Employees have an important role in a company. However, the demands of production targets to maintain customer satisfaction create an increased workload at any given time, causing stress on employees to meet production quality and quantity. This research paper aimed to determine the effects of psychological stress, physiological stress, and behavioral stress on employee performance at PT Pungkook Indonesia One. The sample used in this quantitative research was 70 employees. A questionnaire was used to collect the data. The questionnaire consisted of 20 closed-ended questions. The data analysis method in this study used instrument testing, prerequisite testing, and statistical testing. The instrument test used validity and reliability tests, the data prerequisite tests used normality tests, and the statistical tests used multiple regression equations and coefficient of determination tests. The results showed that psychological stress and behavioral stress had positive and significant influences on employee performance. In contrast, another result also showed that physiological stress had a negative and significant influence on employee performance. Based on the results of this research, it can be concluded that when employees experience psychological and behavioral stress, they may feel more compelled to work harder to overcome the stress, thereby increasing their productivity and performance. On the other hand, when employees feel physically burdened, they may have difficulty in performing tasks and maintaining their focus, which can reduce their productivity and performance
