In a single agency relationship, the agent owes fiduciary duties to the principal, and the principal does not owe them back. The agent represents only that one client, and that exclusivity is what loads the full set of fiduciary obligations onto the agent alone: loyalty, confidentiality, disclosure, obedience, accounting, and reasonable care. The principal receives the protection; the agent carries the weight.
This one-way structure is what separates agency from an ordinary contract. In a contract, both sides owe each other what they promised. In a fiduciary relationship, one side has agreed to act on the other’s behalf and under the other’s control, and the law responds by holding that side to a far higher standard than arm’s-length dealing requires.1Legal Information Institute. Principal The Restatement (Third) of Agency builds the word “fiduciary” directly into its definition of agency, so these duties attach the moment the relationship forms, whether or not anyone spells them out in writing.2OpenCasebook. Restatement of Agency (Third) Excerpts
A quick boundary before the duties themselves: single agency is the arrangement where one agent represents one side only. If one agent represents both sides of the same transaction, that is dual agency, and some of the duties below are reduced or waived by consent. If a professional helps both parties close a deal without representing either, that is transaction brokerage, and no fiduciary duties attach at all. The duties described here are the full set that applies when the agent works for you and only you.
The Six Duties the Agent Owes You
Loyalty
Loyalty is the cornerstone. The Restatement puts it broadly: “An agent has a fiduciary duty to act loyally for the principal’s benefit in all matters connected with the agency relationship.”3OpenCasebook. Restatement of Agency (Third) Excerpts – Section: 8.01 The agent cannot secretly profit from the relationship, cannot represent a competing interest without permission, and cannot steer you toward a decision that benefits the agent at your expense.
Self-dealing is the usual way agents violate this duty. An agent who takes “a material benefit from a third party in connection with transactions conducted … on behalf of the principal” has crossed the line.4OpenCasebook. Restatement of Agency (Third) Excerpts – Section: 8.02 A real estate agent who nudges a buyer toward a particular property because the seller is quietly offering a higher commission, without saying so, is the textbook case. So is an agent who buys the principal’s property through a shell company to hide the conflict.
Confidentiality
The agent must protect your private information and cannot use it for personal gain or share it with outsiders. The Restatement forbids an agent from using or communicating “confidential information of the principal for the agent’s own purposes or those of a third party.”5OpenCasebook. Restatement of Agency (Third) Excerpts – Section: 8.05 For a buyer’s agent, that means never telling the seller the top number you’d actually pay. For a financial advisor, it means not sharing one client’s strategy with another who might trade against it. Confidentiality also tends to outlast the formal relationship: sensitive information should stay protected after the deal closes, and many state licensing statutes make that obligation explicit.
Disclosure
An agent must share all material facts that could affect your decisions. A material fact is anything a reasonable person would want to know when deciding whether and how to proceed: something that changes the perceived value of a deal, reveals a hidden risk, or affects your willingness to move forward. Sitting on bad news because it might kill a deal the agent wants to close is exactly what this duty is designed to prevent.
Obedience
The agent must follow your lawful instructions, even when the agent thinks you’re wrong. The Restatement requires the agent to “take action only within the scope of the agent’s actual authority and to comply with all lawful instructions received from the principal.”6OpenCasebook. Restatement of Agency (Third) Excerpts – Section: 8.09 If a seller tells their agent not to accept anything below a stated price, the agent cannot accept a lower offer just because the agent believes the seller is being unrealistic. The one limit is that obedience doesn’t extend to illegal instructions.
Accounting
The agent must keep accurate records of every dollar, document, and piece of property handled on your behalf, and must never mix your funds with the agent’s own. In real estate, this usually means depositing earnest money into an escrow or trust account rather than an operating account. At any point in the relationship, the agent should be able to produce a clean accounting on request.
