The paper presents the dynamics of fiscal revenues and gross domestic product in some European Union countries: the Czech Republic, Slovakia and Slovenia, between 2007 and 2016. The economic and financial analysis is based on the time comparison of earnings and gross domestic product over the period using the following indicators: fiscal pressure, relative revenue deviation, tax pressure dynamics, absolute revenue deviation, absolute GDP deviation, the relative change in income index and the relative change in gross domestic product index. Determination of causal links was made using the regression equation and the correlation coefficient. The case study is based on data published by Eurostat, which are being processed and analyzed.