Eurozone

In 1998, eleven member states of the European Union had met the euro convergence criteria, and the eurozone came into existence with the official launch of the euro (alongside national currencies) on 1 January 1999 in those countries: Austria, Belgium, Finland, France, Germany, Ireland, Italy, Luxembourg, the Netherlands, Portugal, and Spain. Greece qualified in 2000 and was admitted on 1 January 2001.

These twelve founding members introduced physical euro banknotes and euro coins on 1 January 2002. After a short transition period, they took out of circulation and rendered invalid their pre-euro national coins and notes.

Between 2007 and 2023, eight new states have acceded: Croatia, Cyprus, Estonia, Latvia, Lithuania, Malta, Slovakia, and Slovenia.

state	ISO code	adopted on 1 January of	population in 2021[2]	nominal GNI in 2021 in millions of USD[16]	nominal GNI as fraction of eurozone total	nominal GNI per capita in 2021 in USD	pre-euro currency	conversion rate of euro to pre-euro currency[17]	pre-euro currency was also used in	territories where euro is not used
Austria	AT	1999[18]	8,932,664	472,474	3.27%	52,893	schilling	13.7603
Belgium	BE	1999[18]	11,554,767	585,375	4.05%	50,661	franc	40.3399	Luxembourg
Croatia[lower-alpha 1]	HR	2023[19]	4,036,355	68,724	0.48%	17,026	kuna	7.53450
Cyprus	CY	2008[20]	896,007	25,634	0.18%	28,609	pound	0.585274		Northern Cyprus[lower-alpha 2]
Estonia	EE	2011[21]	1,330,068	35,219	0.24%	26,479	kroon	15.6466
Finland	FI	1999[18]	5,533,793	296,473	2.05%	53,575	markka	5.94573
France	FR	1999[18]	67,656,682	2,991,553	20.69%	44,217	franc	6.55957	Andorra Monaco	New Caledonia[lower-alpha 3] French Polynesia[lower-alpha 3] Wallis and Futuna[lower-alpha 3]
Germany	DE	1999[18]	83,155,031	4,298,325	29.72%	51,690	Mark	1.95583	Kosovo Montenegro
Greece	GR[lower-alpha 4]	2001[22]	10,678,632	212,807	1.47%	19,928	drachma	340.750
Ireland	IE	1999[18]	5,006,324	383,084	2.65%	76,520	pound	0.787564
Italy	IT	1999[18]	59,236,213	2,127,119	14.71%	35,909	lira	1936.27	San Marino Vatican City
Latvia	LV	2014[23]	1,893,223	37,295	0.26%	19,699	lats	0.702804
Lithuania	LT	2015[24]	2,795,680	60,884	0.42%	21,778	litas	3.45280
Luxembourg	LU	1999[18]	634,730	56,449	0.39%	88,934	franc	40.3399	Belgium
Malta	MT	2008[25]	516,100	15,948	0.11%	30,901	lira	0.429300
Netherlands	NL	1999[18]	17,475,415	967,837	6.69%	55,383	guilder	2.20371		Aruba[lower-alpha 5] Curaçao[lower-alpha 6] Sint Maarten[lower-alpha 6] Caribbean Netherlands[lower-alpha 7]
Portugal	PT	1999[18]	10,298,252	246,714	1.71%	23,957	escudo	200.482
Slovakia	SK	2009[26]	5,459,781	112,424	0.78%	20,591	koruna	30.1260
Slovenia	SI	2007[27]	2,108,977	59,608	0.41%	28,264	tolar	239.640
Spain	ES	1999[18]	47,398,695	1,407,936	9.74%	29,704	peseta	166.386	Andorra
eurozone	EZ[lower-alpha 8]	—	346,597,389[lower-alpha 9]	14,461,883	100.00%	41,725	—	—	—	see above

Three of the dependent territories of EU member states not part of the EU have adopted the euro:

• Territorial collectivity of Saint Barthélemy (French territory, with France ensuring eurozone laws are implemented)
• Overseas Collectivity of Saint-Pierre and Miquelon (French territory, with France ensuring eurozone laws are implemented)
• French Southern and Antarctic Lands (French territory, with France ensuring eurozone laws are implemented)

The euro is also used in countries outside the EU. Four states (Andorra, Monaco, San Marino, and Vatican City) have signed formal agreements with the EU to use the euro and issue their own coins.[28][29] Nevertheless, they are not considered part of the eurozone by the ECB and do not have a seat in the ECB or Euro Group.