Reasonable Care
The agent must bring competent skill and diligence to the work. For a licensed professional, the standard reflects the training and licensure the agent holds, not what a layperson might manage. An agent who misses an obvious title defect, skips the comparable sales research, or overlooks a standard contract clause may have breached this duty even without any intent to harm you.
What the Principal Owes Back
The principal does not owe fiduciary duties to the agent, but the relationship isn’t a free ride either. You are generally expected to pay the agent as agreed, give the agent truthful information needed to do the job, and not interfere with the agent’s authorized activities. These are contract obligations, not fiduciary ones. That distinction matters because the remedies for breaching a contract are usually less severe than the remedies for breaching a fiduciary duty.
Principals also carry some exposure for what their agents do. Under vicarious liability, you can be held responsible for harm your agent causes while acting within the authority you granted. If your listing agent makes fraudulent statements about a property’s condition, you may share the legal fallout even if you never said a word yourself. That risk is a practical reason to pick a competent, ethical agent in the first place.
When the Principal Can Waive These Duties
Fiduciary duties aren’t absolute. The Restatement allows a principal to consent to conduct that would otherwise breach the agent’s duties, but only under tight conditions. The agent must act in good faith when seeking consent, must disclose “all material facts that the agent knows, has reason to know, or should know would reasonably affect the principal’s judgment,” and must otherwise deal fairly.7OpenCasebook. Restatement of Agency (Third) Excerpts – Section: 8.06 The consent must also be specific, either approving a particular transaction or a clearly defined type of transaction that would reasonably come up.
Dual agency is the most common place this comes up. When both parties agree to let one agent represent both sides, they are consciously waiving the full duty of loyalty for the convenience of a single-agent arrangement. Whether that trade works out depends on how much the parties’ interests actually conflict. In complex, high-value deals, surrendering your agent’s undivided loyalty is a trade most real estate attorneys would advise against.
What a Breach Costs the Agent
Courts take fiduciary breaches seriously because the principal has trusted the agent with real authority over their affairs. The remedies stack:
- Compensatory damages. The principal recovers the actual financial harm caused by the breach. If undisclosed structural defects force a buyer to spend $40,000 on repairs, that figure is on the table.
- Disgorgement of commissions and profits. A disloyal agent can be ordered to give back every dollar earned during the period of breach, not just the profit from the specific wrongful act. The point isn’t to compensate the principal but to deter disloyalty by stripping the agent of any benefit.
- Rescission. In some cases the principal can unwind the entire transaction, putting the parties back where they started before the misconduct tainted the deal.
- Punitive damages. When the breach involves intentional fraud or malice, many states allow additional damages meant to punish the agent and deter others.
- License revocation. State licensing boards can suspend or permanently revoke a professional license for serious fiduciary misconduct, ending the agent’s career in the field.
Disgorgement is where agents most often misjudge their exposure. Even an agent who behaved well on most matters can lose the entire fee if a court finds a single undisclosed conflict of interest. Courts have wide discretion and tend to use it, because the whole system depends on agents being trustworthy.
When These Duties End
Fiduciary duties last as long as the agency relationship does. The usual triggers for termination:
- Completion of the task. A listing agent’s duties end once the sale closes and any post-closing obligations are fulfilled.
- Mutual agreement. Either party can end the relationship with the other’s consent, though the underlying contract may impose notice requirements or financial consequences.
- Revocation or renunciation. The principal can revoke the agent’s authority, and the agent can resign. Either move may trigger contract liability, but it still ends the fiduciary obligations going forward.
- Death or incapacity. If either party dies or becomes mentally incapacitated, the relationship generally ends automatically.
- Impossibility or illegality. If the purpose becomes impossible to perform or a change in law makes it illegal, the relationship ends by operation of law.
One narrow exception: an “agency coupled with an interest,” where the agent holds a stake in the subject of the agency, such as a security interest in property, survives events that would ordinarily end things, including the principal’s death. Outside that exception, once the agency is over the agent is free of fiduciary obligations going forward, with confidentiality the one duty that keeps running in practice.