Aims: This study examines the influence of loyalty, task division, and work environment on the performance of employees at the Customs and Excise Supervision and Service Office (KPBC) Belawan. Study Design: A quantitative associative approach was employed to test causal relationships between the independent and dependent variables. Place and Duration of Study: The research was conducted at KPBC Belawan, Medan, North Sumatra, Indonesia, from January to March 2025. Methodology: From a population of 208 employees, 68 respondents were selected using Slovin’s formula and proportional random sampling. Data were collected through questionnaires, observation, and documentation, and analyzed using multiple linear regression in SPSS 24. Results: The analysis revealed that loyalty, task division, and work environment each had a significant positive impact, both individually and collectively, with an Adjusted R² of 0.507. Conclusion: The findings confirm that strengthening loyalty, ensuring fair distribution of tasks, and fostering a supportive work environment are crucial for improving organizational effectiveness. This study contributes to the literature by addressing limited empirical research on employee performance within Indonesia’s public sector customs institutions, highlighting managerial priorities to optimize human resource potential.
Ardyaningsih et al. (2025) studied this question.