Recent technological and organizational mutations, evolutions and the automation of the production processes generated the reduction of direct expenses and led to the increase of indirect ones. Therefore companies are facing a new challenge: they need to adapt their managerial accounting instruments and cost calculation methods to the new requirements of production. The couple ABC/ABM represents a complete instrument for management; while the first is a cost calculation system, the second relies on added value and represents a whole philosophy regarding the performance based management. After covering the available literature in this field, based on a qualitative analysis, we want to demonstrate that the reminded couple continues to gain field in the area of cost calculation and measuring performances, and tends to become an indispensable instrument for each manager by offering information regarding the profitability of one’s clients, administrating the portfolio of products and setting their prices.