Although the Czech Republic usually spends a smaller share of GDP on health care compared to developed European countries, as shown by the results of expert studies and publicly available statistical data, in 2020 public spending on health care in the Czech Republic became the highest in the EU together with Austria. The aim of the paper is to assess the development of the financing of the Czech health system from public health insurance funds from 2010 to 2022. In assessing the development of financing, attention is paid to the revenues and expenditures of public health insurance companies in the Czech Republic and the factors that influence the level of revenues and expenditures of public health insurance companies. The paper concludes with a warning about the steady increase in the expenditure of public health insurers in the context of the prevailing deficit management, deepened by the impact of the Covid-19 pandemic.