A real estate broker is a term in the United States and Canada which describes a party who acts as an intermediary between sellers and buyers of real estate (or real property as it is known elsewhere) and attempts to find sellers who wish to sell and buyers who wish to buy. In the United States, the relationship was originally established by reference to the English common law of agency with the broker having a fiduciary relationship with his clients.

Estate agent is the term used in the United Kingdom to describe a person or organization whose business is to market real estate on behalf of clients, but there are significant differences between the actions and liabilities of brokers and estate agents in each country. Beyond the US, other countries take markedly different approaches to the marketing and selling of real property.

In the US, real estate brokers and their salespersons (commonly called "real estate agents" or, in some states, "brokers") assist sellers in marketing their property and selling it for the highest possible price under the best terms. When acting as a Buyer's agent with a signed agreement (or, in many cases, verbal agreement, although a broker may not be legally entitled to his commission unless the agreement is in writing), they assist buyers by helping them purchase property for the lowest possible price under the best terms. Without a signed agreement, brokers may assist buyers in the acquisition of property but still represent the seller and the seller's interests.

In most jurisdictions in the United States, a person is required to have a license in order to receive remuneration for services rendered as a real estate broker. Unlicensed activity is illegal, but buyers and sellers acting as principals in the sale or purchase of real estate are not required to be licensed. In some states, lawyers are allowed to handle real estate sales for compensation without being licensed as brokers or agents.

The difference between salespersons and brokers

In the past, when brokers (and their agents) only represented sellers, the term ‘’real estate salesperson’’ may have been more appropriate than it is today, given the different ways that brokers and their agents can help a buyer through the process rather than simply “sell’’ him or her a property. Legally however, the term 'salesperson' is still used in many states to describe a real estate agent.

Real estate education: In order to become licensed, most states require that an applicant take a minimum number of classes before taking the state licensing exam. Such education is often provided by real estate brokerages as a means to finding new agents.

Today in many states, the real estate agent (acting as an agent of the broker with whom he/she is employed) is required to disclose to prospective buyers and sellers who represents whom. See below for a broker/agent’s relationship to sellers and their relationship to buyers.

While some people may refer to any licensed real estate agent as a real estate broker, a licensed real estate agent is a professional who has obtained either a real estate salesperson's license or a real estate broker's license.

In the United States, there are commonly two levels of real estate professionals licensed by the individual states, but not by the federal government:

Real estate salesperson (or, in some states, Real estate broker)

When a person first becomes licensed to become a real estate agent, he/she obtains a real estate salesperson's license (or some states use the alternative term, "broker") from the state in which he/she will practice. If you want to obtain a real estate license, the candidate must take specific coursework (of between 40 and 90 hours) and then pass a state exam on real estate law and practice. In order to work, salespersons must then be associated with (and act under the authority of) a real estate broker.

Many states also have reciprocal agreements with other states, allowing a licensed individual from a qualified state to take the second state's exam without completing the course requirements, or, in some cases, take only a state law exam.

Real estate broker (or, in some states, qualifying broker)

After gaining some years of experience in real estate sales, a salesperson may decide to become licensed as a real estate broker (or Principal/qualifying broker) in order to own, manage or operate his/her own brokerage. In addition, some states allow college graduates to apply for a broker license without years of experience. College graduates fall into this category once they have completed the state required courses as well. Commonly more course work and a broker's state exam on real estate law must be passed. Upon obtaining a broker's license, a real estate agent may continue to work for another broker in a similar capacity as before (often referred to as a broker associate or associate broker) or take charge of his/her own brokerage and hire other salespersons (or broker) licensees. Becoming a branch office manager may or may not require a broker's license. Some states such as New York allow licensed attorneys to become real estate brokers without taking any exam. In some states, such as Colorado, there are no "salespeople", as all licensees are brokers.

A Realtor is a real estate salesperson or broker who is a member of the National Association of Realtors (NAR). All Realtors are brokers/salespersons, but not all brokers/salespersons are Realtors. There are 1.3 million Realtors in the US and an additional 1 million licensed real estate agents who are not members of NAR.

Services provided to buyers:

• Buyers as clients

With the increase in the practice of buyer brokerage in the US, especially since the late 1990s in most states, agents (acting under their brokers) have been able to represent buyers in the transaction with a written "Buyer Agency Agreement" not unlike the "Listing Agreement" for sellers referred to above. In this case, buyers are clients of the brokerage.

Some brokerages represent buyers only and are known as Exclusive Buyer Agents (EBAs). Consumer Reports states "You can find a true buyer's agent only at a firm that does not accept listings" The advantages of using an Exclusive Buyer Agent is that they avoid conflicts of interest by working in the best interests of the buyer and not the seller, avoid homes and neighborhoods likely to fare poorly in the marketplace, ensure the buyer does not unknowingly overpay for a property, fully informs the buyer of adverse conditions, encourages the buyer to make offers based on true value instead of list price which can sometimes be overstated, and works to save the buyer money. A buyer agency firm which commissioned a study found EBA purchased homes were seventeen times less likely to go into foreclosure.

A real estate brokerage attempts to do the following for the buyers of real estate only when they represent the buyers with some form of written buyer-brokerage agreement:

• Find real estate in accordance with the buyers needs, specifications, and cost.
• Takes buyers to and shows them properties available for sale.
• When deemed appropriate, pre-screens buyers to ensure they are financially qualified to buy the properties shown (or uses a mortgage professional to do that task).
• Negotiates price and terms on behalf of the buyers and prepares standard real estate purchase contract by filling in the blanks in the contract form. The buyer's agent acts as a fiduciary for the buyer.

Due to the importance of the role of representing buyers' interests, many brokers who seek to play the role of client advocate are now seeking out the services of Certified Mortgage Planners, industry experts that work in concert with Certified Financial Planners to align consumers' home finance positions with their larger financial portfolio's).

• Buyers as customers

In most states, until the 1990s, buyers who worked with an agent of a real estate broker in finding a house were customers of the brokerage, since the broker represented only sellers.

Today, state laws differ. Buyers and/or sellers may be represented. Typically, a written "Buyer Brokerage" agreement is required for the buyer to have representation (regardless of which party is paying the commission), although by his/her actions, an agent can create representation.

• Find real estate in accordance with the buyers’ needs, specifications, and affordability.
• Take buyers to and shows them properties available for sale.
• When deemed appropriate, prescreen buyers to ensure they are financially qualified to buy the properties shown (or uses a mortgage professional to do that task).
• Assist the buyer in making an offer for the property.