Variable costing method will enable your firm to calculate the contribution margin, analyse the effect of change in sales volume on the contribution margin and will help the firm in taking important cost, volume and pricing decisions. Due to these reasons, it is said that variable costing is a suitable method for internal reporting and management decision making purposes. During the initial years the fixed cost element of the firm will be high. Under the variable costing method, the entire fixed cost will be expensed during the year, due to which the profitability reflected by the financial statements will be low or they may even reflect a loss. As compared to this, if the absorption costing method is used the element of fixed cost related to the ending inventory will be capitalized due to which the profit will be comparatively higher. Thus, the absorption costing method is more suitable for external reporting purposes. Lower profit margins or booking losses in the initial years may have a demotivating effect on the investors of the firm and can also thereby hinder the borrowing capacity of the firm. Most importantly the absorption costing method is an accepted method under US GAAP, whereas the variable costing method is not allowed for external reporting purposes.