Akrotiri and Dhekelia (located on the island of Cyprus) belong to the United Kingdom, but there are agreements between the UK and Cyprus and between UK and EU about their partial integration with Cyprus and partial adoption of Cypriot law, including the usage of euro in Akrotiri and Dhekelia.

Several currencies are pegged to the euro, some of them with a fluctuation band and others with an exact rate. The Bosnia and Herzegovina convertible mark was once pegged to the Deutsche mark at par, and continues to be pegged to the euro today at the Deutsche mark's old rate (1.95583 per euro). The Bulgarian lev was initially pegged to the Deutsche Mark at a rate of BGL 1000 to DEM 1 in 1997, and has been pegged at a rate of BGN 1.95583 to EUR 1 since the introduction of the euro and the redenomination of the lev in 1999. The West African and Central African CFA francs are pegged exactly at 655.957 CFA to 1 EUR. In 1998, in anticipation of Economic and Monetary Union of the European Union, the Council of the European Union addressed the monetary agreements France had with the CFA Zone and Comoros, and ruled that the ECB had no obligation towards the convertibility of the CFA and Comorian francs. The responsibility of the free convertibility remained in the French Treasury.

Kosovo and Montenegro officially adopted the euro as their sole currency without an agreement and, therefore, have no issuing rights.[29] These states are not considered part of the eurozone by the ECB. However, sometimes the term eurozone is applied to all territories that have adopted the euro as their sole currency.[30][31][32] Further unilateral adoption of the euro (euroisation), by both non-euro EU and non-EU members, is opposed by the ECB and EU.[33]

The chart below provides a full summary of all applying exchange-rate regimes for EU members, since the birth, on 13 March 1979, of the European Monetary System with its Exchange Rate Mechanism and the related new common currency ECU. On 1 January 1999, the euro replaced the ECU 1:1 at the exchange rate markets. During 1979–1999, the D-Mark functioned as a de facto anchor for the ECU, meaning there was only a minor difference between pegging a currency against the ECU and pegging it against the D-Mark.

Sources: EC convergence reports 1996-2014, Italian lira, Spanish peseta, Portuguese escudo, Finnish markka, Greek drachma, Sterling

The eurozone was born with its first 11 member states on 1 January 1999. The first enlargement of the eurozone, to Greece, took place on 1 January 2001, one year before the euro physically entered into circulation. The next enlargements were to states which joined the EU in 2004, and then joined the eurozone on 1 January of the year noted: Slovenia in 2007, Cyprus in 2008, Malta in 2008, Slovakia in 2009, Estonia in 2011, Latvia in 2014, and Lithuania in 2015. Croatia, which acceded to the EU in 2013, adopted the euro in 2023.

All new EU members joining the bloc after the signing of the Maastricht Treaty in 1992 are obliged to adopt the euro under the terms of their accession treaties. However, the last of the five economic convergence criteria which need first to be complied with in order to qualify for euro adoption, is the exchange rate stability criterion, which requires having been an ERM-member for a minimum of two years without the presence of "severe tensions" for the currency exchange rate.

In September 2011, a diplomatic source close to the euro adoption preparation talks with the seven remaining new member states who had yet to adopt the euro at that time (Bulgaria, the Czech Republic, Hungary, Latvia, Lithuania, Poland, and Romania), claimed that the monetary union (eurozone) they had thought they were going to join upon their signing of the accession treaty may very well end up being a very different union, entailing a much closer fiscal, economic, and political convergence than originally anticipated. This changed legal status of the eurozone could potentially cause them to conclude that the conditions for their promise to join were no longer valid, which "could force them to stage new referendums" on euro adoption.[34]

A clickable Euler diagram^[file] showing the relationships between various multinational European organisations and agreements

Seven countries (Bulgaria, the Czech Republic, Denmark, Hungary, Poland, Romania, and Sweden) are EU members but do not use the euro.

Before joining the eurozone, a state must spend at least two years in the European Exchange Rate Mechanism (ERM II). As of January 2023, the Danish central bank and the Bulgarian central bank participate in ERM II.

