The aim of the thesis is an analysis of the principle of free movement of capital, which applies directly to the laws of EU countries. The enforcement activity of the European Commission ensuring that EU countries properly apply the rules of the Treaty will be studied. Most common restrictions to the free movement of capital and acts to eliminate any barrier that is incompatible with the Treaty will be defined through analysis of the European Court of Justice case law. Finally, the powers of the Commission will be evaluated and measures will be proposed to tackle possible shortcomings found through the analysis.