Abstract: The banking sector in Sri Lanka is experiencing rapid high-tech advancements, which are forcing banks and financial institutions to adopt self-service technologies like internet banking, SMS banking, mobile banking, automated teller machines, cash deposit machines, etc. to provide convenient services and increase customer satisfaction. The purpose of the study is to investigate the effectiveness of mobile banking on customer satisfaction, in the context of XYZ Bank with specific reference to branch Thalawathugoda. The study used a convenience sampling technique to select 50 mobile banking users from a population of 1027 and then used an online survey to collect quantitative data.