Michigan Operating Agreement: Rules & Requirements (2026)

Q: Does Michigan file my operating agreement?

No. The operating agreement is an internal document kept with your company records. You file only the Articles of Organization (Form CSCL/CD-700, $50) with the Corporations, Securities & Commercial Licensing Bureau at LARA. The operating agreement is never submitted to the state.

Q: Does a single-member Michigan LLC need an operating agreement?

It is not legally required, but it is still valuable. A single-member operating agreement documents that the LLC is separate from its owner, reinforces limited liability, and lets you set your own rules instead of relying on the Michigan LLC Act's default provisions.

Q: How does Michigan split LLC profits without an operating agreement?

Under the default rule in MCL 450.4503, if the operating agreement is silent, distributions are shared among members on the basis of the value of their contributions to the LLC, not equally per member. An operating agreement can change this to any allocation the members choose.

Q: Can a Michigan operating agreement be oral?

For it to be an operating agreement under the Michigan LLC Act, MCL 450.4102 defines it as a written agreement of the members. An oral understanding may still bind members generally, but a signed written agreement is what controls governance and is what banks, courts, and partners expect.

Q: Do I need to update my operating agreement when membership changes?

Yes. Amend the operating agreement whenever a member joins or leaves, ownership percentages change, or management shifts between member-managed and manager-managed. The amendment stays in your internal records; you do not file it with LARA.

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

Michigan does not require an LLC to have an operating agreement, and the state never files one. You file only the Articles of Organization (Form CSCL/CD-700, $50) with LARA to create the LLC. If you do adopt an operating agreement, the Michigan LLC Act treats it as a written agreement that overrides the statute's default rules on management, voting, and how profits are shared.

Quick Answer

Required?: No - not required by the Michigan LLC Act, but strongly recommended
Filed with state?: No - it is an internal document; you never send it to LARA
Governing law: Michigan Limited Liability Company Act, 1993 PA 23 (MCL 450.4101 et seq.)
Definition: A written agreement of the members (MCL 450.4102)
Default distributions: By value of contributions, not per capita (MCL 450.4503)
What you do file: Articles of Organization, Form CSCL/CD-700, $50, with LARA/CSCL

Is an Operating Agreement Required for a Michigan LLC?

No. The Michigan Limited Liability Company Act (1993 PA 23, codified at MCL 450.4101 and following) does not require a limited liability company to adopt an operating agreement, and no Michigan agency will ask to see one when you form or maintain your LLC. A Michigan LLC legally exists the moment the Corporations, Securities & Commercial Licensing Bureau (CSCL) at the Department of Licensing and Regulatory Affairs (LARA) accepts your Articles of Organization. That said, operating without a written agreement is a mistake for almost every LLC: it leaves your company governed entirely by the statute's default rules, some of which surprise owners.

An operating agreement is the private contract among the members (and, in a single-member LLC, the owner's declaration) that sets ownership percentages, management, voting, capital contributions, distributions, and what happens when a member leaves. Because it is optional and internal, you have wide freedom to tailor it - but the parts you leave out are filled by the Michigan LLC Act. For the national picture, see our overview of LLC operating agreements and how to form an LLC.

Michigan Does Not File Your Operating Agreement

The operating agreement is never submitted to the state. The only creation document Michigan files is the Articles of Organization (Form CSCL/CD-700), which costs $50 and is filed with CSCL either online or by mail. The Articles are a short public record listing the LLC's name, its purpose, its duration, and its resident agent and registered office. The operating agreement, by contrast, stays in your company minute book. This separation matters: sensitive terms such as buy-sell provisions, capital accounts, and profit splits remain private because they never enter the public filing. If you are still choosing a state or comparing costs, see Michigan LLC cost and the Michigan Articles of Organization guide.

Because the agreement is internal, you do not pay a state fee to adopt or amend it, and there is no filing deadline attached to it. The document simply needs to be signed by the members and kept with your records, where banks, lenders, investors, and courts can rely on it.

The Michigan LLC Act Default Rules Your Agreement Overrides

When an operating agreement is silent, the Michigan LLC Act supplies the answer. Understanding these defaults shows why a tailored agreement matters:

Management (MCL 450.4401). A Michigan LLC is member-managed by default - every member shares in management - unless the Articles of Organization state that the company is managed by managers.
Distributions (MCL 450.4503). If the agreement does not say otherwise, distributions are shared among the members on the basis of the value of their contributions, not equally per member. Two members who each own "half" but contributed different amounts of capital may not split cash 50/50 under the default.
Voting. Ordinary decisions default to approval by a majority in interest of the members, while certain fundamental actions require unanimous or higher approval unless the agreement changes the threshold.
Operating agreement scope (MCL 450.4308). The Act expressly lets members regulate their affairs and the LLC's business through the operating agreement, subject to the Act and the Articles, which is the statutory hook that makes a customized agreement enforceable.

A well-drafted operating agreement replaces each of these defaults with the rules the owners actually want, which is the entire point of writing one.

