Laws of Agency: Real Estate Agent showing prospective buyers their new home and legal relationship between them.

Laws of Agency: What Every Real Estate Student Needs to Know to Pass the PSI Exam in 2026

By CRES Staff writer | PSI Salesperson & Broker Real Estate Exam Prep Series – 2026

If there’s one topic that trips up more real estate exam students than just about anything else, it’s agency law. Whether you’re sitting down for the national portion of the PSI exam or studying for your state-specific questions, understanding the Laws of Agency is absolutely essential. According to PSI’s exam content outline, Laws of Agency covers what agency is, how it is created and terminated, and the difference between the many kinds of agency relationships you’ll encounter in real estate.

The good news? Once you understand the core ideas, this topic starts to make a lot of intuitive sense. Think of it this way: when someone hires you to act on their behalf in a real estate deal, there are rules that govern exactly how you must behave. Those rules are what we call the Laws of Agency.

Let’s break it all down in a way that’s clear, direct, and exam-ready.

Why Agency Law Matters on the PSI Exam

On the national (general) PSI real estate salesperson and broker candidate exams, the Laws of Agency content area is among the highest-weighted. Agency produces some of the most common questions on the PSI national real estate exam, and that’s based on exam prep instructors’ reviews of the actual PSI content breakdown. Missing these questions can seriously hurt your score, so nailing this section gives you a major edge.

Here’s what the PSI exam tests you on under Laws of Agency:

• What agency is and how it’s defined
• Agency and non-agency relationships
• How agency is created (agency agreements)
• Duties of an agent to the principal and to third parties
• Disclosure requirements
• How agency (legal relationship) is terminated

Let’s walk through each of these one by one.

What Is Agency? The Core Definition

Agency is a legal relationship in which one person (the agent) is authorized to act on behalf of another person (the principal) when dealing with a third party. In real estate, the agent is usually a licensee (that’s you, the salesperson), and the principal is your client — either a buyer or a seller.

This relationship creates legal duties and responsibilities that go far beyond just showing houses or writing contracts. When you become someone’s agent, you take on a serious legal obligation to act in their best interest.

💡 PSI Exam Tip: On the exam, always remember that the agent works for the principal, not for themselves. Any time a question asks whose interest the agent must protect, the answer is almost always the principal (your client).

Types of Agency Relationships

Not all agency relationships are the same. The PSI exam will test you on the specific types, so you need to know each one cold.

Seller’s Agency

A seller’s agent (also called a listing agent) represents the seller. Their job is to get the best possible price and terms for the seller. Everything they do should be in the seller’s best interest.

Buyer’s Agency

A buyer’s agent represents the buyer. This became more formally defined and regulated in recent years. The buyer’s agent works to get the best price and terms for the buyer.

Dual Agency

Dual agency occurs when the same agent or brokerage represents both the buyer and seller in the same transaction. This is a major conflict of interest that regulators closely monitor, and that is outright illegal in some states.

💡 PSI Exam Tip: When you see a dual/designated agency question, think conflict of interest. The key issue is whether proper disclosure was made and whether all parties consented in writing.

Dual/Designated Agency

In dual/designated agency, a broker assigns specific agents within their office to represent each party (one agent for the buyer, a different agent for the seller). This avoids the full conflict of dual agency while still allowing the brokerage to represent both sides.

Non-Agency (Transaction Broker)

A transaction broker (or facilitator) does NOT represent either party as an agent. They simply help the transaction along without owing full fiduciary duties to either side. The PSI exam specifically tests the difference between agency and non-agency relationships.

PSI Outline – Laws of Agency Subtopics at a Glance

The table below maps the key PSI exam subtopics for Laws of Agency, what each one tests, and how often it’s likely to show up:

How Agency Is Created

Agency doesn’t just happen because you say you’re someone’s agent. It has to be created in one of a few specific ways.

Express Agency

This is the most common and most straightforward form. It’s created by a written or verbal agreement, for example, when a seller signs a listing agreement with a broker, express agency is formed. Most states require written agreements.

Implied Agency

Sometimes agency is created by the parties’ actions, even without a formal agreement. For example, if you start showing a buyer homes, writing offers, and advising them on price without a signed buyer-broker agreement, you may have accidentally created an implied agency.

💡 PSI Exam Tip: Implied agency is a common trick question on the PSI exam. Just because there’s no written agreement doesn’t mean agency doesn’t exist; actions can create it.

Apparent Authority (Ostensible Agency)

This scenario happens when a principal (such as a broker) allows someone to appear to be their agent, even if no formal agency has been created. A third party who reasonably relies on that appearance can hold the principal responsible.

Agency by Ratification

If an agent acts on behalf of someone without authorization, but that person later approves the action after the fact, agency by ratification has occurred.

The Fiduciary Duties — OLDCAR and COLD/AC

This is arguably the most tested concept in the entire Laws of Agency section. When you represent a client as their agent, you owe them fiduciary duties. A helpful acronym to remember them all is OLD CAR (or some textbooks use COALD):

💡 PSI Exam Tip: The PSI exam loves to test whether an agent violated one of these duties. Read each scenario question carefully and ask yourself: “Which duty is being described or broken?

Agency Disclosure | When and How

Agency disclosure is one of the most important legal protections in real estate. Agents are required by law to disclose the nature of their agency relationship to all parties involved in a transaction.^[3]

When Must Disclosure Happen?

