The evolution of human society in all areas, and especially the economic field, required the banking offer to adapt to new requirements, which called for the modernization and the development of the services provided by the bank to its customers, but also becoming close to them. The goal we set with this article is to examine in terms of methodology the correlation between the number of active cards and the fees level with “PEARSON” coefficient. It is study the level of fees practiced by Raiffeisen Bank is/ is not greatly influenced (depend or doesn't depend) by the number of active cards, meaning there are other factors influencing the fees levels.