Colorado Registered Agent.co takes the top spot because the Colorado registration is $199 and includes year one as agent, with $99 a year after that.
The registered office is an in-state street address supplied by the plan, and any papers served on the company show up as scans in your online account.
Across three years its total is under Mainstay Filing's, and that counts for a lot in our scoring.
In the price
- The registration filing
- A first year as your registered agent
Good
- Covers your first year of registered agent service
- $99 a year afterward for the agent
- Registration costs $199 before the state fee
Watch for
- Colorado only; your home state needs its own agent
- The EIN application is an extra charge ($99)
Mainstay Filing makes the list at number two because $199 prepares the Colorado registration and the registered agent role costs nothing in year one, then $149 a year.
When the complimentary year ends, the agent charge becomes $149 a year in any state.
Colorado Registered Agent.co undercuts it by $100 across three years, which leaves Mainstay Filing second on cost.
In the price
- The foreign registration handled on your behalf
- Registered agent service is free for the first year
- Free scans of served papers on the same business day
Good
- The same price in each of the fifty states
- $199 service fee, with the state's fee added
- Papers served on the company are scanned the same business day at no charge
- No charge for registered agent service in year one
Watch for
- The agent is $149 a year after year one, $50 above Colorado Registered Agent.co
CO Registered Agent.org makes the list at number three because the Colorado registration is $199 and includes year one as agent, with $99 a year after that.
The registered office is an in-state street address supplied by the plan, and any papers served on the company show up as scans in your online account.
We found no difference in price or features between Colorado Registered Agent.co and CO Registered Agent.org; choose whichever you prefer.
In the price
- The registration filing
- A first year as your registered agent
Good
- Keeps the agent for $99 a year from year two
- $199 for the service, state fee extra
- Covers your first year of registered agent service
Watch for
- Colorado only; your home state needs its own agent
- The EIN application is an extra charge ($99)
The 3 picks side by side
Each number out of 10 is our own mark, drawn from the weighted criteria on How we rank, and not a customer rating.
Colorado foreign registration service pricing in 2026: first year, renewals, three-year total
Every price comes from the company's own pages as of November 12, 2026. The $100 Colorado registration fee comes on top of each row and is left out of the totals.
Why these made the shortlist
Filing Shortlist puts 28% of the weight on three-year price and 28% on what the price covers. The remaining 44% goes to renewal terms, fit for the state and price clarity, and for Colorado the deciding factor was three-year price.
Colorado Registered Agent.co adds up to $397 over three years, which is $100 below Mainstay Filing. Both services include year one, which left the renewal price to settle the order.
Every criterion and weight is set out on How we rank.
Registering a foreign LLC in Colorado: fee, form and office
Registration goes to the Colorado Secretary of State, Business Program on the Statement of Foreign Entity Authority. The state fee is $100.
Each year after that, the company files the periodic report for $25, due once a year, by the end of the second month after your report month.
What to have ready before you file
- The company's exact legal name and its formation date in the home state.
- A registered agent at a street address in the state. Every company on this shortlist can be that agent.
- Payment of the $100 state fee with the filing.
- A reminder in your own calendar for the periodic report and its $25 fee.
The cost of skipping Colorado registration
Civil penalties go as high as $5,000.
Common questions about Colorado foreign registration services
Must an LLC from another state register in Colorado?
It must, once it does business in the state.
What is the full price of a foreign LLC registration in Colorado?
The state fee is $100, and service fees run $199.
Does a registered foreign LLC still need a registered agent?
Yes. The company keeps a registered agent in the state, at a street address there, for as long as it stays registered.
Which foreign registration services made this shortlist?
Colorado Registered Agent.co ($199), Mainstay Filing ($199) and CO Registered Agent.org ($199), listed from the top pick down.
What does a foreign LLC file each year?
The periodic report, which carries a $25 fee, once a year.
Which service leads the Colorado foreign registration shortlist?
Colorado Registered Agent.co, because $199 above the state fee gets the company registered in Colorado, and the agent renews at $99.
Where the figures come from
- Colorado Secretary of State (checked again August 2026)
- Colorado Secretary of State (checked again August 2026)
- Colorado yearly filing: Periodic report, official source (checked again October 2026)
- Colorado report due date (checked again August 2026)
- Colo. Rev. Stat. § 7-80-203 (checked again August 2026)
- Colorado formation fee: Filing fee, official source (checked again October 2026)
- Colorado Secretary of State, foreign entity FAQ (checked again October 2026)
- Sample Statement of Foreign Entity Authority (checked again October 2026)
- Colorado Revised Statutes 2024, Title 7 (checked again October 2026)
- Registered agent requirements effective July 1, 2025 (checked again October 2026)
- Pulled from Colorado Registered Agent.co: pricing and service pages, November 12, 2026
- Pulled from Mainstay Filing: Colorado service page, November 12, 2026
- Pulled from CO Registered Agent.org: pricing and service pages, November 12, 2026