Nowadays, customer satisfaction has become an increasingly important factor in nonfinancial statement. Many companies try to use various means to investigate this information and connect it with measurements in financial statement. What is the exactly impact that customer satisfaction have on companies' financial situations? Researchers has given various answers regarding questions, proving the importance of customer satisfaction for companies' future performance. However, the impacts of customer satisfaction tend to vary greatly for different types of companies. Some research had focused on how customer satisfaction impact certain industry's future financial performance, but the difference between exact impact on the revenue between product companies and service companies is rarely studied. This paper discuss how customer satisfaction impact the revenues of product companies and service companies by comparing different research results and papers together to help product companies and service companies predict their future revenue.