Does Colorado Require an LLC Operating Agreement?

A Colorado LLC operating agreement is not required by state law. You can form and run an LLC in Colorado without one, and the statute defines an operating agreement broadly enough that it does not even have to be in writing.¹ Skipping it is legal. It is also, for most businesses, a decision that comes back to bite. Without an agreement, the Colorado Limited Liability Company Act steps in and writes the rules for you, and those default rules rarely match what the members actually intended.

What the Default Rules Do to Your Business

The statute is direct: the operating agreement governs, and where it is silent, the Act’s defaults control.² With no agreement at all, every governance gap gets filled by those defaults, and several of them tend to surprise members once real money or a real disagreement is on the table.

Profits and losses split by contribution value. Colorado allocates profits and losses based on the value of each member’s contributions as recorded in the company’s books, not by handshake ownership percentages or by how much work each person actually does.³ If one member put in $80,000 and another put in $20,000, the default split is 80/20 even if both members always meant to be equal partners.

Big decisions require unanimous consent. Day-to-day business runs on a majority vote of the members, or of the managers in a manager-managed LLC. But any action outside the ordinary course of business, along with any amendment to the articles of organization or to the operating agreement itself, requires the consent of every single member.⁴ One holdout can block bringing in an investor, opening a new line of business, or fixing the governance rules that caused the deadlock.

Ownership transfers are limited. A member can assign their interest, but the recipient only gets the right to distributions. They cannot vote or participate in management unless the other members admit them.⁵ A departing member’s heir or buyer can end up collecting checks with no say in how the business runs.

Dissolution has almost no built-in resolution. Under the defaults, an LLC dissolves when all members agree, when an event in the operating agreement occurs, or when the company has no members for 91 consecutive days.⁶ With no agreement setting out triggers or exit procedures, a co-member dispute has no path forward short of unanimous agreement to shut it down or a lawsuit.

Why a Written Agreement Is Still Worth Having

An operating agreement lets you replace every one of those defaults with terms you actually choose. Colorado is explicit that the agreement controls over conflicting statutory provisions, and you can put one in place before, at, or after filing your articles of organization.² There is no filing deadline, but drafting one before you start operating heads off the disputes that arise while you are still working out the rules.

Liability protection is the other reason. Colorado courts weigh several factors when deciding whether to pierce the veil and hold members personally liable, including whether the company operates as a distinct entity, whether personal and business funds are kept separate, whether records are maintained, and whether formalities are observed. A written operating agreement speaks to most of those factors by establishing formal procedures that keep the business visibly separate from its owners. An LLC operating without one looks, to a court, like a business that has not bothered to draw the line.

Banks and lenders also routinely ask to see an operating agreement before opening a business account or extending credit. Not having one can slow down basic operations.

Single-Member LLCs Are Not an Exception

Colorado’s statute specifically contemplates operating agreements for sole-owner LLCs. For a single-member company, the agreement can be a signed writing about the company’s affairs, a written agreement between the member and the company, or an unwritten agreement if the LLC has a separate manager.¹

Veil-piercing risk is arguably higher for single-member LLCs, because the line between personal and business activity blurs so easily when only one person is involved. A written agreement that spells out how business funds are handled, how the member takes distributions, and what happens if the member dies or becomes incapacitated creates a paper trail showing the LLC is a real, separate entity. It also gives instructions for transferring the business if something happens to you, which prevents the LLC from dissolving automatically after 91 memberless days.⁶

What to Put in the Agreement

Colorado allows any provisions about the LLC’s affairs and business conduct that are consistent with law.² At a minimum, address these areas:

Member contributions. Specify what each member contributed at formation, whether cash, property, or services. Because the default profit split is tied to contribution values, getting these numbers on paper correctly matters.³
Profit and loss allocation. If you want profits divided differently from the ratio of contributions, say so in writing. This is one of the most common reasons to have an agreement at all.
Management structure. State whether the LLC is member-managed or manager-managed, and describe each person’s authority. The designation affects who can bind the company in outside transactions.⁷
Voting and decision-making. The agreement can set voting on a per-capita basis, by ownership percentage, or any other method. Decide which decisions need a simple majority, a supermajority, or unanimous consent. Replacing the default unanimous-consent rule for extraordinary actions is one of the most practical steps you can take to avoid deadlock.⁸
Transfer restrictions. Set the process for selling or assigning membership interests, including rights of first refusal and the conditions for admitting a new member. Without these terms, a member can transfer the economic interest freely, but the transferee comes in with no management rights.⁵
Capital calls. Describe how additional funding requests work and what happens to a member who does not participate. Common approaches include diluting the non-participating member’s ownership or treating the extra contributions as a loan to the company.
Dissolution and winding up. Spell out the events that trigger dissolution, how assets are distributed, and how debts are settled. This avoids relying on the default rule that requires unanimous agreement to dissolve.⁶

Fiduciary Duties You Can Shape

Colorado law imposes fiduciary duties on members who manage the LLC and on appointed managers. The duty of loyalty requires them to account for property or profit derived from the business, avoid conflicts of interest, and refrain from competing with the LLC before dissolution. The duty of care requires them to avoid grossly negligent or reckless conduct, intentional misconduct, and knowing violations of law. Both carry an overarching obligation of good faith and fair dealing.⁹

Your operating agreement can clarify how those duties apply in practice. If a member also runs a separate business in a related industry, for example, the agreement can carve that activity out of the default prohibition on competition. Putting those understandings in writing before a dispute arises heads off expensive litigation over whether someone breached a duty no one discussed at the start.

Adopting and Amending the Agreement

All members should review and sign. Even though the statute does not require the agreement to be written, putting it on paper with signatures eliminates arguments about what was actually agreed.¹ The agreement can take effect as early as the LLC’s formation date, even if members sign it later.²

The operating agreement is an internal document. You do not file it with the Colorado Secretary of State; the only formation document filed with the state is your articles of organization. Keep the signed agreement with your company records alongside the articles, member ledgers, and financial statements. Having it accessible matters if a bank, an investor, or a court ever asks to see it.

One more thing worth building in from the start: amending the operating agreement requires unanimous member consent under the default rules.⁴ If you want a lower threshold, put it in the original agreement. Many LLCs allow amendments by a two-thirds or simple majority vote so a single holdout cannot freeze the company’s governance later.

1
FindLaw. Colorado Code 7-80-102 – Definitions
2
Justia. Colorado Code 7-80-108 – Effect of Operating Agreement – Nonwaivable Provisions – Statute of Frauds
3
Colorado.Public.Law. Colorado Code 7-80-503 – Sharing of Profits and Losses
4
Justia. Colorado Code 7-80-401 – Management of Limited Liability Company
5
Justia. Colorado Code 7-80-702 – Assignment of Limited Liability Company Interest
6
Justia. Colorado Code 7-80-801 – Dissolution
7
Justia. Colorado Code 7-80-405 – Members and Managers as Agents
8
Justia. Colorado Code 7-80-706 – Voting
9
FindLaw. Colorado Code 7-80-404 – Duties