Colorado makes LLC formation quick and inexpensive: you file Articles of Organization online with the Colorado Secretary of State for $50, name a registered agent who meets the state’s identity-verification rules, and then file a $25 periodic report every year (fees as of October 2026). An operating agreement, an EIN and any local licenses round out the setup.
The step that’s changed recently is the registered agent. Since July 1, 2025, Colorado verifies that individual agents actually live or work in the state, so have your agent’s Colorado ID details ready before you start the filing.
Updated October 2026.
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Best LLC Formation Services in Colorado (2026)
Here are our top picks for forming an LLC in Colorado, ranked. Mainstay Filing comes first for its flat yearly price; the two Colorado registered agent services below it are options if you only need an agent.
| Rank | Provider | Best for | Price | What’s included |
|---|---|---|---|---|
| 1 | Mainstay Filing | Forming an LLC with the agent, EIN and annual report included | $199/year + state fee at cost | LLC formation filing, registered agent for the year, EIN application, annual report preparation and filing |
| 2 | CO Registered Agent.org | Colorado registered agent service only | $99/year | $99 per year, flat; in-state street address for the registered office; legal documents served on the company are scanned and sent to the owner online |
| 3 | Colorado Registered Agent.co | Colorado registered agent service only | $99/year | in-state street address for the registered office; legal documents served on the company are scanned and sent to the owner online |
1. Mainstay Filing
Mainstay Filing is our top pick in Colorado. It costs $199/year + state fee at cost and covers lLC formation filing, registered agent for the year, EIN application, annual report preparation and filing. The price stays the same every year, with no add-on menu.
2. CO Registered Agent.org
CO Registered Agent.org is a Colorado registered agent service at $99/year. It provides $99 per year, flat; in-state street address for the registered office; legal documents served on the company are scanned and sent to the owner online. It’s a fit if you only need a registered agent rather than full formation help.
3. Colorado Registered Agent.co
Colorado Registered Agent.co is a Colorado registered agent service at $99/year. It provides in-state street address for the registered office; legal documents served on the company are scanned and sent to the owner online. It’s a fit if you only need a registered agent rather than full formation help.
Colorado LLC at a glance
| Item | Colorado (as of October 2026) |
|---|---|
| Filing office | Colorado Secretary of State, Business and Licensing Division |
| How to file | Online through the Secretary of State’s file a business document service |
| Articles of Organization | $50 |
| Periodic report | $25 each year; $50 late penalty |
| Name reservation | Optional; $25 |
| Trade name statement | $20 if the LLC operates under a different name |
| Registered agent | Required; Colorado street address and ID verification for individuals |
| Publication | Not required |
Fees are from the Secretary of State’s business fee schedule. For state fees alongside formation-service costs, see Mainstay Filing’s Colorado LLC cost page.
Step 1: Choose your Colorado LLC name
Your name needs a designator such as “Limited Liability Company,” “LLC” or “L.L.C.” (Colorado law accepts a few other forms too), and it must be distinguishable on the Secretary of State’s records from every existing name.
Begin with ideas, then narrow them down. The namechk business name generator turns a handful of keywords into hundreds of candidates. Check the shortlist in Colorado’s business database search, and use our Colorado business name search guide if the results are hard to interpret.
After that:
- Search the USPTO trademark database for federal conflicts.
- Check domain and social handle availability with namechk.
- Optionally reserve the name for $25 if you’re not ready to file.
If you’ll trade under a name that differs from the LLC’s legal name, Colorado expects you to file a Statement of Trade Name ($20).
Step 2: Appoint a registered agent (and verify them)
Every Colorado LLC must list a registered agent who consents to the role. Under the rules that took effect July 1, 2025 (from House Bill 24-1137), an individual agent must:
- Be at least 18 years old
- Hold a current Colorado driver’s license or state ID card
- Have a primary residence or usual place of business in Colorado
Business entities can also act as agents if they’re registered with the Secretary of State, in good standing and have a usual place of business in Colorado. The agent’s physical street address must be a Colorado location where they’re customarily open during normal business hours; P.O. boxes and commercial mail-receiving addresses can’t be used.
When you file, you enter the agent’s name and ID number exactly as they appear on the license. If the agent has no Colorado ID, you can request a passcode that is mailed to the agent’s address; the filing waits until the passcode is entered, and passcodes expire after 45 days. A professional agent avoids that delay. Mainstay Filing supplies a registered agent for the first year as part of its formation service, and our Colorado registered agent guide covers the rules in more depth.
