Registered agent ratings · Colorado
3 Best Registered Agents in Colorado (2026)
1. Colorado Registered Agent.co: best for the lowest yearly amount on this list
$99 a year, level on renewal
Colorado Registered Agent.co is rated first: $99 a year, flat, with online scans of legal papers served.
Colorado Registered Agent.co supplies the state street address for the registered office and posts scans of served papers to your account.
Across three years it costs less than Mainstay Filing, and cost carries heavy weight in the rating.
What you get
- An in-state address on the public record
- Scans of legal papers served on the company, posted online
Pros
- Yearly amount $99, unchanged when it renews
- Also forms LLCs and includes the first agent year
- A smaller yearly line than Mainstay Filing
Trade-offs
- The periodic report remains your own filing
- Colorado only; other states need another agent
2. Mainstay Filing: best for any state
$149 a year, level on renewal
Mainstay Filing is rated second: $149 yearly for an agent that stays with the company if it moves or expands, plus free scans of the first three government mailings each year.
Company not formed yet? Mainstay's $199-a-year package puts the Colorado filing and the periodic report on one line.
Colorado Registered Agent.co is $150 cheaper on the three-year sum, and that lowers Mainstay Filing's cost rating.
What you get
- A physical in-state address as the registered office
- No-fee scans of service of process on the day it is received
- Three government mailings a year scanned free
- Compliance reminders
Pros
- $149 a year, level on renewal
- Same-business-day scans of service of process, no fee
- Accepts LLCs, corporations, LPs, LLPs and nonprofits
- Government mail scanned free, first three pieces a year
Trade-offs
- Agent alone is $50 a year above Colorado Registered Agent.co
- Annual reports are filed on the formation package only
3. CO Registered Agent.org: best for businesses in Colorado
$99 a year, level on renewal
CO Registered Agent.org is rated third: $99 a year, flat, with online scans of legal papers served.
Through CO Registered Agent.org, the company's registered office has a street address in the state, and served legal papers are scanned online.
CO Registered Agent.org copies Colorado Registered Agent.co on amounts and plan features, so there is little between them.
What you get
- An in-state address on the public record
- Served papers are scanned and placed in your online account
Pros
- $99 per year and the same at renewal
- LLC formation offered, with year-one agent service
- A lower yearly amount than Mainstay Filing
Trade-offs
- The periodic report remains your own filing
- Colorado only; other states need another agent
The 3 ratings summarized
| Line | Service | Rating | Yearly amount | Renewal amount | Best for | Open |
|---|---|---|---|---|---|---|
| 1 | Colorado Registered Agent.co | 9.1 | $99 | $99/yr | The lowest yearly price we rank here | Visit Colorado Registered Agent.coPartner link. We may earn money if you buy. |
| 2 | Mainstay Filing | 8.6 | $149 | $149/yr | A single agent in any state | Visit Mainstay FilingPartner link. We may earn money if you buy. |
| 3 | CO Registered Agent.org | 8.5 | $99 | $99/yr | The lowest yearly price we rank here | Visit CO Registered Agent.orgPartner link. We may earn money if you buy. |
Colorado registered agent amounts for 2026: year one, renewal and three-year sum
| Service | Year one | Year two | Year three | Three-year sum | Same amount on renewal |
|---|---|---|---|---|---|
| Colorado Registered Agent.co | $99 | $99 | $99 | $297 | Yes |
| Mainstay Filing | $149 | $149 | $149 | $447 | Yes |
| CO Registered Agent.org | $99 | $99 | $99 | $297 | Yes |
Why the order looks like this
The rating method counts cost over years one to three and inclusions per price at 27% each and splits 46% among renewal price and terms, fit with state rules and price clarity. For Colorado, cost over years one to three was the deciding line.
Colorado Registered Agent.co sums to $297 across three years, $150 below Mainstay Filing. For a company that needs an agent in Colorado only, fifty-state coverage adds little, so the lower yearly amount decided the rating.
Each criterion and its weight is listed on How we rank.
Colorado registered agent requirements per Colorado Secretary of State (official)
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 cited: C.R.S. § 7-90-701.
The Colorado periodic report: amount, date and agent
Colorado LLCs owe the periodic report every year, due last day of the entity's anniversary month. Amount: $25. Late filing adds $50. The state sends notices about it to your registered agent.
Colorado registered agent: your questions
Does a Colorado LLC need to appoint a registered agent?
It does. Colorado treats a registered agent as a standing requirement, and the agent needs a street address within the state.
What is the yearly price of a registered agent in Colorado?
Yearly amounts run $99 to $149, and each holds on renewal.
Is it permitted to be your own 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.
On what date is the Colorado periodic report due?
Due last day of the entity's anniversary month. Fee: $25. Late penalty: $50.
Which registered agents are rated on this page?
Colorado Registered Agent.co ($99 a year), Mainstay Filing ($149 a year) and CO Registered Agent.org ($99 a year), highest rated first.
Which Colorado registered agent has the best value rating?
Colorado Registered Agent.co, as $99 a year, level on renewal, the lowest yearly price on this list.
Source lines
- Colorado Secretary of State (ledger date August 2026)
- Colorado Secretary of State (ledger date August 2026)
- Colorado yearly filing: Periodic report, official source (ledger date October 2026)
- Colorado report due date (ledger date August 2026)
- Colo. Rev. Stat. § 7-80-203 (ledger date August 2026)
- Colorado formation fee: Filing fee, official source (ledger date October 2026)
- Colorado Registered Agent.co, pricing and service pages: amounts read November 12, 2026
- Mainstay Filing, Colorado service page: amounts read November 12, 2026
- CO Registered Agent.org, pricing and service pages: amounts read November 12, 2026