Is an operating agreement required for Missouri LLCs?

Yes. Missouri law requires the member or members of a Missouri LLC to adopt an operating agreement. It may be written or oral, or a written declaration by a sole member, and a written one is the version a bank or court can see. Without a written operating agreement, your LLC will be governed by default provisions in Missouri state law, which may not align with your business intentions. Additionally, banks and lenders often request operating agreements before approving business loans or credit lines. Creating an operating agreement, whether using a free template or hiring an attorney, is inexpensive protection that clarifies member roles, profit distribution, and decision-making authority. This document becomes critical if you've multiple members or anticipate bringing in investors. Your next step: Draft an operating agreement immediately after filing your Articles of Organization with the Missouri Secretary of State, since Missouri law requires one. This positions your LLC to withstand legal challenges and satisfy third-party requirements.

Can I write my own Missouri LLC operating agreement?

Yes, you can draft your own Missouri LLC operating agreement without legal assistance. Missouri doesn't require you to file an operating agreement with the Missouri Secretary of State. This means you've complete flexibility to create a customized agreement using free templates or online document services. However, this approach carries real risks. Where the agreement is silent, the default rules in Missouri's LLC law can apply. For single-member LLCs with straightforward operations, a template may suffice. For multi-member LLCs, those involving significant capital contributions, or ventures with complex ownership structures, consulting a Missouri business attorney is prudent insurance. Your next step: Draft a preliminary agreement using a reputable template, then have a Missouri business attorney review it before all members sign.

Does a Missouri LLC operating agreement need to be notarized?

No, Missouri doesn't require LLC operating agreements to be notarized. Under Missouri's Limited Liability Company Act, the agreement becomes legally binding once all members sign it. Notarization is entirely optional. However, this creates a practical consideration: while an unnotarized agreement is valid between members, it may face challenges if disputes arise or if third parties question its authenticity in court proceedings. It strengthens enforceability by creating a presumption that signatures are genuine. This becomes especially valuable if your LLC has multiple members, significant assets, or potential creditor disputes. To move forward, draft your operating agreement using Missouri's statutory requirements, have all members sign in front of a Missouri-licensed notary public (optional but recommended), and keep the signed agreement with your LLC records (it is not filed with the Secretary of State).

What happens if my Missouri LLC doesn't have an operating agreement?

Without an operating agreement, members have no written terms to settle a disagreement. Where the members have no agreement on a point, the default rules in Missouri's LLC law can apply instead. Read the guidance for LLCs on the website of the state agency that registers them in Missouri before you draft the agreement.

Can a Missouri LLC operating agreement be amended after formation?

Yes. An operating agreement can be changed by following the amendment procedure it sets out, such as a vote or the written consent of the members it names. If the agreement says nothing about amendments, the default rules in Missouri's LLC law can apply, so check them, or ask a Missouri business attorney, before you change a term. Put each amendment in writing, have the members sign it, and keep it with the agreement. To amend the LLC's Articles of Organization on file with the state, Missouri uses a separate filing, the Amendment of Articles of Organization.

Missouri LLC Operating Agreement: What to Include

What to put in an operating agreement for your Missouri LLC, and how single-member and multi-member agreements differ.

By Edmond Hui · Last updated: October 2026

Missouri law requires an LLC to have an operating agreement. Here is what to include. See exactly what to include below.

Affiliate disclosure: We may earn a commission at no extra cost to you.

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Key sections of a Missouri LLC operating agreement, listing the 7 provisions the document should cover. — What a Missouri operating agreement should contain, section by section. Source: Missouri Secretary of State.

Watch: Missouri LLC Operating Agreement: What to Include (2026)

State Requirements

Required By Law	Yes. The agreement may be written or oral.
Must Be Filed	no
Special Rules	Missouri law requires the member or members of an LLC to adopt an operating agreement. It may be written or oral, or a written declaration by a sole member, and it is not filed with the Secretary of State.

What to Include in Your Operating Agreement

Ownership & membership

Define each member's ownership percentage, capital contributions, and membership interests. This section establishes who owns what portion of your Missouri LLC and prevents future ownership disputes.

Management structure

Specify whether your LLC is member-managed or manager-managed and outline decision-making authority. This clarifies who has the power to make binding decisions and manage daily operations.

Voting rights

Establish how votes are weighted and what decisions require member approval. Define voting procedures for major decisions like admitting new members or changing business direction.

Profit/loss allocation

Detail how profits and losses are distributed among members and when distributions occur. This section should align with your tax strategy and member expectations for returns on investment.

Member duties

Outline each member's responsibilities, time commitments, and restrictions on competing businesses. Clear duties prevent conflicts and ensure all members understand their obligations to the LLC.

