What Is an LLC Operating Agreement?

An operating agreement defines how your LLC is run: ownership, profits, voting, and management. Why you need one and what to include.

An LLC operating agreement is the internal rulebook for your company. It spells out who owns what percentage, how profits are shared, how decisions get made, and what happens if a member leaves or dies. It is not filed with the state, but it is one of the most important documents your LLC will ever have.

The short answer: an operating agreement is a written contract among the members that defines how the LLC is governed. Most states do not require one, but every LLC should have one because it overrides default state rules and strengthens your liability protection.

What an operating agreement covers

A solid agreement covers ownership percentages, capital contributions, how profits and losses are allocated, voting rights, management structure, and rules for adding or removing members. It also covers what happens when a member leaves, sells their interest, or passes away.

For a multi-member LLC, the agreement is the contract that prevents disputes: it says exactly how profits are split and who has authority to act for the company. Banks and courts look to it when questions arise.

Why your LLC needs one

Without an operating agreement, your state's default LLC rules apply, and those defaults rarely match what you actually want. In many states, for example, all members are presumed to share profits equally, even if they contributed very different amounts of money or work.

The agreement also protects your limited liability. Courts are more likely to respect the separation between you and your LLC when there is a written document showing the business operates as its own entity. Banks may ask to see it when you open a business bank account.

What to include

At minimum, your operating agreement should include: member names and ownership percentages; how profits and losses are shared; voting rights and decision procedures; whether the LLC is member-managed or manager-managed; how new members are admitted; what happens on transfer, death, or departure; and how the LLC can be dissolved.

You can also add confidentiality clauses, non-compete terms, and procedures for resolving deadlocks. The more specific the agreement, the fewer surprises later.

Single-member and multi-member differences

A single-member LLC still benefits from an operating agreement. It confirms that you treat the LLC as a separate entity, which matters for liability protection, and it lets you name who takes over the business if you pass away. See our guide on single-member LLCs for details.

In a multi-member LLC, the agreement is essential because it is the contract between partners. It should also clarify how members are compensated, which connects directly to how LLC owners get paid.

How to create and update one

You can draft an operating agreement with a template or hire an attorney. Every member should sign it, and you should keep the signed copy with your business records. Review and update it whenever your ownership or management changes.

As of 2026, an operating agreement is not required for LLC formation in most states, but it is a best practice. State requirements can change, so confirm the rules on your Secretary of State's website.

Common mistakes to avoid

One common mistake is copying a template without adjusting it to your actual ownership and management structure. Another is leaving the agreement unsigned, which makes it hard to enforce if a dispute arises. Members should also avoid vague language about profit splits, since ambiguity is what leads to litigation.

Review the agreement whenever you add a member, change ownership percentages, or change how the LLC is managed. An outdated agreement can be worse than none, because it no longer reflects how the business actually runs.

Frequently Asked Questions

Is an operating agreement legally required for an LLC?

Most states do not require one, but every LLC should have one. The agreement overrides default state rules, strengthens your liability protection, and documents how the business is run. Some states do require it, so check your state's rules.

What happens if an LLC has no operating agreement?

Without an agreement, your state's default LLC rules govern ownership, profits, and management, which may not match what you intend. Disputes between members are harder to resolve, and courts are less likely to treat the LLC as a separate entity.

Does a single-member LLC need an operating agreement?

It is strongly recommended. A written agreement confirms the LLC operates as a separate entity, which protects your personal assets, and lets you designate a successor for the business. It also satisfies banks that ask for one.

What should be in an LLC operating agreement?

Include ownership percentages, profit and loss allocation, voting rights, management structure, rules for admitting or removing members, and what happens on death or departure. Add dissolution procedures and, for multi-member LLCs, dispute resolution rules.