Place1
Top pick on this pageCO Registered Agent.org
1. CO Registered Agent.org: best for Colorado registration on a budget
$199 plus fees, then $99 a year
Our mark9.3out of 10
CO Registered Agent.org is number one here: $199 over the state fee to register in Colorado, with the agent at $99 a year after that.
You get a Colorado street address for the registered office, and served papers are scanned to your account.
Cost decides it: over three years it comes in under Mainstay Filing.
What you get
- Colorado registration filed for you
- A year of registered agent service
Why pick it
- $199 to register
- $99 yearly from year two
- A year of registered agent service included
Less good
- Focused on Colorado; your home state needs its own agent
- $99 extra for the EIN application
Place2
Fifty-state coverageMainstay Filing
2. Mainstay Filing: best for expanding companies
$199 plus fees, then $149 a year
Our mark9.1out of 10
In second place, Mainstay Filing: $199 plus the state's own fee, with your registered agent free for the first year and one price in every state.
Year two onward, $149 a year for the agent, in any state.
CO Registered Agent.org undercuts it by $100 over three years, and cost is our heaviest criterion.
What you get
- Registration prepared and filed
- Your registered agent, free for the first year
- Service of process scanned the same business day, no fee
Why pick it
- Service of process scanned the same business day, no fee
- Registered agent free for the first year
- Any state, same fee
- Service fee $199 plus state fees
Less good
- CO Registered Agent.org's agent renews for $50 less
Place3
Lower renewal than MainstayColorado Registered Agent.co
3. Colorado Registered Agent.co: best for a second Colorado option
$199 plus fees, then $99 a year
Our mark9.0out of 10
Colorado Registered Agent.co comes third with $199 over the state fee to register in Colorado, with the agent at $99 a year after that.
You get a Colorado street address for the registered office, and served papers are scanned to your account.
Same prices and features as CO Registered Agent.org; pick whichever you prefer.
What you get
- Colorado registration filed for you
- A year of registered agent service
Why pick it
- $199 to register
- $99 yearly from year two
- A year of registered agent service included
Less good
- Focused on Colorado; your home state needs its own agent
- $99 extra for the EIN application
Shortlist at a glance
| Rank | Service | Our score | Service fee | Year two | Best for | Link |
|---|
| 1 | CO Registered Agent.org | 9.3 | $199 | $99/yr | Lowest agent renewal on this list | Visit CO Registered Agent.orgPartner link. We may earn money if you buy. |
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| 2 | Mainstay Filing | 9.1 | $199 | $149/yr | Companies registered in several states | Visit Mainstay FilingPartner link. We may earn money if you buy. |
|---|
| 3 | Colorado Registered Agent.co | 9.0 | $199 | $99/yr | Lowest agent renewal on this list | Visit Colorado Registered Agent.coPartner link. We may earn money if you buy. |
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Editorial scores out of 10 from The Founders Review, using the criteria explained on How we rank. No customer ratings are involved.
2026 prices: year one, renewal and three-year total cost
| Service | Year one | Year two | Year three | Three-year total | Agent in year one |
|---|
| CO Registered Agent.org | $199 | $99 | $99 | $397 | Included |
|---|
| Mainstay Filing | $199 | $149 | $149 | $497 | Free |
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| Colorado Registered Agent.co | $199 | $99 | $99 | $397 | Included |
|---|
Service fees as published on each company's own pages, read November 12, 2026. Colorado's registration fee ($100) is paid on top with every service and is left out of these totals.
Why this order
The Founders Review weighs five things, led by three-year cost and what one price covers at 30% each. For Colorado, three-year cost is what separated first place from second.
CO Registered Agent.org costs $397 over three years, $100 less than Mainstay Filing. Both include the first agent year, so the renewal price after that decided it.
Our method page lists all five criteria.
How foreign registration works in Colorado
The Colorado Secretary of State, Business Program takes the Statement of Foreign Entity Authority and a $100 state fee.
After registering, the company files the periodic report ($25), due once a year, by the end of the second month after your report month.
Your checklist
- Your legal name exactly as registered at home, and the formation date.
- A Colorado registered agent (any service here can serve).
- The $100 state fee, paid with the filing.
- A date in your calendar for the periodic report and its $25 fee.
If you never register
Penalties can reach $5,000.
Foreign registration services in Colorado: questions
Do I need to register my out-of-state LLC in Colorado?
Yes, if the company transacts business there.
How much does foreign registration cost in Colorado?
The state fee is $100. The services we rank add $199 to prepare and file it.
Do I need a registered agent after registering?
Yes. Every LLC must name a registered agent with an in-state street address.
Which foreign registration services do you rank here?
CO Registered Agent.org ($199), Mainstay Filing ($199) and Colorado Registered Agent.co ($199), in that order on this page.
What does a foreign LLC file each year?
The periodic report, with a $25 fee.
Which foreign registration service is best in Colorado?
CO Registered Agent.org ranks first on our method: a $199 service fee for the Colorado registration and a $99 agent renewal.
Sources and dates
- Colorado Secretary of State (checked August 2026): www.sos.state.co.us/pubs/business/FAQs/reports.html
- Colorado Secretary of State (checked August 2026): www.sos.state.co.us/pubs/business/helpFiles/REPORT_HELP.html
- Colorado yearly filing: Periodic report, official source (checked October 2026): www.coloradosos.gov/pubs/business/FAQs/reports.html
- Colorado report due date (checked August 2026): colorado.public.law/statutes/crs_7-90-501
- Colo. Rev. Stat. § 7-80-203 (checked August 2026): www.sos.state.co.us/pubs/info_center/fees/business.html
- Colorado formation fee: Filing fee, official source (checked October 2026): www.coloradosos.gov/pubs/info_center/fees/business.html
- Colorado Secretary of State, foreign entity FAQ (checked October 2026): www.coloradosos.gov/pubs/business/FAQs/foreigns.html
- Sample Statement of Foreign Entity Authority (checked October 2026): www.coloradosos.gov/pubs/business/sampleForms/AUTHORITY.pdf
- Colorado Revised Statutes 2024, Title 7 (checked October 2026): content.leg.colorado.gov/sites/default/files/images/olls/crs2024-title
- Registered agent requirements effective July 1, 2025 (checked October 2026): www.coloradosos.gov/pubs/business/RAchanges.html
- CO Registered Agent.org, pricing and service pages (read November 12, 2026)
- Mainstay Filing, Colorado service page (read November 12, 2026)
- Colorado Registered Agent.co, pricing and service pages (read November 12, 2026)