How to Form an LLC in Colorado — 2026 Filing Guide

Required?

Yes

Who can serve

Colorado resident individual with a physical CO street address, or a business entity authorized to act as registered agent in Colorado (no PO boxes)

Can I serve myself?

Yes

Commercial RA cost

~$100/yr

Serving as your own RA places your Colorado street address on the public SOS record. Commercial RA services ($50–$150/yr) keep your personal address private and ensure legal mail is not missed.

Renewing or switching? Compare standalone registered agent services — Northwest, Harbor Compliance, Registered Agents Inc., InCorp, and more.

1. Search name availability with the Colorado Secretary of State Search the Colorado SOS name database at sos.state.co.us to confirm your desired LLC name is available. The name must include a valid designator (LLC, L.L.C., Limited Liability Company, etc.) and must not be deceptively similar to an existing CO entity. Optional: reserve for 120 days ($25) while you prepare documents.
2. Appoint a Colorado registered agent Designate a registered agent with a physical Colorado street address (no PO boxes). Colorado residents may self-serve as RA. Out-of-state owners use a commercial RA service ($50–$150/yr). The RA's address is required on the Articles of Organization; member addresses are not required on the public Colorado filing.
3. File the Articles of Organization ($50) File online at sos.state.co.us. The Articles require the LLC name, registered agent information, and organizer signature — member names are not required. Pay the $50 filing fee. Colorado online processing is typically 1–3 business days.
4. Draft an Operating Agreement Colorado's LLC Act (C.R.S. § 7-80-101 et seq.) provides default rules for LLCs without operating agreements. An OA governs member rights, distribution rules, management authority, voting procedures, and dissolution procedure. For multi-member LLCs, an OA is essential before any capital contributions or operational decisions. Banks will request the OA for account opening.
5. Obtain an EIN from the IRS Apply for an EIN at irs.gov/ein -- free and immediate.
6. Register for Colorado taxes (if applicable) LLCs selling taxable goods or services in Colorado must register with the Colorado Department of Revenue at mycolorado.state.co.us for a sales tax license. Colorado's state sales tax rate is 2.9%; local rates (Denver, Boulder, etc.) vary. Colorado has a 4.40% flat individual income tax; LLC pass-through income is subject to this rate for Colorado-resident members.
7. File the Periodic Report each year ($10) Colorado LLCs must file a Periodic Report each year during the anniversary month of formation. The fee is $10 for online filing — one of the lowest in the US. File at sos.state.co.us. A $10 late fee applies for missed filings; continued non-compliance results in administrative dissolution.

Colorado Limited Liability Company Act, C.R.S. § 7-80-101 et seq.; Colorado Revised Statutes Title 7; Colorado Periodic Report: C.R.S. § 7-90-301; Colorado income tax: C.R.S. § 39-22-104; IRS guidance on single-member LLC disregarded entity treatment.

Direct filing portal: https://www.sos.state.co.us/biz/BusinessEntityCriteriaExt.do

Formation context

Who should form in Colorado?

Recommended for

Colorado-based entrepreneurs in Denver, Boulder, Colorado Springs, and Fort Collins who want a low-cost, low-overhead LLC; Remote-work founders and tech entrepreneurs seeking a modern LLC statute with minimal annual compliance burden; Out-of-state investors forming a Colorado LLC for Colorado-based business activity (real estate, cannabis, outdoor industry); Small business owners who want one of the lowest annual LLC fees in the country ($10/yr Periodic Report)

Tax treatment (default)

Pass-through by default: single-member LLCs are disregarded entities (Schedule C); multi-member LLCs are partnerships (Form 1065). Colorado imposes a 4.40% flat personal income tax on Colorado-resident members' allocated LLC income. No franchise tax. No entity-level LLC income tax.

If you have no Colorado presence, forming in Colorado primarily for its low annual fee means you will also need to foreign-qualify in your home state — adding that state's filing fee and annual obligations. Form in Colorado when you actually operate there. For formation-only structures, Wyoming ($60/yr) has stronger asset-protection statutes and comparable cost.

No publication requirement in Colorado — unlike New York or Nebraska, you do not need to publish notice in a newspaper after filing.

FAQ

Common Colorado LLC formation questions

Still deciding between an LLC, sole proprietorship, S-Corp, or C-Corp? Our entity-type comparison breaks down formation cost, tax treatment, liability shield, and compliance complexity for all four structures side by side.

Once your LLC clears ~$80K in annual net profit, an S-Corp election (IRS Form 2553) typically saves $5,000–$15,000/year in self-employment taxes by splitting owner income into a W-2 salary + tax-free distributions. The election is free — Form 2553 has no IRS filing fee. The key decision factors: your net income level, a defensible reasonable-compensation salary, and the 75-day Form 2553 filing window after LLC formation.

Already operating as a sole proprietor, or wondering whether a cheap county DBA filing ($10–$100) is enough instead of forming an LLC? A DBA lets you operate under a trade name — but provides zero liability protection. Our DBA vs LLC comparison breaks down exactly when a DBA is sufficient and when you need a state LLC filing.

Missing your annual report deadline triggers late fees and — if left long enough — administrative dissolution, which voids your LLC's liability shield until reinstated. Know your Colorado deadline, fee, and the consequences of missing it.

Also see the LLC annual report requirements hub for state-by-state deadlines, fees, late penalties, and reinstatement rules.

If your LLC opens an office, hires employees, or regularly does business in another state, you must foreign-qualify there — or face fines, back taxes, and loss of standing to sue. Our foreign qualification guide covers when you need it, how to file a Certificate of Authority, and what it costs.

Your Articles of Organization are filed — now make your LLC operational. Four actions every new LLC owner needs to take:

Formation gets your LLC into existence; contracts, trademark protection, operating agreement review, and vendor-document review keep it usable. Compare subscription and per-document legal platforms before you rely on a template or pay a local attorney retainer.

Commingling personal and business funds is the #1 way LLC owners lose their liability shield. A separate business account — in your LLC's legal name, with your EIN — is the foundational act of corporate formality. Mercury, Novo, Bluevine, Relay, and Found open same-day with no monthly fees. Compare online banks vs. Chase and Bank of America.

How you pay yourself depends on your LLC's tax classification — not what you call the transfer. A disregarded single-member LLC pays via owner draw with SE tax on all net profit. An S-Corp-elected LLC splits income between a W-2 salary (FICA applies) and tax-free distributions. Getting this wrong triggers IRS audit risk and SE-tax errors.

Single-member LLCs file Schedule C with their personal Form 1040 (due April 15). Multi-member LLCs file Form 1065 by March 15. S-Corp-elected LLCs file Form 1120-S by March 15. Know your form, your deadline, and the common deductions — home office, vehicle, retirement contributions, and startup costs — before your first April filing.