LLC service ratings · Colorado
3 Best LLC Services in Colorado (2026)
1. CO Registered Agent.org: best for a Colorado LLC that will not expand
$199 to form, $99 a year for the agent, state fee extra
CO Registered Agent.org is rated first: $199 plus the Colorado filing fee, first-year registered agent service included, then $99 a year.
The plan lists an in-state street address as the registered office and scans papers served there into your account.
The periodic report sits outside its published prices; you file it with Colorado yourself every year.
On three-year sums it comes out ahead of Mainstay Filing.
What you get
- Colorado formation filed for you
- Registered agent service for year one
Pros
- Forms the LLC for $199 plus state fees
- Agent line of $99 from year two
- First-year registered agent service is included
Trade-offs
- The periodic report is not on its price list
- EIN application billed at $99
2. Colorado Registered Agent.co: best for staying local in Colorado
$199 to form, $99 a year for the agent, state fee extra
Colorado Registered Agent.co is rated second: $199 plus the Colorado filing fee, first-year registered agent service included, then $99 a year.
The plan lists an in-state street address as the registered office and scans papers served there into your account.
The periodic report sits outside its published prices; you file it with Colorado yourself every year.
CO Registered Agent.org and Colorado Registered Agent.co list identical amounts and plan features, so the ratings are close and either is a fair pick.
What you get
- Colorado formation filed for you
- Registered agent service for year one
Pros
- $99 a year for the agent after year one
- Registered agent service for year one is included
- Forms the LLC for $199 plus state fees
Trade-offs
- The periodic report is not on its price list
- EIN application billed at $99
3. Mainstay Filing: best for formation, agent and periodic report on a single line
$199 a year plus the state fee, $249 due at checkout
Mainstay Filing is rated third: the Colorado formation, the registered agent and the periodic report are bundled into $199 a year.
Mainstay files the periodic report at each renewal. The state's line is $25 every year, due last day of the entity's anniversary month, with $50 added if late, and Mainstay passes that fee on at cost.
CO Registered Agent.org is $200 cheaper on the three-year sum, and that lowers Mainstay Filing's cost rating.
What you get
- Your formation paperwork, handled
- Your registered agent through the year
- Periodic report prepared and filed
- EIN application
Pros
- Colorado's fee goes through at cost
- $199 on renewal with no extras
- One $199 yearly line that includes the periodic report
- EIN application is in the package
Trade-offs
- Agent renews $100 a year above CO Registered Agent.org
The 3 ratings summarized
| Line | Service | Rating | Service fee | Year two | Best for | Open |
|---|---|---|---|---|---|---|
| 1 | CO Registered Agent.org | 9.4 | $199 | $99/yr | A Colorado-only LLC counting every dollar | Visit CO Registered Agent.orgPartner link. We may earn money if you buy. |
| 2 | Colorado Registered Agent.co | 9.2 | $199 | $99/yr | A Colorado-only LLC counting every dollar | Visit Colorado Registered Agent.coPartner link. We may earn money if you buy. |
| 3 | Mainstay Filing | 9.1 | $199 | $199/yr | Formation, agent and periodic report on one line | Visit Mainstay FilingPartner link. We may earn money if you buy. |
Colorado LLC service amounts for 2026: year one, renewal and three-year sum
| Service | Year one | Year two | Year three | Three-year sum | Periodic report filed by them |
|---|---|---|---|---|---|
| CO Registered Agent.org | $199 | $99 | $99 | $397 | No |
| Colorado Registered Agent.co | $199 | $99 | $99 | $397 | No |
| Mainstay Filing | $199 | $199 | $199 | $597 | Yes |
Reasoning behind the order
Cost over years one to three decided the order in Colorado. Of the rating, 27% is cost over years one to three, 27% is inclusions per price and 46% is renewal price and terms, fit with state rules and price clarity.
CO Registered Agent.org sums to $397 across three years, $200 below Mainstay Filing. Mainstay would also file the periodic report, but an owner can file it directly for the state fee alone, so the lower amount decided the rating.
Each criterion and its weight is listed on How we rank.
Colorado LLC formation: official amount and form
Filing the Articles of Organization costs $50, paid to the Colorado Secretary of State. Each service here passes that amount through at cost, added to its own.
Ongoing items for a Colorado LLC
Plan on the periodic report every year; the date is last day of the entity's anniversary month. State amount: $25. Late: $50 extra. Every LLC must name a registered agent with an in-state street address.
Colorado LLC service: your questions
What are the total costs to form an LLC in Colorado?
$50 to the state plus $199 to the service.
What is the formation document called?
It is the Articles of Organization, lodged with the Colorado Secretary of State.
Is a registered agent a requirement for a Colorado LLC?
Yes. Colorado wants a registered agent on file at all times, with a physical street address in the state.
Which filings recur each year for a Colorado LLC?
One line item: the periodic report, every year, due last day of the entity's anniversary month, fee $25.
Is the EIN application a separate charge?
Mainstay Filing includes it in the yearly price. CO Registered Agent.org and Colorado Registered Agent.co charge $99 separately. At the IRS the EIN itself costs nothing.
Which LLC service holds the top rating in Colorado?
CO Registered Agent.org, as Colorado formation at $199 beyond the state's amount, first agent year included, then $99 a year for the agent.
Source lines
- Colorado Secretary of State (ledger date August 2026)
- Colorado Secretary of State (ledger date August 2026)
- Colorado yearly filing: Periodic report, official source (ledger date October 2026)
- Colorado report due date (ledger date August 2026)
- Colo. Rev. Stat. § 7-80-203 (ledger date August 2026)
- Colorado formation fee: Filing fee, official source (ledger date October 2026)
- CO Registered Agent.org, pricing and service pages: amounts read November 12, 2026
- Colorado Registered Agent.co, pricing and service pages: amounts read November 12, 2026
- Mainstay Filing, Colorado service page: amounts read November 12, 2026