This paper defines the concept of financial literacy and presents a survey conducted among fourth-grade high school students in the City of Rijeka. The research explains the importance of financial literacy and its subcategories related to financial education and retirement literacy. In addition, the National Strategic Framework for Improving Consumer Financial Literacy is summarised. The research results conducted among fourth-grade high school students in the City of Rijeka are compared with the research results achieved in the Republic of Croatia. The empirical part of the data collected by the survey was statistically processed and analysed using software packages for statistical analysis of SPSS data, using the Shapiro-Wilk test to check the normality of collected data. Defined hypotheses were tested using the Mann-Whitney U test for gender impact on financial literacy. HI quadrat test and Fisher test examine the differences concerning the components of the impact on financial behaviour and Kruskal Wallis test to examine the impact of parental education on the financial literacy of high school students from the analysed sample. Based on the results obtained, it is concluded that there is a significant difference between high school male and high school female students in knowledge, attitudes and beliefs, as well in the original learning about money management.