Is an operating agreement required for Montana LLCs?

No, Montana does not legally require LLCs to have operating agreements. However, you should create one anyway because Montana's default LLC statutes (found in Mont. Code Ann. § 35-8-101 et seq.) impose standardized rules that likely won't match your specific business structure or ownership intentions. Without a written operating agreement, Montana law automatically dictates how profits are distributed (equally among members), how decisions are made (unanimous consent for major changes), and how the LLC dissolves. If you have multiple members or plan to bring in investors, these defaults can create costly disputes or lock you into unfavorable arrangements. The practical consequence is that you lose control over your LLC's governance. A custom operating agreement lets you specify profit splits, voting power, management roles, and buy-sell provisions tailored to your partnership. Your next step: Draft or download a Montana LLC operating agreement template, customize it for your ownership structure, have all members sign and date it, and keep the executed copy with your business records—even though it's not filed with the Montana Secretary of State.

Can I write my own Montana LLC operating agreement?

Yes, you can write your own Montana LLC operating agreement—Montana does not require a specific form or attorney involvement for creation. You can use templates, legal software, or draft from scratch, as long as your agreement complies with Montana's LLC Act (Title 35, Chapter 8, MCA). However, this flexibility comes with real consequences: a poorly drafted agreement may fail to address member dispute resolution, profit distribution, or voting rights in ways Montana's default statutes would otherwise impose on you. If your LLC has multiple members, significant assets exceeding $50,000, or anticipated operational conflicts, an attorney review costs $300–800 but can prevent costly litigation later. For straightforward single-member LLCs with standard operations, templates work fine. Your next step: download a Montana-specific template from the Secretary of State website, customize it for your member structure and capital contributions, then have each member sign and retain copies before beginning operations.

Does my Montana operating agreement need to be notarized?

No, Montana does not require operating agreements to be notarized. Under Montana law, your operating agreement becomes legally binding the moment all members sign it—notarization is completely optional. However, getting your agreement notarized through a Montana notary public provides significant practical protection: it creates an official record of the signing date and member identities, which proves invaluable if disputes arise later or if you need to demonstrate agreement authenticity to banks, lenders, or courts. Notarization typically costs $5–15 per signature in Montana and takes just minutes. Since your operating agreement governs critical decisions like profit distribution, voting rights, and member withdrawal procedures, the minimal expense of notarization is worthwhile insurance against future challenges to its validity. To proceed, have all LLC members sign the agreement, then visit any Montana notary public (available at banks, title companies, or the Secretary of State's office in Helena) to have the signatures notarized before filing your Articles of Organization with the Montana Secretary of State.

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

Without an operating agreement, your Montana LLC will be governed by Montana's default LLC laws under the Revised Uniform Limited Liability Company Act (MRLLCA), which means the state essentially writes the rules for you. Under Montana Code Annotated § 35-8-101 et seq., default provisions dictate equal profit distribution among members regardless of capital contributions, restrict member transfer rights, and require unanimous consent for major decisions—even if your actual arrangement differs significantly. This creates substantial practical risk: if disputes arise between members, courts will apply these rigid statutory defaults rather than your intended operating terms, potentially forcing unwanted buyouts, profit splits, or management structures. Additionally, without a documented operating agreement, the Montana Secretary of State and the IRS may question whether your LLC actually exists as a separate legal entity, jeopardizing liability protection if challenged. The practical implication is that you lose control over fundamental business decisions and expose yourself to unexpected legal and tax consequences. Your next step is to draft and execute an operating agreement using Montana's statutory framework, then retain a signed copy in your business records before any disputes occur.

Can I amend my Montana LLC operating agreement after it's created?

Yes, you can amend your Montana LLC operating agreement after formation, but the process depends on your agreement's existing provisions. If your operating agreement specifies amendment procedures—such as requiring a majority or unanimous member vote—you must follow those exact steps. If no amendment process is outlined, Montana law requires unanimous consent from all members to modify the agreement. Any amendments must be documented in writing and signed by all consenting members; verbal modifications aren't legally enforceable in Montana. Practically, this means you'll need to gather signatures from every member, which becomes increasingly difficult as your LLC grows. The Montana Secretary of State doesn't require you to file amendments, but keeping a signed, dated copy with your LLC records protects you in disputes. Your next step is to review your current operating agreement's amendment clause, then draft a written amendment statement identifying the specific sections being changed and the effective date.

LLC Guide

Montana LLC Operating Agreement: Free Template & Complete Guide

Protect your business with a comprehensive operating agreement. Get our free template and learn Montana's requirements for 2026.

By Edmond Hui · Last updated: June 2026

Montana does not legally require an LLC operating agreement, but having one protects your limited liability status and sets the rules for ownership and profits. See exactly what to include below.

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.

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Montana LLC Operating Agreement — key sections

State Requirements

Required By Law	no
Must Be Filed	no
Special Rules	Montana follows the Revised Uniform Limited Liability Company Act, which provides default rules when no operating agreement exists. While not required, an operating agreement is strongly recommended to override these default provisions and establish custom management and operational procedures.

What to Include in Your Operating Agreement

Ownership & membership

Define each member's ownership percentage and capital contributions. This section establishes who owns what portion of the LLC and prevents disputes over equity distribution.

