Performance management in firms became challenges for business owners and management. Most of best practices were found to be unsustainable. Even though, the right persons were hired on the job, their willingness in performing still cannot be controlled because each person had different driving factors in performing well. Therefore, the purpose of this research was to explore factors that lead to poor performance of employees in a hotel in Bangkok. The research used qualitative approach to address questions. Sixteen participants were in-depth interviewed to explore beneath the surface of the response in order to investigate reasons behind their poor performance. The results of content analysis indicated that personality differences of colleagues were the first factor contributing to poor performance of hotel employees. Manager’s unfairness, client complaints, workload, lack of feedback also affected the employees’ performance. Practical implications, limitations of the study, and suggestions for future research are also discussed.