Internal accounting discipline used to measure, assign, and analyze costs for control, pricing, and decision support.
Cost accounting is the internal accounting discipline used to measure, assign, and analyze costs so managers can price work, control spending, and make operating decisions. It focuses on what products, services, departments, or processes actually cost.
Without cost accounting, managers can struggle to understand product profitability, process efficiency, and cost behavior. Good cost information supports budgeting, pricing, planning, and performance review.
Cost accounting collects direct costs and assigns indirect costs using methods that fit the business. Depending on the environment, it may rely on job order costing, process costing, standard costing, or other approaches. The output is used internally, even though some of the costs also feed inventory valuation and cost of goods sold for financial reporting.
A manufacturer may use cost accounting to determine that Product A consumes more machine time and overhead than Product B, even if both use similar materials. That cost insight can change pricing or production decisions.
Cost accounting is not identical to financial accounting. Financial accounting is designed for external reporting. Cost accounting is built mainly for internal control and decision support, even though the two systems interact.