No.1
Number one here
1. CO Registered Agent.org: best for the least expensive year among these agents
$99 yearly, no change
Score9.6out of 10
First place: CO Registered Agent.org. It charges $99 a year, holding that price at renewal, the lowest yearly charge on this list.
Under this plan CO Registered Agent.org stands as the company's registered office with a state street address, and served papers reach you as online scans.
Its three-year total is below Mainstay Filing's, which carries considerable weight in our scoring.
In the price
- An in-state registered office address
- Legal papers served on the company are scanned to your account
Why pick it
- LLC formation offered, year-one agent service included
- $99 per year, renewing at the same price
- Undercuts Mainstay Filing on yearly cost
Weak spots
- The periodic report is yours to file
- Built for Colorado; elsewhere you need another agent
No.2
Best all-in coverage
2. Mainstay Filing: best for all fifty states
$149 yearly, no change
Score9.4out of 10
Second place: Mainstay Filing. Its agent plan is $149 a year and does not rise at renewal, and legal papers served on the company are scanned within the same business day free of charge.
For a company not yet formed, the $199 yearly package adds the Colorado filing and the periodic report.
CO Registered Agent.org costs $150 less over three years, and Mainstay Filing trails it on that criterion.
In the price
- An in-state street address on the public record
- Service of process scanned and uploaded within the same business day, at no charge
- Free scans of the first three government mailings each year
- Compliance reminders
Why pick it
- $149 a year, unchanged at renewal
- Accepts LLCs, corporations, LPs, LLPs and nonprofits
- Three government letters a year scanned at no charge
- Service of process on the company scanned within the same business day, no charge
Weak spots
- The agent plan runs $50 a year above CO Registered Agent.org
- No annual report filing on the agent-only plan
No.3
Colorado-focused
3. Colorado Registered Agent.co: best for Colorado specialists
$99 yearly, no change
Score9.1out of 10
Third place: Colorado Registered Agent.co. It charges $99 a year, holding that price at renewal, the lowest yearly charge on this list.
Colorado Registered Agent.co provides the in-state registered office and posts scans of any legal papers served there to your account.
CO Registered Agent.org and Colorado Registered Agent.co publish the same price and the same features, so either is a defensible choice.
In the price
- A physical address in the state for the registered office
- Scans of served papers appear in your online account
Why pick it
- Also forms LLCs and includes the first agent year
- A lower yearly charge than Mainstay Filing
- A yearly charge of $99 that stays the same
Weak spots
- The periodic report is yours to file
- Built for Colorado; elsewhere you need another agent
The 3 rulings in brief
| Rank | Provider | Ruling score | Yearly charge | Renewal | Suited to | Link |
|---|
| 1 | CO Registered Agent.org | 9.6 | $99 | $99/yr | The lowest yearly charge on this list | Visit CO Registered Agent.orgPartner link. We may earn money if you buy. |
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| 2 | Mainstay Filing | 9.4 | $149 | $149/yr | An agent usable in all fifty states | Visit Mainstay FilingPartner link. We may earn money if you buy. |
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| 3 | Colorado Registered Agent.co | 9.1 | $99 | $99/yr | The lowest yearly charge on this list | Visit Colorado Registered Agent.coPartner link. We may earn money if you buy. |
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Scores out of 10 are editorial marks set by The Startup Judge from the criteria on
How we rank. They are not customer ratings.
Colorado registered agent charges in 2026: year one, renewals and the three-year total
| Provider | Year one | Year two | Year three | Total over three years | Price unchanged at renewal |
|---|
| CO Registered Agent.org | $99 | $99 | $99 | $297 | Yes |
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| Mainstay Filing | $149 | $149 | $149 | $447 | Yes |
|---|
| Colorado Registered Agent.co | $99 | $99 | $99 | $297 | Yes |
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Each charge was taken from the provider's own pages on November 12, 2026. Colorado's own fees are the same whichever agent is chosen.
How the ruling was reached
The method behind these rulings gives 31% to charge over three years and 31% to work taken off the founder, with renewal conduct, fit with local rules and pricing in plain sight dividing 38%. What settled Colorado was charge over three years.
Over three years CO Registered Agent.org totals $297, $150 less than Mainstay Filing. A company that needs an agent only in Colorado gains little from fifty-state reach, so the lower yearly charge carried the ruling.
Each criterion and its weight appear on How we rank.
What Colorado requires of a registered agent (source: Colorado Secretary of State)
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. Authority: C.R.S. § 7-90-701.
The Colorado periodic report: its fee and due date
In Colorado, the periodic report comes due every year. $25 is payable to the state, and the deadline is last day of the entity's anniversary month. Filing late adds $50. Notices about it are sent to your registered agent.
Questions on Colorado registered agents
Is a Colorado LLC obliged to appoint a registered agent?
Yes. Colorado law expects every LLC to appoint a registered agent with a physical address in the state, and that appointment is public.
What is the going yearly rate for a Colorado registered agent?
Yearly charges fall between $99 to $149, and every provider holds its price at renewal.
Is the owner permitted to serve as the registered agent?
Yes, when the state's conditions are met. 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 deadline for the Colorado periodic report?
$25 goes to the state, and the filing falls due last day of the entity's anniversary month. Lateness costs $50 more.
Which registered agents were heard in this ranking?
CO Registered Agent.org ($99 a year), Mainstay Filing ($149 a year) and Colorado Registered Agent.co ($99 a year), ruled upon in that order.
Which Colorado registered agent does the record favor?
CO Registered Agent.org, since it concentrates on Colorado at $99 a year and supplies an in-state street address for the registered office.
The record
- Colorado Secretary of State, on the record as of August 2026
- Colorado Secretary of State, on the record as of August 2026
- Colorado yearly filing: Periodic report, official source, on the record as of October 2026
- Colorado report due date, on the record as of August 2026
- Colo. Rev. Stat. § 7-80-203, on the record as of August 2026
- Colorado formation fee: Filing fee, official source, on the record as of October 2026
- Exhibit: CO Registered Agent.org, pricing and service pages, November 12, 2026
- Exhibit: Mainstay Filing, Colorado service page, November 12, 2026
- Exhibit: Colorado Registered Agent.co, pricing and service pages, November 12, 2026