Nowadays, financial literacy is an integral part of education in many countries because of its
positive influence on financial inclusion, and financial well-being of households is supposed. In this study,
attention is focused on finding out which components of financial literacy (knowledge, behaviour, and attitude)
determine the financial well-being of individuals to a greater extent, as well as the link between subjective
and objective financial well-being and financial literacy. The Global Findex Database of the World Bank
correlation and regression analysis was used inline with the principal components method to process data
samples for Ukraine, Georgia, Czechia, Hungary, Croatia, Poland, Austria, Lithuania, and Estonia from
OECD/INFE. Cross-country differences indicate that the more economically developed a country is, the
higher its financial literacy level can be observed. Also, countries with lower financial literacy levels have
more significant growth potential, with Poland and Ukraine as examples. The contribution of knowledge,
behaviour, and attitude, in general, can be considered as uniform in terms of financial literacy index formation
that corresponds to the index logic. It should be noted that in economically developed countries higher
correlation dependency between financial literacy and knowledge and attitudes can be spotted than
behaviour. At the same time, behaviour determines households` financial well-being level. It was detected
that subjective financial well-being and financial literacy level equally, by approximately 63%, are driven by
savings and sound budgeting. The wartime experience of Ukraine shows that depositors' behaviour can be
quite different and depending on a set of factors, such as banking system development level, level of trust in
the banking system, and financial literacy level
