This work aims to provide an insight of the sources and level of work stress present in the business organizations operating in Lahore, a metropolitan city of Pakistan. Differences among demographic groups in work stress experiences are also investigated. Individuals from management positions participated in this study. Data is collected from private sector organizations by using survey method. Six factors namely role ambiguity, role conflict, quantitative role overload, qualitative role overload, career development, and responsibility for others as identified by literature as potential sources of work stress are taken for this study. Gender, age, experience, and education are taken as demographic variables to identify the differences among individuals in level and sources of works stress. All the variables in instrument score high on reliability tests. Results reveal that 87% of the employees have experienced moderate to high level of work stress because of the mentioned stressors. In general, all the factors used in this study cause employees above average level of work stress.