Michigan LLC Operating Agreement — What It Covers and Why You Need One

An operating agreement is a written contract among the members of an LLC that spells out how the company is owned and run. It's the LLC equivalent of a corporation's bylaws and shareholder agreement rolled into one document. It covers ownership percentages, how money moves, who has authority to make decisions, and how the company handles changes and disputes.

Michigan doesn't require you to file the operating agreement with LARA, and it never goes into any public record. It's a private document that lives in your business records. But "not required to file" is not the same as "optional." Without an operating agreement, your LLC still has governing rules — they're just the default rules written into the Michigan Limited Liability Company Act, which may not reflect what you and your co-owners actually intend.

Why it exists

The operating agreement does three main jobs:

• It records the deal. It memorializes what the members agreed to — ownership splits, contributions, profit shares — so there's no argument later about who agreed to what.
• It overrides unfavorable defaults. It lets you replace the Michigan LLC Act's one-size-fits-all default rules with terms tailored to your situation.
• It reinforces the liability shield. Especially for single-member LLCs, a proper operating agreement helps demonstrate that the LLC is a genuine separate entity, which matters if anyone tries to hold you personally liable.

Michigan makes the operating agreement optional in the sense that you can form and operate an LLC without filing one. But going without it is a mistake for almost every LLC, single-member or multi-member.

For multi-member LLCs

When two or more people own a business together, an operating agreement is essential. It's the document that prevents — and resolves — disputes. Without it:

• Profit splits, management authority, and voting rights default to the Michigan LLC Act's provisions, which may not match your handshake deal
• There's no agreed process for what happens when a member wants out, dies, or wants to sell their stake
• Deadlocks between members have no built-in resolution mechanism
• A verbal understanding that seemed clear at the start becomes a "he said, she said" the moment money or exit is on the line

Most co-owner disputes that end up in court could have been avoided by an operating agreement that addressed the issue up front.

For single-member LLCs

A single-member LLC obviously has no partners to negotiate with, so people often skip the agreement. That's a mistake for two reasons. First, banks frequently ask for an operating agreement when you open a business account. Second, and more importantly, the agreement reinforces that your LLC is a real, separate entity — not just you under a different name. If a creditor ever tries to pierce the liability shield and reach your personal assets, a well-maintained operating agreement is evidence that you've respected the separation the law requires.

A complete operating agreement covers the full life cycle of the company — formation, operation, changes, and eventual dissolution. Here's what a thorough one addresses.

Ownership and membership

• Members: Who the owners are and their contact information
• Ownership percentages: Each member's percentage interest in the LLC, often called membership interests or units
• Capital contributions: What each member contributed at the start — cash, property, or services — and its agreed value

Money

• Additional capital: Whether and how members can or must contribute more capital later
• Profit and loss allocation: How profits and losses are divided among members — commonly by ownership percentage, but you can structure it differently
• Distributions: When and how cash is distributed to members, and in what priority

Management and decisions

• Management structure: Whether the LLC is member-managed (owners run it directly) or manager-managed (designated managers run it, and some members may be passive)
• Authority: What each manager or member can do on the company's behalf, and what requires broader approval
• Voting: How votes are counted — by ownership percentage, per member, or another method — and what supermajority or unanimous decisions require

Changes and exits

• Transfer restrictions: What happens when a member wants to sell or transfer their interest, including rights of first refusal and approval requirements
• Adding members: How new members are admitted
• Withdrawal, death, or incapacity: What happens to a member's interest when they leave, die, or can no longer serve — a buyout formula is common here
• Dissolution: The conditions under which the company winds up and how remaining assets are distributed after debts

One of the most important decisions your operating agreement records is how the LLC is managed. Michigan LLCs can be member-managed or manager-managed, and the choice affects who has day-to-day authority.

Member-managed

In a member-managed LLC, the owners run the business directly. Every member generally has authority to act on the company's behalf and participate in decisions. This is the most common structure for small LLCs where all the owners are actively involved in the business.

Manager-managed

In a manager-managed LLC, the members appoint one or more managers to run the company, and those managers hold day-to-day authority. Members who aren't managers become more like passive investors — they have ownership and a vote on major matters, but they don't run operations. This structure suits LLCs with investors who contribute capital but not labor, or larger companies where centralized management makes sense.

Documenting the choice

Your operating agreement should clearly state which structure applies and define the powers that go with it. If you noted a management structure on your Articles of Organization, make sure the operating agreement matches it. The clarity prevents confusion about who can sign contracts, open accounts, and bind the company.

An operating agreement is only useful if it's actually created, signed, and kept current.

Putting it together

You have a few options. A well-structured template tailored to Michigan law works for many straightforward single-member and simple multi-member LLCs. For complex ownership arrangements, unequal profit splits, investor terms, or anything unusual, having a Michigan business attorney draft or review the agreement is money well spent — it's far cheaper than litigating a dispute later.

Signing it

All members should sign the operating agreement. For a multi-member LLC, every owner signs to show they agree to the terms. For a single-member LLC, you sign as the sole member. Keep the signed original with your business records alongside your Articles of Organization, EIN confirmation, and other formation documents.

Keeping it current

The operating agreement isn't a one-time document. Update it whenever the ownership or management of the company changes — a member joins or leaves, ownership percentages shift, or you switch between member-managed and manager-managed. An outdated operating agreement that no longer reflects reality is nearly as problematic as not having one, because it can contradict what's actually happening in the business.

It stays private

Remember that Michigan never requires you to file the operating agreement. It doesn't go to LARA, it isn't public, and no one outside the company sees it unless you share it — with a bank, a lender, a new partner, or in a dispute. That privacy is a feature: your ownership and financial arrangements stay confidential while your Articles of Organization handle the minimal public record.