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Plain CharterLLC questions, short answers.

Short answers · Colorado

3 Best LLC Services in Colorado (2026), Plainly Answered

We'd pick Colorado Registered Agent.co ($199), Mainstay Filing ($199) and CO Registered Agent.org ($199) in Colorado for 2026, in that order. On top of the $50 filing fee, the services cost $397 to $597 over three years.

By the Plain Charter editorial team ·

The short answer

What the state charges
$50, at filing
After year one
$25 each year
Registered agent
Required
Our picks, in order
Colorado Registered Agent.co, Mainstay Filing then CO Registered Agent.org

Who to use in Colorado

The order follows our five criteria, led by cost and coverage.
1Best overall

1. Colorado Registered Agent.co: best for a lean start

$199 to start, $99 yearly

Colorado Registered Agent.co leads our list: it costs $199 up front with the first agent year, then $99 each year after.

It beats Mainstay Filing on three-year cost, the factor we weigh most.

Its price does not cover the periodic report.

The price covers

  • The Colorado formation filing
  • Agent included, year one

Upsides

  • Forms the LLC for $199
  • $99 a year from year two
  • First agent year in the price

What to weigh

  • No help with the periodic report
  • EIN not included ($99)
Visit Colorado Registered Agent.coPartner link. We may earn money if you buy.
2All fifty states

2. Mainstay Filing: best for owners who want the upkeep handled

$199 a year ($249 due at signup with the state fee)

Mainstay Filing comes second: one yearly price of $199 covers the filing, the registered agent and each periodic report.

Three years cost $200 more than Colorado Registered Agent.co.

You never file the periodic report yourself; only the state's $25 is added.

The price covers

  • Your LLC filed with the state
  • Registered agent for twelve months
  • Periodic report filed for you
  • EIN request filed
  • State fees at cost

Upsides

  • $199 a year for everything listed
  • Year two costs $199
  • Handles the EIN application

What to weigh

  • A $100 yearly premium over Colorado Registered Agent.co
Visit Mainstay FilingPartner link. We may earn money if you buy.
3Colorado only

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

$199 to start, $99 yearly

CO Registered Agent.org ranks third, because it costs $199 up front with the first agent year, then $99 each year after.

Its price does not cover the periodic report.

It charges the same as Colorado Registered Agent.co; the order between them is a close call.

The price covers

  • The Colorado formation filing
  • Agent included, year one

Upsides

  • Forms the LLC for $199
  • First agent year in the price
  • $99 a year from year two

What to weigh

  • No help with the periodic report
  • EIN not included ($99)
Visit CO Registered Agent.orgPartner link. We may earn money if you buy.

How the picks compare

#PickFirst yearRenewal priceThree-year totalYou get
1Colorado Registered Agent.co$199$99/yr$397The Colorado formation filing; agent included, year oneVisit Colorado Registered Agent.coPartner link. We may earn money if you buy.
2Mainstay Filing$199$199/yr$597Your LLC filed with the state; registered agent for twelve months; periodic report filed for youVisit Mainstay FilingPartner link. We may earn money if you buy.
3CO Registered Agent.org$199$99/yr$397The Colorado formation filing; agent included, year oneVisit CO Registered Agent.orgPartner link. We may earn money if you buy.
Prices as published on November 12, 2026. The state's own fees are listed in the requirements below.

Common questions

How much will forming the LLC cost?

Filing yourself costs $50. With a service, add $199.

Counting the recurring report, the state's own fees reach $100 by the end of year three. October 2026 · coloradosos.gov

Which form creates the LLC?

The LLC starts life when the Colorado Secretary of State accepts the Articles of Organization.

October 2026 · coloradosos.gov

Is 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.

October 2026 · sos.state.co.us

Are there yearly fees?

Mainly the periodic report, once a year. Fee: $25. Deadline: last day of the entity's anniversary month.

Late filers pay $50.

October 2026 · coloradosos.gov

Can I do it without a service?

Yes, and then the cost is the state's $100 over three years.

The services charge $397 to $597 across three years for that work.

How did you rank them?

Because of three-year cost: Colorado Registered Agent.co does best there, and it counts for 35%.

Three-year cost counts for 35% and what the price takes off your plate for 30%; the other three criteria are smaller.

Colorado Registered Agent.co keeps $200 in your pocket over three years compared with Mainstay Filing.

Read our criteria

Requirements, cited

RequirementAnswerSource
State filing fee$50October 2026 · coloradosos.gov
Registered agentRequiredOctober 2026 · sos.state.co.us
Periodic report$25 every yearOctober 2026 · coloradosos.gov
State fees, first three years$100Our sum of the fees above
We add the filing, two years of reports and any minimum tax for the three-year line. Publication and other variable costs are excluded.

A few more questions

What about the EIN?

Mainstay Filing applies for it at no extra cost. Colorado Registered Agent.co adds $99; CO Registered Agent.org adds $99.

What happens if I miss the report?

A $50 late fee.

What do the picks cost over three years?

Colorado Registered Agent.co $397, Mainstay Filing $597 and CO Registered Agent.org $397, plus state fees.

Where do these figures come from?

Official schedules for state fees, company pricing for service fees, all dated on this page.

Do I need to hire a service?

No. The state accepts filings from owners; a service saves time and handles the agent role.

Which LLC service would you pick in Colorado?

First Colorado Registered Agent.co, then Mainstay Filing and CO Registered Agent.org.

Official sources and prices

  1. sos.state.co.us · Colorado Secretary of State · August 2026
  2. sos.state.co.us · Colorado Secretary of State · August 2026
  3. coloradosos.gov · Colorado yearly filing: Periodic report · October 2026
  4. colorado.public.law · Colorado report due date · August 2026
  5. sos.state.co.us · Colo · August 2026
  6. coloradosos.gov · Colorado formation fee: Filing fee · October 2026
  7. Prices from the Colorado Registered Agent.co pricing page on November 12, 2026
  8. Prices from the Mainstay Filing Colorado service page on November 12, 2026
  9. Prices from the CO Registered Agent.org pricing page on November 12, 2026