The contemporary environment is witnessing rapid developments and increasing competition, which makes accurate and relevant accounting information a fundamental element in supporting management decisions and enhancing the competitiveness of organizations. Within this framework, advanced cost accounting holds a pivotal position as one of the main branches of accounting, as it is concerned with providing detailed data on the costs of products, activities, processes, and services. This assists management in planning, controlling, and evaluating performance efficiently. This book aims to deepen the reader’s understanding of the models, concepts, and advanced methods in cost accounting by addressing contemporary topics that reflect modern trends in this field. These include the Activity-Based Costing system, variance analysis, the Just-In-Time production system, the Economic Order Quantity, fixed and flexible budgeting, and standard costing. The book also focuses on linking theoretical aspects with practical applications, by providing examples, applied exercises, and case studies that help students grasp concepts and transform them into actionable practical tools