Absorption costing is the fixing of the price of a product to include both the direct costs of production and a part of the overhead costs which are absorbed as well. Absorption costing follows three stages: allocation of actual overhead costs directly to the cost centre to which they relate; apportionment, by which common overhead costs are divided between various cost centres in proportion to the estimated benefit to each cost centre; absorption, by which the total costs are charged to each unit of production.