Breach of Fiduciary Duty Among Business Partners: What It Means and How It Plays Out

This article is for general informational purposes only and is not legal advice, does not create an attorney-client relationship, and should not be relied on as a substitute for advice from qualified counsel about your specific situation. If you have questions about how these issues apply to your business, you should consult with a licensed attorney in your jurisdiction.

Business partners and co-owners owe each other legal duties that go beyond whatever the operating agreement says. These fiduciary duties are among the most important, and least understood, obligations in a closely held business. When a partner diverts an opportunity, takes money that is not theirs, or acts in their own interest at the expense of the business, the conduct may breach those duties and create liability that the partner did not anticipate. On the other side, an owner who believes a partner has crossed the line has legal options that many do not realize exist.

This post explains what fiduciary duties partners owe each other, the conduct that commonly triggers a claim, and the practical and legal options when a partner crosses the line.

What Fiduciary Duties Partners Owe Each Other

A fiduciary duty is a legal obligation to act in the interest of another party rather than purely in your own. In a closely held business, partners, members of an LLC, and shareholders in a close corporation generally owe fiduciary duties to the business and to each other. The exact scope depends on the entity type, the governing agreement, and the role the person holds, but the core duties usually include the following.

The duty of loyalty

The obligation to put the interests of the business ahead of personal interests. This includes not competing with the business, not taking business opportunities for yourself, and not engaging in self-dealing that benefits you at the business's expense.

The duty of care

The obligation to act with the diligence and prudence a reasonable person would use in managing the business. This does not make a partner liable for honest mistakes or ordinary business judgment, but it does require a baseline of attention and good decision-making.

The duty of good faith and fair dealing

The obligation to deal honestly and fairly with co-owners, including providing access to information and not using inside position to disadvantage the others.

One important caveat: in Michigan, LLC operating agreements can modify some fiduciary duties, within limits set by statute. What duties actually apply in a given business depends in part on what the operating agreement says, which is one more reason the agreement matters.

Conduct That Commonly Triggers a Claim

Fiduciary duty claims among partners tend to arise from a recognizable set of behaviors. Some involve outright dishonesty. Others involve a partner who convinces themselves that what they are doing is acceptable.

Self-dealing 

A partner uses their position to enter transactions that benefit themselves at the business's expense: paying an inflated salary or distribution to themselves, having the business buy from or sell to a company they own on favorable terms, or steering business resources toward their own interests.

Diverting business opportunities 

A partner takes for themselves an opportunity that belonged to the business, such as a customer, a contract, or a deal that came to them because of their role in the company. The corporate opportunity doctrine generally requires that opportunities within the business's line of work be offered to the business first.

Misuse of funds or assets

Using company money or property for personal purposes, taking unauthorized draws, or commingling personal and business funds. This is among the most direct forms of breach and often the easiest to prove where the records show it.

Competing with the business

Starting or working for a competing venture while still a partner, or steering customers and employees toward a competitor the partner is quietly building.

Freezing out a co-owner

Withholding information, cutting off access to books and records, excluding a co-owner from management, or withholding distributions in order to pressure them. These tactics can breach fiduciary duties and, in some cases, give rise to a claim for owner oppression.

What a Claim Requires

Establishing a breach of fiduciary duty generally requires showing that a duty existed, that the partner breached it, and that the breach caused harm to the business or the other owners. Each element requires proof, and the second and third are where these cases are usually contested.

Documentation is central. Financial records, communications, corporate records, and the paper trail around the transactions at issue are what turn a suspicion into a provable claim. A partner who suspects self-dealing but cannot access the records to prove it faces a practical problem, which is one reason the right to inspect books and records matters so much in these disputes. In Michigan, owners of LLCs and corporations generally have statutory rights to access certain company records, and a refusal to provide that access is itself often a warning sign.

It is also worth being realistic about the difference between a breach and an ordinary business disagreement. Not every decision a partner dislikes is a fiduciary breach. Honest mistakes, reasonable business judgments that turned out badly, and disagreements about strategy generally do not qualify. A claim needs conduct that actually violated a duty, not just a decision that another owner would have made differently.

Options When a Partner Crosses the Line

An owner who believes a partner has breached their fiduciary duties has a range of options, from informal resolution to litigation. The right one depends on the severity of the conduct, the evidence available, and whether the business relationship can or should be preserved.

Direct resolution 

Where the conduct is less severe or may reflect a misunderstanding, raising it directly, sometimes through counsel, can resolve it without escalation. This is more likely to work early, before positions harden.

Demand for records and an accounting 

A formal demand to inspect books and records, or a request for a formal accounting, can surface the facts needed to understand what happened and establish a claim. An accounting is often a first step in a fiduciary dispute because it produces the financial picture the other owner has been denied.

Buyout or separation 

In many cases the practical goal is separation rather than punishment. A negotiated buyout that removes the offending partner, or lets the wronged partner exit on fair terms, can resolve the underlying problem without prolonged litigation.

Litigation 

Where the conduct is serious and other options fail, a lawsuit for breach of fiduciary duty can seek damages, disgorgement of what the partner improperly gained, and in some cases injunctive relief or removal. Owner oppression claims and requests for judicial dissolution may also be available depending on the facts. Litigation is expensive and public, so it is usually a path taken when the stakes justify it and other options are exhausted.

If You Are the One Being Accused

Fiduciary duty disputes have two sides, and a partner accused of a breach has real exposure that should be taken seriously. Conduct that seemed reasonable at the time, taking a draw, pursuing a side opportunity, entering a transaction with a related company, can look different when scrutinized later. The right response to an accusation is not to dig in or take unilateral action, but to understand the actual obligations, review what the records show, and get advice before responding. Continuing the challenged conduct after an accusation, or retaliating against the accusing partner, tends to make the exposure worse.

Addressing It Deliberately

Breach of fiduciary duty claims among partners are serious, fact-intensive, and often emotionally charged, because they involve a partner who was trusted. Whether you suspect a partner has crossed the line or have been accused of doing so, the situation calls for a deliberate response grounded in what the records show and what the duties actually require, rather than a reaction driven by the breakdown in trust. Acting on documentation and advice, rather than instinct, tends to produce better outcomes on both sides.

Oxbridge Legal Services PLLC works with Michigan business owners on fiduciary duty disputes and other partnership conflicts, whether pursuing a claim or defending against one. If you are dealing with a situation involving a partner's conduct and want to understand your options, click here to schedule a consultation.