Do You Need an Operating Agreement for an LLC?

Many founders focus on the state filing when they form an LLC. They choose the state, file the Articles of Organization or Certificate of Organization, appoint a registered agent, pay the state fee, and assume the company is ready to do business. Technically, the LLC may already exist after state approval. Practically, however, the company still needs internal rules. This is where the Operating Agreement becomes important.

An Operating Agreement is not always filed with the state, and in many states, it is not legally mandatory for every LLC. Still, from our experience at Corporate Mile, it is one of the most important documents an LLC owner should have, especially when the business has more than one member, foreign ownership, banking needs, or future expansion plans.

As of 2026, here is what LLC owners should understand.

What Is an LLC Operating Agreement?

An LLC Operating Agreement is the internal document that explains how the company is owned, managed, and operated. It defines the relationship among members, the authority of managers, the rules for voting, the distribution of profits, and what happens if ownership changes in the future.

Unlike formation documents, the Operating Agreement is usually not submitted to the Secretary of State. It is kept internally by the company and serves as the LLC’s main governance document. The state filing creates the company. The Operating Agreement explains how the company works.

This distinction matters because many founders confuse formation with internal governance. Filing the LLC with the state gives the company legal existence, but it does not automatically solve ownership, management, or profit-sharing questions.

Is an Operating Agreement Legally Required?

The answer depends on the state where the LLC is formed. Some states require LLCs to adopt an Operating Agreement, while others leave it optional but rely on default statutory rules when no internal agreement exists. In most cases, even when an Operating Agreement is required or expected, it is kept internally and is not filed with the state.

For example, New York expressly requires members to adopt a written Operating Agreement, while states such as California and Missouri give the Operating Agreement an important statutory role and generally treat it as a core internal governance document. Other states may not require the document in the same way, but the absence of one can still create practical and legal problems.

Because LLCs are formed under state law, there is no single federal rule that applies equally to every LLC in the United States. This is why founders should not assume that an Operating Agreement is optional simply because it is not submitted during formation.

Why an Operating Agreement Matters

An Operating Agreement matters because it replaces uncertainty with written rules. Without one, the LLC is generally governed by the state’s default rules, which may not reflect what the owners actually want.

For example, state default rules may not align with members’ actual capital contributions, management expectations, voting arrangements, or profit distribution agreements. This can become a serious issue when members disagree.

If there is no written Operating Agreement, disputes may become harder to resolve because there is no internal document explaining what the members agreed to. For a business with two or more owners, this can create unnecessary risk from the beginning.

What Should an Operating Agreement Include?

A properly prepared Operating Agreement should reflect how the LLC actually operates. It usually includes ownership percentages, member contributions, management structure, voting rights, profit distribution, rules for adding or removing members, procedures for selling ownership interests, and what happens if a member leaves or dies.

It should also explain who has the authority to sign contracts, open bank accounts, approve major business decisions, and represent the LLC in operational matters. For a single-member LLC, the document is simpler, but it still has value. It confirms that the company is separate from the owner and that the owner intends to operate through a legal entity rather than personally.

For a multi-member LLC, the Operating Agreement is much more important because it becomes the internal contract between the owners.

Operating Agreement for a Single-Member LLC

Many single-member LLC owners believe they do not need an Operating Agreement because there are no partners or internal disputes to manage. That assumption is risky.

A single-member LLC should still have an Operating Agreement because it helps document the separation between the owner and the company. This separation is one of the reasons founders create an LLC in the first place. Banks, payment processors, landlords, lenders, and business partners may also ask for the Operating Agreement when reviewing the company.

Even if nobody asks for it at formation, the document can become important later when opening accounts, applying for financing, signing contracts, or proving that the company is properly organized. For non-US founders, the Operating Agreement can be especially useful when dealing with banks or financial institutions that need to understand the company’s ownership and management structure.

