Previous research rarely examined the antecedents of employee wellbeing with the interactive effect of abusive supervision and mediating impact of psychological contract breach especially in the developing country context. Drawing upon the social exchange theory, this study attempts to bridge a research gap by investigating work engagement, work-life balance, and turnover intention with employee well-being directly and through the moderating and mediation effects of abusive supervision and psychological contract breach. To validate these relationships, 208 employees who are working in banks of Pakistan were investigated, through a survey-based questionnaire. The Smart PLS 3.0 was employed to measure the association and test the hypotheses in which structural equation modelling played a role in checking the relationships among variables. The results demonstrate that work engagement, work-life balance, and turnover intention directly affect employee well-being. This study also found that psychological contract breach has a partial mediation effect between work engagement, work-life balance, turnover intention, and abusive supervision with employee well-being. Additionally, Saba Gulzar ABOUT THE AUTHORS Saba Gulzar is a Senior Lecturer at the Institute of Business Management (IoBM), Pakistan. She has more than 13 years of teaching. Experience her main focus: employee wellbeing, psychological contract, employee competencies and abusive supervision. She is a reviewer for few research journals. She is also a PhD Scholar.Nadia Ayub is an Associate Dean at College of Economics & Social Development, Institute of Business Management (IoBM), Pakistan. She has more than 15 years teaching experience. Her area of research, includes psychometrics, organizational behavior, and positive psychology.