In today's business world, employee retention is one of the much-debated topics and identifying the reasons for employee turnover and implementing the necessary policies to retain employees can be crucial. Thus, all organizations expect to minimize the employee turnover to the best possible level. Therefore, the intention of this research is to study the impact of Human Resource practices on employee retention, conducted on the Business Process Outsourcing (BPO) sector in Sri Lanka. This study is significant as such research projects have been sparse in the Sri Lankan context and in order to fill that gap this research have been conducted for three companies namely Company A, B and C. The analysis was mainly based on 237 executive level employees from Company A, B and C . According to the results, obtain through regression analysis all three companies indicated that there is less impact of HR practices on employee retention. As a conclusion when management of BPO sector formulateformulate the policies in their organizations with regard to employee retention.