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Formation ClassClass is in session: LLC paperwork, state by state.

Class session 3 · Colorado

Foreign LLC Registration Class, Colorado (2026): 4 Assignments and the 3 Best Services

Graded for 2026, the best help with registering an LLC from another state in Colorado comes from Mainstay Filing ($199), CO Registered Agent.org ($199) and Colorado Registered Agent.co ($199), in that order. Registering takes 4 assignments and a $100 state fee, with $25 due on each later report.

Taught by the Formation Class faculty

Class overview

What the state charges to register$100coloradosos.gov, last read in October 2026
Recurring report$25Periodic report
What the state collects in three years$150State charges only
How many assignments4One by one

Class goals

  • Whether Colorado registration applies to your LLC
  • The official form and fee
  • What comes after registration
  • How the picks stack up

The Colorado honor roll

Tuition over three years leads, then homework done, year-two tuition, Colorado fit and readable fees (grading page).
Top of the class

1. Mainstay Filing: best for a second state and beyond

$199 to register, $149 per year after

In Colorado, Mainstay Filing sits at the top of the class: a $199 service fee plus Colorado's own fee, then $149 a year for the agent.

Next to CO Registered Agent.org the three-year premium is $100, which the 34% weight on homework done outweighs.

From year two you pay $149 a year for the agent, wherever you register.

Covered by the tuition

  • Registration paperwork handled
  • The registered agent costs nothing in year one
  • A service for all fifty states

Strengths

  • Ready for the next state too
  • Registered agent is free in year one
  • $199 to register

Weak spots

  • Renewal $50 above CO Registered Agent.org's
In-state service

2. CO Registered Agent.org: best for adding just Colorado

$199 to register, $99 per year after

Our second pick, CO Registered Agent.org: $199 above the state fee, first agent year covered, and $99 a year afterward.

Covered by the tuition

  • The Colorado registration, prepared and sent
  • One year of agent service is part of the price

Strengths

  • $199 and the state fee
  • Then $99 per year
  • Agent covered in year one

Weak spots

  • No help in other states
In-state service

3. Colorado Registered Agent.co: best for Colorado-only registrations

$199 to register, $99 per year after

Our third pick, Colorado Registered Agent.co: $199 above the state fee, first agent year covered, and $99 a year afterward.

CO Registered Agent.org and this service cost the same.

Covered by the tuition

  • The Colorado registration, prepared and sent
  • One year of agent service is part of the price

Strengths

  • $199 and the state fee
  • Agent covered in year one
  • Then $99 per year

Weak spots

  • No help in other states

Grades and prices together

#ServiceFirst yearFrom year twoThree-year total
1Mainstay Filing$199$149/yr$497Visit Mainstay FilingPartner link. We may earn money if you buy.
2CO Registered Agent.org$199$99/yr$397Visit CO Registered Agent.orgPartner link. We may earn money if you buy.
3Colorado Registered Agent.co$199$99/yr$397Visit Colorado Registered Agent.coPartner link. We may earn money if you buy.
Company prices as listed on November 13, 2026. None of the rows includes the $100 state fee.

The Colorado registration, in order

  1. Assignment
    1

    See if your LLC must register in Colorado

    When an LLC from elsewhere starts operating in Colorado, foreign registration is the way in. The cost of not registering: and can reach $5,000.

    Textbook page: coloradosos.gov, last read in October 2026

  2. Assignment
    2

    Appoint the Colorado registered agent

    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.

    Each of the graded services serves as the registered agent.

    Textbook page: sos.state.co.us, last read in October 2026

  3. Assignment
    3

    Put together and mail the Statement of Foreign Entity Authority

    Filing it is registering, and the state bills $100.

    Textbook page: coloradosos.gov, last read in October 2026

  4. Assignment
    4

    Keep the registration alive

    Next on the schedule is the periodic report for $25, once a year, by the end of the second month after your report month.

What each assignment costs in Colorado

ItemPaid toTotal
Filing to registerState office$100
Periodic reportState office$25
Optional serviceYour service$199 at the start
State fees for the first three yearsState office$150
The state's fees come from official pages, listed below. Added up over three years they are the filing, two reports and, in a few states, a minimum tax.

The reasoning behind the grades

Homework the price does settled first place in Colorado. It is worth 34% of the grade, and the rest comes from tuition across three years, year-two tuition, fit with the state class and fees a student can read.

Your LLC was formed in one state and works in another, so a provider that serves both earned the best grade.

Colorado pop quiz

What will it cost to register a foreign LLC in Colorado?

$100 at the state office. Service fees: $199.

Which form do I file to register?

One form does the job, and the Colorado Secretary of State, Business Program handles it.

What if the LLC does business there without registering?

and can reach $5,000.

What is due after registering?

Look ahead to the periodic report, which costs $25.

Which services are in this lesson?

Mainstay Filing, CO Registered Agent.org and Colorado Registered Agent.co; prices are in the table above.

Which service should handle the registration?

Mainstay Filing, CO Registered Agent.org and Colorado Registered Agent.co, from the highest grade to the lowest.

Keep learning

Textbook pages and extra reading

  1. The Colorado Secretary of State lesson rests on sos.state.co.us, read again in August 2026; check our work against it.
  2. The Colorado Secretary of State lesson rests on sos.state.co.us, read again in August 2026; check our work against it.
  3. The Colorado yearly filing: Periodic report, official source lesson rests on coloradosos.gov, read again in October 2026; check our work against it.
  4. The Colorado report due date lesson rests on colorado.public.law, read again in August 2026; check our work against it.
  5. The Colo lesson rests on sos.state.co.us, read again in August 2026; check our work against it.
  6. The Colorado formation fee: Filing fee, official source lesson rests on coloradosos.gov, read again in October 2026; check our work against it.
  7. The Colorado Secretary of State, foreign entity FAQ lesson rests on coloradosos.gov, read again in October 2026; check our work against it.
  8. The Sample Statement of Foreign Entity Authority lesson rests on coloradosos.gov, read again in October 2026; check our work against it.
  9. The Colorado Revised Statutes 2024, Title 7 lesson rests on content.leg.colorado.gov, read again in October 2026; check our work against it.
  10. The Registered agent requirements effective July 1, 2025 lesson rests on coloradosos.gov, read again in October 2026; check our work against it.
  11. Colorado service page from Mainstay Filing as of November 13, 2026
  12. pricing page from CO Registered Agent.org as of November 13, 2026
  13. pricing page from Colorado Registered Agent.co as of November 13, 2026