What an LLC Operating Agreement Is — Purpose, Why It Matters Even for Single-Member LLCs, and the Default Rules Problem
Example Contract Language
"This Limited Liability Company Agreement (the "Agreement") of [Company Name], LLC (the "Company"), is entered into as of [Date] by and among the persons named on Exhibit A hereto (each a "Member" and collectively the "Members"). The Members intend to form a limited liability company under the [State] Limited Liability Company Act (the "Act") and to set forth the respective rights, duties, and obligations of the Members and the Company as set forth herein. To the extent this Agreement is silent on a matter, the provisions of the Act shall govern."
An LLC operating agreement is a legally binding contract among the LLC's members (owners) — and between the members and the LLC itself — that governs how the company is owned, managed, and operated. It is the foundational governance document for every LLC, regardless of size, industry, or number of members. Despite its critical importance, millions of LLCs operate without one — relying instead on the default rules of state law, which frequently produce outcomes no member would have chosen.
Purpose. The operating agreement serves three core functions: (1) it establishes the economic terms of each member's ownership — capital contributions, profit and loss allocation, and distribution rights; (2) it defines governance — who has authority to make decisions, how major decisions require member approval, and what happens when members disagree; and (3) it provides exit and continuity mechanisms — what happens when a member wants to leave, dies, becomes disabled, goes bankrupt, or is involved in a divorce, and whether the LLC continues or winds down.
Why It Matters Even for Single-Member LLCs. Many single-member LLC owners assume an operating agreement is unnecessary because there are no partners to negotiate with. This assumption is costly in three ways. First, most banks require a signed operating agreement before opening a business bank account or approving a line of credit. Second, without a written operating agreement, courts and creditors may question whether the LLC formalities are being observed — a factor in veil-piercing analysis that can expose the single member's personal assets to business creditors. Third, a written operating agreement allows the single-member LLC to customize its governance: designating a successor if the member dies or becomes incapacitated; setting rules for the member's estate and heirs; and making elections (like opting out of default management rules that might not apply cleanly to a one-person operation).
The Default Rules Problem. When an LLC lacks an operating agreement — or has one that is silent on a key issue — state law fills the gap with default rules. These defaults vary by state and are often counterintuitive. Common state-law defaults that surprise LLC owners: (1) Equal profit sharing regardless of unequal capital contributions — under many Uniform LLC Act states, members share profits and losses equally by headcount, not by ownership percentage, unless the agreement specifies otherwise; (2) Equal voting rights regardless of ownership — a 90% owner and a 10% owner may each have one vote on member matters; (3) Unanimous consent required for most major decisions — default rules in many states require all members to agree to admit new members, transfer interests, or make major changes, which can create deadlock; (4) Automatic dissolution upon a member's dissociation — some states dissolve the LLC when any member leaves, dies, or goes bankrupt, unless the agreement provides otherwise. Every one of these defaults can be contracted around in a well-drafted operating agreement.
The Written Agreement Requirement. Most states do not require an LLC to have a written operating agreement — the agreement can be oral or implied from the parties' conduct. However, oral operating agreements are profoundly dangerous: they are unenforceable in many dispute contexts, impossible to prove precisely when disputes arise, and courts default to statutory rules when oral terms are unclear. A written, signed operating agreement is the baseline protection for every LLC member. In Delaware, for instance, the LLC Act expressly permits the operating agreement to be oral — but Delaware's sophisticated chancery court regularly resolves LLC disputes by reference to the written agreement, and members without one are exposed to full statutory default rules. Always get it in writing.
What to Do
If your LLC does not have a written operating agreement, draft one before any dispute arises — the time to negotiate is before you need it, not during a conflict. If you have a boilerplate or template agreement, review it against the provisions in this guide to identify what is missing or inadequately addressed. For single-member LLCs, at minimum include: a successor designation, a veil-piercing protective recital, and a statement of your capital contribution. For multi-member LLCs, treat this guide as a checklist.