This study aims to determine the effect of service quality, promotion on the decision to purchase credit for devotion (kgb) by pnsdki and its impact on the loyalty of pnsdki customers in rawamangun branches. This study uses a quantitative method and the sample is 189. The customers are civil servants credit for the service of Rawamangun branch. by using the convenience sampling method and the data obtained were analyzed using the SEM-LISREL application.The results of this study indicate that the t test has a significant effect between service quality on purchasing decisions, promotions on purchasing decisions, purchasing decisions on customer loyalty, service quality on customer loyalty, promotions on customer loyalty

Keywords : Service Quality, Promotion, Purchasing Decisions, Customer Loyalty.