What to Include in a Michigan Operating Agreement

There is no state-mandated template, but a complete Michigan operating agreement generally covers:

Company basics: the LLC's legal name, principal office, resident agent, and effective date, matching the Articles of Organization on file with CSCL.
Members and ownership: each member's name and percentage or membership units, plus initial capital contributions.
Management structure: whether the LLC is member-managed or manager-managed, and the authority of each manager or member.
Voting: what percentage approves ordinary decisions versus major decisions such as admitting members, borrowing, or dissolving.
Capital and distributions: how and when profits and losses are allocated and distributed, overriding the value-of-contributions default.
Transfers and exit: restrictions on transferring interests, buy-sell terms, and what happens on death, withdrawal, or dissociation of a member.
Dissolution: the events that wind up the company and how assets are distributed, which connects to dissolving a Michigan LLC.

Member-Managed vs. Manager-Managed in Michigan

Michigan LLCs are member-managed by default (MCL 450.4401). In a member-managed LLC, every member can bind the company and participate in day-to-day decisions - a natural fit for small, owner-operated businesses. In a manager-managed LLC, the members appoint one or more managers (who may or may not be members) to run the business, while non-managing members act more like passive investors. This choice belongs in both the Articles of Organization and the operating agreement, and the two should agree. Because managers have authority the default rules would otherwise spread across all members, spelling out their powers and limits in the operating agreement prevents disputes. See the glossary for definitions of member-managed and manager-managed.

Single-Member vs. Multi-Member Agreements

A single-member Michigan LLC still benefits from an operating agreement. Even though there is no one to negotiate with, the document records that the LLC is a separate legal person, which helps preserve the liability shield if the LLC is ever challenged as an alter ego of its owner. It also lets a single owner name a successor and set management terms in advance. A multi-member Michigan LLC needs an agreement even more urgently: without one, the value-of-contributions distribution default and the member-managed default control, and disagreements over money and authority have no agreed tiebreaker. Multi-member agreements should always address capital calls, deadlock, and member exit.

Operating Agreement, the EIN, and Taxes

The operating agreement does not change how the IRS taxes your LLC, but the two work together. By default, the IRS treats a single-member Michigan LLC as a disregarded entity and a multi-member LLC as a partnership; either can elect corporate or S-corporation treatment. Your operating agreement's ownership percentages and distribution rules should be consistent with the tax classification you choose and with the allocations reported on partnership returns. Most Michigan LLCs also need a federal EIN, which is free from the IRS and is required if the LLC has more than one member or any employees. Banks routinely ask to see the operating agreement together with the EIN and the stamped Articles when you open a business account. For ongoing obligations, see Michigan resident agent requirements and business tax basics.

Amending and Maintaining Your Agreement

An operating agreement is a living document. Amend it whenever ownership percentages change, a member joins or leaves, the company switches between member-managed and manager-managed, or the distribution formula changes. Amendments are adopted according to the voting rules in the agreement itself and are kept in your internal records - you do not file them with LARA. Keep the agreement consistent with your public filings: your resident agent and company name in the operating agreement should match the Articles of Organization, and you must still file the Michigan annual statement (Form CSCL/CD-2700, $25, due February 15) to keep the LLC in good standing. See Michigan annual report/statement for that separate requirement, and confirm details on the Michigan formation document page.

Frequently Asked Questions

Is an operating agreement required for a Michigan LLC?

No. The Michigan Limited Liability Company Act does not require one. It is strongly recommended, and if adopted it must be a written agreement to qualify as an operating agreement under MCL 450.4102.

Does Michigan file my operating agreement?

No. It stays in your company records. You file only the Articles of Organization (Form CSCL/CD-700, $50) with CSCL at LARA. The operating agreement is never submitted to the state.

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

It is not legally required, but it documents that the LLC is separate from its owner, reinforces limited liability, and lets you set your own rules instead of relying on the Michigan LLC Act defaults.

How does Michigan split LLC profits without an operating agreement?

Under MCL 450.4503, if the agreement is silent, distributions are shared on the basis of the value of each member's contributions - not equally per member. An operating agreement can change this to any split the members choose.

Can a Michigan operating agreement be oral?

MCL 450.4102 defines an operating agreement as a written agreement of the members. A signed written document is what controls governance and what banks and courts expect.

Do I need to update my operating agreement when membership changes?

Yes. Amend it whenever a member joins or leaves, ownership shifts, or management changes. The amendment stays in your internal records; you do not file it with LARA.

Sources

Michigan LLC Act - MCL 450.4102, Definitions (operating agreement defined as a written agreement of the members).
Michigan LLC Act - MCL 450.4308, Operating agreement; scope.
Michigan LLC Act - MCL 450.4401, Management by members or managers (member-managed default).
Michigan LLC Act - MCL 450.4503, Sharing of distributions (default by value of contributions).
Michigan LLC Act - MCL 450.4101, Short title (1993 PA 23).
Michigan LLC Act - MCL 450.4207, Resident agent and registered office.
Michigan LARA - Limited Liability Company (CSCL) (Articles of Organization, Form CSCL/CD-700, $50).
Michigan LARA - Corporations, Securities & Commercial Licensing Bureau.
Michigan LARA - Corporations Division (business entity filings).
Michigan LARA - LLC Annual Statements (Form CSCL/CD-2700, $25, due Feb 15).
Cornell Legal Information Institute - Operating agreement (Wex).
IRS - Limited Liability Company (LLC) (default federal tax classification).
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 or tax professional. Laws, fees, and thresholds change; verify current requirements with Michigan LARA and the Michigan Department of Treasury before acting.