ABSTRACT
This chapter presents different financial behaviours in the context of their rationality. Financial behaviours are types of individual behaviour and their particularity consists in applying to a specific object – money and incidents related to it. Planning process relates to how predictable specific financial behaviour is and if it is possible to take preliminary activities to prepare for certain behaviour. The chapter suggests that lack of perfect rationality is one of the reasons of financial exclusion and has a negative impact on the financialization process. Rationality is a key concept related to individual behaviour in the economic meaning. In the theory of economy different types of rationality are described. In conditions of perfect rationality, calculation is rigorous, whereas in conditions of selective rationality calculation is only approximate and, in fact, it is used in the majority of cases. Methodological rationality takes place when the choice of constituents to achieve the goal is a result of the decision maker's knowledge.
