The correct answer is the Euro, which has been Austria's official currency since 1 January 1999 for accounting purposes and since 1 January 2002 for physical notes and coins, when it replaced the Austrian Schilling. Austria was among the original eleven countries that adopted the Euro at its launch, reflecting its deep economic integration with Western Europe following its 1995 EU accession. The Euro is managed by the European Central Bank and used by twenty of the twenty-seven EU member states as of the mid-2020s, forming the Eurozone. The Swiss Franc, offered as a distractor, is the currency of Switzerland and Liechtenstein, both of which border Austria but deliberately remain outside the EU and Eurozone to preserve monetary independence. The Hungarian Forint belongs to Hungary, another Austrian neighbour and EU member, but Hungary has retained its own currency and has not adopted the Euro despite years of membership. Similarly, the Czech Koruna is the currency of the Czech Republic, which also borders Austria and belongs to the EU but has likewise chosen to stay outside the Eurozone. A frequent exam trap is assuming that all EU members share the Euro; in reality several member states, including Poland, Hungary, Czechia and Sweden, use their own national currencies, while non-EU states like Kosovo and Montenegro have unilaterally adopted the Euro without formal membership. Recognising Austria's neighbours and their distinct currencies helps candidates avoid mixing up Central European monetary systems in mixed-country questions. The concise revision point is that Austria uses the Euro, unlike three of its eight bordering countries, Switzerland, Hungary and Czechia, each of which retains a separate national currency.