1. The Four Core Fiduciary Duties under New York Law
Not all fiduciary relationships impose the same obligations, and not all four duties apply in every context. Courts look at what the relationship required and whether that specific obligation was violated.
| Duty | Core obligation | Common violation |
| Loyalty | Act in the beneficiary's interest, not one's own | Self-dealing, undisclosed conflicts |
| Care | Exercise the judgment of a reasonably prudent person | Uninformed or negligent decision-making |
| Disclosure | Provide all material information | Concealing conflicts, withholding relevant facts |
| Obedience | Act within authorized scope and applicable law | Exceeding authority, violating governing documents |
New York Business Corporation Law § 717 requires corporate directors to act in good faith and with the degree of care that an ordinarily prudent person in a similar position would use. Officers acting in their official capacity are held to the same standard.
2. When a Fiduciary'S Conduct Becomes a Breach
Not every poor decision or bad outcome gives rise to a claim. New York courts look at whether the conduct, measured against the duty owed, fell short of the required standard in a way that caused concrete harm.
To prevail on a breach of fiduciary duty claim in New York, a plaintiff must prove:
- A fiduciary relationship existed between the parties
- The defendant breached a specific duty owed under that relationship
- The breach directly caused harm to the plaintiff
- The plaintiff suffered measurable damages
The business judgment rule gives corporate decision-makers protection from hindsight challenges. Recognized by New York's Court of Appeals in Auerbach v. Bennett, 47 N.Y.2d 619 (1979), the rule holds that courts will not second-guess a decision made by a disinterested board, on an informed basis, and in good faith. It protects the process of decision-making, not the outcome. A director who made a bad call after careful deliberation generally fares better than one who made a lucky call without doing any
3. Fiduciary Relationships and How New York Courts Treat Them
The standard applied to a breach depends on the type of relationship at issue. New York courts have developed separate frameworks for each common context, and the differences affect how liability attaches and what defenses are available.
Corporate Directors and Officers
Directors owe duties of loyalty and care to the corporation and its shareholders. An interested director, meaning one with a financial stake in a transaction, must disclose that interest before the board votes. Under BCL § 713, the transaction may still stand if disinterested directors approve it after full disclosure, or if it is shown to be fair to the corporation. Without either, the transaction is voidable. Our attorneys advise on corporate director liability and governance disputes in New York.
Attorneys and Clients
The attorney-client relationship carries some of the most clearly defined fiduciary obligations in New York. The New York Rules of Professional Conduct require attorneys to avoid conflicts of interest, act solely in the client's interest, and maintain confidentiality. A violation can support an independent breach of fiduciary duty claim, separate from or alongside a legal malpractice action, depending on the facts.
Trustees and Beneficiaries
Trustees in New York are governed by the Estates, Powers and Trusts Law and the Surrogate's Court Procedure Act. Under EPTL § 11-2.3, trustees must invest assets in accordance with the prudent investor standard. Common breaches include self-dealing, failure to diversify, commingling of funds, and withholding accountings from beneficiaries. Our firm handles trust and estate litigation involving trustee misconduct across New York.
Business Partners and Llc Members
Managers of New York LLCs owe fiduciary duties under NY LLC Law § 409, which can be modified by the operating agreement but not eliminated entirely. In closely held companies, courts also recognize heightened duties among partners where one party holds dominant control. Disputes typically center on the diversion of business opportunities, competing ventures entered without disclosure, or unauthorized use of company assets.
4. How Breach of Fiduciary Duty Is Proven in Court
Documentary evidence forms the foundation of most fiduciary breach cases, and gaps in the record tend to hurt claimants more than defendants. Financial records, board minutes, internal communications, wire transfers, and transaction documents are the starting point for most claims.
In complex corporate or trust matters, expert witnesses are typically needed to establish what the applicable standard of care required and where the fiduciary's conduct fell short. Courts do not presume negligence or disloyalty from a bad outcome alone.
The burden of proof rests on the plaintiff by a preponderance of the evidence. Where self-dealing is at issue, however, New York courts may shift that burden. Once a plaintiff demonstrates an interested transaction, the defendant fiduciary must show the transaction was fair. That shift can be dispositive in disputes over closely held businesses and family trusts.
5. Remedies Available for Breach of Fiduciary Duty
New York courts have broad equitable authority in fiduciary breach cases, and relief is not limited to what a plaintiff can calculate in dollar terms. The purpose is to undo the harm and remove any financial incentive to breach.
Available remedies include:
- Compensatory damages for direct financial losses caused by the breach
- Disgorgement of profits the fiduciary obtained through the breach, regardless of whether the plaintiff suffered an equivalent loss
- Constructive trust over wrongfully obtained assets
- Injunctive relief to prevent ongoing or future harm
- Removal of the fiduciary, available in trust and corporate contexts
Disgorgement does not require a dollar-for-dollar showing of loss. New York courts award it to strip the fiduciary of any gain derived from the breach, which functions as both restitution and deterrence. Our attorneys handle fiduciary breach claims and complex business disputes across New York.
6. Defenses against a Fiduciary Breach Claim
Defending these claims in New York requires more than contesting the plaintiff's version of events. The defenses that work are specific to what happened at the time the decision was made, not how things look in hindsight.
Business Judgment Rule
For corporate defendants, this is the primary defense. Courts will not substitute their judgment for that of a director whose decision was made by a disinterested party, on a fully informed basis, and in good faith. The focus is on the decision-making process. A bad outcome does not defeat the defense if the deliberation was sound.
Ratification and Informed Consent
A breach may be defeated if the affected party gave voluntary, informed consent after full disclosure of all material facts. Courts look closely at whether the disclosure was genuinely complete and whether consent was freely given. Post-hoc approval by an interested party, or consent obtained without full disclosure, does not satisfy this defense.
Statute of Limitations
New York applies different limitations periods depending on the relief sought. Claims for equitable relief, including disgorgement and constructive trust, are subject to a six-year period under CPLR § 213. Claims seeking purely monetary damages may fall under the three-year period in CPLR § 214(4). The accrual date is frequently disputed, particularly where the breach was concealed. Our attorneys advise on fiduciary litigation timelines and defense strategy across New York.
11 Mar, 2026
