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State reply · Colorado

3 Best LLC Services in Colorado (2026) and the Facts Behind Them

Best LLC formation services in Colorado for 2026: Colorado Registered Agent.co ($199), Mainstay Filing ($199) and CO Registered Agent.org ($199), ranked in that order. State fee: $50. Services over three years: $397 to $597.

LLC Q and A editorial team ·

Quick answers

State filing fee
$50, one time
After that
$25 yearly
Registered agent
Yes, by statute
Pick
Colorado Registered Agent.co, Mainstay Filing then CO Registered Agent.org

Best in Colorado, in order

Prices come from each company's own page. See the method.
1#1 pick

1. Colorado Registered Agent.co: best for a one-state LLC

Form for $199; renew at $99 a year

#1 in Colorado: Colorado Registered Agent.co, because formation is $199 with the agent covered in year one, then $99 a year.

Lower three-year cost than Mainstay Filing, and cost is the heaviest criterion.

You still handle the periodic report yourself.

Price covers

  • LLC filed for you
  • Agent for year one

For

  • Agent free at the start
  • Then $99 a year
  • Opens at $199 over the state fee

Against

  • Periodic report is on your list
  • EIN application costs $99 extra
Go to Colorado Registered Agent.coPartner link. We may earn money if you buy.
2Nationwide

2. Mainstay Filing: best for skipping the periodic report

$199 a year, $50 to the state

Second: Mainstay Filing, because the periodic report is filed inside the $199 annual price, with formation and the registered agent.

Colorado Registered Agent.co is $200 less over three years, which outweighs the rest.

The periodic report is filed for you; Colorado's $25 is billed at cost.

Price covers

  • LLC formation filing
  • Registered agent for a year
  • Periodic report filed
  • EIN application filed
  • State fees passed through, no markup

For

  • Renews at $199
  • EIN handled at no extra charge
  • $199/yr covers filing, agent and report

Against

  • $100/yr above Colorado Registered Agent.co after year one
Go to Mainstay FilingPartner link. We may earn money if you buy.
3Colorado only

3. CO Registered Agent.org: best for another local option

Form for $199; renew at $99 a year

Why CO Registered Agent.org is third: formation is $199 with the agent covered in year one, then $99 a year.

You still handle the periodic report yourself.

It charges exactly what Colorado Registered Agent.co charges.

Price covers

  • LLC filed for you
  • Agent for year one

For

  • Opens at $199 over the state fee
  • Then $99 a year
  • Agent free at the start

Against

  • Periodic report is on your list
  • EIN application costs $99 extra
Go to CO Registered Agent.orgPartner link. We may earn money if you buy.

Comparison

#ServiceYear 1RenewalTotal, 3 yearsCovers
1Colorado Registered Agent.co$199$99/yr$397LLC filed for you; agent for year oneGo to Colorado Registered Agent.coPartner link. We may earn money if you buy.
2Mainstay Filing$199$199/yr$597LLC formation filing; registered agent for a year; periodic report filedGo to Mainstay FilingPartner link. We may earn money if you buy.
3CO Registered Agent.org$199$99/yr$397LLC filed for you; agent for year oneGo to CO Registered Agent.orgPartner link. We may earn money if you buy.
Prices as of November 13, 2026. State fees are in the checklist below.

Key questions

How much to start an LLC in this state?

State fee $50; add $199 for first-year service.

Three-year state total: $100. coloradosos.gov (October 2026) is the source of record

Which form, filed where?

Your filing is the Articles of Organization, and it is sent to the Colorado Secretary of State.

coloradosos.gov (October 2026) is the source of record

A registered agent required?

Every LLC must name a registered agent with an in-state street address.

A person 18 or older whose home or usual place of business is in Colorado (since July 1, 2025 the person has to hold a Colorado driver's license or ID or otherwise verify residency), or a business entity in good standing with a usual place of business in Colorado. The agent has to consent.

sos.state.co.us (October 2026) is the source of record

Later-year obligations?

Periodic report: every year, $25. For timing, the state's own calendar reads: last day of the entity's anniversary month, so plan ahead of it.

Late fee: $50.

coloradosos.gov (October 2026) is the source of record

Is a service required?

Yes; your three-year bill would be the state's $100.

Services charge $397 to $597 over three years for the paperwork and the agent role.

Why this order?

Winning criterion for Colorado Registered Agent.co: three-year price, weighted 36%.

Five criteria: three-year price (36%), chores removed from your list (26%), price shown up front (15%), year-two bill (12%) and states served (11%).

Colorado Registered Agent.co: $397 for three years, $200 below Mainstay Filing.

Method

Colorado LLC requirements

RequirementDetailSource
Fee to form$50coloradosos.gov (October 2026) is the source of record
Registered agentYes, by statutesos.state.co.us (October 2026) is the source of record
Periodic report$25 every yearcoloradosos.gov (October 2026) is the source of record
State fees, 3 years$100Total of the rows above
To verify the total: filing fee, two later reports, minimum tax if one applies. Costs without a set amount are excluded.

Also asked

EIN application included?

Only Mainstay Filing includes it. Elsewhere: Colorado Registered Agent.co $99, CO Registered Agent.org $99.

What if the report is late?

A late report costs $50 more.

Three-year cost of each?

Totals over three years: Colorado Registered Agent.co at $397, Mainstay Filing at $597, CO Registered Agent.org at $397, services only.

Are the fees official?

Official Colorado sources for the state side, published prices for the service side.

Is a service required?

No. Owners can file directly. A service saves time and can act as agent.

Who ranks first in Colorado?

Rank Colorado Registered Agent.co ahead of Mainstay Filing and CO Registered Agent.org.

Sources

  1. Reference line for Colorado Secretary of State, drawn from sos.state.co.us and confirmed August 2026, as noted by our editors
  2. Reference line for Colorado Secretary of State, drawn from sos.state.co.us and confirmed August 2026, as noted by our editors
  3. Reference line for Colorado yearly filing: Periodic report, drawn from coloradosos.gov and confirmed October 2026, as noted by our editors
  4. Reference line for Colorado report due date, drawn from colorado.public.law and confirmed August 2026, as noted by our editors
  5. Reference line for Colo, drawn from sos.state.co.us and confirmed August 2026, as noted by our editors
  6. Reference line for Colorado formation fee: Filing fee, drawn from coloradosos.gov and confirmed October 2026, as noted by our editors
  7. Colorado Registered Agent.co pricing page, read November 13, 2026
  8. Mainstay Filing Colorado service page, read November 13, 2026
  9. CO Registered Agent.org pricing page, read November 13, 2026