7.3 Arguments for the use of marginal costing

Arguments for the use of marginal and costing

Here are some arguments for the use of marginal costing and absorption costing:

Marginal Costing:

Helps in decision-making: Marginal costing is useful in short-term decision-making, such as pricing decisions, make or buy decisions, and product mix decisions. The contribution margin can be used to determine the profitability of different products and to identify which products should be emphasized or discontinued.
Easy to understand: Marginal costing is a simple and easy-to-understand method of cost accounting. It focuses on the behavior of costs and separates fixed and variable costs, making it easier for managers to understand and analyze costs.

Useful for break-even analysis: Marginal costing is helpful in break-even analysis, as it uses the concept of contribution margin to determine the break-even point, which is the level of sales at which a company covers its total costs.

Useful for short-term planning: Marginal costing is helpful for short-term planning, as it focuses on variable costs, which are more likely to change in the short term. It can help managers to make quick and informed decisions to respond to changes in market conditions.
Useful for pricing decisions: Marginal costing is helpful in determining the minimum price at which a product should be sold to cover its variable costs and contribute to the fixed costs. This can help managers to make pricing decisions and to stay competitive in the market.

Arguments against the use of marginal costing

Inaccurate Profit Calculation: Marginal costing does not take into account fixed overhead costs. As a result, it may provide an inaccurate picture of the profitability of a product or service. By excluding fixed costs, the contribution margin per unit may appear higher than it actually is, leading to misleading profit calculations.
Inadequate for Long-Term Decision Making: Marginal costing focuses primarily on short-term decision making and may not provide a comprehensive view of the long-term profitability of a product or project. Fixed costs play a significant role in long-term planning, and neglecting them can lead to flawed decisions regarding product pricing, capacity utilization, and investment appraisal.
Undermines Cost Control: Marginal costing does not emphasize cost control or cost reduction efforts. By excluding fixed costs, it can create a perception that reducing production volume will always result in cost savings. However, in reality, certain fixed costs are necessary for operations and cannot be easily eliminated. This may discourage managers from implementing cost-saving measures beyond volume reduction.
Distorted Inventory Valuation: Marginal costing does not allocate fixed overhead costs to inventory. As a result, the valuation of inventory based solely on variable costs may not accurately reflect its true value. This can lead to inconsistencies in financial reporting and can impact decision-making related to stock levels and pricing.
Ignoring Capacity Utilization: Marginal costing assumes that fixed costs remain constant within a certain production capacity. However, in reality, as production levels change, fixed costs may also vary. Ignoring capacity utilization can lead to suboptimal decisions regarding pricing, production levels, and resource allocation.
Limited Cost Behavior Analysis: Marginal costing assumes a linear relationship between costs and activity levels. It does not consider cost behavior patterns such as economies of scale, diseconomies of scale, or step costs. This limitation can hinder the understanding of cost dynamics and impact decision-making in scenarios where cost behavior is nonlinear.