Arguments for the use of marginal costing

This is a costing technique in which only variable manufacturing costs are considered and used in valuing inventories and also in determining the cost of goods sold i.e. only variable production cost are considered as products cost and are allocated to the products manufactured. These costs include; direct material, direct labour, direct expenses and variable manufacturing overheads.

Arguments for the use of marginal costing

  1. It is simple to operate
  2. No arbitrary apportionment of fixed cost to products or departments
  3. Where sales are constant, but production fluctuates, marginal costing shows a constant profit whereas absorption costing shows varying profits
  4. Under or over absorption of overheads is almost entirely avoided
  5. Fixed costs are incurred on a time basis e.g. salaries, rent, rates etc, and do not relate to activity. Therefore it’s logical to write them off in the period they are incurred and this is done using marginal costing
  6. Accounts prepared using marginal costing more nearly approach the actual cash flow position

 

Arguments for the use of absorption costing

  • Where production is constant but sales fluctuate, net profit fluctuations are less with absorption costing than with marginal costing
  • Where the nature of the business is such that stock of finished goods is likely to build, the inclusion of fixed costs in stock valuation is desirable as it is done in absorption costing. Otherwise a series of fictitious loses will be reported in the earlier periods to be offset eventually excessive profits in the subsequent periods when the goods are sold.
  • Fixed costs constitute a substantial proportion of costs in many manufacturing concerns in modern industries. Production cannot be achieved without incurring the fixed production costs. It then becomes an inescapable part of the production cost, so should be included in stock valuation as is done in the absorption costing.
  • The calculation of marginal costs and the concentration upon contribution may lead to the firm setting selling prices which are below total cost although producing some positive contribution. Absorption costing makes this less likely because it includes fixed production overheads in product cost.
Arguments for the use of absorption costing
Arguments for the use of absorption costing
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