A single agent in real estate is a licensed broker or salesperson who represents only one party in a transaction—either the buyer or the seller, never both—and owes that client the highest level of legal obligation the law recognizes in a brokerage relationship. Those obligations include loyalty, confidentiality, obedience, full disclosure, accounting, and reasonable care. If you hire a single agent, that person is your advocate: they negotiate for your price, guard your private information, and put your interests ahead of everyone else’s at the table, including their own.
That’s a meaningfully different arrangement than the other options a brokerage can offer you, and the difference is where most of the practical value lives.
The Duties a Single Agent Owes You
When you sign on with a single agent, a specific bundle of fiduciary duties attaches to the relationship. The statutory wording varies by state, but the core duties look the same almost everywhere.
Loyalty. Your agent cannot place their own financial interests, or the other party’s interests, above yours. If a conflict exists—say, the agent would earn more by steering you to a particular property—they must either disclose it or step away from it.
Confidentiality. Your agent cannot reveal information that would weaken your position. The highest price you’d actually pay, the lowest price you’d actually accept, why you need to move, how quickly you need to close: none of that reaches the other side. This duty continues after closing. Your agent can’t disclose it next year either.
Full disclosure. Anything your agent learns that could affect your decisions has to come to you. That includes problems with the property, information about the other party’s situation, and anything bearing on the value of the deal.
Obedience. Your agent must follow your lawful instructions. If you say don’t present offers below a set figure, they comply. The one limit is that they can’t follow an instruction that would break the law.
Accounting. Your agent must properly handle and account for every dollar and document that passes through their hands, including earnest money and closing funds.
Reasonable care. Your agent must bring professional skill and diligence to the work—market knowledge, contract fluency, judgment—to protect your interests throughout.
Those duties are what distinguishes single agency from the alternatives. They’re also what you lose, in part or in whole, if the relationship ever shifts.
How Single Agency Differs From the Alternatives
Brokerage relationships in most states fall into three categories, and the gap between them is wider than it sounds.
A transaction broker helps both the buyer and the seller move the deal to closing without advocating for either side. A transaction broker still has to act honestly, disclose material facts about the property, and use reasonable skill. But no loyalty. No full confidentiality. In many states, transaction brokerage is the default relationship unless you agree to something different in writing. If you haven’t specifically asked for single agency, you may not have it.
A dual agent tries to represent both the buyer and the seller in the same transaction. Because the agent would owe loyalty to two people whose financial interests are directly opposed, roughly eight states prohibit dual agency outright, and states that allow it require written consent from both parties first.
A variation some states permit is designated agency, where two agents inside the same brokerage each represent one side. The idea is that each client keeps a dedicated single agent even though both agents work under the same roof. Designated agency generally requires disclosure to and consent from both parties.
The practical difference comes down to advocacy. A single agent negotiates on your behalf and keeps your confidential information inside the relationship. A transaction broker keeps the paperwork moving without taking sides. If you want someone whose job is to get you the best outcome rather than to get the deal closed, single agency is the arrangement that delivers that.
What This Looks Like for a Buyer
A buyer’s single agent focuses on helping you find and purchase a home at the best price and terms available. They search for properties against your criteria, pull comparable sales to help you set an offer price, and draft or review purchase agreements for you.
In negotiations, your agent works to secure things like seller-paid closing costs, repair credits, and price reductions—moves a transaction broker wouldn’t push for because they can’t favor one side. Your agent can also tell you to walk away from a deal that isn’t right, which is the kind of advice that only makes sense coming from someone who owes you loyalty.
A buyer’s single agent can still handle basic, non-discretionary tasks for the seller, like opening a door for a showing or passing along a standard form. Those routine acts don’t create an agency relationship with the other side as long as they don’t involve judgment that could affect the negotiation.
What This Looks Like for a Seller
A seller’s single agent handles pricing, marketing, and the sale of your property with your financial goals as the priority. That means a market analysis to price the home, MLS and other platform listings, coordinating showings, and screening prospective buyers for ability to close.
