1. Classifying Costs by Nature
To analyze costs effectively, accountants group expenses into three primary categories based on their physical or operational source:
- Material Costs: The cost of physical commodities used to create a product or deliver a service.
- Labor Costs: The compensation paid to human workers, including wages, salaries, bonuses, and payroll taxes.
- Expense Costs: All other business costs that are not materials or labor, such as utility bills, property rent, and equipment depreciation.
2. Classifying Costs by Traceability
- Direct Costs: Costs that can be traced entirely and economically to a specific product or service.
- Examples: Wood used to manufacture a table, or the hourly wages of the assembly line worker.
- Indirect Costs (Overheads): Costs that cannot be linked to a single product or service because they support multiple operations.
- Examples: Factory rent, supervisor salaries, and factory electricity.
3. The Cost Accumulation Equation
Grouping these classifications reveals the structural tiers of manufacturing costs:
Prime Cost = Direct Materials + Direct Labor + Direct Expenses
Total Production Cost = Prime Cost + Factory Production Overheads
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