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Fiduciary Duties in Business Partnerships

Understand the fiduciary duties partners owe each other, including loyalty, care, and good faith, and how your partnership agreement can define them.

August 27, 20257 min readPactDraft Team

What Are Fiduciary Duties in a Partnership?

Fiduciary duties are legal obligations that require business partners to act in the best interests of the partnership and each other. They represent the highest standard of care recognized by law — partners must put the partnership's interests above their own personal interests in all business-related matters.

These duties exist because partners occupy positions of trust. Each partner has access to partnership funds, confidential information, and business opportunities. Fiduciary duties prevent partners from exploiting that access for personal gain at the expense of the partnership.

The Core Fiduciary Duties

Duty of Loyalty

The duty of loyalty is the most fundamental fiduciary obligation. It requires partners to:

Avoid self-dealing: Partners cannot engage in transactions with the partnership that benefit themselves at the partnership's expense. For example, a partner who owns a building can't lease it to the partnership at above-market rates without full disclosure and consent.

Refrain from competing: Partners generally cannot operate a competing business while they're part of the partnership. Diverting business opportunities that belong to the partnership to a personal venture violates the duty of loyalty.

Disclose conflicts of interest: When a partner has a personal interest that conflicts with the partnership's interests, they must disclose it fully. This includes financial interests in companies the partnership does business with, relationships with clients or vendors, and outside business activities.

Account for partnership property and opportunities: Partners must turn over to the partnership any profits or benefits they receive through the use of partnership property, information, or opportunities. A partner who learns about a business opportunity through their partnership role can't take it for themselves.

Duty of Care

The duty of care requires partners to make informed and reasonably diligent decisions when managing partnership business. This doesn't mean every decision must be perfect — it means partners must:

  • Act with reasonable diligence — Put in the effort to understand the issues before making decisions
  • Make informed decisions — Gather and consider relevant information before acting
  • Exercise reasonable judgment — Apply the level of care that a reasonably prudent person would use in similar circumstances
  • Avoid gross negligence — Partners who act recklessly or with willful disregard for the partnership's interests breach this duty

The duty of care protects partners from liability for honest mistakes or business decisions that turn out poorly. If a partner made a reasonable decision based on available information, they typically haven't breached their duty of care even if the outcome was bad.

Duty of Good Faith and Fair Dealing

This duty requires partners to act honestly and fairly in their dealings with each other and with the partnership. It encompasses:

  • Honesty in communications with other partners
  • Fairness in the exercise of discretionary authority
  • Compliance with the reasonable expectations of the partnership relationship
  • Not using the partnership agreement to unfairly disadvantage other partners

Fiduciary duties exist by law even if your partnership agreement doesn't mention them. However, most states allow the partnership agreement to modify (but not entirely eliminate) these duties, making it important to address them explicitly.

How Fiduciary Duties Apply in Practice

Business Opportunities

When a partner discovers a business opportunity through their partnership role, the "partnership opportunity doctrine" typically requires them to present it to the partnership first. The partnership then decides whether to pursue it. Only if the partnership declines can the partner pursue the opportunity personally.

What qualifies as a partnership opportunity?

  • Opportunities in the partnership's line of business
  • Opportunities discovered through use of partnership resources or relationships
  • Opportunities presented to the partner because of their partnership role
  • Opportunities the partnership has the financial ability to pursue

Financial Transparency

Fiduciary duties require complete financial transparency between partners:

  • All partners have access to partnership books and records
  • Financial transactions must be properly documented
  • Partners cannot conceal income, assets, or liabilities
  • Each partner must account for any partnership funds they handle

Confidential Information

Partners have a duty to protect confidential partnership information and not use it for personal benefit. This includes:

  • Client and customer information
  • Pricing and cost data
  • Trade secrets and proprietary processes
  • Strategic plans and business projections
  • Employee information

Modifying Fiduciary Duties in Your Agreement

Most states allow partnership agreements to modify fiduciary duties within certain limits. This flexibility is important because the default duties may be too restrictive for your partnership's needs.

Common Modifications

Permitting outside activities: The default duty of loyalty may prevent partners from engaging in any business outside the partnership. Many agreements specifically authorize partners to pursue outside interests, sometimes with restrictions on direct competition.

Related-party transactions: Rather than prohibiting all self-dealing, the agreement can allow related-party transactions that are disclosed and approved by a specified vote of disinterested partners.

Competition after departure: The agreement can define non-compete obligations that apply after a partner leaves, extending the duty of loyalty beyond the partnership's duration.

Standard of care: Some agreements change the liability standard from simple negligence to gross negligence or willful misconduct, giving partners more latitude in their decision-making.

What You Can't Modify

Most states set a floor below which fiduciary duties cannot be reduced. Typically, partnership agreements cannot:

  • Eliminate the obligation of good faith and fair dealing entirely
  • Unreasonably reduce the duty of loyalty
  • Eliminate the duty to account for partnership property
  • Authorize intentional misconduct or knowing violations of law

When modifying fiduciary duties in your agreement, be specific about what activities are permitted and what disclosure requirements apply. Vague modifications create uncertainty and litigation risk.

Breach of Fiduciary Duty

What Constitutes a Breach

Common scenarios that trigger fiduciary duty claims:

  • A partner secretly starts a competing business while still in the partnership
  • A partner uses partnership funds for personal expenses
  • A partner diverts a partnership opportunity to themselves
  • A partner conceals financial information from other partners
  • A partner makes major decisions without informing or involving other partners
  • A partner enters into contracts that benefit themselves at the partnership's expense

Remedies for Breach

Partners who breach fiduciary duties may face:

  • Disgorgement — Returning any profits made from the breach to the partnership
  • Monetary damages — Compensating the partnership for losses caused by the breach
  • Constructive trust — A court placing ill-gotten assets in trust for the partnership's benefit
  • Injunctive relief — A court order preventing further breach
  • Removal from the partnership — Forced buyout of the breaching partner's interest
  • Accounting — A court-ordered examination of the breaching partner's financial activities

Proving a Breach

To establish a breach of fiduciary duty, the complaining partner typically must show:

  1. A fiduciary relationship existed (automatic in partnerships)
  2. The partner breached their specific duty (loyalty, care, or good faith)
  3. The breach caused harm to the partnership or other partners
  4. Measurable damages resulted from the breach

Preventing Fiduciary Duty Disputes

Clear Expectations in the Agreement

The best prevention is a partnership agreement that clearly defines:

  • What outside activities are permitted
  • How conflicts of interest are identified and handled
  • What decisions require partner approval vs. individual authority
  • Financial reporting and transparency requirements
  • How business opportunities are identified and allocated

Regular Communication

Partners who communicate openly and frequently are less likely to face fiduciary duty issues. Regular partner meetings, financial reviews, and strategic discussions keep everyone informed and aligned.

Documented Decision-Making

Major partnership decisions should be documented in writing, including the information considered, the rationale for the decision, and the vote. This protects partners from after-the-fact claims that they breached their duty of care.

Annual Reviews

Conduct annual reviews of each partner's outside activities, potential conflicts of interest, and compliance with the partnership agreement. This proactive approach catches issues early before they become breaches.

Addressing Fiduciary Duties in Your Agreement

Fiduciary duties are the ethical backbone of your partnership. Addressing them explicitly in your agreement — rather than relying on default law — gives all partners clarity about their obligations and protections.

PactDraft's partnership agreement generator helps you define appropriate fiduciary duty provisions for your specific partnership — create your agreement now.

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