This paper is an empirical study of fiscal policy in countries with extreme monetary regimes. We study members of multilateral currency unions, dollarized countries that officially use the money of another country, and countries using currency boards. We find that belonging to an international common currency area is not associated with fiscal discipline; if anything, spending and taxes are higher inside currency unions. This effect is especially pronounced for dollarized countries that unilaterally adopt the currency of another country. Currency boards are associated with fiscal restraint.