The European debt crisis, often also referred to as the eurozone crisis or the European sovereign debt crisis, is a multi-year debt crisis that has been taking place in the European Union since the end of 2009. Several eurozone member states were unable to repay or refinance their government debt or to bail out over-indebted banks under their national supervision without the assistance of third parties like other eurozone countries, the European Central Bank, or the International Monetary Fund .
The eurozone crisis was caused by a balance-of-payments crisis, which is a sudden stop of foreign capital into countries that had substantial deficits and were dependent on foreign lending. The crisis was worsened by the inability of states to resort to devaluation (reductions in the value of the national currency). Debt accumulation in some eurozone members was in part due to macroeconomic differences among eurozone member states prior to the adoption of the euro.