VAT is one of the most decisive tax revenues sources in the EU Member States. Due to financial frauds and insufficient tax system, there is a billion loss of EUR every year in the European budget. The article deals with the impact of the tax evasion on economies of the EU Member States. By applying the top-down approach, we observed tax gaps as a quantifier of tax evasion from 2004 to 2017. The period around the economic crisis in 2009 was examined in more detail, as there was a sharp change in the evolution of tax gaps. We constructed a regression model, which examined the relationship of the tax gap and VAT tax revenues to selected determinants of tax evasion. The results showed that tax gaps in the Member States have been growing every year. We also found that there is an increase in tax revenues, but tax liabilities increase to greater extent.