3 Best Foreign Registration Services in Colorado (2026)
LLC Review Desk's 2026 picks for foreign registration services in Colorado, favorite first, are CO Registered Agent.org ($199), Mainstay Filing ($199) and Colorado Registered Agent.co ($199). CO Registered Agent.org is our favorite, because registering in Colorado costs $199 and covers year one as your agent, then $99 a year.
By the LLC Review Desk editorial team
Position 1
Top pick on this page
1. CO Registered Agent.org: best for companies adding only Colorado
$199 for the service, and the state fee is extra; the agent is $99 a year from year two
Our score
9.4out of 10
9.4 out of 10
Our favorite is CO Registered Agent.org, because $199 beyond the state fee gets you registered in Colorado, and the agent renews at $99.
You get a street address in the state for your registered office, and any 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 biggest criteria.
In the price
Registration prepared and filed
The first year of registered agent service
What we like
Keeping the agent costs $99 yearly
Covers your first year of registered agent service
Registers the company for $199, with the state fee on top
Trade-offs
Colorado only; your home state needs its own agent
2. Mainstay Filing: best for owners working in more than one state
Service fee $199, state fee extra ($299 at checkout); $149 a year for the agent from year two
Our score
9.2out of 10
9.2 out of 10
Coming in second is Mainstay Filing, because $199 gets the Colorado registration filed, year one as registered agent costs nothing, and after that it's $149 a year.
Your free agent year ends after twelve months, and then it's $149 a year in any state.
CO Registered Agent.org is $100 cheaper over three years, so Mainstay Filing comes second on cost.
In the price
Registration paperwork prepared and sent in
Registered agent service is free in year one
No-charge scans of served papers on the day they arrive
What we like
Your first year of registered agent service is free
The same price in all fifty states
Same-business-day scans of papers served on the company, no charge
$199 for the service, plus the state's fee
Trade-offs
After year one the agent is $149 a year, $50 more than CO Registered Agent.org
The 10-point scores are ours. They come from the criteria on How we rank and don't use customer ratings.
What Colorado foreign registration services cost in 2026: year one, renewals and three years
Service
First year
Second year
Third year
Three-year total
Agent covered in year one
CO Registered Agent.org
$199
$99
$99
$397
Included
Mainstay Filing
$199
$149
$149
$497
Free
Colorado Registered Agent.co
$199
$99
$99
$397
Included
We took each price from the company's own pages on November 12, 2026. On top of every row, Colorado charges a $100 registration fee, which isn't in these totals.
What decided the order
In Colorado, three-year cost decided the order. If you're curious about the weights, three-year cost is 29%, filings in the price is 29% and renewal price, state fit and up-front totals share 42%.
CO Registered Agent.org comes to $397 over three years, which is $100 less than Mainstay Filing. Both include the first year, so the renewal price decided it.
You can read every criterion and weight on How we rank.
Registering a foreign LLC in Colorado: fee, form and who to send it to
You register through the Colorado Secretary of State, Business Program, using the Statement of Foreign Entity Authority. The state charges $100.
After that, plan on the periodic report each cycle ($25) by once a year, by the end of the second month after your report month.
Get these ready first
Your company's full legal name, exactly as registered at home, and the date it was formed there.
A registered agent with a street address in the state. Any service on this page can do it.
The $100 state fee to pay with the filing.
A reminder for yourself about the periodic report and its $25 fee.
What happens if you skip Colorado registration
Civil penalties can go up to $5,000.
Your questions about Colorado foreign registration services
Do I have to register my out-of-state LLC in Colorado?
If it does business there, yes.
What does registering a foreign LLC in Colorado come to?
The state charges $100, and services charge $199.
Do I still need a registered agent after I register?
Yes. You keep a registered agent with a street address in the state as long as the company stays registered.
Which foreign registration services did we review here?
CO Registered Agent.org ($199), Mainstay Filing ($199) and Colorado Registered Agent.co ($199), with our favorite first.
What does a foreign LLC send in every year?
The periodic report, which costs $25.
Who's the best choice for foreign registration in Colorado?
CO Registered Agent.org, because it's $199 plus the state fee, with your first registered agent year included, then $99 a year for the agent.