Skip to content
Filing Verdict

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

Foreign registration verdict · Colorado

3 Best Foreign Registration Services in Colorado (2026)

Filing Verdict's 2026 verdict on foreign registration services in Colorado: Colorado Registered Agent.co ($199), Mainstay Filing ($199) and CO Registered Agent.org ($199), in that order. Colorado Registered Agent.co takes first place: $199 plus the state fee, with a year of registered agent service included, then $99 a year for the agent.
The Filing Verdict editorial team
Number one here
Spot 1

1. Colorado Registered Agent.co: best for companies adding only Colorado

$199 service fee, state fee added; $99 a year from year two

9.6Editorial score
out of 10

Colorado Registered Agent.co wins here: the Colorado registration for $199 with the first agent year included, then $99 a year.

The plan gives the company an in-state street address as its registered office, and papers served on the company are scanned to your online account.

The three-year total beats Mainstay Filing's, and that cost advantage carries real weight in our method.

What you get

  • Foreign registration done for you
  • One year of registered agent service

What we like

  • $199 to register, plus the state's fee
  • Includes the first year as your registered agent
  • Then $99 a year for agent service

Cons

  • Covers Colorado only; your home state needs its own agent
  • The EIN application is billed separately ($99)
Visit Colorado Registered Agent.coPartner link. We may earn money if you buy. Our full Colorado Registered Agent.co verdict
One price, any state
Spot 2

2. Mainstay Filing: best for companies working in several states

$199 service fee, state fee added ($299 today); $149 a year from year two

9.1Editorial score
out of 10

Second place goes to Mainstay Filing: $199 on top of the state fee, the same in any state, with the first year of registered agent service included.

The first agent year is free; from then on it runs $149 a year anywhere.

Over three years Colorado Registered Agent.co is $100 cheaper, which puts Mainstay Filing behind it on cost.

What you get

  • The registration filing, done for you
  • First-year registered agent service, free
  • Same-business-day scan and upload of served papers, no charge

What we like

  • Service fee of $199, plus the state's fee
  • One price in all fifty states
  • Same-business-day scans of served papers, free
  • Registered agent service free in year one

Cons

  • After year one its agent runs $149 a year, $50 above Colorado Registered Agent.co
Visit Mainstay FilingPartner link. We may earn money if you buy. Our full Mainstay Filing verdict
Best local option
Spot 3

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

$199 on top of the state fee; the agent is $99 a year from year two

9.0Editorial score
out of 10

Third place goes to CO Registered Agent.org: the Colorado registration for $199 with the first agent year included, then $99 a year.

The plan gives the company an in-state street address as its registered office, and papers served on the company are scanned to your online account.

Nothing in the published prices or features divides Colorado Registered Agent.co from CO Registered Agent.org; pick either.

What you get

  • Foreign registration done for you
  • One year of registered agent service

What we like

  • $99 per year keeps the agent from year two
  • Service fee $199, state fee extra
  • Includes the first year as your registered agent

Cons

  • Covers Colorado only; your home state needs its own agent
  • The EIN application is billed separately ($99)
Visit CO Registered Agent.orgPartner link. We may earn money if you buy. Our full CO Registered Agent.org verdict

The 3 verdicts at a glance

No.ServiceVerdict scoreService feeYear twoBest forVisit
1Colorado Registered Agent.co9.6$199$99/yrThe lowest agent renewal here Visit Colorado Registered Agent.coPartner link. We may earn money if you buy.
2Mainstay Filing9.1$199$149/yrCompanies registered in several states Visit Mainstay FilingPartner link. We may earn money if you buy.
3CO Registered Agent.org9.0$199$99/yrThe lowest agent renewal here Visit CO Registered Agent.orgPartner link. We may earn money if you buy.
Scores come from Filing Verdict's editors, out of 10, using the criteria explained on How we rank; they are not customer ratings.

Colorado foreign registration service prices for 2026: year one, renewals and three years

ServiceYear 1Year 2Year 3Total, 3 yearsAgent covered in year one
Colorado Registered Agent.co$199$99$99$397Included
Mainstay Filing$199$149$149$497Free
CO Registered Agent.org$199$99$99$397Included
Prices were read from each company's own pages on November 12, 2026. Colorado's $100 registration fee goes on top of every row and is not counted in these totals.

Why this order

Two criteria lead Filing Verdict's method at 35% apiece: total over three years and paperwork the price handles. Renewal behavior, match to the state and up-front pricing share the other 30%, and Colorado came down to total over three years.

Colorado Registered Agent.co totals $397 over three years, $100 under Mainstay Filing. Year one is covered by both services, so the renewal price decided the order.

The full list of criteria and weights is on How we rank.

Colorado foreign LLC registration: the fee, the form and the filing office

The company registers with the Colorado Secretary of State, Business Program by filing the Statement of Foreign Entity Authority. The state fee is $100.

Afterwards the company files the periodic report ($25), due once a year, by the end of the second month after your report month.

Before you file: a checklist

  • The exact legal name from the home state, and the date the company was formed there.
  • A registered agent with a street address in the state; each service on this page can act in that role.
  • The $100 state fee, paid with the filing.
  • A calendar entry for the periodic report and its $25 fee.

What skipping Colorado registration can cost

Civil penalties can reach $5,000.

Colorado foreign registration service: questions answered

Does Colorado require an out-of-state LLC to register?

Yes, once it transacts business there.

What does foreign registration cost in Colorado?

The state fee is $100, and the service fee is $199.

Is a registered agent required once I have registered?

Yes. The company still needs a registered agent here, with a street address in the state.

Which foreign registration services are ranked on this page?

Colorado Registered Agent.co ($199), Mainstay Filing ($199) and CO Registered Agent.org ($199), from first place to last.

What does a foreign LLC file every year?

Each year it files the periodic report ($25 fee).

Which foreign registration service is the best pick in Colorado?

Colorado Registered Agent.co, because $199 over the state fee to register in Colorado, with the agent renewing at $99.

Keep reading

Sources and dates

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