Variable costing, also known as marginal costing, is an accounting method in which only variable costs are included in product costs. Fixed manufacturing overhead is treated as a period cost and is expensed in the period incurred.
Types
- Direct Costs: Costs that can be directly attributed to the production of a specific good.
- Indirect Costs: Costs that are not directly linked to production.
- Variable Costs: Costs that vary with the level of production output.
- Fixed Costs: Costs that remain constant regardless of production levels.
Detailed Explanation
Variable costing involves the following key steps:
- Identification of Variable Costs: Costs that change with the level of output such as raw materials and direct labor.
- Allocation to Products: Assigning variable costs directly to units produced.
- Exclusion of Fixed Overhead: Treating fixed manufacturing overhead as period expenses, not product costs.
Mathematical Model
$$
\text{Variable Cost per Unit} = \frac{\text{Total Variable Costs}}{\text{Total Units Produced}}
$$
$$
\text{Total Cost} = (\text{Variable Cost per Unit} \times \text{Units Produced}) + \text{Fixed Costs}
$$
Importance
- Managerial Decision-Making: Provides clear insights into the impact of production volume on costs and profits.
- Cost Control: Helps in identifying variable costs that can be controlled or reduced.
- Pricing Strategies: Assists in setting competitive prices by understanding marginal costs.
Applicability
- Manufacturing Industries: Where variable costs make up a significant portion of total costs.
- Service Industries: To understand cost behavior with changes in service volume.
- Absorption Costing: A costing method where both variable and fixed manufacturing costs are allocated to products.
- Contribution Margin: The selling price per unit minus the variable cost per unit.
FAQs
What is variable costing?
Variable costing is an accounting method where only variable costs are included in product costs, and fixed overhead is treated as a period cost.
Why is variable costing important?
It aids in managerial decision-making by providing clear insights into how production volume affects profitability.
How does variable costing differ from absorption costing?
Variable costing includes only variable costs in product costs, while absorption costing includes both variable and fixed costs.