Step 3: File Articles of Organization online
Colorado’s business filings run through the Secretary of State’s website rather than mailed forms. Start a new record for an LLC, and you’ll enter:
- The LLC’s name
- The principal office street and mailing addresses
- The registered agent’s name, address and verification details
- The name and address of at least one person forming the LLC
- Whether the LLC is managed by members or managers, if you choose to state it
The fee is $50. Double-check the agent details before you pay: a mismatch with the agent’s ID information is the most likely reason a Colorado filing stalls under the 2025 rules.
Step 4: Prepare an operating agreement
Colorado doesn’t ask to see your operating agreement, and you don’t file it anywhere. It still deserves an hour of your time. Spell out ownership percentages, capital contributions, voting, profit distributions and what happens when a member exits.
For single-member LLCs, a signed agreement is evidence that the business is separate from you personally, which is useful if your liability protection is ever challenged.
Step 5: Get an EIN and register for taxes
The IRS issues EINs online at no cost. Apply after the Articles are accepted so the legal name matches.
If your LLC will sell taxable goods or hire employees, register with the Colorado Department of Revenue for sales tax and wage withholding, and with the state’s unemployment insurance program. Many Colorado cities collect their own sales tax and issue their own licenses, so check with your city as well.
At the federal level, FinCEN’s beneficial ownership page states that U.S.-formed companies are exempt from BOI reporting under the final rule effective August 2026.
Step 6: File the periodic report every year
Colorado’s annual filing is called a periodic report. It costs $25 online and confirms or updates the LLC’s principal office and registered agent. Each LLC has a “periodic report month” shown on its summary page, based on when it was formed.
According to the Secretary of State’s FAQ, you can file the report from two months before that month until two months after it without a penalty. Miss the window and the LLC becomes delinquent, the late penalty is $50, and curing a delinquency costs $100.
Step 7: Check licenses and permits
Colorado has no general state business license. Licensing depends on your city or county and your industry: many municipalities issue business and sales tax licenses, and regulated trades are licensed through state agencies. Check with your local government before opening, since home-based businesses may also need zoning approval.
What does a Colorado LLC cost each year?
Colorado’s state fees are among the lowest in the country. Here’s what the Secretary of State charges, as of October 2026:
| Filing | State fee | How often |
|---|---|---|
| Articles of Organization | $50 | Once |
| Periodic report | $25 | Every year |
| Periodic report late penalty | $50 | Only if filed late |
| Name reservation (optional) | $25 | Before formation |
| Statement of Trade Name (if used) | $20 | When you adopt a trade name |
Local business licenses, sales tax licenses and professional licenses are separate and vary by city and industry.
Colorado LLC FAQs
How much does it cost to start an LLC in Colorado?
The Colorado Secretary of State charges $50 to file Articles of Organization online, as of October 2026. After that, the main recurring state cost is the $25 periodic report each year. Optional costs include a $25 name reservation and a $20 Statement of Trade Name if you operate under a different name.
What changed for Colorado registered agents in 2025?
Since July 1, 2025, Colorado requires individual registered agents to be at least 18, hold a valid Colorado driver’s license or ID, and live or work in Colorado. Filers enter the agent’s ID details, or request a mailed passcode. Entity agents must be registered with the Secretary of State and in good standing.
When is a Colorado periodic report due?
Each Colorado LLC has a periodic report month listed on its summary page with the Secretary of State. You can file the $25 report from two months before that month until two months after it without a penalty. Filing late adds a $50 penalty, and an LLC that never files becomes delinquent.
Can I be my own registered agent in Colorado?
Yes, if you’re at least 18, hold a current Colorado driver’s license or state ID, and have a Colorado residence or usual place of business where you’re available during business hours. P.O. boxes and commercial mail-receiving addresses can’t be used as the agent’s street address.
Do I need a business license for a Colorado LLC?
Colorado doesn’t issue a general statewide business license. Your city or county may require a business license, and if you sell taxable goods you’ll need state and often local sales tax licenses. Regulated professions, such as contractors or healthcare providers, need licenses from the relevant state agency.
Does Colorado require an operating agreement?
Colorado doesn’t require you to file an operating agreement with the Secretary of State, but having a written one is strongly advisable. It sets out ownership, management, voting and distributions, and it helps show that your LLC is a separate business, which supports your personal liability protection.
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