How to Form an LLC in Colorado (2026): Real Costs, Real Steps

Colorado charges $50 to file Articles of Organization and requires a $10 annual Periodic Report filed during your LLC's anniversary month. There's no publication requirement and no franchise tax. Colorado levies a 4.40% flat corporate income tax on LLC net income if you elect corporate taxation; otherwise, profits pass through to members' personal returns taxed at Colorado's 4.40% individual rate. The state processes standard filings in 3-5 business days online. Expedited 24-hour service costs an additional $100. You'll need a registered agent with a Colorado street address—Northwest Registered Agent is the proven choice at $125/year.

Year-1 Cost Table

Colorado LLC year-1 cost breakdown (2026)
Item Cost Source
Articles of Organization (state filing fee) $50 cite
Periodic Report (annual, due anniversary month) $10 cite
Registered Agent (Northwest, 1st year) $125 cite
24-hour expedited processing (optional) $100 cite
Total first-year state + RA costs (standard) $185 cite

The 6 Steps

  1. Step 1: File Articles of Organization

    Submit the formation document to the Colorado Secretary of State. See the cost table above for the current filing fee.

  2. Step 2: Appoint a Registered Agent

    Every Colorado LLC needs a registered agent with a Colorado street address. You can serve yourself, but most founders use a commercial RA — Northwest is our default pick.

  3. Step 3: Get an EIN (Federal Employer Identification Number)

    Apply with the IRS using your stamped Articles of Organization. Free, takes 5 minutes online.

  4. Step 4: Adopt an Operating Agreement

    Required by best practice — banks routinely request it before opening business accounts.

  5. Step 5: Open a Business Bank Account

    Mercury for software/online businesses; a local credit union for cash-heavy retail. Keep personal and business finances separate from day one.

  6. Step 6: File State Tax Registrations

    Register for Colorado state taxes (sales tax permit, payroll registration if you have employees, etc.) before you transact.

Recommended Tools

Northwest vs ZenBusiness for Colorado LLCs

Verdict (as of 2026): Northwest Registered Agent is our default pick for Colorado LLCs. They publish a Colorado-specific registered-agent page (linked in the cost table) and do not upsell add-ons at checkout. ZenBusiness wins only if you want bundled formation in a single flow.

Criterion Northwest ZenBusiness
Registered-agent only price (Colorado)$125/yr$199/yr
Bundled formationOptional add-onIncluded in formation plans
Privacy (address shielding)StrongStrong
Upsells at checkoutNoneSeveral
Annual-report filing service$100/yr add-on$199/yr add-on

Frequently Asked Questions

What is Colorado's Periodic Report and when is it due?

Colorado replaced the traditional annual report with a Periodic Report due during the anniversary month of your LLC's formation. The fee is $10, payable online at coloradosos.gov. Missing the deadline triggers a $50 late fee and eventual administrative dissolution.

Does Colorado have state income tax on LLCs?

Yes. Colorado has a 4.40% flat income tax. Single-member and multi-member LLCs are pass-through by default, so profits appear on your personal Colorado return taxed at 4.40%. If you elect S-corp or C-corp taxation, the LLC itself pays 4.40% corporate tax.

Do I need to publish my Colorado LLC formation in a newspaper?

No. Colorado has no publication requirement for LLCs, unlike Arizona or New York. After filing your Articles of Organization with the Secretary of State, you're done with public notice obligations.

Can I use a PO Box for my registered agent address in Colorado?

No. Colorado statute requires a registered agent to maintain a physical street address in Colorado where service of process can be delivered during business hours. A PO Box or commercial mail receiving agency (CMRA) address is not acceptable.

How fast can I form an LLC in Colorado?

Online filings through coloradosos.gov typically process in 3-5 business days at the standard $50 rate. For an additional $100 you can request 24-hour expedited processing. Same-day and 2-hour options are not available for LLC formations.

Annual Filing Deadline

Colorado requires a $10 Periodic Report filed online during your LLC's anniversary month each year; file at coloradosos.gov/biz using your entity ID.

Authoritative Sources

Other States

Skip the research — let AthenAI form your Colorado LLC