No.1
Our top pick in Colorado
1. CO Registered Agent.org: best for companies that only add Colorado
Service charge $199, with the state fee separate; the agent costs $99 a year from the second year
Score9.1out of 10
First place: CO Registered Agent.org. $199 over the state fee registers the company in Colorado, and the agent renews at $99.
An in-state street address serves as the registered office, and papers served on the company are scanned into your online account.
Over three years it costs less than Mainstay Filing, and cost is one of our two most heavily weighted criteria.
In the price
- Foreign registration done for you
- The first year of registered agent service
Why pick it
- Registration at $199, with the state fee extra
- Includes your registered agent for the first year
- The agent renews at $99 annually
Weak spots
- Serves Colorado only; the home state needs its own agent
- The EIN application carries a separate fee ($99)
No.2
Best local option
2. Colorado Registered Agent.co: best for Colorado registrations only
$199 for the service, state fee on top; from year two the agent bills $99 annually
Score8.6out of 10
Second place: Colorado Registered Agent.co. $199 over the state fee registers the company in Colorado, and the agent renews at $99.
An in-state street address serves as the registered office, and papers served on the company are scanned into your online account.
Colorado Registered Agent.co mirrors CO Registered Agent.org on price and features, so the pair is nearly level.
In the price
- Foreign registration done for you
- The first year of registered agent service
Why pick it
- Afterward, $99 a year keeps the agent
- Includes your registered agent for the first year
- $199 to register, state fee on top
Weak spots
- Serves Colorado only; the home state needs its own agent
- The EIN application carries a separate fee ($99)
No.3
Best for expanding companies
3. Mainstay Filing: best for businesses active in several states
$199 for the service, $299 due now with the state fee; from year two the agent bills $149 annually
Score8.4out of 10
Third place: Mainstay Filing. $199 is added to the state fee in any state, and the first year as registered agent is included.
Once the free year has passed, $149 a year applies in any state.
CO Registered Agent.org costs $100 less over three years, and Mainstay Filing trails it on that criterion.
In the price
- The foreign registration, filed for you
- A free first year as your registered agent
- No charge for scanning served papers within the same business day
Why pick it
- A $199 service charge, with the state's fee added
- Year-one registered agent service costs nothing
- Service of process on the company scanned within the same business day, no charge
- One price in each of the fifty states
Weak spots
- The agent is $149 a year after year one, $50 more than CO Registered Agent.org
The 3 rulings in brief
| Rank | Provider | Ruling score | Service charge | Year two | Suited to | Link |
|---|
| 1 | CO Registered Agent.org | 9.1 | $199 | $99/yr | The lowest agent renewal on this list | Visit CO Registered Agent.orgPartner link. We may earn money if you buy. |
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| 2 | Colorado Registered Agent.co | 8.6 | $199 | $99/yr | The lowest agent renewal on this list | Visit Colorado Registered Agent.coPartner link. We may earn money if you buy. |
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| 3 | Mainstay Filing | 8.4 | $199 | $149/yr | Businesses spread over several states | Visit Mainstay FilingPartner link. We may earn money if you buy. |
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The 10-point scores are editorial. They apply the criteria on
How we rank and do not draw on customer ratings.
Colorado foreign registration service charges in 2026: year one, renewals and the three-year total
| Provider | Year one | Year two | Year three | Total over three years | Agent covered in year one |
|---|
| CO Registered Agent.org | $199 | $99 | $99 | $397 | Included |
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| Colorado Registered Agent.co | $199 | $99 | $99 | $397 | Included |
|---|
| Mainstay Filing | $199 | $149 | $149 | $497 | Free |
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Each charge was taken from the provider's own pages on November 12, 2026. Colorado's $100 registration fee is payable in addition to every row below and is not in the totals.
What decided the order
The decisive criterion in Colorado was charge over three years. For reference, the method assigns 31% to charge over three years, 31% to work taken off the founder and 38% across renewal conduct, fit with local rules and pricing in plain sight.
Over three years CO Registered Agent.org totals $397, $100 less than Mainstay Filing. Both providers include the first year, so the renewal charge carried the ruling.
Each criterion and its weight appear on How we rank.
Foreign LLC registration in Colorado: the form, the office and the fee
Registration is lodged with the Colorado Secretary of State, Business Program using the Statement of Foreign Entity Authority. The state fee is $100.
Once registered, the company's recurring filing is the periodic report, priced at $25, with a due date of once a year, by the end of the second month after your report month.
Items to gather before filing
- The exact legal name registered in the home state, along with the date it was formed.
- A registered agent whose street address is in the state. Any provider on this page can fill the role.
- The $100 state fee, remitted with the application.
- A date in your calendar for the periodic report, which carries a $25 fee.
Consequences of operating in Colorado unregistered
Civil penalties may reach $5,000.
Questions on Colorado foreign registration services
Is an out-of-state LLC required to register in Colorado?
Yes, as soon as it conducts business there.
What will foreign registration in Colorado run in total?
The state fee is $100; service charges run $199.
Is a registered agent still needed after the company is registered?
Yes. A registered agent with a street address in the state stays on file for as long as the registration lasts.
Which foreign registration services were heard in this ranking?
CO Registered Agent.org ($199), Colorado Registered Agent.co ($199) and Mainstay Filing ($199), ruled upon in that order.
What recurring filing does a foreign LLC owe?
The periodic report, at $25, each year.
Which foreign registration service does the record favor in Colorado?
CO Registered Agent.org, since it charges $199 beyond the state fee, including year-one registered agent service, then $99 a year for the agent.
The record
- Colorado Secretary of State, on the record as of August 2026
- Colorado Secretary of State, on the record as of August 2026
- Colorado yearly filing: Periodic report, official source, on the record as of October 2026
- Colorado report due date, on the record as of August 2026
- Colo. Rev. Stat. § 7-80-203, on the record as of August 2026
- Colorado formation fee: Filing fee, official source, on the record as of October 2026
- Colorado Secretary of State, foreign entity FAQ, on the record as of October 2026
- Sample Statement of Foreign Entity Authority, on the record as of October 2026
- Colorado Revised Statutes 2024, Title 7, on the record as of October 2026
- Registered agent requirements effective July 1, 2025, on the record as of October 2026
- Exhibit: CO Registered Agent.org, pricing and service pages, November 12, 2026
- Exhibit: Colorado Registered Agent.co, pricing and service pages, November 12, 2026
- Exhibit: Mainstay Filing, Colorado service page, November 12, 2026