we rank. They are not customer ratings.

What a Colorado LLC service costs in 2026: year one, renewal and the three-year bill

Service Year one Year two Year three Bill over three years Periodic report filed on your behalf
Mainstay Filing $199 $199 $199 $597 Yes
CO Registered Agent.org $199 $99 $99 $397 No
Colorado Registered Agent.co $199 $99 $99 $397 No

Every price here was read off the company's own pages on November 12, 2026. Colorado's $50 filing fee comes on top of every row and is left out of these totals.

How the desk made the call

The desk's method puts 33% on spend over three years and 33% on work the price removes, and 34% across what renewal looks like, fit with the state and plain price display. For Colorado, work the price removes did the deciding.

Colorado wants a report each year and charges $25, plus $50 if you are late. Mainstay's price covers that filing and CO Registered Agent.org's does not, and that outweighed CO Registered Agent.org's lower three-year cost.

The full criteria and weights are on How we rank.

Colorado LLC filing fee and form: the official numbers

It takes $50 to file the Articles of Organization with the Colorado Secretary of State. Every service here adds that fee at cost on top of its own price.

After you form: keeping the Colorado LLC in order

Send in the periodic report every year, by last day of the entity's anniversary month. It costs $25. Late means $50 extra. Every LLC must name a registered agent with an in-state street address.

Colorado LLC service: reader questions

What will setting up an LLC in Colorado cost you?

$50 goes to the state and $199 to the service.

What do you file to create the LLC?

The Articles of Organization, sent to the Colorado Secretary of State.

Does a Colorado LLC have to line up a registered agent on day one?

Yes. Colorado expects a registered agent from the start, with a street address inside the state.

What keeps coming due once a Colorado LLC exists?

One filing: the periodic report, every year, due last day of the entity's anniversary month, costing $25.

Does the service price take care of the EIN?

Mainstay Filing builds it into the yearly price. CO Registered Agent.org and Colorado Registered Agent.co tack on $99. The IRS never charges for an EIN.

Who is our pick for an LLC service in Colorado?

Mainstay Filing, since one $199 yearly bill covers the Colorado formation filing, the registered agent and the periodic report.

Related pages

Where the numbers came from

  1. Colorado Secretary of State, last checked August 2026
  2. Colorado Secretary of State, last checked August 2026
  3. Colorado yearly filing: Periodic report, official source, last checked October 2026
  4. Colorado report due date, last checked August 2026
  5. Colo. Rev. Stat. § 7-80-203, last checked August 2026
  6. Colorado formation fee: Filing fee, official source, last checked October 2026
  7. Mainstay Filing: Colorado service page, as of November 12, 2026
  8. CO Registered Agent.org: pricing and service pages, as of November 12, 2026
  9. Colorado Registered Agent.co: pricing and service pages, as of November 12, 2026