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Formation Scorecard

Registered agent scorecard · Colorado

3 Best Registered Agents in Colorado (2026)

On the Formation Scorecard 2026 scorecard for registered agents in Colorado the order reads Colorado Registered Agent.co ($99 a year), Mainstay Filing ($149 a year) and CO Registered Agent.org ($99 a year). Colorado Registered Agent.co posts the top score: a Colorado specialist at $99 a year that supplies an in-state registered office street address.
Researched and written by the Formation Scorecard editorial team
Rank #1 Our top pick in Colorado

1. Colorado Registered Agent.co: best for the lowest yearly rate on this list

9.2 Editor score out of 10
$99 a year, no change on renewal

Colorado Registered Agent.co leads the card: $99 a year, flat, with scans of served legal papers delivered online.

Colorado Registered Agent.co puts a street address in the state on record for the company and scans served papers into your account.

Over three years it is the cheaper option next to Mainstay Filing, and cost carries top weight.

What you get

  • A state street address serving as the registered office
  • Legal papers served on the company are scanned and sent to your online account

Strengths

  • Offers formation with a free first agent year
  • Yearly price of $99 that holds at renewal
  • Undercuts Mainstay Filing on yearly price

Watch for

  • You file the periodic report yourself
  • Limited to Colorado; other states need another agent
Visit Colorado Registered Agent.coPartner link. We may earn money if you buy. Colorado Registered Agent.co: the full write-up
Rank #2 One agent, every state

2. Mainstay Filing: best for every state

8.9 Editor score out of 10
$149 a year, no change on renewal

Mainstay Filing takes second spot: $149 yearly for an agent that fits a company in one state or in fifty, with the first three government mailings each year scanned free.

Not formed yet? Mainstay's $199-a-year formation package covers the Colorado filing along with the periodic report.

Colorado Registered Agent.co undercuts Mainstay Filing by $150 over three years, and that gap costs Mainstay points on cost.

What you get

  • A physical registered office address in the state
  • No-cost scan and upload of served papers within the same business day
  • Three government mailings a year scanned without charge
  • Compliance reminders

Strengths

  • Fits LLCs, corporations, LPs, LLPs and nonprofits
  • First three government mailings each year scanned free
  • $149 a year with no renewal step-up
  • Served papers scanned on the day they arrive, free

Watch for

  • Agent service alone costs $50 a year more than Colorado Registered Agent.co
  • The agent plan does not file annual reports
Visit Mainstay FilingPartner link. We may earn money if you buy. Mainstay Filing: the full write-up
Rank #3 Local Colorado agent

3. CO Registered Agent.org: best for Colorado-based companies

8.7 Editor score out of 10
$99 a year, no change on renewal

CO Registered Agent.org takes third spot: $99 a year, flat, with scans of served legal papers delivered online.

The registered office comes from CO Registered Agent.org as an in-state address, with scans of served documents sent to your account.

CO Registered Agent.org mirrors Colorado Registered Agent.co on price and plan features, so little divides them.

What you get

  • A state street address serving as the registered office
  • Scans of served documents appear in your account online

Strengths

  • Forms LLCs too, with year-one agent service free
  • A cheaper yearly plan than Mainstay Filing's
  • $99 annually, same when it renews

Watch for

  • You file the periodic report yourself
  • Limited to Colorado; other states need another agent
Visit CO Registered Agent.orgPartner link. We may earn money if you buy. CO Registered Agent.org: the full write-up

The 3 entries on one card

Place Service Card score Yearly cost Renews at Best for Go
1 Colorado Registered Agent.co 9.2 $99 $99/yr The lowest yearly price we rank here Visit Colorado Registered Agent.coPartner link. We may earn money if you buy.
2 Mainstay Filing 8.9 $149 $149/yr An agent for every state Visit Mainstay FilingPartner link. We may earn money if you buy.
3 CO Registered Agent.org 8.7 $99 $99/yr The lowest yearly price we rank here Visit CO Registered Agent.orgPartner link. We may earn money if you buy.

Formation Scorecard assigns each mark out of 10 itself, using the weighted criteria on How we rank. No customer ratings feed in.

Colorado registered agent cost in 2026: first year, renewal and the three-year tally

Service First year Second year Third year Three-year tally Holds its price at renewal
Colorado Registered Agent.co $99 $99 $99 $297 Yes
Mainstay Filing $149 $149 $149 $447 Yes
CO Registered Agent.org $99 $99 $99 $297 Yes

Each price comes from the company's own site, read on November 12, 2026. Colorado charges its own fees the same way whichever agent you name.

Why the order falls this way

Cost across three years decided the Colorado card. The method puts 25% on cost across three years and 25% on coverage of the price, then shares 50% among renewal terms, state-by-state fit and pricing clarity.

Colorado Registered Agent.co tallies $297 across three years, $150 below Mainstay Filing. If Colorado is the only state, fifty-state coverage adds little, and the lower yearly price takes the points.

Every criterion and weight appears on How we rank.

What Colorado Secretary of State requires of a Colorado registered agent (official)

Every LLC must name a registered agent with an in-state street address. 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. Statute: C.R.S. § 7-90-701.

The Colorado periodic report: fee, due date and your agent

Colorado LLCs file the periodic report every year. The fee is $25 and the date is last day of the entity's anniversary month. Filing late means $50 more. The state sends related notices to your registered agent.

Colorado registered agent: quick questions

Is a Colorado LLC obliged to keep a registered agent?

It is. Colorado wants every LLC to have a registered agent on file, and that agent must hold a street address inside the state.

What is the going yearly rate for a registered agent in Colorado?

Yearly prices span $99 to $149, and each service holds its price when it renews.

Is it allowed to serve as my own registered agent?

Yes, if you satisfy the state's conditions. 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.

When must the Colorado periodic report be filed?

The deadline is last day of the entity's anniversary month. The state's fee is $25. A late filing is penalized with $50.

Which registered agents sit on this card?

Colorado Registered Agent.co ($99 a year), Mainstay Filing ($149 a year) and CO Registered Agent.org ($99 a year), top to bottom.

Which Colorado registered agent scores best on value?

Colorado Registered Agent.co, since $99 a year, steady at renewal, and the lowest yearly price on this list.

More from us

Where the figures come from

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