A fiduciary agent is a person who is legally required to act in someone else’s best interest when managing that person’s assets, money, or decisions. The relationship pairs an agent (the fiduciary) with a principal or beneficiary who is relying on them, and because the agent holds control or specialized knowledge the other party lacks, the law imposes a higher standard of conduct than ordinary business dealings. That standard shows up as three duties the agent must follow for the entire time the relationship lasts: loyalty, care, and good-faith disclosure.
What a Fiduciary Agent Owes You
Three duties sit at the center of every fiduciary role, whether the agent is a trustee, a corporate director, a lawyer, or someone holding your power of attorney.
Loyalty
The duty of loyalty requires the agent to put your interests ahead of their own and ahead of any third party’s. Self-dealing — using the position for personal benefit — is the most common violation. An agent who secretly profits from a transaction they were handling for you can be ordered to turn over those profits and pay additional damages. Courts look at whether loyalty was undivided throughout the relationship, not just at the moment a deal closed.
Care
The duty of care requires the agent to act with the skill, diligence, and judgment that a reasonably careful person in a similar position would use. Good intentions are not enough. The duty also covers the technical quality of research, analysis, and decision-making, so an agent who skips standard practices or fails to investigate options before a financial decision can be personally liable for losses, even without any intent to harm.
Good Faith and Disclosure
The duty of good faith stops an agent from exploiting technicalities or hiding information that would affect your choices. Full disclosure is central: the agent must share any fact that could reasonably influence your decisions, including conflicts of interest. Failing to reveal a conflict can void a contract or trigger civil liability. These duties apply even when the agent serves without pay.
You can sometimes waive a specific conflict, but the waiver only works if the agent first gives you a clear, detailed explanation of the conflict and you provide informed consent. Vague language suggesting a conflict “may” exist, rather than confirming that it does, does not satisfy the disclosure requirement.
Common Types of Fiduciary Agents
Trustees and Executors
A trustee manages assets held in a trust for the benefit of named beneficiaries, including investing trust assets, handling tax filings, and distributing funds under the trust document.1Fidelity. Trustee vs. Executor: What’s the Difference? A trustee who mishandles or takes trust property is personally liable, and beneficiaries can recover misappropriated assets as long as those assets can be traced back to the trust.2Justia. Trustees’ Legal Duties and Liabilities
An executor, sometimes called a personal representative, fills a similar role for a deceased person’s estate. The executor guides the estate through probate by gathering assets, paying debts and taxes, and distributing property under the will or state law.3Justia. The Duties of an Executor of an Estate
Power of Attorney Holders
A power of attorney is a legal document that gives one person (the agent, or attorney-in-fact) authority to make financial or medical decisions for another (the principal). The principal may be incapacitated or may simply want help managing their affairs. The agent must stay strictly within the authority the document grants. Using a power of attorney to transfer the principal’s property to yourself without explicit permission is a serious abuse that can lead to criminal charges.
Corporate Officers and Directors
Officers and directors of a corporation owe fiduciary duties to the company’s shareholders. They must make decisions aimed at advancing the company’s interests rather than enriching themselves or wasting corporate resources. When directors breach those duties through self-dealing, negligence, or other misconduct, shareholders can bring a derivative lawsuit on behalf of the corporation, and any money recovered goes back to the company rather than directly to the individual shareholder.
Lawyers
Attorneys owe fiduciary duties to their clients, rooted in loyalty. A lawyer cannot represent a client if the representation creates a direct conflict with another current client, or if there is a significant risk that the lawyer’s responsibilities to someone else, including the lawyer’s own interests, would interfere. These rules extend to former clients: a lawyer generally cannot later represent an opposing party in the same or a closely related matter, particularly where confidential information from the earlier representation could be used against the former client.
Real Estate Agents
A real estate agent representing a buyer or seller owes fiduciary duties to that client. These include seeking the most favorable deal possible, disclosing all material facts about a property such as known defects, and avoiding placing personal interests above the client’s. If the agent has a personal stake in the transaction, such as buying the property themselves, they must either withdraw or fully disclose the interest and obtain informed consent. An agent also cannot share the price or key terms of one party’s offer with a competing party without express permission.
Investment Advisers
Registered investment advisers are fiduciaries under the Investment Advisers Act of 1940, which makes it unlawful for an adviser to use any scheme to defraud a client or engage in any practice that operates as a fraud or deceit on a client.4Office of the Law Revision Counsel. 15 USC 80b-6 – Prohibited Transactions by Investment Advisers The Supreme Court has described this as reflecting a congressional understanding of the “delicate fiduciary nature of an investment advisory relationship” and an intent to expose all conflicts of interest that might lead an adviser to give advice that is not disinterested.5U.S. Securities and Exchange Commission. SEC v. Capital Gains Research Bureau, Inc. The duty applies to the whole advisory relationship, not just individual recommendations.