Management structure

Specify whether your LLC is member-managed or manager-managed. This determines who has authority to make decisions and bind the company in contracts and daily operations.

Voting rights

Outline how decisions are made, including voting thresholds for major decisions. Establish procedures for member meetings and what constitutes a quorum for valid votes.

Profit/loss allocation

Detail how profits and losses are distributed among members and when distributions occur. This section is crucial for tax purposes and member expectations about returns.

Member duties

Define each member's roles, responsibilities, and any restrictions on their activities. Include provisions about confidentiality, non-compete agreements, and fiduciary duties.

Dissolution process

Establish procedures for dissolving the LLC, including triggering events and asset distribution. This protects all members by providing a clear exit strategy and preventing costly disputes.

Amendment procedures

Specify how the operating agreement can be modified in the future. Include voting requirements and documentation procedures to ensure changes are properly authorized and recorded.

Frequently Asked Questions

: No, Montana does not legally require LLCs to have operating agreements. However, you should create one anyway because Montana's default LLC statutes (found in Mont. Code Ann. § 35-8-101 et seq.) impose standardized rules that likely won't match your specific business structure or ownership intentions. Without a written operating agreement, Montana law automatically dictates how profits are distributed (equally among members), how decisions are made (unanimous consent for major changes), and how the LLC dissolves. If you have multiple members or plan to bring in investors, these defaults can create costly disputes or lock you into unfavorable arrangements. The practical consequence is that you lose control over your LLC's governance. A custom operating agreement lets you specify profit splits, voting power, management roles, and buy-sell provisions tailored to your partnership. Your next step: Draft or download a Montana LLC operating agreement template, customize it for your ownership structure, have all members sign and date it, and keep the executed copy with your business records—even though it's not filed with the Montana Secretary of State.
: Yes, you can write your own Montana LLC operating agreement—Montana does not require a specific form or attorney involvement for creation. You can use templates, legal software, or draft from scratch, as long as your agreement complies with Montana's LLC Act (Title 35, Chapter 8, MCA). However, this flexibility comes with real consequences: a poorly drafted agreement may fail to address member dispute resolution, profit distribution, or voting rights in ways Montana's default statutes would otherwise impose on you. If your LLC has multiple members, significant assets exceeding $50,000, or anticipated operational conflicts, an attorney review costs $300–800 but can prevent costly litigation later. For straightforward single-member LLCs with standard operations, templates work fine. Your next step: download a Montana-specific template from the Secretary of State website, customize it for your member structure and capital contributions, then have each member sign and retain copies before beginning operations.
: No, Montana does not require operating agreements to be notarized. Under Montana law, your operating agreement becomes legally binding the moment all members sign it—notarization is completely optional. However, getting your agreement notarized through a Montana notary public provides significant practical protection: it creates an official record of the signing date and member identities, which proves invaluable if disputes arise later or if you need to demonstrate agreement authenticity to banks, lenders, or courts. Notarization typically costs $5–15 per signature in Montana and takes just minutes. Since your operating agreement governs critical decisions like profit distribution, voting rights, and member withdrawal procedures, the minimal expense of notarization is worthwhile insurance against future challenges to its validity. To proceed, have all LLC members sign the agreement, then visit any Montana notary public (available at banks, title companies, or the Secretary of State's office in Helena) to have the signatures notarized before filing your Articles of Organization with the Montana Secretary of State.
: Without an operating agreement, your Montana LLC will be governed by Montana's default LLC laws under the Revised Uniform Limited Liability Company Act (MRLLCA), which means the state essentially writes the rules for you. Under Montana Code Annotated § 35-8-101 et seq., default provisions dictate equal profit distribution among members regardless of capital contributions, restrict member transfer rights, and require unanimous consent for major decisions—even if your actual arrangement differs significantly. This creates substantial practical risk: if disputes arise between members, courts will apply these rigid statutory defaults rather than your intended operating terms, potentially forcing unwanted buyouts, profit splits, or management structures. Additionally, without a documented operating agreement, the Montana Secretary of State and the IRS may question whether your LLC actually exists as a separate legal entity, jeopardizing liability protection if challenged. The practical implication is that you lose control over fundamental business decisions and expose yourself to unexpected legal and tax consequences. Your next step is to draft and execute an operating agreement using Montana's statutory framework, then retain a signed copy in your business records before any disputes occur.
: Yes, you can amend your Montana LLC operating agreement after formation, but the process depends on your agreement's existing provisions. If your operating agreement specifies amendment procedures—such as requiring a majority or unanimous member vote—you must follow those exact steps. If no amendment process is outlined, Montana law requires unanimous consent from all members to modify the agreement. Any amendments must be documented in writing and signed by all consenting members; verbal modifications aren't legally enforceable in Montana. Practically, this means you'll need to gather signatures from every member, which becomes increasingly difficult as your LLC grows. The Montana Secretary of State doesn't require you to file amendments, but keeping a signed, dated copy with your LLC records protects you in disputes. Your next step is to review your current operating agreement's amendment clause, then draft a written amendment statement identifying the specific sections being changed and the effective date.

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