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The Formation Desk

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

Foreign registration picks · Colorado

3 Best Foreign Registration Services in Colorado (2026)

The The Formation Desk call for foreign registration services in Colorado in 2026: Mainstay Filing ($199), Colorado Registered Agent.co ($199) and CO Registered Agent.org ($199), in that order. Mainstay Filing takes the call: it files the Colorado registration for $199 and serves as your registered agent, free in year one, then $149 a year.
Written by The Formation Desk editorial team
1
Best here

1. Mainstay Filing: best for companies working in more than one state

A $199 service fee plus state fees ($299 today), then $149 a year for the agent

Editorial score 9.4 out of 10

The desk picks Mainstay Filing: $199 on top of state fees in any state, with the first year of registered agent service included.

After a free first year, expect $149 a year for the agent, in this state or any other.

Over three years Mainstay runs $100 more than Colorado Registered Agent.co, and the desk thinks the wider coverage is worth it.

In the price

  • Registration paperwork prepared and filed
  • Registered agent service costs nothing in year one
  • Scanned service of process delivered the same business day at no cost

Strengths

  • Same price in all fifty states
  • $199 service fee, state fee on top
  • Free scans of served papers on the same business day
  • Registered agent costs nothing in year one

Cons

  • Agent renewal of $149 is $50 above Colorado Registered Agent.co
Visit Mainstay FilingPartner link. We may earn money if you buy. Mainstay Filing up close
2
Best local option

2. Colorado Registered Agent.co: best for adding only Colorado

A $199 service fee plus state fees, then $99 a year for the agent

Editorial score 9.1 out of 10

Runner-up, Colorado Registered Agent.co: $199 plus the state fee, one year of registered agent service included, then $99 a year for the agent.

You get an in-state street address as the registered office, and papers served there are scanned into your account.

In the price

  • Colorado registration filed for you
  • The first year as your registered agent

Strengths

  • Year-two agent price: $99
  • Registered agent service for year one is covered
  • Registers the company for $199, plus the state's fee

Cons

  • Colorado only; your home state needs its own agent
  • EIN application will cost you $99 more
Visit Colorado Registered Agent.coPartner link. We may earn money if you buy. Colorado Registered Agent.co up close
3
Best value here

3. CO Registered Agent.org: best for Colorado registrations only

$199 plus the state fee, then the agent at $99 a year from year two

Editorial score 8.9 out of 10

Third, CO Registered Agent.org: $199 plus the state fee, one year of registered agent service included, then $99 a year for the agent.

You get an in-state street address as the registered office, and papers served there are scanned into your account.

The published prices and features do not separate Colorado Registered Agent.co from CO Registered Agent.org; take whichever you like.

In the price

  • Colorado registration filed for you
  • The first year as your registered agent

Strengths

  • Registered agent service for year one is covered
  • $199 to register, state fee extra
  • $99 yearly to keep the agent

Cons

  • Colorado only; your home state needs its own agent
  • EIN application will cost you $99 more
Visit CO Registered Agent.orgPartner link. We may earn money if you buy. CO Registered Agent.org up close

The desk's 3 picks in brief

Pick Service Desk score Service fee Year two Good for Visit
1 Mainstay Filing 9.4 $199 $149/yr Companies doing business in several states Visit Mainstay FilingPartner link. We may earn money if you buy.
2 Colorado Registered Agent.co 9.1 $199 $99/yr The lowest agent renewal we rank here Visit Colorado Registered Agent.coPartner link. We may earn money if you buy.
3 CO Registered Agent.org 8.9 $199 $99/yr The lowest agent renewal we rank here Visit CO Registered Agent.orgPartner link. We may earn money if you buy.

A score out of 10 here is editorial judgment built on the criteria explained on How we rank, not an average of customer ratings.

What a Colorado foreign registration service costs in 2026: year one, renewal and the three-year bill

Service Year one Year two Year three Bill over three years Agent covered in year one
Mainstay Filing $199 $149 $149 $497 Free
Colorado Registered Agent.co $199 $99 $99 $397 Included
CO Registered Agent.org $199 $99 $99 $397 Included

Every price here was read off the company's own pages on November 12, 2026. Colorado's $100 registration fee comes on top of every row and is left out of these totals.

Why it falls this way

Here is the weighting: 33% for spend over three years, 33% for work the price removes, 34% spread over what renewal looks like, fit with the state and plain price display. In Colorado, work the price removes made the call.

Foreign registration means two states, and one provider at one price in both won on coverage, ahead of Colorado Registered Agent.co.

The full criteria and weights are on How we rank.

Registering a foreign LLC in Colorado: fee, form and who gets it

To register, the company files the Statement of Foreign Entity Authority with the Colorado Secretary of State, Business Program and pays the state's $100.

From then on the company owes the periodic report ($25), due once a year, by the end of the second month after your report month.

What to pull together first

  • The company name exactly as the home state spells it, and when it was formed.
  • An in-state registered agent; any service the desk picked can fill that seat.
  • $100 for the state, paid when you file.
  • A date on your calendar for the periodic report and its $25 fee.

What it costs to ignore Colorado registration

Fines can go as high as $5,000.

Colorado foreign registration service: reader questions

Does an LLC from elsewhere have to register to operate in Colorado?

Yes, once it starts doing business there.

What will foreign registration cost you in Colorado?

$100 goes to the state and $199 to the service.

Do you still need a registered agent after you register?

Yes. Keep a registered agent with a street address in the state on file.

Which foreign registration services did the desk rank here?

Mainstay Filing ($199), Colorado Registered Agent.co ($199) and CO Registered Agent.org ($199), best pick first.

What does a registered foreign LLC owe each year?

The periodic report, which costs $25.

Who is our pick for foreign registration in Colorado?

Mainstay Filing, since $199 plus the state's own fee, the registered agent free for year one and the same price in every state.

Read next

Where the numbers came from

  1. Colorado Secretary of State, last checked August 2026
  2. Colorado Secretary of State, last checked August 2026
  3. Colorado yearly filing: Periodic report, official source, last checked October 2026
  4. Colorado report due date, last checked August 2026
  5. Colo. Rev. Stat. § 7-80-203, last checked August 2026
  6. Colorado formation fee: Filing fee, official source, last checked October 2026
  7. Colorado Secretary of State, foreign entity FAQ, last checked October 2026
  8. Sample Statement of Foreign Entity Authority, last checked October 2026
  9. Colorado Revised Statutes 2024, Title 7, last checked October 2026
  10. Registered agent requirements effective July 1, 2025, last checked October 2026
  11. Mainstay Filing: Colorado service page, as of November 12, 2026
  12. Colorado Registered Agent.co: pricing and service pages, as of November 12, 2026
  13. CO Registered Agent.org: pricing and service pages, as of November 12, 2026