Behavioral Aspects in Cost Accumulation and Cost Control: An Analytical Essay By: Oktorion Pangeran Al Sadri A b s tr a c t This essay analyzes the behavioral aspects of cost accumulation and cost control, highlighting how human factors influence the effectiveness of cost systems in organizations. The discussion covers cost classification, the importance of strategic cost management, and a comparison between traditional costing systems and modern costing systems such as Activity-Based Costing (ABC) and Time-Driven Activity-Based Costing (TDABC). Furthermore, the essay examines cost behavior, the use of variable costing in decision-making, and the behavioral implications for cost control and performance reporting. By integrating technical and behavioral perspectives, the essay demonstrates that successful cost management depends heavily on the accuracy of cost information as well as on motivation, participation, and perceptions of fairness within the organization. These findings underscore the importance of a holistic approach to achieving efficiency and competitiveness in a company. Keywords: Behavioral Accounting; Cost Control; Activity-Based Costing; Variable Costing; Decision Making. I n t ro d u c t i o n In todays increasingly competitive business environment, organizations must manage costs efficiently while maintaining product quality and operational sustainability. Research in management accounting shows that cost