Accounting’s ABC was first formalized in 1494 by Luca Pacioli. The fifteenth century was also the moment that noticed cost accounting premises. It goes without saying that ever since the economic development brought the development of cost methods. Thus, the end of the twentieth century witnessed the denial of absorption costing and the birth of activity-based costing. Cost accounting’s ABC is not only a new cost system, it is a new way of considering a company, of measuring and evaluating its performance.