The article is aimed at defining the essence of financial security of the banking system (FSBS) and carrying out a comprehensive evaluation of its current status. The article examines and systematizes the publications of scholars on the definition of «financial security of the bank». To examine the status of the FSBS, the indicators of resource-forming, credit, investment activities of banks and the dynamics of their income and expenses are analyzed. In the course of analysis, it was found out that the indicators of the resource-forming and investment components of the banking sector of Ukraine have positive dynamics and do not pose threats to its financial security. The analysis of credit security indicators identified a significant threat to the financial security of the banking system – a significant proportion of non-performing loans. The dynamics of incomes and expenses of the banking sector has demonstrated that the banking system is gradually coming out of the crisis and has a positive financial result since 2018. To summarize the analysis, both the indices and the integral indicator of the FSBS were computed in accordance with the methodological recommendations of the Ministry of Economic Development and Trade of Ukraine, the results of computing led to conclusion that the financial security of the banking system of Ukraine is at a dangerous level. Prospects for further research are condition due to the low level of financial security of the banking system of Ukraine and the need to develop a set of measures aimed at improving the overall level of financial security of the banking system.