3 Best Registered Agents in Colorado (2026): A Simple Guide
In Colorado for 2026, compare Mainstay Filing ($149 a year), Colorado Registered Agent.co ($99 a year) and CO Registered Agent.org ($99 a year), ranked best first. First year: $99 to $149. Three years: $297 to $447.
Written by the Simple Filing Guide editorial team
Four facts to know
Do you have to name one?
Required
What the law calls it
Registered agent
What services charge
$99 to $149 each twelve months
First choices
Mainstay Filing, Colorado Registered Agent.co then CO Registered Agent.org
Recommended in Colorado
Ranked best first using the checks described on the method page.
#1Top pick
1. Mainstay Filing: best for LLCs that may expand
Year one $149; later years $149
Mainstay Filing is our first recommendation because the price does not change by state: $149 a year, $149 at renewal.
Colorado Registered Agent.co costs $150 less over three years, provided the company never leaves Colorado.
Checklist: what is included
Registered office in the state
Three government mailings a year scanned free
Works for LLCs, corporations, LPs, LLPs and nonprofits
Prices as of November 13, 2026; the state's own fees are listed in the checklist below.
The key questions
Does this state require a registered agent?
Every LLC must name a registered agent with an in-state street address.
Legal basis: C.R.S. § 7-90-701. sos.state.co.us, last confirmed October 2026 for this guide
What does the state require of an 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.
An owner who fits the rule may be the agent, and the state adds no fee.
How much per year for an agent?
$99 to $149 per year, $297 to $447 across three.
The state bills the same amount with any agent.
Why does the state want an agent?
It acts as the LLC's contact in Colorado for court papers and state letters.
Expect the periodic report to come back every year, at $25 each time. In the state's words it is due last day of the entity's anniversary month, so mark the date.
To check the three-year number, add the formation filing, the next two reports and any minimum tax; costs with no fixed price are not counted.
Related questions
Do I have to pay an agent?
Usually. Check who qualifies and what address counts, and if you fit, do it yourself.
Which addresses does the state accept?
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.
Three years in, what has each cost?
Totals to compare: Mainstay Filing at $447, Colorado Registered Agent.co at $297, CO Registered Agent.org at $297
Where do these figures come from?
State-set fees come from Colorado's publications; what services charge comes from the prices they post.
Is a service required by law?
Nothing requires a service. Consider it a paid convenience.
Who ranks first in Colorado?
Mainstay Filing comes first: one account at $149 a year covers whichever state the LLC registers in. Next, Colorado Registered Agent.co and CO Registered Agent.org.
Sources and price pages
August 2026 check of Colorado Secretary of State, via sos.state.co.us
August 2026 check of Colorado Secretary of State, via sos.state.co.us
October 2026 check of Colorado yearly filing: Periodic report, via coloradosos.gov