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Researched and written by the Launchwise Review editorial team
Launchwise Review

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

Launch guide · Colorado · registered agent

3 Best Registered Agents in Colorado (2026)

Researched and written by the Launchwise Review editorial team
For a 2026 launch in Colorado, Launchwise Review grades registered agents this way: Mainstay Filing ($149 a year), Colorado Registered Agent.co ($99 a year) and CO Registered Agent.org ($99 a year). Mainstay Filing earns the top grade here: the price stays $149 a year if you stay put or expand, and your first three government letters each year are scanned free.
1
Our top pick in Colorado

1. Mainstay Filing: best for all fifty states

$149 a year, flat

Our mark 9.2 out of 10

Top grade, Mainstay Filing: $149 a year, still $149 at renewal, and papers served on the company are scanned the same business day at no charge.

Launching a new company? The $199 yearly package also takes care of the Colorado filing and the periodic report.

It runs $150 above Colorado Registered Agent.co across three years; the extra paperwork it handles is worth that to us.

In the price

  • A street address in the state for your registered office
  • Anything served on the company scanned the same business day at no fee
  • Three letters from government offices scanned each year at no charge
  • Compliance reminders

Pros

  • $149 a year and it does not rise
  • Your first three government letters each year are scanned free
  • Works for LLCs, corporations, LPs, LLPs and nonprofits
  • Papers served on the company are scanned the same business day, free

Less good

  • The agent plan alone costs $50 a year more than Colorado Registered Agent.co
  • No annual report filing on the agent-only plan
Visit Mainstay FilingPartner link. We may earn money if you buy.
Read the Mainstay Filing launch review
2
Best local option

2. Colorado Registered Agent.co: best for the smallest annual bill we rank here

$99 a year, flat

Our mark 8.9 out of 10

Next up is Colorado Registered Agent.co: $99 a year, with no jump at renewal, the lowest yearly price on this list.

Colorado Registered Agent.co handles the registered office with a state street address and scans whatever is served there for you.

In the price

  • A physical street address in the state on the public record
  • You get scans of served legal papers online

Pros

  • $99 yearly, held steady at renewal
  • LLC formation with year-one agent service included
  • A lower yearly price than Mainstay Filing

Less good

  • You still file the periodic report
  • Made for Colorado; other states need their own agent
Visit Colorado Registered Agent.coPartner link. We may earn money if you buy.
Read the Colorado Registered Agent.co launch review
3
Built for Colorado

3. CO Registered Agent.org: best for Colorado specialists

$99 a year, flat

Our mark 8.7 out of 10

Rounding out the list is CO Registered Agent.org: $99 a year, with no jump at renewal, the lowest yearly price on this list.

With CO Registered Agent.org, the registered office sits at a real in-state address and served papers show up in your account as scans.

CO Registered Agent.org copies Colorado Registered Agent.co on price and features, so the pair is close to level.

In the price

  • A physical street address in the state on the public record
  • Papers served on the company are scanned and sent to your account

Pros

  • A $99 yearly plan with a steady renewal price
  • Beats Mainstay Filing on yearly cost
  • Also forms LLCs, first agent year free

Less good

  • You still file the periodic report
  • Made for Colorado; other states need their own agent
Visit CO Registered Agent.orgPartner link. We may earn money if you buy.
Read the CO Registered Agent.org launch review

The 3 grades at a glance

Place Company Launch grade Per year At renewal Best fit Go
1 Mainstay Filing 9.2 $149 $149/yr An agent for every state you may enter Visit Mainstay FilingPartner link. We may earn money if you buy.
2 Colorado Registered Agent.co 8.9 $99 $99/yr The lowest yearly price among the picks we rank here Visit Colorado Registered Agent.coPartner link. We may earn money if you buy.
3 CO Registered Agent.org 8.7 $99 $99/yr The lowest yearly price among the picks we rank here Visit CO Registered Agent.orgPartner link. We may earn money if you buy.
The 10-point grades are editorial, built from the criteria on How we rank. They are not customer ratings.

Colorado registered agent cost in 2026: first year, renewals, three-year total

Company Year 1 Year 2 Year 3 Three years, total Renewal price matches
Mainstay Filing $149 $149 $149 $447 Yes
Colorado Registered Agent.co $99 $99 $99 $297 Yes
CO Registered Agent.org $99 $99 $99 $297 Yes
Prices were copied from each company's own pages on November 12, 2026. Colorado's own fees do not change with your choice of agent.

What drove the grades

What made the call in Colorado was launch paperwork handled. The grading method sets cost to launch and stay at 26%, launch paperwork handled at 26% and renewal behavior, state match and price transparency at 48% combined.

Mainstay's plan covers more ground: papers served on the company are scanned the same business day at no charge, the price is the same in all fifty states, and three government letters a year are scanned free. Colorado Registered Agent.co costs less, and the grades are close.

Every criterion and weight is listed on How we rank.

Colorado registered agent rules, straight from Colorado Secretary of State

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. Law behind it: C.R.S. § 7-90-701.

Colorado periodic report: date and fee

Put the periodic report on your Colorado calendar every year. Count on a $25 state charge, with the deadline at last day of the entity's anniversary month. Miss it and $50 gets added. Your registered agent receives the state's notices about it.

Quick answers about Colorado registered agents

Do I have to line up a registered agent before launching a Colorado LLC?

Yes. Put a registered agent with a physical Colorado address on the paperwork, because the state will not accept an LLC without one.

What should I budget each year for a Colorado registered agent?

Expect $99 to $149 a year, and each company keeps its price at renewal.

Could I just serve as my own registered agent?

Often yes, if you meet 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 does the Colorado periodic report come due?

Put last day of the entity's anniversary month on your calendar. The state asks $25, and a late filing adds $50.

Which registered agents are graded on this page?

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

Which Colorado registered agent should a new company pick first?

Mainstay Filing, because one agent plan at $149 a year that works in every state, renewing at $149.

Related pages

Sources and dates

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