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Short reply · Colorado

3 Best Foreign Registration Services in Colorado (2026), Ranked

Best foreign registration services in Colorado for 2026: Mainstay Filing ($199), CO Registered Agent.org ($199) and Colorado Registered Agent.co ($199), ranked in that order. Registering costs $100 at Colorado, whoever files, plus $397 to $497 to a service over three years.

LLC Q and A editorial team ·

Quick answers

Fee to the state
$100
Certificate required?
Not required
Following
$25, periodic report
Pick
Mainstay Filing, CO Registered Agent.org then Colorado Registered Agent.co

Best in Colorado, in order

Order set by our five criteria, three-year cost first.
1#1 pick

1. Mainstay Filing: best for registering in several states

Register for $199; agent renews at $149

#1 in Colorado: Mainstay Filing, because $199 in every state, with the first registered agent year included.

The $100 premium over CO Registered Agent.org across three years buys coverage outside Colorado.

Registered agent: free in year one, $149 a year after, in any state.

Price covers

  • Registration filing
  • Registered agent, free first year
  • Same price in any state

For

  • $199 plus Colorado's fee
  • First agent year covered
  • All fifty states

Against

  • Agent renews at $149, $50 above CO Registered Agent.org
Mainstay Filing sitePartner link. We may earn money if you buy.
2Colorado specialist

2. CO Registered Agent.org: best for registering in just this state

Register for $199; agent renews at $99

Why CO Registered Agent.org is second: $199 files the registration and the agent renews at $99.

Price covers

  • Colorado registration filing
  • First-year agent included

For

  • No agent charge in year one
  • $199 plus state fee
  • Agent renews at $99

Against

  • Two states, two providers
CO Registered Agent.org sitePartner link. We may earn money if you buy.
3Colorado specialist

3. Colorado Registered Agent.co: best for another local option

Register for $199; agent renews at $99

Why Colorado Registered Agent.co is third: $199 files the registration and the agent renews at $99.

It charges exactly what CO Registered Agent.org charges.

Price covers

  • Colorado registration filing
  • First-year agent included

For

  • Agent renews at $99
  • No agent charge in year one
  • $199 plus state fee

Against

  • Two states, two providers
Colorado Registered Agent.co sitePartner link. We may earn money if you buy.

Side by side

#ServiceYear 1Per year afterTotal, 3 yearsCovers
1Mainstay Filing$199$149/yr$497registration filing; registered agent, free first year; same price in any stateMainstay Filing sitePartner link. We may earn money if you buy.
2CO Registered Agent.org$199$99/yr$397colorado registration filing; First-year agent includedCO Registered Agent.org sitePartner link. We may earn money if you buy.
3Colorado Registered Agent.co$199$99/yr$397colorado registration filing; First-year agent includedColorado Registered Agent.co sitePartner link. We may earn money if you buy.
Service fees only, from company price pages read November 13, 2026. State fees are identical for every pick.

Key questions

When must an out-of-state LLC register?

Register with the Colorado Secretary of State, Business Program first; do business in Colorado second.

Unregistered, an LLC may face penalties up to $5,000.

coloradosos.gov (October 2026) is the source of record

Cost to register?

$100 to the state, plus $199 for a service.

State fees reach $150 over three years, counting any recurring report. coloradosos.gov (October 2026) is the source of record

What registers the LLC?

Lodge the Statement of Foreign Entity Authority at the Colorado Secretary of State, Business Program; one filing registers the LLC.

The state does not ask for a good standing certificate from home.

What is due after registering?

The periodic report: $25.

Deadline per the state: once a year, by the end of the second month after your report month.

Why this order?

Winning criterion for Mainstay Filing: chores removed from your list, weighted 26%.

Five criteria: three-year price (36%), chores removed from your list (26%), price shown up front (15%), year-two bill (12%) and states served (11%).

Two states in play, so a provider for all states outranks CO Registered Agent.org.

Method

Colorado registration requirements

ItemDetailOfficial page
Registration fee$100coloradosos.gov (October 2026) is the source of record
Home-state certificateNot requiredcoloradosos.gov (October 2026) is the source of record
Periodic report$25coloradosos.gov (October 2026) is the source of record
Three-year state total$150Sum of the rows above
The last row adds the filing, two reports and any minimum tax. Variable costs are explained in the text and left out of the sum.

More replies

Is an agent needed at home too?

Yes, in most cases. A company active in every state, such as Mainstay Filing, can cover home and this state together.

What do the picks cost over three years?

Mainstay Filing will run $497, CO Registered Agent.org will run $397, Colorado Registered Agent.co will run $397, with state fees on top.

Are the fees official?

State fees cite their official page; service prices come from the company's own site.

Is a service required?

No law requires a service; it is a paid convenience.

Does a service file it?

Yes, every pick files it, and the state fee is the same for all.

Best foreign registration service in Colorado?

Rank Mainstay Filing ahead of CO Registered Agent.org and Colorado Registered Agent.co.

Sources

  1. Reference line for Colorado Secretary of State, drawn from sos.state.co.us and confirmed August 2026, as noted by our editors
  2. Reference line for Colorado Secretary of State, drawn from sos.state.co.us and confirmed August 2026, as noted by our editors
  3. Reference line for Colorado yearly filing: Periodic report, drawn from coloradosos.gov and confirmed October 2026, as noted by our editors
  4. Reference line for Colorado report due date, drawn from colorado.public.law and confirmed August 2026, as noted by our editors
  5. Reference line for Colo, drawn from sos.state.co.us and confirmed August 2026, as noted by our editors
  6. Reference line for Colorado formation fee: Filing fee, drawn from coloradosos.gov and confirmed October 2026, as noted by our editors
  7. Reference line for Colorado Secretary of State, foreign, drawn from coloradosos.gov and confirmed October 2026, as noted by our editors
  8. Reference line for Sample Statement of Foreign Entity, drawn from coloradosos.gov and confirmed October 2026, as noted by our editors
  9. Reference line for Colorado Revised Statutes 2024, Title, drawn from content.leg.colorado.gov and confirmed October 2026, as noted by our editors
  10. Reference line for Registered agent requirements effective July, drawn from coloradosos.gov and confirmed October 2026, as noted by our editors
  11. Mainstay Filing Colorado service page, read November 13, 2026
  12. CO Registered Agent.org pricing page, read November 13, 2026
  13. Colorado Registered Agent.co pricing page, read November 13, 2026