Dissolution process

Establish procedures for dissolving the LLC and distributing assets. Include triggering events for dissolution and step-by-step processes to protect all members' interests during wind-up.

Amendment procedures

Define how the operating agreement can be modified and what approval is required for changes. This ensures your agreement can evolve with your business while maintaining proper member consent.

Read this guide for another state:

Frequently Asked Questions

: Yes. Missouri law requires the member or members of a Missouri LLC to adopt an operating agreement. It may be written or oral, or a written declaration by a sole member, and a written one is the version a bank or court can see. Without a written operating agreement, your LLC will be governed by default provisions in Missouri state law, which may not align with your business intentions. Additionally, banks and lenders often request operating agreements before approving business loans or credit lines. Creating an operating agreement, whether using a free template or hiring an attorney, is inexpensive protection that clarifies member roles, profit distribution, and decision-making authority. This document becomes critical if you've multiple members or anticipate bringing in investors. Your next step: Draft an operating agreement immediately after filing your Articles of Organization with the Missouri Secretary of State, since Missouri law requires one. This positions your LLC to withstand legal challenges and satisfy third-party requirements.
: Yes, you can draft your own Missouri LLC operating agreement without legal assistance. Missouri doesn't require you to file an operating agreement with the Missouri Secretary of State. This means you've complete flexibility to create a customized agreement using free templates or online document services. However, this approach carries real risks. Where the agreement is silent, the default rules in Missouri's LLC law can apply. For single-member LLCs with straightforward operations, a template may suffice. For multi-member LLCs, those involving significant capital contributions, or ventures with complex ownership structures, consulting a Missouri business attorney is prudent insurance. Your next step: Draft a preliminary agreement using a reputable template, then have a Missouri business attorney review it before all members sign.
: No, Missouri doesn't require LLC operating agreements to be notarized. Under Missouri's Limited Liability Company Act, the agreement becomes legally binding once all members sign it. Notarization is entirely optional. However, this creates a practical consideration: while an unnotarized agreement is valid between members, it may face challenges if disputes arise or if third parties question its authenticity in court proceedings. It strengthens enforceability by creating a presumption that signatures are genuine. This becomes especially valuable if your LLC has multiple members, significant assets, or potential creditor disputes. To move forward, draft your operating agreement using Missouri's statutory requirements, have all members sign in front of a Missouri-licensed notary public (optional but recommended), and keep the signed agreement with your LLC records (it is not filed with the Secretary of State).
: Without an operating agreement, members have no written terms to settle a disagreement. Where the members have no agreement on a point, the default rules in Missouri's LLC law can apply instead. Read the guidance for LLCs on the website of the state agency that registers them in Missouri before you draft the agreement.
: Yes. An operating agreement can be changed by following the amendment procedure it sets out, such as a vote or the written consent of the members it names. If the agreement says nothing about amendments, the default rules in Missouri's LLC law can apply, so check them, or ask a Missouri business attorney, before you change a term. Put each amendment in writing, have the members sign it, and keep it with the agreement. To amend the LLC's Articles of Organization on file with the state, Missouri uses a separate filing, the Amendment of Articles of Organization.

Sources

8 documents

Each entry below is a document recorded in our verified Missouri sources, and each entry says what the document is. Some statutory text is read from an accurate mirror rather than from the state's own host, and those say so. Where we hold the citation but no stable public link, the citation is printed on its own rather than pointed at a guessed address.

Missouri Limited Liability Company Act, Mo. Rev. Stat. sections 347.010 to 347.187
Missouri statute: RSMo 347.081.1 (duty to adopt an operating agreement)
Missouri statute: RSMo 347.015(13) (operating agreement defined)
Missouri statute: Mo. Rev. Stat. § 347.010 et seq. (LLC Act)
Missouri statute: RSMo 347.101 (default distributions)
Missouri statute: Missouri Revised Statutes Chapter 347 (LLC law)
Missouri statute: Chapter 347 (LLC law)
sos.mo.gov/business/corporationsMissouri Secretary of State: business entity filings

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Edmond Hui · Founder, MyStateLLC

Edmond Hui is a software engineer and serial entrepreneur based in New York who has founded multiple online businesses across e-commerce, media, and information publishing. Before transitioning into tech, he spent years as a commercial real estate professional closing deals totaling over 100,000 square feet, giving him firsthand experience with business formation and entity structuring. He built MyStateLLC to provide the free, state-specific LLC guidance he wished existed when forming his own companies.

How we check facts

State Requirements

What to Include in Your Operating Agreement

Ownership & membership

Management structure

Voting rights

Profit/loss allocation

Member duties

Dissolution process

Amendment procedures

Frequently Asked Questions

Sources

More for Missouri LLCs

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Taxes, money and growth

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Operate in other states

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