The three primary fiduciary duties are the duty of loyalty, the duty of care, and the duty of good faith. Together they set the highest standard of conduct the law recognizes, and they apply to anyone entrusted with managing another person’s money, property, or legal interests. A fiduciary who falls short can be ordered to pay damages, return profits, lose their fees, or be removed from the role entirely.
The Duty of Loyalty
Loyalty is the cornerstone. It requires the fiduciary to put your interests ahead of their own, without exception. No self-dealing. No secret profits. No divided allegiances.1Legal Information Institute. Duty of Loyalty
Most loyalty violations trace back to a conflict of interest. A trustee who steers a transaction toward a family member, an adviser who negotiates on both sides of a deal, a director who accepts undisclosed compensation from a third party: each has breached loyalty whether or not actual harm resulted. The rule guards against the appearance of competing interests, not only proven damage.
The same principle reaches well beyond the boardroom. A trustee who uses trust funds to make personal loans, a financial adviser who pushes high-commission products over better alternatives, or a guardian who redirects a ward’s income toward personal expenses all violate the same duty.2Legal Information Institute. Fiduciary Duties of Trustees
Corporate Opportunity: Loyalty in Concrete Form
A specific branch of loyalty, the corporate opportunity doctrine, shows how the duty operates in practice. If a director or officer learns of a business opportunity that falls within the company’s line of business, they can’t quietly take it for themselves. Delaware courts weigh four factors: whether the company could financially pursue the opportunity, whether it falls within the company’s existing business, whether the company has an interest or expectancy in it, and whether taking it personally would conflict with the fiduciary’s duties.3Legal Information Institute. Corporate Opportunity The fiduciary must disclose the opportunity to the board before acting on it.
The Duty of Care
Care requires the fiduciary to bring reasonable skill, diligence, and attention to their decisions. The benchmark is the prudent-person test: would a reasonably careful person in a similar role, with similar knowledge, have made the same choice? You don’t have to be right. You do have to show you did the work.4Legal Information Institute. Duty of Care
In day-to-day practice, this shows up in the details. A corporate director reads the financial reports before voting on a merger instead of rubber-stamping what management recommends. A trustee researches investment options before committing trust assets. When a decision involves specialized knowledge, like tax implications, real estate valuation, or medical treatment for a ward, the duty of care includes getting professional advice rather than guessing.
The Prudent Investor Standard
For trustees managing investment portfolios, the Uniform Prudent Investor Act sharpens care into specific expectations. Trustees evaluate the portfolio as a whole, balancing risk tolerance, beneficiary needs, inflation, tax consequences, and liquidity. The Act incorporates modern portfolio theory, emphasizing diversification and total return over fixating on any single asset’s performance.5Legal Information Institute. Uniform Prudent Investor Act Most states have adopted some version.
The Duty of Good Faith
Good faith requires honest conduct and genuine intent to fulfill the role. A fiduciary who deliberately ignores red flags, acts for a purpose other than the beneficiary’s benefit, or knowingly violates the law has breached this duty, even if the specific act doesn’t fit neatly into a loyalty or care violation.6Legal Information Institute. Duty of Good Faith
There is a legal nuance here worth knowing. In 2006, the Delaware Supreme Court held in Stone v. Ritter that good faith is not a freestanding fiduciary duty but a component of the duty of loyalty. Other jurisdictions still treat good faith as a distinct duty. In everyday practice the distinction matters less than you might expect: whether bad faith is its own category or a subset of loyalty, the conduct it prohibits remains actionable either way.
Where good faith earns its separate place is in the gray areas. A fiduciary who technically follows the letter of a trust document while deliberately undermining its purpose hasn’t violated a specific loyalty or care rule in the traditional sense. Good faith catches that conduct by asking whether the fiduciary was genuinely trying to do their job.
