The article considers the tax potential of the composition of GDP by type of primary incomes in 2000—2010 by main economic activities and branches of industry. The analysis has shown that the components of GDP, which decline (net income), comprise the basis of the tax system; meanwhile the proportion of the components, hardly covered by taxation (hidden salary), or those, which taxation is difficult to control (net mixed income), increases. The author comes to the conclusion that the proportion of the industry tax burden and the share of gross value added in GDP should be balanced. Otherwise, the tax system becomes ineffective. The analysis of the structure of industry tax revenues over time suggests a high differentiation of taxes on economic activities and industries.