Retirement Plan Fiduciaries
Under the federal Employee Retirement Income Security Act (ERISA), a person becomes a fiduciary to the extent they exercise discretionary control over a retirement plan’s management, provide investment advice for a fee, or hold discretionary responsibility for administering the plan.6Office of the Law Revision Counsel. 29 USC 1002 – Definitions Fiduciary status here is based on function, not job title. ERISA fiduciaries must act solely in the interest of plan participants, use the care and skill of a prudent person familiar with such matters, and diversify plan investments to minimize the risk of large losses.7Office of the Law Revision Counsel. 29 USC 1104 – Fiduciary Duties
Not Every Financial Professional Is a Fiduciary
The fiduciary label matters most when people assume it applies and it does not. Broker-dealers operate under a different standard called Regulation Best Interest (Reg BI). Reg BI requires a broker-dealer to act in a retail customer’s best interest when making a recommendation, but it only applies at the moment of recommendation. It does not govern the full relationship the way the fiduciary standard governs an investment adviser’s work. A broker-dealer under Reg BI must disclose conflicts and establish policies to mitigate them, but is not required to eliminate every conflict. A fiduciary investment adviser must either eliminate a conflict entirely or provide full disclosure and obtain the client’s informed consent.8U.S. Securities and Exchange Commission. Staff Bulletin: Standards of Conduct for Broker-Dealers and Investment Advisers Conflicts of Interest
If you are hiring a financial professional, ask directly whether they act as a fiduciary at all times or only when making specific recommendations. The answer tells you how much protection you actually have.
How a Fiduciary Relationship Starts
A fiduciary relationship can form in several ways. The most direct is an express agreement, such as a written contract, trust document, retainer, or power of attorney spelling out the agent’s authority and responsibilities. A court can also appoint someone as a guardian or personal representative for a person who cannot manage their own affairs, which creates an immediate fiduciary obligation regardless of any private contract.
A fiduciary relationship can also arise by implication, based on how the parties interact rather than a signed document. Whether an agency relationship exists does not depend on whether the parties intended to create one; what matters is their conduct and whether it shows mutual consent that one person will act on behalf of the other.9Legal Information Institute. Wex Fiduciary Relationship Courts look at whether one person placed significant trust in another’s specialized knowledge and whether the circumstances gave that person a position of influence or control. A generalized sense of trust is usually not enough; there needs to be real evidence of the power imbalance and reliance that justify imposing fiduciary duties.
What Happens When a Fiduciary Breaches Their Duties
When a fiduciary fails to meet their obligations, the consequences can be serious. The specific remedies vary with the type of relationship and the governing law, but they generally fall into a few categories.
- Compensatory damages. The fiduciary may owe the losses the principal or beneficiary suffered. A trustee who makes reckless investments, for example, can be ordered to pay the difference between the trust’s current value and what prudent management would have produced.
- Disgorgement of profits. If the fiduciary made money from the breach, a court can order them to hand over those profits even if the principal did not suffer a direct financial loss. The point is to strip away any incentive for self-dealing.
- Removal. Courts can remove a fiduciary who has engaged in misconduct, become insolvent, failed to account for assets, or otherwise proven unsuitable, and then appoint a successor.
- Voided transactions. Deals tainted by a fiduciary’s undisclosed conflict of interest can be set aside entirely.
- Criminal liability. In serious cases involving theft, fraud, or deliberate misuse of a power of attorney, the fiduciary can face criminal prosecution.
Under ERISA specifically, a retirement plan fiduciary who breaches their duties must personally make the plan whole for any losses and return any profits earned through the misuse of plan assets.10Office of the Law Revision Counsel. 29 USC 1109 – Liability for Breach of Fiduciary Duty A fiduciary is not liable for breaches that happened before they took the role or after they left it.
How a Fiduciary Relationship Ends
Fiduciary relationships are not permanent. They usually end when the purpose of the arrangement is fulfilled, such as when all trust assets have been distributed or an estate has been fully administered. Other common endings include:
- Death of the principal or fiduciary. Death generally ends the relationship, though the fiduciary’s estate can still be answerable for actions taken before death.
- Resignation. A fiduciary can step down, often with court approval. The court may require a full accounting before accepting the resignation and may appoint a successor.
- Court removal. A court can force a fiduciary out for misconduct, mismanagement, failure to follow court orders, failure to file required accountings, or becoming otherwise unfit.
- Revocation by the principal. In many arrangements, especially powers of attorney, the principal can revoke the agent’s authority at any time, as long as the principal has the legal capacity to do so.
- Changed circumstances. A guardianship of a minor ends when the person turns 18. A guardianship based on incapacity can end when the person regains capacity.
Once the relationship ends, the former agent has no further authority to act for the principal, but can still be held liable for breaches that happened while the relationship was active.