Who Owes These Duties
Fiduciary duties arise whenever one person accepts responsibility to act on another’s behalf. The specific obligations look slightly different by relationship, but loyalty, care, and good faith run through all of them.7Legal Information Institute. Fiduciary Duty
Trustees
A trustee manages property for one or more beneficiaries. This is the textbook fiduciary relationship. The trustee must invest prudently, avoid self-dealing, treat multiple beneficiaries impartially, and keep accurate records. When a trust has both current income beneficiaries and future remainder beneficiaries, the trustee can’t favor one group over the other.2Legal Information Institute. Fiduciary Duties of Trustees
Corporate Directors and Officers
Directors and officers owe fiduciary duties to the corporation and its shareholders. They must make informed business decisions, avoid conflicts of interest, and refrain from diverting corporate opportunities for personal gain.1Legal Information Institute. Duty of Loyalty
Investment Advisers
Registered investment advisers are fiduciaries under federal law. The SEC has confirmed that their duty, rooted in the Investment Advisers Act of 1940, requires them to act in clients’ best interests at all times and never place their own financial interests ahead of the client’s.8U.S. Securities and Exchange Commission. Commission Interpretation Regarding Standard of Conduct for Investment Advisers Broker-dealers operate under Regulation Best Interest, which the SEC has said is not identical to the full fiduciary duty that applies to investment advisers.9U.S. Securities and Exchange Commission. Regulation Best Interest and the Investment Adviser Fiduciary Duty
ERISA Retirement Plan Fiduciaries
Anyone with discretionary control over a workplace retirement plan’s management, assets, or administration is a fiduciary under ERISA. The statute requires them to act solely in the interest of plan participants, invest prudently, diversify to minimize the risk of large losses, and follow plan documents to the extent they’re consistent with ERISA.10GovInfo. 29 USC 1104 – Fiduciary Duties A breaching fiduciary is personally liable to restore plan losses and must return any profits gained through misuse of plan assets.11Office of the Law Revision Counsel. 29 USC 1109 – Liability for Breach of Fiduciary Duty
Attorneys, Guardians, and Agents
Attorneys owe fiduciary duties to their clients, which is why attorney-client privilege and conflict rules exist. Guardians appointed to care for minors or incapacitated adults are fiduciaries to their wards. An agent acting under a power of attorney must manage the principal’s affairs with care, avoid self-dealing, keep accurate records, and stay within the authority granted by the document.12Consumer Financial Protection Bureau. What Is a Fiduciary
When a Bad Outcome Isn’t a Breach
A losing decision does not, by itself, mean a fiduciary breached their duties. In the corporate context, the business judgment rule protects directors who make losing decisions, provided the decision was made in good faith, with reasonable care, and with a genuine belief it served the corporation. Courts presume the board acted properly, and the person challenging the decision carries the burden of proving otherwise.13Legal Information Institute. Business Judgment Rule
That presumption isn’t bulletproof. A plaintiff can overcome it by showing gross negligence, bad faith, or a conflict of interest. When any of those appear, the burden flips, and the board must prove that the process and substance of its decision were fair. Most fiduciary litigation against directors is decided on that question of process, not on whether the decision was smart in hindsight.13Legal Information Institute. Business Judgment Rule
Consequences of a Breach
When a fiduciary violates one of these duties, courts have a wide range of tools to make the injured party whole.
- Compensatory damages for the actual financial harm the breach caused, including lost profits and consequential losses.
- Disgorgement of profits the fiduciary gained through the breach, even where no specific loss can be proven. A director who diverted a corporate deal owes those profits back regardless of whether the company would have pursued the same deal.
- Removal from the role. Under ERISA this power is statutory. In trust law, courts weigh whether the trustee’s conduct harmed the trust or put beneficiaries at unreasonable risk, and removal can follow repeated neglect even before assets are depleted.11Office of the Law Revision Counsel. 29 USC 1109 – Liability for Breach of Fiduciary Duty
- Forfeiture of fees or compensation earned during the period of misconduct.
- Injunctive relief ordering the fiduciary to stop specific conduct, which matters most when the breach is ongoing.
- Punitive damages in egregious cases involving fraud, malice, or gross negligence, where the jurisdiction allows them. Ordinary negligence won’t get a plaintiff there.
Deadlines for Bringing a Claim
Fiduciary breach claims carry filing deadlines, and missing them can forfeit the claim entirely. For ERISA retirement plan claims, federal law sets a clear framework: six years from the breach, or three years from the date you gained actual knowledge of it, whichever comes first. Where the fiduciary concealed the breach through fraud, the deadline extends to six years from discovery.14Office of the Law Revision Counsel. 29 USC 1113 – Limitation of Actions
Outside ERISA, limitations periods are set by state law and vary. Some states apply general fraud or contract limitations (often three to six years); others have specific statutes for trust or corporate fiduciary disputes. The clock may start from the date of the breach, from the date the beneficiary discovered or should have discovered it, or from the date the fiduciary relationship ended. If you suspect a breach, getting legal advice early protects your ability to act. Waiting to see how things play out is how valid claims expire.