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LLC Straight Talk What it costs, what you have to file, who's worth paying.

Here's the deal · Colorado

3 Best Registered Agents in Colorado (2026), No Fluff

Colorado, 2026: CO Registered Agent.org ($99 a year), Mainstay Filing ($149 a year) and Colorado Registered Agent.co ($99 a year) are our picks for registered agents, in that order. An agent runs $99 to $149 for year one and $297 to $447 for three years.
Straight from the LLC Straight Talk editorial team

The short of it

The short of it
Do you have to?
Yes, you have to
What the law calls it
Registered agent
What agents charge
$99 to $149 a year
Who we'd use
CO Registered Agent.org, Mainstay Filing then Colorado Registered Agent.co

Who we'd use in Colorado

Prices come from each company's own page. Here's how we judge.

#1 Our top pick

1. CO Registered Agent.org: best for one-state businesses

Year one's $99, later years $99

CO Registered Agent.org wins the top spot: you get an agent in the state for $99 a year.

Its three-year total's under Mainstay Filing's, which makes it the first pick for a company that stays put.

What you get

  • A local address on file
  • Scans of legal papers

Pluses

  • Smaller yearly bill than the national pick
  • $99 each year, no increase

What's not

  • No coverage outside the state
  • You're stuck filing the periodic report
Check CO Registered Agent.org Partner link. We may earn money if you buy.
#2 Works in all 50 states

2. Mainstay Filing: best for one price in every state

Year one's $149, later years $149

Mainstay Filing takes second place: the price doesn't change by state, $149 a year, and renewal is $149.

It ranks lower because three years cost $150 more than CO Registered Agent.org, and price is the biggest test.

What you get

  • An in-state street address on record
  • Scans of three government letters a year, free
  • Handles corporations, LPs, LLPs and nonprofits as well as LLCs

Pluses

  • One account works in any state
  • $149 a year, flat at renewal

What's not

  • The yearly bill's $50 higher
  • Agent only, no report filing
Check Mainstay Filing Partner link. We may earn money if you buy.
#3 Colorado specialist

3. Colorado Registered Agent.co: best for another in-state choice

Year one's $99, later years $99

Colorado Registered Agent.co comes in third because you get an agent in the state for $99 a year.

It charges what CO Registered Agent.org charges.

What you get

  • A local address on file
  • Scans of legal papers

Pluses

  • $99 each year, no increase
  • Smaller yearly bill than the national pick

What's not

  • No coverage outside the state
  • You're stuck filing the periodic report
Check Colorado Registered Agent.co Partner link. We may earn money if you buy.

The numbers

#WhoYear oneEach year afterThree-year totalWhat you get
1 CO Registered Agent.org $99$99/yr$297A local address on file; scans of legal papers Check CO Registered Agent.org Partner link. We may earn money if you buy.
2 Mainstay Filing $149$149/yr$447An in-state street address on record; scans of three government letters a year, free; Handles corporations, LPs, LLPs and nonprofits as well as LLCs Check Mainstay Filing Partner link. We may earn money if you buy.
3 Colorado Registered Agent.co $99$99/yr$297A local address on file; scans of legal papers Check Colorado Registered Agent.co Partner link. We may earn money if you buy.

Prices as of November 13, 2026. The state's own fees are in the checklist below.

The questions that matter

Does the state make me have a registered agent?

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

Statute: C.R.S. § 7-90-701. sos.state.co.us, confirmed October 2026, if you don't believe us

Who can be the agent?

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.

If you qualify, name yourself and you won't pay an agent.

What does an agent cost?

You're looking at $99 to $149 a year for the services we'd use, $297 to $447 across three years.

The state's fees stay the same whoever you name.

What does an agent actually do?

It takes delivery of lawsuits and official state mail for the LLC at an address in Colorado.

What matters is that nothing important sits there unnoticed while you're away. Service of process, decoded

What else does the state bill every year?

You'll file the periodic report every year, and it's $25 each time. Here's the date the state gives: last day of the entity's anniversary month. Don't miss it.

coloradosos.gov, confirmed October 2026, if you don't believe us

Why this order?

CO Registered Agent.org scores best on money out the door in three years, and that test is worth 35%.

65% of the score comes from money out the door in three years and jobs the price actually covers.

Do the math: CO Registered Agent.org is $297 for three years, and that's $150 less than Mainstay Filing.

How we judge

Colorado: the agent checklist

WhatDetailCheck it
Fee to form $50coloradosos.gov, confirmed October 2026, if you don't believe us
Registered agent Yes, you have tosos.state.co.us, confirmed October 2026, if you don't believe us
Periodic report $25 every yearcoloradosos.gov, confirmed October 2026, if you don't believe us
State fees, years one to three $100Our sum of the rows above

Every line above links to the state's own page. The total's ours: the filing, two reports and any minimum tax.

Still wondering?

Can I be my own agent?

Usually. If you fit the state's rule on who qualifies and which address counts, go ahead.

What address does an agent need?

The address has to be a physical address in Colorado, either a home or a usual place of business. P.O. boxes are not accepted.

What do the picks cost over three years?

CO Registered Agent.org comes out at $297; Mainstay Filing comes out at $447; Colorado Registered Agent.co comes out at $297

Where do these numbers come from?

Official Colorado sources back the state side, and posted prices back the service side.

Do I have to use a service?

No law says you need a service. It's a convenience you pay for.

What's the best registered agent in Colorado?

Go with CO Registered Agent.org first, then look at Mainstay Filing and Colorado Registered Agent.co.

What's next

Sources, so you can check

  1. Where Colorado Secretary of State comes from: sos.state.co.us, confirmed August 2026, and you can go look yourself
  2. Where Colorado Secretary of State comes from: sos.state.co.us, confirmed August 2026, and you can go look yourself
  3. Where Colorado yearly filing: Periodic report comes from: coloradosos.gov, confirmed October 2026, and you can go look yourself
  4. Where Colorado report due date comes from: colorado.public.law, confirmed August 2026, and you can go look yourself
  5. Where Colo comes from: sos.state.co.us, confirmed August 2026, and you can go look yourself
  6. Where Colorado formation fee: Filing fee comes from: coloradosos.gov, confirmed October 2026, and you can go look yourself
  7. CO Registered Agent.org pricing page, read November 13, 2026
  8. Mainstay Filing Colorado service page, read November 13, 2026
  9. Colorado Registered Agent.co pricing page, read November 13, 2026