Registered agent required
Yes
sos.state.co.us, checked October 2026
Registered agent guide · Colorado
Colorado Registered Agents (2026): State Rules, Fees and the 3 Best Agents
Our 2026 recommendation for a registered agent in Colorado, best first: Mainstay Filing ($149 a year), CO Registered Agent.org ($99 a year) and Colorado Registered Agent.co ($99 a year). Every Colorado LLC is required to name a registered agent. Counting the state's repeating fees, a year costs $25, or 19th of 50.
The Colorado fee sheet
19th
on the 50-state list, yearly basis
The smaller the number, the less the state charges (tied). The whole table
Periodic report
$25 / yr
The state sets the deadline as last day of the entity's anniversary month. coloradosos.gov, checked October 2026
State charges, per year
$25
The state side of a single year
Services that file for you, for Colorado
The order follows five published criteria. They are set out on the methodology page.
1. Mainstay Filing: best for one provider for all fifty states
$149 yearly, renewing at $149
Mainstay Filing takes the top place, as $149 yearly in Colorado and the same everywhere else, with a renewal price of $149.
You pay $150 more than at CO Registered Agent.org across three years and, in return, more filings are done for you.
What the price buys
- A real office address inside the state
- Anything served on the company is scanned and sent to you that business day, free of charge
- The first three letters from government agencies each year are scanned at no charge
- Also open to nonprofits, partnerships and corporations, not only LLCs
In its favor
- Price $149, renewal $149
- Works in every state
Against it
- $50 extra a year compared with CO Registered Agent.org
- The agent plan does not file reports
2. CO Registered Agent.org: best for a small flat agent fee
$99 yearly, renewing at $99
Number 2 is CO Registered Agent.org: a plan for Colorado alone at $99 a year, with a renewal price of $99.
What the price buys
- A physical Colorado location for the office
- Process served on the company is scanned and uploaded
In its favor
- Its yearly price sits under Mainstay Filing's
- A flat $99 a year
Against it
- No coverage outside this state
- Periodic report stays with you
3. Colorado Registered Agent.co: best for a local agent
$99 yearly, renewing at $99
Number 3 is Colorado Registered Agent.co: a plan for Colorado alone at $99 a year, with a renewal price of $99.
Its published prices match CO Registered Agent.org's exactly, so the two sit side by side.
What the price buys
- A physical Colorado location for the office
- Process served on the company is scanned and uploaded
In its favor
- A flat $99 a year
- Its yearly price sits under Mainstay Filing's
Against it
- No coverage outside this state
- Periodic report stays with you
Prices side by side
| No. | Service | Yearly price | Renews at | Service charges, three years | |
|---|---|---|---|---|---|
| 1 | Mainstay Filing | $149 | $149/yr | $447 | Visit Mainstay FilingPartner link. We may earn money if you buy. |
| 2 | CO Registered Agent.org | $99 | $99/yr | $297 | Visit CO Registered Agent.orgPartner link. We may earn money if you buy. |
| 3 | Colorado Registered Agent.co | $99 | $99/yr | $297 | Visit Colorado Registered Agent.coPartner link. We may earn money if you buy. |
Prices come from each company's own pages and were copied on November 12, 2026. State charges stay the same with any agent.
Colorado agent and upkeep calculator
Each agent's price is combined with the state charges that repeat (the periodic report from year two). Formation fees are not in the total.
Colorado next to the states ranked around it
The complete ranking applies one method to all fifty states.
The registered agent requirement in Colorado
Every LLC must name a registered agent with an in-state street address. 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.
Persons the state allows: 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. Authority: C.R.S. § 7-90-701.
The state charges that repeat
Besides the agent, the LLC files the periodic report every year for $25, due last day of the entity's anniversary month. Late filings add $50.
Why the list reads this way
Of our five criteria, paperwork the price takes on (26%) is what put Mainstay Filing above CO Registered Agent.org in Colorado.
Coverage of all fifty states beat CO Registered Agent.org on our weights.
Questions and answers
Does every Colorado LLC need a registered agent?
Yes. Every LLC must name a registered agent with an in-state street address.
Who may act as the registered agent for Colorado LLCs?
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.
What is the yearly price of registered agent service for Colorado?
Budget $99 to $149 each year.
What does the state itself charge an LLC each year?
About $25 a year by our yearly measure, which comes from the periodic report ($25 every year).
Which registered agents are recommended on this page?
Mainstay Filing ($149 a year), CO Registered Agent.org ($99 a year) and Colorado Registered Agent.co ($99 a year), ranked from best to last.
Which registered agent is the best choice?
Mainstay Filing first, then CO Registered Agent.org and Colorado Registered Agent.co. What separates Mainstay Filing is paperwork the price takes on.
Sources for this chapter
- sos.state.co.us supplies Colorado Secretary of State, last opened August 2026
- sos.state.co.us supplies Colorado Secretary of State, last opened August 2026
- coloradosos.gov supplies Colorado yearly filing: Periodic report, official source, last opened October 2026
- colorado.public.law supplies Colorado report due date, last opened August 2026
- sos.state.co.us supplies Colo, last opened August 2026
- coloradosos.gov supplies Colorado formation fee: Filing fee, official source, last opened October 2026
- corporations.utah.gov supplies Utah Division of Corporations and Commercial Code, last opened August 2026
- corporations.utah.gov supplies Utah Division of Corporations and Commercial Code, last opened August 2026
- sosmt.gov supplies Montana Secretary of State fee page and fee, last opened October 2026
- sosmt.gov supplies Montana yearly filing: Annual report: fee, official source, last opened October 2026
- sosmt.gov supplies Montana yearly filing: Annual report: fee, official source, last opened October 2026
- michigan.gov supplies Michigan Department of Licensing and Regulatory Affairs, Corporations, last opened August 2026
- michigan.gov supplies Michigan Department of Licensing and Regulatory Affairs, Corporations, last opened August 2026
- sos.ok.gov supplies Oklahoma Secretary of State, Business Filing Department, last opened August 2026
- sos.ok.gov supplies Oklahoma Secretary of State, Business Filing Department, last opened August 2026
- Colorado service page at Mainstay Filing, noted November 12, 2026
- Pricing page at CO Registered Agent.org, noted November 12, 2026
- Pricing page at Colorado Registered Agent.co, noted November 12, 2026