In most states, disclosure must occur:

• At the first substantive contact with a potential client or customer
• Before any confidential information is shared
• Before an offer is made or accepted

What Must Be Disclosed?

• Who the agent represents (buyer, seller, or both)
• Whether dual agency exists
• Whether the licensee has any personal interest in the transaction

💡 PSI Exam Tip: If a question states that an agent failed to disclose their representation status, the answer will almost always indicate a violation of agency law, which may result in license suspension or revocation.

How Agency Is Terminated

Just like a job, the agency relationship doesn’t last forever. The PSI exam tests several ways that an agency can come to an end.

Here are the most common termination methods:

1. Completion of the purpose: the transaction closes, and the agency is done
2. Expiration of the listing period: the agreed-upon time runs out
3. Mutual agreement: both parties agree to end the relationship
4. Revocation by the principal: the client fires the agent (note: the client may still owe a fee)
5. Renunciation by the agent: the agent quits (note: this could be a breach of contract)
6. Death or incapacity: if either party dies or becomes legally incompetent, the agency ends
7. Destruction of the property: if the subject property is destroyed, the agency typically ends
8. Bankruptcy: In some cases, the bankruptcy of either party can terminate the agency

💡 PSI Exam Tip: The holdover clause (also called the broker protection clause) is frequently tested. This clause states that even after a listing expires, if the broker introduced the buyer to the property during the listing period, the seller may still owe the broker a commission if a sale occurs within a specified period.

Commission and Procuring Cause

Real estate agents work largely on commission — they get paid when a deal closes. But the PSI exam goes beyond just how much commission is earned. You’ll be tested on when it’s earned and who earns it.

When Is a Commission Earned?

A broker typically earns their commission when they have:

1. Procured a ready, willing, and able buyer: meaning the buyer wants the property and can pay for it
2. The buyer and seller reach an agreement on price and terms

This is referred to as being the procuring cause of the sale. The agent who was the primary cause of bringing the buyer and seller together is the procuring cause and is entitled to the commission.

💡 PSI Exam Tip: Commission amounts are always negotiable between the broker and the client. There is no “standard” commission rate set by law. Any question that suggests a fixed, required commission rate is testing whether you know this!

Agent Duties to Third Parties (Non-Clients)

You have extra-strong duties to your client, but what about the other side of the deal?

Even when you don’t represent someone, you still owe them basic honesty. Specifically, agents must:

• Never misrepresent (lie about) the property or any material facts
• Disclose known material defects that could affect the value or desirability of the property
• Treat all parties with honesty and fairness

The difference is that non-clients don’t get the full fiduciary protection — they just get basic honesty and fair dealing.

💡 PSI Exam Tip: Watch out for the phrase “material fact.” A material fact is any fact that could change a buyer’s decision to buy, or change the price they’d offer. Agents must disclose material facts, even to non-clients!

Top PSI Exam Tips for Laws of Agency

Now that you’ve walked through the entire Laws of Agency section, let’s talk strategy.

Here are proven test-taking tips specific to the agency questions you’ll face on the PSI exam:

General PSI Test-Taking Strategies

1. Read every question at least twice. Agency questions are full of tricky wording, such as “except,” “not,” and “only.” Missing one word can flip the entire meaning of a question.
2. Answer every single question — even if you’re guessing. A blank answer is always a guess; a guess gives you at least a 25% chance.
3. Don’t add information that isn’t in the question. If a question only mentions a seller’s agent, don’t assume dual agency exists.
4. Use the process of elimination. Even ruling out one wrong answer improves your odds significantly.
5. Go through the exam at least twice. On your first pass (45 minutes or less), answer what you know and flag what you don’t. Then go back.
6. Never answer from field experience. The PSI exam is a book test, not a field test. Answer based on what your textbook says, not what you’ve seen done in real life.

Agency-Specific Tips

• Memorize OLD CAR or COLD/AC. You will see fiduciary duty questions, guaranteed. (care, obedience, loyalty, disclosure, accounting, confidentiality)
• Know the difference between clients and customers. Clients get fiduciary duties. Customers just get honest dealings.
• Dual agency = always disclosure + written consent. If consent isn’t mentioned, it’s a problem.
• The holdover clause protects the broker after listing expiration — know when it applies.
• Implied agency is sneaky; know that actions, not just paperwork, can create agency.

Quick Reference — Agency Relationships Side by Side

Use this table to quickly compare the different types of agency relationships you’ll be tested on:

Wrapping It All Up

The Laws of Agency section is one of the most rewarding parts of your real estate education to master because it directly reflects what you’ll do every single day as a licensed agent. Understanding agency means understanding your legal role, your responsibilities, and the ethical backbone of the entire profession.

Here’s your final study checklist before exam day:

• ✅ Know the definition and types of agency relationships
• ✅ Be able to explain how agency is created (express, implied, apparent, ratification)
• ✅ Memorize OLD CAR or COLD/AC fiduciary duties (care, obedience, loyalty, disclosure, accounting, and confidentiality)
• ✅ Understand disclosure requirements, who, when, and how
• ✅ Know how agency (legal relationship) is terminated (including the holdover clause)
• ✅ Understand what non-clients are owed (honesty, not full fiduciary protection)
• ✅ Know procuring cause and when commission is earned
• ✅ Understand dual agency, designated agency, and non-agency roles

Good luck on your PSI exam! You’ve got this. Study smart, read carefully, and remember, in agency law, it always comes back to one simple question: whose interests are you serving?