Work life balance is considered to be a crucial factor in relation to employee performance. The objective of this study is to review theoretical literature on work life balance as it affect modern work organization. The research work sought to explore extensively whether these is relationship between work flexibility and quality of output, employer/employee relationship and increased productivity, working environment and the rate of turnover and lastly job security and employee retention. Therefore the study indicated that work flexibility, employer/employee relationship, working environment and job security have a positive effect on improved quality of output, increased productivity, rate of turnover among employees, employee retention. The findings showed that: employees react negatively when they experience work life imbalance and that management should adopt work life balance initiatives to improve employee performance. From the research findings, it has been concluded that work life balance is of significant essence to modern work organizations.