Agency law is one of the core subject areas on every state’s real estate salesperson exam, and it’s also one of the most practically important concepts for actually working in the field. At its core, agency is about a single question: who does the agent legally represent, and what duties does that create? Here’s how the main relationships break down.
What “agency” means in this context
An agency relationship is created when one party (the agent) is authorized to act on behalf of another party (the principal or client) in dealings with third parties. In real estate, this typically happens through a signed agreement — a listing agreement with a seller, or a buyer representation agreement with a buyer. Once that agency relationship exists, the agent owes the client a set of fiduciary duties: things like loyalty, confidentiality, disclosure of material facts, obedience to lawful instructions, reasonable care and skill, and accounting for funds handled on the client’s behalf. These duties, and their exact legal names, are commonly tested and worth knowing cold.
Related: What to Expect on Your State’s Real Estate Salesperson Licensing Exam
The listing agent (seller’s agent)
A listing agent represents the seller. Their fiduciary duties run to the seller — negotiating the best possible price and terms for the seller, and keeping the seller’s confidential information (like their bottom-line price or motivation to sell) private from the buyer. A listing agent can still be honest and professional with buyers, but their legal loyalty belongs to the seller.
The buyer’s agent
A buyer’s agent represents the buyer under a similar set of fiduciary duties — negotiating the best price and terms for the buyer, and keeping the buyer’s confidential information private from the seller. Historically, agents working with buyers sometimes acted as sub-agents of the seller rather than true buyer’s agents, but true buyer representation is now the standard, well-established practice, and most states require an agent to disclose which party they represent early in the relationship.
Dual agency
Dual agency occurs when the same agent (or, depending on state law, the same brokerage) represents both the buyer and seller in the same transaction. Because the agent now owes full fiduciary duties to two parties with opposing interests — the seller wants the highest price, the buyer wants the lowest — dual agency inherently limits how fully an agent can advocate for either side, particularly around negotiating price and disclosing confidential information. For this reason, dual agency is handled very differently from state to state: some states permit it with informed written consent from both parties, some restrict it, and some prohibit it outright. Always check your own state’s specific rule rather than assuming dual agency works the same way everywhere — this is a frequent source of state-portion exam questions.
Designated agency, a related variation
Many states that allow dual agency also recognize a variation sometimes called designated agency, where two different agents at the same brokerage are each designated to represent the buyer and the seller separately, rather than one agent representing both. This is meant to preserve more individual advocacy than pure dual agency while still keeping the transaction inside one brokerage. Whether this option exists, and what it’s called, depends on state law.
Bottom line
Every agency question ultimately comes back to the same test: who does this agent legally represent, and what duties flow from that? Get comfortable applying that question to scenarios — not just reciting the definitions of listing agent, buyer’s agent, and dual agency — and then confirm how your own state specifically regulates dual and designated agency before exam day.