Missouri LLC Operating Agreement: Requirements (2026)
Missouri law requires every LLC to adopt an operating agreement. Under the Missouri Limited Liability Company Act (RSMo 347.081), "the member or members shall adopt an operating agreement." It may be oral or written, but a written one is strongly recommended. It costs $0 because you never file it with the state - it is an internal record that sets ownership, management, voting, and distributions and overrides the Chapter 347 default rules where you choose.
Quick Answer
- Required?
- Yes - Missouri LLCs "shall adopt" an operating agreement (RSMo 347.081)
- Form allowed
- Oral or written - written is best practice
- Filed with the state?
- No - internal document, kept with business records; $0 fee
- Governs
- Ownership %, management, voting, distributions, transfers, dissolution
- Default rules
- Chapter 347 fills any gap the agreement leaves open
- Single-member
- Still required and recommended - supports separateness and liability protection
Is an Operating Agreement Required in Missouri?
Yes. Missouri is one of a small number of states whose LLC statute requires an operating agreement rather than merely permitting one. Under the Missouri Limited Liability Company Act, codified in Chapter 347 of the Revised Statutes of Missouri, section 347.081 provides that "the member or members of a limited liability company shall adopt an operating agreement containing such provisions as such member or members may deem appropriate." The word "shall" makes adoption mandatory. In practice, then, the rule is simple: your Missouri LLC must have an operating agreement, and you should make it a written one so its terms are clear and enforceable. For the national overview, see LLC operating agreement and what is an LLC.
Section 347.081 also declares a strong policy of freedom of contract: it is the policy of the Act "to give the maximum effect to the principle of freedom of contract and to the enforceability of operating agreements." The statute adds that an operating agreement is enforceable at law or in equity by any member. Missouri courts therefore give real weight to the terms members write down, which is exactly why a careful written agreement matters.
Oral vs Written Under RSMo 347.015
Missouri defines the operating agreement broadly. Under RSMo 347.015, the "operating agreement" means an agreement, which may be oral or written, among the members concerning the LLC's business and affairs. Because the definition includes oral agreements, an oral understanding can technically satisfy the requirement in section 347.081. That is a poor way to run a company, however: without a written record, disputes about ownership percentages, profit splits, or management authority fall back on default statutory rules and on whatever members can later prove. A written agreement is the whole point - it lets you set your own terms in advance and avoid the defaults and the arguments.
Missouri Does Not File Your Operating Agreement
The operating agreement is an internal document. You do not send it to the Missouri Secretary of State, and it is never part of the public record. The only document you file to create the LLC is the Articles of Organization, filed with the Secretary of State's Corporations Division for a $50 online fee ($105 by paper). Keep the signed operating agreement with your business records alongside your Articles, your EIN confirmation, and your bank documents. Banks, lenders, investors, and courts routinely ask to see the operating agreement even though the state never does. For the full formation walk-through, see how to form an LLC in Missouri and the general how to form an LLC guide.
What to Include in the Agreement
A thorough Missouri operating agreement typically covers the following. Each provision either overrides or supplements a default rule in Chapter 347:
- Members and ownership. Each member's name, capital contribution, and ownership (membership interest) percentage.
- Management structure. Whether the LLC is member-managed or manager-managed, and the authority of members or managers to bind the LLC.
- Voting. How votes are allocated and what threshold major decisions require.
- Profit and loss allocation and distributions. How profits, losses, and cash are shared among members.
- Capital and additional contributions. Whether members can be required to contribute more capital later.
- Transfers and buy-sell terms. Restrictions on transferring interests and what happens on a member's death, withdrawal, or buyout.
- Dissolution and winding up. How the LLC closes and distributes assets, which ties into dissolving a Missouri LLC.
The agreement should also address the LLC's registered agent and record-keeping, and it can allocate tax matters consistent with the LLC's Missouri tax filing obligations. There is no state form for the operating agreement - you draft it to fit your business.
Member-Managed vs Manager-Managed
One of the most important choices in the agreement is management structure. In a member-managed LLC, all members share authority to run the business and can bind the LLC in ordinary transactions. In a manager-managed LLC, the members appoint one or more managers (who may or may not be members) to handle day-to-day operations, while members retain authority over major decisions. Under RSMo 347.079, management of a Missouri LLC is vested in the members unless the articles of organization provide that management is vested in one or more managers. Because the election is made in the articles, your management choice should be consistent across the Articles of Organization and the operating agreement.
Single-Member vs Multi-Member Agreements
Both single-member and multi-member LLCs must have an operating agreement under Missouri law, but their emphasis differs. A multi-member agreement is mainly about the relationships between owners - ownership splits, voting, deadlock, distributions, and buy-sell terms - because those are the points members later dispute. A single-member agreement is shorter but still valuable: it documents that the LLC is a separate entity from its owner, sets who takes over if the owner dies or is incapacitated, and reinforces the limited-liability shield by showing the LLC observes formalities. Courts and banks give more weight to a single-member LLC that has a real written agreement. See single-member LLC for more.
