This paper investigates the complex issue of mutual influence between the application of bank management principles and personal finance by correlating the consumer’s confidence indicator (measured by using personal financial data from Eurostat surveys) and the level of bank activity in Croatia (levels of loans and deposits of the Croatian bank sector). The results of the analysis lead to the conclusion that there is a weak positive correlation between personal finance survey data and monthly bank activity indexes while there is an extreamly strong positive correlation between personal finance survey data and yearly bank activity indexes.