When offers come in, your agent breaks down the net proceeds after commissions and closing costs on each one, flags which offer is actually strongest (price alone rarely tells the story—financing certainty and likelihood of closing matter too), and negotiates counteroffers aimed at the highest price and the best terms the market will support.
One limit worth knowing: your agent’s loyalty to you does not let them hide material defects from the buyer. Latent defects—hidden problems like foundation damage, plumbing issues, or water intrusion—aren’t treated as confidential information under the NAR Code of Ethics. If your agent knows about a material defect, they cannot conceal it on your behalf. Agents are only required to disclose problems reasonably apparent to someone with their training; they aren’t inspectors and have no duty to discover hidden defects, only to disclose what they actually know.1National Association of REALTORS. 2026 Code of Ethics and Standards of Practice
The Written Disclosure You Should Receive First
Before a single agent begins working on your behalf, most states require them to give you a written disclosure that spells out the nature of the relationship and the duties they owe you. The notice has to be delivered before or at the time you sign a listing agreement or buyer representation agreement, or before the agent shows you a property—whichever comes first.
The document does two things. It confirms the agent is acting as your exclusive advocate rather than as a neutral transaction broker, and it creates a written record that you understood and agreed to the arrangement. An agent who skips this step or delivers it late can face discipline from the state real estate commission. Keep a copy of every disclosure you sign. It establishes the legal framework for everything the agent does on your behalf.
The Written Buyer Agreement Rule That Took Effect in 2024
If you’re the buyer, there’s a newer piece of paperwork to know about. As of August 17, 2024, under the National Association of REALTORS settlement of litigation over broker commissions, a NAR-affiliated agent must have you sign a written buyer agreement before touring any home with you, in person or virtually.2National Association of REALTORS. Consumer Guide to Written Buyer Agreements
The agreement must specify the services the agent will provide and what they will be paid. Compensation has to be stated as a specific amount—a flat dollar fee, a set percentage, or an hourly rate—and cannot be left open-ended or expressed as a range.2National Association of REALTORS. Consumer Guide to Written Buyer Agreements
Compensation between you and your agent is negotiable; it isn’t set by law. You can still negotiate for the seller or the seller’s agent to cover your agent’s fee as part of the transaction, but the written agreement establishes who is ultimately on the hook. Read it before you sign. It’s a binding financial obligation.
If Your Agent Asks to Change the Relationship
Situations come up where a single agent needs to change roles. The most common one: a listing agent’s seller receives an offer from a buyer the same agent has also been working with. Because dual agency is prohibited or restricted in many states, the agent usually must transition to a transaction broker role before facilitating both sides.
That transition requires your written consent. The agent has to give you a disclosure form explaining that they will no longer owe you the same loyalty and full confidentiality they owed as your single agent. You are not required to agree. If you decline, the agent must continue representing you as your single agent and cannot represent the other party.
Don’t sign a transition disclosure under pressure. The moment you consent, you lose the full advocacy that defines single agency. In states that permit designated agency, the brokerage may be able to assign a different agent in the firm to the other party rather than downgrade your representation; it’s worth asking before you give up anything.
What Happens If a Single Agent Breaches Those Duties
If your agent violates a fiduciary duty, two tracks of consequence can follow.
State real estate commissions can discipline agents who break agency rules. Penalties include administrative fines, probation, license suspension for a period of years, or permanent revocation. Fine amounts vary by state and can reach $15,000 or more per violation in serious cases. You can file a complaint with your state’s real estate commission if you believe your agent acted improperly.
You may also have the right to sue for breach of fiduciary duty. If you can show the breach caused you financial harm, potential remedies include compensatory damages for your actual losses, forfeiture of some or all of the commission the agent earned, rescission of the transaction in serious cases, and punitive damages where the conduct involved intentional fraud or similarly egregious behavior. Statutes of limitations typically run two to six years depending on the state, so acting promptly matters—evidence gets harder to pull together as time passes.
The underlying point of single agency is that you have someone whose legal job is to look out for you. If that protection ever feels like it’s slipping, whether through a request to change the relationship or through conduct that doesn’t match the duties above, the leverage is yours. You chose this arrangement for a reason.