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Biz Formation Report

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

LLC formation report · Colorado

3 Best LLC Services in Colorado (2026)

By the Biz Formation Report editorial team

Biz Formation Report ranks LLC services in Colorado for 2026 as Mainstay Filing ($199), Colorado Registered Agent.co ($199) and CO Registered Agent.org ($199), in that order. Mainstay Filing earns the top grade: the formation filing, the registered agent and the periodic report come to $199 a year, renewing at $199.

No.1

Our top pick

1. Mainstay Filing: best for formation, agent and periodic report on one invoice

Score9.4out of 10
$199 a year plus the state fee, $249 due at checkout

Top grade, Mainstay Filing: a flat $199 yearly fee takes in the Colorado formation, your registered agent and the periodic report.

The renewal covers the periodic report, which Mainstay files for you. Colorado collects $25 every year, with a deadline of last day of the entity's anniversary month, and a late filing adds $50; Mainstay passes the state's fee through at cost.

Over three years Mainstay costs $200 more than Colorado Registered Agent.co; our grading treats the broader coverage as worth that.

What you get

  • Formation paperwork handled and filed
  • A registered agent for the whole year
  • The periodic report prepared and filed
  • The EIN application

Good

  • Renewal is $199 with no add-ons
  • Includes the EIN application
  • Colorado's state fee is passed through at cost
  • A single $199 yearly price, including the periodic report

Weak spots

  • Its agent renews at $100 a year more than Colorado Registered Agent.co's
Visit Mainstay FilingPartner link. We may earn money if you buy.
Read the Mainstay Filing review
No.2

Best local option

2. Colorado Registered Agent.co: best for a Colorado LLC that expects to stay put

Score8.9out of 10
$199 for formation, then $99 a year for the agent, plus the state fee

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

The plan seats the company at an in-state street address and posts scans of papers served there to your online account.

The periodic report is outside its published prices, so you submit it to Colorado yourself every year.

What you get

  • LLC filing done for you
  • The first year as your registered agent

Good

  • Forms the LLC at $199 plus filing fees
  • Agent at $99 a year after year one
  • The first year as your registered agent is included

Weak spots

  • Does not handle the periodic report
  • The EIN application costs $99 extra
Visit Colorado Registered Agent.coPartner link. We may earn money if you buy.
Read the Colorado Registered Agent.co review
No.3

Best local option

3. CO Registered Agent.org: best for local Colorado formation

Score8.6out of 10
$199 for formation, then $99 a year for the agent, plus the state fee

Third grade, CO Registered Agent.org: $199 plus the Colorado filing fee, year-one registered agent service included, then $99 a year.

The plan seats the company at an in-state street address and posts scans of papers served there to your online account.

The periodic report is outside its published prices, so you submit it to Colorado yourself every year.

The two state services, Colorado Registered Agent.co and CO Registered Agent.org, match on price and features, and the order between them is a narrow call.

What you get

  • LLC filing done for you
  • The first year as your registered agent

Good

  • $99 a year for the agent from year two
  • Forms the LLC at $199 plus filing fees
  • Registered agent service included for year one

Weak spots

  • Does not handle the periodic report
  • The EIN application costs $99 extra
Visit CO Registered Agent.orgPartner link. We may earn money if you buy.
Read the CO Registered Agent.org review

Summary of the 3 grades

RankProviderGradeService feeYear twoBest fitSite
1Mainstay Filing9.4$199$199/yrFormation, agent and periodic report on one invoiceVisit Mainstay FilingPartner link. We may earn money if you buy.
2Colorado Registered Agent.co8.9$199$99/yrA Colorado-only LLC keeping costs downVisit Colorado Registered Agent.coPartner link. We may earn money if you buy.
3CO Registered Agent.org8.6$199$99/yrA Colorado-only LLC keeping costs downVisit CO Registered Agent.orgPartner link. We may earn money if you buy.

Each grade out of 10 comes from Biz Formation Report's editors and the weighted criteria on How we rank; no customer ratings are involved.

Colorado LLC service prices, 2026: year one, renewal and three-year outlay

ProviderYear 1Year 2Year 3Three-year outlayPeriodic report done for you
Mainstay Filing$199$199$199$597Yes
Colorado Registered Agent.co$199$99$99$397No
CO Registered Agent.org$199$99$99$397No

All prices were taken from the companies' own websites on November 12, 2026. Colorado's $50 filing fee is payable on top of each row and is not part of these totals.

The basis for the order

Biz Formation Report grades three-year bill and what the money buys at 32% each, leaving 36% for renewal handling, local rules match and pricing openness. In Colorado, what the money buys settled the order.

Colorado requires a report every year, charging $25, plus $50 if it is late. Mainstay's price includes the filing and Colorado Registered Agent.co's does not, which outweighed Colorado Registered Agent.co's lower three-year cost in the coverage grade.

Every criterion and weight is listed on How we rank.

Colorado LLC filing fee and form, from official sources

The Colorado Secretary of State charges $50 for the Articles of Organization. Each provider here adds that fee at cost on top of its own.

What a Colorado LLC owes after formation

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

Colorado LLC service: common questions

What does Colorado charge to start an LLC, all in?

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

Which document starts the LLC?

the Colorado Secretary of State accepts the Articles of Organization.

Is a registered agent mandatory for a Colorado LLC?

Yes. Colorado requires one, with a physical street address in the state, from the day the LLC exists.

What recurring paperwork follows an LLC in Colorado?

A single item: the periodic report, filed every year (last day of the entity's anniversary month) for $25.

Does the service price cover the EIN?

The Mainstay Filing yearly price covers it. Colorado Registered Agent.co and CO Registered Agent.org list it at $99. The IRS does not charge for issuing an EIN.

What is the best LLC service in Colorado, by our report?

Mainstay Filing: $199 a year buys the Colorado formation, a year as your registered agent and the periodic report filing, then renews at $199.

Related pages

Source notes

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