1) The document summarizes a research study on the effects of perceived service quality, customer trust, and customer satisfaction on customer loyalty, using PT. Jamsostek (Persero) Jakarta as a case study. 2) The study aimed to analyze the relationships between perceived service quality and customer satisfaction, perceived service quality and customer loyalty, perceived service quality and customer trust, customer satisfaction and customer loyalty, and customer trust and customer loyalty. 3) Data was collected through questionnaires measuring variables from an instrument by Darsono (2008) on a Likert scale, and analyzed using Structural Equation Modeling (SEM) to conclude that perceived service quality, customer trust, and customer satisfaction directly