by The process of accumulation and calculation in costing refers to systematically collecting and determining the total cost incurred for a particular product, job, batch, process, or service. Costs are collected under suitable heads such as direct materials, direct labour, direct expenses, and overheads. After accumulation, these costs are calculated and assigned to the relevant cost unit. This process helps determine the actual cost of production and supports pricing, cost control, profitability analysis, and managerial decision making. The method of accumulation and calculation depends on the nature of production and the costing system used by the organisation.
1. Identification of Cost
First, all costs related to production are identified. Costs are classified as direct or indirect and recorded under appropriate cost heads. This ensures that every expenditure connected with production is properly captured.
2. Collection of Direct Costs
Direct material, direct labour, and direct expenses are collected and charged directly to the relevant job, batch, product, or process. Source documents such as material requisitions and labour time records support this calculation.
3. Collection of Overheads
Indirect costs such as factory rent, supervision, power, depreciation, and maintenance are accumulated separately. These costs are later allocated or absorbed using an appropriate overhead rate.
4. Calculation of Total Cost
After accumulating all relevant costs, total cost is calculated by adding direct costs and allocated overheads.
Formula:
Total Cost = Direct Material + Direct Labour + Direct Expenses + Overheads
5. Calculation of Cost per Unit
The total cost is divided by the number of units produced to determine the cost per unit.
Formula:
Cost per Unit = Total Cost ÷ Units Produced
