In consideration of the brokerage successfully finding a satisfactory buyer for the property, a broker anticipates receiving a commission for the services the brokerage has provided. Usually, the payment of a commission to the brokerage is contingent upon finding a satisfactory buyer for the real estate for sale, the successful negotiation of a purchase contract between a satisfactory buyer and seller, or the settlement of the transaction and the exchange of money between buyer and seller.
However, some brokers charge as much as 10% while others will offer services for 1%. Fee-for-service or flat-fee real estate brokerages are also increasing in popularity. This is not, however, the norm throughout the world. In Australia, for example, listing agents are paid 1% and very few buyers use an agent. If they do, they pay out-of-pocket.
In North America a commission in the 5% to 7% range is considered "standard" for residential real estate and is typically paid by the seller at the closing of the transaction. Commissions are negotiable between seller and broker. The commission could also be paid as flat fee or some combination of flat fee and percentage, particularly in the case of lower-priced properties, vacant lots, or other unusual real estate. The details are determined by the listing contract.
Out of the commission received from the seller, the broker will typically pay any expenses incurred to do the work of trying to sell the listed properties, such as advertisements, etc.

Real estate commissions are becoming a point of controversy. Home values in many areas have quadrupled over the past 20 years. This may be contributing to the increased number of licensed agents and growing competition between them. The number of real estate agents in areas tends to rise when home values do, and the productivity of existing agents goes down. The rewards have increased, but so have the demands of clients and business risks faced by agents. In North America, agents have had to become familiar with marketing through the internet as well as traditional print and other media. Additionally the law is complicated with issues such as defects in housing, grow houses and other issues of which the agent is the front line defence for his client. There is more liablity than ever in advising buyers and sellers.
Another controversy exists for the commissions to real estate agents. If a listing agent sells a property for any amount above the listed price, he in turn will make additional income. In theory, this will motivate him/her to get top dollar price for his client, the seller. However, if the agent representing the buyer attempts to obtain a lower sales price for his client, then he/she would make a lower commission. Thus, it could be considered to be in the agent's best interest to advise his client to purchase the property at a higher price.
In practical terms, there is rarely a great enough difference between the listing (asking) price and the negotiated selling price to make a significant difference between the commissions generated on each side, and certainly hardly enough to justify an agent failing in his fiduciary duty to obtain the best terms for his/her client.