In this paper, important implications were sought to keep the real estate brokerage market by analyzing the factors affect the total income of real estate business. In order to achieve the study goals, the related literature were reviewed and a survey was conducted with the real estate agents. The data such as currents trends of real estate market and sales amounts of real estate agencies were collected. Through the literature review, real estate related factors of the regions such as the price of the house, population, number of house holders were analyzed, and through the survey, the general trends of real estate market and the total sales amounts of the last year were analyzed. The factors that affect the real estate business were divided into regional and individual ones. According to the multi regression analysis, regional factors did not affect the sales of real estate agencies, and individual factors such as fixed capital, number of employees, realtor’s education level, experiences, and working hours affect the sales amount of the real agencies