Montana LLC Operating Agreement (2026)

Fact-checked by the LegalGlass editorial team against primary sources · Published Aug 6, 2026 · Last updated Aug 6, 2026

A Montana LLC operating agreement is not filed with the state and is not legally required, but it is strongly recommended. It is an internal contract that sets ownership, management (member- or manager-managed), voting, and distributions - and it overrides the default rules in the Montana Limited Liability Company Act.

Is a Montana Operating Agreement Required?

No Montana statute forces an LLC to adopt an operating agreement, and you do not file one with the Montana Secretary of State. When you create a Montana LLC, the only document that goes to the state is the Articles of Organization; the operating agreement stays in your own records. In that narrow legal sense, an operating agreement is optional.

In every practical sense, though, it is close to essential. An operating agreement is the governing contract among the members - the rulebook for how the business makes decisions, splits money, admits or removes owners, and eventually winds down. Without one, your LLC is governed entirely by the default rules of the Montana Limited Liability Company Act, which may not match what you and your co-owners actually intend. A signed agreement also strengthens the limited-liability separation between you and the business, and banks, lenders, and investors routinely ask to see one. That is why "not required" should not be read as "not needed." See our national operating agreement guide for the general framework.

What a Montana Operating Agreement Should Include

A solid Montana operating agreement covers the questions that cause disputes if left unanswered. At a minimum, it should address:

• Ownership and contributions - each member's capital contribution and ownership percentage or membership interest.
• Management structure - whether the LLC is member-managed or manager-managed, and who has authority to bind the company.
• Voting - how votes are counted (per capita or by ownership) and what matters require member approval.
• Profits, losses, and distributions - how money is allocated and when distributions are paid.
• Transfers and buy-sell terms - what happens when a member wants to sell, dies, or withdraws.
• Dissolution - how the LLC can be wound up and its assets distributed.

These provisions are where an operating agreement earns its keep: each one lets the members displace a statutory default with a rule tailored to their business. Keeping ownership percentages and roles consistent with your EIN application and tax elections avoids confusion later.

Member-Managed vs Manager-Managed

One of the most important choices your operating agreement records is the LLC's management structure. In a member-managed LLC, the owners themselves run day-to-day operations and each member generally has authority to act for the company. This is the common choice for small, owner-operated Montana businesses where everyone is hands-on.

In a manager-managed LLC, the members appoint one or more managers (who may or may not be members) to run the business, while the other members take a passive, investor-style role. This structure suits LLCs with silent investors, multiple locations, or owners who do not want to be involved in daily decisions. The Montana LLC Act recognizes both structures, and it uses your designation to determine who has the authority to bind the LLC. Because the two models distribute power very differently, the operating agreement should state the choice clearly and spell out each manager's or managing member's authority and limits.

Single-Member vs Multi-Member Agreements

Operating agreements are valuable for both single-member and multi-member LLCs, but they do different work. In a multi-member LLC, the agreement is fundamentally about the relationship among owners: it prevents disputes by fixing voting rights, capital calls, profit splits, and exit terms in advance. When co-owners disagree later, the agreement - not a guess about the statute - decides the outcome.

In a single-member LLC, there is no co-owner to negotiate with, so people often skip the document. That is a mistake. A single-member operating agreement reinforces that the LLC is a separate legal entity from its owner, which supports the liability shield and helps rebut any claim that the LLC is merely the owner's alter ego. It also provides a clear succession plan - who takes over the membership interest if the owner dies or becomes incapacitated - and it satisfies banks and lenders that frequently request one before opening accounts or extending credit. Whether you go solo or with partners, compare tax treatment in our S-corp vs LLC explainer.

Statutory Default Rules Under the Montana LLC Act

The reason an operating agreement matters so much is that, in its absence, the Montana Limited Liability Company Act (found in the Montana Code Annotated, Title 35, Chapter 8) supplies the missing terms. These default rules function as a fallback contract: they cover how members vote, how profits and losses are shared, how managers are chosen, and how the LLC dissolves when the members have not agreed otherwise.

The catch is that the defaults are one-size-fits-all and may not reflect your intentions. For example, a statutory default might allocate management or distributions in a way that ignores the fact that one owner contributed far more capital, or that another does all the work. An operating agreement lets the members opt out of those defaults and substitute their own rules - within the limits the Act sets, since a few core protections cannot be waived. In short, the Act decides everything you don't; the operating agreement is how you take control of the terms that matter to your business. Because the Act is the backstop, it is worth reading the Chapter 8 sections that apply to your management structure before you finalize your document.

