How to use a real estate agent commission calculator to estimate your costs Understanding Real Estate Agent Commission What is a realty agent commission? A real estate agent’s commission is a fee paid to an agent for facilitating a property transaction. This commission is a percentage based on the final sale of the property. In the realty industry, it is common for agents to be paid a commission in exchange for helping buyers and seller navigate the complexities that come with buying and selling a home. Real estate agent commission calculators are tools that help individuals estimate how much commission