Operating Agreement for a Multi-Member LLC

For a multi-member LLC, the Operating Agreement is essential. When there are two or more owners, the company needs clear rules about money, authority, voting, exits, and disputes.

Without written rules, members may later disagree over who owns what, who can make decisions, how profits should be distributed, or what happens if one member wants to leave. These issues are much easier to handle before a conflict appears.

A good Operating Agreement should make ownership and management expectations clear from the beginning. It should not be treated as a generic template that nobody reads. The document should match the real business relationship between the members.

Does the Operating Agreement Affect Liability Protection?

An Operating Agreement does not create limited liability by itself. The LLC structure is what provides the liability shield. However, the Operating Agreement can help show that the LLC is being treated as a real company with its own internal rules, records, and governance.

This can matter if someone later argues that the business is not truly separate from the owner. For this reason, the Operating Agreement should be part of a broader compliance approach. The LLC should also maintain separate bank accounts, proper records, contracts in the company name, and accurate tax filings.

The Operating Agreement is not the only document that protects the company, but it also supports the legal separation that LLC owners rely on.

Do Banks Require an Operating Agreement?

Many banks and financial institutions ask for an Operating Agreement when opening a business bank account for an LLC. This is especially common when the LLC has more than one member, foreign owners, or a management structure that is not immediately clear from the state filing.

The bank may need to confirm who owns the company, who is authorized to act on behalf of the LLC, and who can open or manage the account. Even when the bank does not strictly require the document, having one available can make the process smoother.

For founders who want to move quickly after formation, preparing the Operating Agreement early helps avoid delays during banking and onboarding.

Should the Operating Agreement Be Filed With the State?

In most states, the Operating Agreement is not filed with the Secretary of State. It is an internal company document that should be kept with the LLC’s business records and updated when important company changes occur.

This is one reason many founders overlook it. Because the state usually does not require the document at the time of filing, owners may assume it is not important. That assumption is incorrect.

The Operating Agreement may not be part of the public filing, but it can be one of the LLC’s most important private documents.

When Should You Create the Operating Agreement?

The Operating Agreement should be prepared shortly after formation, and in many cases before the company begins serious operations. It should exist before the LLC opens a bank account, signs major contracts, accepts investment, brings in partners, or starts distributing profits.

If the company has more than one member, the document should be agreed upon before disputes become possible. It is always easier to define rules when everyone is aligned than to negotiate them after money, responsibilities, or expectations become unclear.

From our experience at Corporate Mile, delaying the Operating Agreement is one of the simplest mistakes founders can avoid.

When Should You Update an Operating Agreement?

An Operating Agreement should not be created once and forgotten. It should be reviewed when the company changes.

Common reasons to update it include adding or removing members, changing ownership percentages, appointing managers, changing profit distribution rules, admitting investors, changing the business model, or preparing the company for financing or sale.

If the document no longer reflects how the LLC actually operates, it loses practical value. A current Operating Agreement is much stronger than an old document that no longer matches the company.

What Happens If You Don’t Have One?

If your LLC does not have an Operating Agreement, the company may still legally exist, depending on the state. However, the owners may be forced to rely on state default rules, which may not reflect the actual agreement between the members.

The absence of an Operating Agreement can also create difficulties with banks, partners, investors, and buyers, as well as lead to legal disputes. For a single-member LLC, not having one may make the company look less organized. For a multi-member LLC, not having one can create serious internal risk.

In many cases, the cost of preparing the document is much lower than the cost of resolving disputes later.

An Operating Agreement is not always filed with the state, and it is not required in the same way across all states. However, every serious LLC should have one.

It defines how the company works, clarifies ownership and management, supports business banking, reduces disputes, and helps show that the LLC is being operated as a separate legal entity. For single-member LLCs, it confirms internal structure and separation. For multi-member LLCs, it is one of the most important documents the company can have.

If you are forming an LLC and want to avoid confusion after registration, the Operating Agreement should be prepared as part of the setup process, not as an afterthought.