Euroization

Euroization describes the process by which a jurisdiction outside the formal eurozone adopts the euro for some or all monetary functions. It is the European analogue of "dollarization" and can take several forms.

Full (unilateral) euroization occurs when a state replaces its national currency with the euro without the consent of EU institutions or a formal monetary agreement. Kosovo and Montenegro are the standard examples: both used the Deutsche Mark in the late 1990s and transitioned to the euro when notes and coins entered circulation in January 2002, without ever joining the EU or signing a monetary agreement with the European Central Bank.

Agreed euroization takes place under a formal monetary agreement with the EU. Andorra, Monaco, San Marino, and Vatican City use the euro as legal tender and are permitted to issue limited quantities of euro coins under bilateral arrangements.

Partial or de facto euroization refers to the unofficial but widespread use of euros alongside a domestic currency for savings, pricing, real-estate transactions, or cross-border trade. This is common in parts of the Western Balkans and in some EU member states that retain their own currencies, where bank deposits and mortgages are frequently denominated in euros.

Euroization is distinct from joining the euro area through the EU Treaties. Formal accession requires meeting the Maastricht convergence criteria (on inflation, deficits, debt, exchange rates, and long-term interest rates) and typically two years in ERM II. Unilateral euroizers gain price stability and lower transaction costs but forfeit independent monetary policy and lender-of-last-resort access to the ECB. The ECB and European Commission have historically discouraged unilateral euroization by EU candidate countries, viewing it as bypassing the accession path laid out in the Treaty on the Functioning of the European Union.

Croatia's 2023 euro adoption, by contrast, was full eurozone membership, not euroization.