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LLC UnpackedEvery filing, unpacked: the fee, the form, the catch.

Open it up · Colorado

3 Best Foreign Registration Services in Colorado (2026), Opened Up

Opened up for 2026, the foreign registration services in Colorado rank Colorado Registered Agent.co ($199), Mainstay Filing ($199) and CO Registered Agent.org ($199), best on top. Every option pays the state $100, then services total $397 to $497 across three years.
Unpacked by the LLC Unpacked editorial team

Four things inside

State fee to register
$100
Certificate packed in?
Not needed
Once registered
$25, periodic report
Our pick
Colorado Registered Agent.co, Mainstay Filing then CO Registered Agent.org

Colorado: ranked

Prices come from each company's own page. See how we open it up.
Top of the stack

1. Colorado Registered Agent.co: best for adding only this state

$199 to register; agent renewal $99

What puts Colorado Registered Agent.co first: $199 gets the registration filed, and the agent renews at $99.

Its three-year cost is below Mainstay Filing's, and cost is the heaviest layer.

Inside the price

  • Colorado registration filing
  • A first year of agent service

Inside, the good

  • Agent renews at $99
  • $199 over the state fee
  • A first year of agent service is inside

Inside, the catch

  • Two states, two providers
All fifty states

2. Mainstay Filing: best for registering in many states

$199 to register; agent renewal $149

What puts Mainstay Filing second: $199 over the state fee registers you, with the registered agent not charged in year one and $149 a year after.

A $100 three-year gap to Colorado Registered Agent.co explains the lower spot.

The registered agent is not charged in year one and costs $149 a year after that, in any state.

Inside the price

  • The registration filing, included
  • Registered agent, not charged in year one
  • One fee, any state

Inside, the good

  • $199 over the state fee
  • Identical fee in every state
  • The first agent year is inside

Inside, the catch

  • Renewal $50 over Colorado Registered Agent.co
The Colorado specialist

3. CO Registered Agent.org: best for another in-state option

$199 to register; agent renewal $99

CO Registered Agent.org sits third because $199 gets the registration filed, and the agent renews at $99.

Its prices match Colorado Registered Agent.co exactly, so the order between them is close.

Inside the price

  • Colorado registration filing
  • A first year of agent service

Inside, the good

  • $199 over the state fee
  • Agent renews at $99
  • A first year of agent service is inside

Inside, the catch

  • Two states, two providers

Side by side

#PickOpening priceEach year afterTotal, 3 yearsCovers
1Colorado Registered Agent.co$199$99/yr$397colorado registration filing; A first year of agent serviceSee Colorado Registered Agent.coPartner link. We may earn money if you buy.
2Mainstay Filing$199$149/yr$497the registration filing, included; registered agent, not charged in year one; one fee, any stateSee Mainstay FilingPartner link. We may earn money if you buy.
3CO Registered Agent.org$199$99/yr$397colorado registration filing; A first year of agent serviceSee CO Registered Agent.orgPartner link. We may earn money if you buy.
Service fees only, from company prices read November 13, 2026. State fees are the same whichever pick you open.

Opened up, question by question

When must an out-of-state LLC register here?

Registration sits at the front of the line for an out-of-state LLC heading into Colorado.

Inside the risk of skipping it: penalties as high as $5,000.

peek at coloradosos.gov, confirmed October 2026

What is inside the cost of registering?

The state charges $100, and a service adds $199.

Three years of state fees, registration included, stack up to $150. peek at coloradosos.gov, confirmed October 2026

What registers the LLC?

The Statement of Foreign Entity Authority is the filing, and the Colorado Secretary of State, Business Program receives it.

The state does not list a good standing certificate among its requirements.

What is due after the LLC registers?

Next in the box: the periodic report, at $25.

In the state's words, the date is once a year, by the end of the second month after your report month.

Why is the stack in this order?

Colorado Registered Agent.co wins the total across three years layer, which counts 34%.

Five layers set the order: total across three years (34%), what is inside the price (29%), price laid out in the open (14%), how the renewal behaves (12%) and how far it reaches (11%).

Open Colorado Registered Agent.co instead of Mainstay Filing and keep $100 across three years.

How we open it up

What Colorado requires to register

RequirementAmount or rulePeek at source
Registration fee$100peek at coloradosos.gov, confirmed October 2026
Certificate from homeNot neededpeek at coloradosos.gov, confirmed October 2026
Periodic report$25peek at coloradosos.gov, confirmed October 2026
What the state collects in three years$150Our total of the rows above
The last row stacks the filing fee, the reports in years two and three and any minimum tax. A cost with no fixed amount, such as a newspaper notice, is explained above and kept out of the sum.

Also worth asking

Does the home state need its own agent?

Expect to appoint one in each state. A company that operates nationwide, Mainstay Filing for instance, can fill both roles.

What do the picks cost over three years?

Opened up over three years: Colorado Registered Agent.co at $397, Mainstay Filing at $497, CO Registered Agent.org at $397, services only.

What do these numbers rest on?

The state-side figures were taken from Colorado's own publications, and the service prices from the price page each company posts. Dates for both appear on this page.

Do I have to use a service?

No law requires a service. It is a paid convenience.

Can I hire someone to register the LLC?

Each company here handles the filing itself. What differs between them is only the service fee, since the state charges the same.

What is the best foreign registration service for Colorado?

Open Colorado Registered Agent.co first, then compare Mainstay Filing and CO Registered Agent.org.

Originals behind this page

  1. Unpacking Colorado Secretary of State led us to sos.state.co.us, confirmed August 2026, which you can open yourself
  2. Unpacking Colorado Secretary of State led us to sos.state.co.us, confirmed August 2026, which you can open yourself
  3. Unpacking Colorado yearly filing: Periodic report led us to coloradosos.gov, confirmed October 2026, which you can open yourself
  4. Unpacking Colorado report due date led us to colorado.public.law, confirmed August 2026, which you can open yourself
  5. Unpacking Colo led us to sos.state.co.us, confirmed August 2026, which you can open yourself
  6. Unpacking Colorado formation fee: Filing fee led us to coloradosos.gov, confirmed October 2026, which you can open yourself
  7. Unpacking Colorado Secretary of State, foreign led us to coloradosos.gov, confirmed October 2026, which you can open yourself
  8. Unpacking Sample Statement of Foreign Entity led us to coloradosos.gov, confirmed October 2026, which you can open yourself
  9. Unpacking Colorado Revised Statutes 2024, Title led us to content.leg.colorado.gov, confirmed October 2026, which you can open yourself
  10. Unpacking Registered agent requirements effective July led us to coloradosos.gov, confirmed October 2026, which you can open yourself
  11. Colorado Registered Agent.co pricing page, read November 13, 2026
  12. Mainstay Filing Colorado service page, read November 13, 2026
  13. CO Registered Agent.org pricing page, read November 13, 2026