It is also worth understanding the relationship between the two documents that define your LLC. The Articles of Organization are the public, state-filed record that brings the entity into existence and lists basic facts like the LLC's name and registered agent. The operating agreement is the private, internal contract that governs how the owners actually run and share the business. The Articles say the LLC exists; the operating agreement says how it works. Where the operating agreement is silent, the Montana LLC Act fills the gap - so the more completely your agreement addresses ownership, management, and exits, the less you leave to a default rule that may not fit your situation.

How to Draft a Montana Operating Agreement

You can prepare a Montana operating agreement yourself or with an attorney. The process follows a logical order:

1. Identify members and ownership. List each member, their capital contribution, and their ownership percentage.
2. Choose your management structure. State whether the LLC is member-managed or manager-managed and name the managers or managing members.
3. Set voting, profits, and distributions. Define voting rules and how profits, losses, and distributions are handled - these displace the Act's defaults.
4. Address transfers and dissolution. Add buy-sell terms, succession on death or withdrawal, and how the LLC can be dissolved and wound up.
5. Sign and keep it. Have all members sign, then store the agreement with the LLC's internal records. You do not file it with the Secretary of State.

Revisit the document whenever ownership, management, or major terms change, and amend it following its own amendment procedure. Because it is never filed publicly, updating it is an internal step - but keeping the current signed version on hand is what makes it useful if a dispute or a lender's request arises. For related filings, see DBA registration and business licenses.

Frequently Asked Questions

Is an operating agreement required for a Montana LLC?

No. Montana does not legally require an LLC to have an operating agreement, and you do not file one with the state. However, it is strongly recommended, because a written agreement controls how the LLC is run and overrides the default rules in the Montana LLC Act.

Do I file my Montana operating agreement with the state?

No. The operating agreement is an internal document. You do not file it with the Montana Secretary of State, and it is not part of the public record. You keep it with your LLC's records and provide it to banks or partners when needed.

Does a single-member Montana LLC need an operating agreement?

It is not legally required, but a single-member LLC still benefits from one. A written agreement helps show the LLC is a separate entity, supports the liability shield, and makes ownership and succession clear to banks, lenders, and successors.

What happens if a Montana LLC has no operating agreement?

The default rules of the Montana Limited Liability Company Act govern the LLC. Those defaults cover voting, profit sharing, and management, but they may not match what the members want, which is why a custom operating agreement is recommended.

Member-managed or manager-managed - which should I pick?

Member-managed means the owners run day-to-day operations, which suits most small LLCs. Manager-managed means designated managers run the business while other members are passive. Your operating agreement states the choice and defines each role's authority.

Can I change my Montana operating agreement later?

Yes. Members can amend the operating agreement following the amendment procedure it sets out, or by unanimous consent if it is silent. Because it is not filed with the state, you update the internal document and keep the signed version with your records.

Related

• How to form an LLC (cluster hub)
• LLC operating agreements (national)
• S-corp vs LLC
• How to get an EIN
• Registered agents
• How to form an LLC in Montana (sibling)
• Business tax overview

More: trademarks, ITINs, dissolving an LLC, and the glossary.

Sources

1. Montana Secretary of State - Business Services (LLC formation; filings not including the operating agreement).
2. Montana Secretary of State - Business Forms (Articles of Organization; no operating-agreement filing).
3. Montana Secretary of State - Business Search (public record of LLC filings).
4. Montana Legislature - Montana Code Annotated, Title 35, Chapter 8 (Limited Liability Companies), parts index.
5. Montana Legislature - MCA Title 35, Chapter 8, Part 1 - general provisions and definitions.
6. Montana Legislature - MCA Title 35, Corporations, Partnerships, and Associations (chapters index).
7. Justia - Montana Code, Title 35, Chapter 8, Limited Liability Companies.
8. Justia - Montana Code, Title 35, Chapter 8, Part 1 (operating agreement and default rules).
9. Montana Department of Revenue - Taxes (how LLC income is taxed in Montana).
10. Montana Department of Revenue - Pass-Through Entities (partnership and S-corporation reporting).
11. IRS - Limited Liability Company (LLC) (default federal classification).
12. IRS - Single Member Limited Liability Companies.
13. IRS - About Form 2553, Election by a Small Business Corporation (S-corp election).
14. IRS - About Form 1065, U.S. Return of Partnership Income (multi-member LLCs).
15. IRS - Get an Employer Identification Number (free EIN).

LegalGlass provides general information for educational purposes and is not a law firm or a substitute for advice from a licensed attorney. An operating agreement is a legal contract; consider having a Montana attorney review yours, and verify current requirements with the Montana Secretary of State before acting.