Activity-Based Costing (ABC) is a managerial accounting method that assigns indirect costs to products, services, or customers based on the activities that drive those costs. It improves cost accuracy by identifying the actual consumption of resources rather than allocating overhead using broad averages or simplistic volume-based measures.
Formally, Activity-Based Costing can be defined as a costing system that traces overhead and indirect expenses to cost objects through activity cost drivers, reflecting the causal relationship between resource usage and operational activities.
ABC operates through a two-stage process: first, it identifies key activities within an organization (such as production setup, quality inspection, procurement, or order processing); second, it assigns costs to these activities and then allocates them to products or services based on their usage of each activity.
Cost drivers—such as machine hours, number of setups, or number of orders—are used to measure the intensity of activity consumption. This results in more precise product costing compared to traditional allocation methods.
In strategic management and operational decision-making, ABC helps identify inefficient processes, hidden cost drivers, and non-value-adding activities. It supports pricing decisions, product mix optimization, and cost reduction initiatives.
Thus, Activity-Based Costing is a refined cost allocation methodology that enhances cost transparency by linking overhead expenses directly to the activities that generate them, enabling more accurate financial and strategic decision-making.
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