Statutory Default Rules (Chapter 347)
Where your operating agreement is silent, the Missouri Limited Liability Company Act supplies the answer through the Chapter 347 default rules. These defaults may not match what the members actually want, which is why the agreement matters. Common defaults include the following.
| Issue | Missouri default (if the agreement is silent) |
|---|---|
| Management | Vested in the members unless the articles name managers (RSMo 347.079) |
| Voting | Statutory allocation among members; major matters need member consent |
| Distributions | Shared among members under the Chapter 347 default |
| Adding a member | Generally requires the consent of the existing members |
| Enforcement | Any member may enforce the agreement at law or in equity (RSMo 347.081) |
Chapter 347 lets members override most of these defaults in the operating agreement - that is the point of Missouri's strong freedom-of-contract policy. Drafting around the defaults is exactly what a written agreement is for. When your ownership, management, or contributions change, amend the agreement and keep the prior versions with your records.
How the Agreement Fits Your Missouri Formation Steps
The operating agreement is one piece of a complete Missouri LLC setup, and it is easiest to adopt at formation rather than after a dispute. A practical order of operations is: choose and clear an available name; appoint a Missouri registered agent with a physical in-state address; file the Articles of Organization with the Secretary of State (the $50 online fee creates the LLC); adopt your written operating agreement to satisfy RSMo 347.081; obtain a free federal EIN from the IRS; and register for any state taxes with the Missouri Department of Revenue. Missouri does not require LLCs to file an annual report, which is unusual, so your ongoing obligations center on taxes rather than a yearly state filing - see Missouri annual report for the details.
Because the agreement controls how profits, control, and exits work, review it whenever ownership or management changes and keep signed copies with your records. By default the IRS treats a single-member LLC as a disregarded entity and a multi-member LLC as a partnership; either can elect corporate or S-corporation treatment, and the operating agreement can reference that choice and coordinate with your Missouri LLC cost planning and business tax obligations.
Frequently Asked Questions
Is an operating agreement required for a Missouri LLC?
Yes. Under RSMo 347.081, the member or members of a Missouri LLC shall adopt an operating agreement. Missouri is one of the few states that requires one. It may be oral or written, but it is not filed with the Secretary of State.
Do I file my Missouri operating agreement with the state?
No. It is an internal document kept with your records. Missouri files only the Articles of Organization to create the LLC. The Secretary of State never files the operating agreement.
Does a single-member Missouri LLC need one?
Yes. RSMo 347.081 applies to single-member LLCs. A written agreement documents separateness, sets succession, and helps preserve limited liability, which courts and banks look for.
What happens if my LLC has no written operating agreement?
The Chapter 347 default rules govern by filling the gaps, and disputes fall back on what members can prove. A written agreement lets members override most defaults and control how the LLC runs.
Can a Missouri operating agreement be oral?
Technically yes. RSMo 347.015 defines the operating agreement to include oral agreements. But a written agreement is strongly recommended because oral terms are hard to prove and enforce.
Related
- LLC operating agreement (national hub)
- How to form an LLC in Missouri
- Missouri Articles of Organization
- Missouri registered agent
- Missouri LLC tax filing
- Single-member LLC
- What is an LLC?
- How to dissolve an LLC in Missouri
- California operating agreement (sibling)
- Wisconsin operating agreement (sibling)
Sources
- Missouri Revisor of Statutes - RSMo 347.081 (members "shall adopt" an operating agreement; freedom of contract; enforceability).
- Missouri Revisor of Statutes - RSMo 347.015 (definition of "operating agreement"; oral or written).
- Missouri Revisor of Statutes - RSMo 347.079 (management vested in members unless the articles name managers).
- Missouri Revisor of Statutes - RSMo 347.037 (Articles of Organization; required contents).
- Missouri Revisor of Statutes - Chapter 347, Limited Liability Companies (full Missouri LLC Act).
- Missouri Secretary of State - Limited Liability Companies (formation; operating agreement not filed).
- Missouri Secretary of State - Corporations Division Forms (Articles of Organization; fees).
- Missouri Secretary of State - Business Entity Search (verify a filed Missouri LLC).
- Justia - Missouri RSMo § 347.081 (operating agreement; contents; policy statement).
- Justia - Missouri Revised Statutes Chapter 347 (Limited Liability Companies).
- IRS - Limited Liability Company (LLC) (federal treatment of member interests).
- IRS - Single Member Limited Liability Companies (separateness and classification).
LegalGlass provides general information for educational purposes and is not a law firm or a substitute for advice from a licensed attorney or tax professional. This page is general information, not legal or tax advice. Statutes change; verify current requirements in Chapter 347 of the Revised Statutes of Missouri and confirm your specific needs with a licensed attorney before acting.