This paper empirically evaluates four types of costs that may result from an international sovereign default: reputational costs, international trade exclusion costs, costs to the domestic economy through the financial system, and political costs to the authorities. It finds that the economic costs are generally significant but short-lived, and sometimes do not operate through conventional channels. The political consequences of a debt crisis, by contrast, seem to be particularly dire for incumbent governments and finance ministers, broadly in line with what happens in currency crises. [JEL F34, F36, H63, G15] IMF Staff Papers (2009) 56, 683–741. doi:10.1057/imfsp.2009.21 There is broad consensus in the economic literature that the presence...