Denmark obtained a special opt-out in the original Maastricht Treaty, and thus is legally exempt from joining the eurozone unless its government decides otherwise, either by parliamentary vote or referendum. The United Kingdom likewise had an opt-out prior to withdrawing from the EU in 2020.

The remaining six countries are obliged to adopt the euro in future, although the EU has so far not tried to enforce any time plan. They should join as soon as they fulfill the convergence criteria, which include being part of ERM II for two years. Sweden, which joined the EU in 1995 after the Maastricht Treaty was signed, is required to join the eurozone. However, the Swedish people turned down euro adoption in a 2003 referendum and since then the country has intentionally avoided fulfilling the adoption requirements by not joining ERM II, which is voluntary.[35][36] Bulgaria joined ERM II on 10 July 2020.[37]

Interest in joining the eurozone increased in Denmark, and initially in Poland, as a result of the financial crisis of 2007–2008. In Iceland, there was an increase in interest in joining the European Union, a pre-condition for adopting the euro.[38] However, by 2010 the debt crisis in the eurozone caused interest from Poland, as well as the Czech Republic, Denmark and Sweden to cool.[39]

In the opinion of journalist Leigh Phillips and Locke Lord's Charles Proctor,[40][41] there is no provision in any European Union treaty for an exit from the eurozone. In fact, they argued, the Treaties make it clear that the process of monetary union was intended to be "irreversible" and "irrevocable".[41] However, in 2009, a European Central Bank legal study argued that, while voluntary withdrawal is legally not possible, expulsion remains "conceivable".[42] Although an explicit provision for an exit option does not exist, many experts and politicians in Europe have suggested an option to leave the eurozone should be included in the relevant treaties.[43]

On the issue of leaving the eurozone, the European Commission has stated that "[t]he irrevocability of membership in the euro area is an integral part of the Treaty framework and the Commission, as a guardian of the EU Treaties, intends to fully respect [that irrevocability]."[44] It added that it "does not intend to propose [any] amendment" to the relevant Treaties, the current status being "the best way going forward to increase the resilience of euro area Member States to potential economic and financial crises.[44] The European Central Bank, responding to a question by a Member of the European Parliament, has stated that an exit is not allowed under the Treaties.[45]

Likewise there is no provision for a state to be expelled from the euro.[46] Some, however, including the Dutch government, favour the creation of an expulsion provision for the case whereby a heavily indebted state in the eurozone refuses to comply with an EU economic reform policy.[47]

In a Texas law journal, University of Texas at Austin law professor Jens Dammann has argued that even now EU law contains an implicit right for member states to leave the eurozone if they no longer meet the criteria that they had to meet in order to join it.[48] Furthermore, he has suggested that, under narrow circumstances, the European Union can expel member states from the eurozone.[49]

In April 2008 in Brussels, future European Commission President Jean-Claude Juncker suggested that the eurozone should be represented at the IMF as a bloc, rather than each member state separately: "It is absurd for those 15 countries not to agree to have a single representation at the IMF. It makes us look absolutely ridiculous. We are regarded as buffoons on the international scene".[53] In 2017 Juncker stated that he aims to have this agreed by the end of his mandate in 2019.[54] However, Finance Commissioner Joaquín Almunia stated that before there is common representation, a common political agenda should be agreed upon.[53]

Leading EU figures including the commission and national governments have proposed a variety of reforms to the eurozone's architecture; notably the creation of a Finance Minister, a larger eurozone budget, and reform of the current bailout mechanisms into either a "European Monetary Fund" or a eurozone Treasury. While many have similar themes, details vary greatly.[55][56][57][58]

HICP figures from the ECB, overall index:[61]

Interest rates for the eurozone, set by the ECB since 1999.[62] Levels are in percentages per annum. Between June 2000 and October 2008, the main refinancing operations were variable rate tenders, as opposed to fixed rate tenders. The figures indicated in the table from 2000 to 2008 refer to the minimum interest rate at which counterparties may place their bids.[4]

The following table states the ratio of public debt to GDP in percent for eurozone countries given by EuroStat.[63] The euro convergence criterion is to not exceed 60%.

Comparison of government surplus/deficit (2001–2012) of eurozone, United States and United Kingdom

The primary means for fiscal coordination within the EU lies in the Broad Economic Policy Guidelines which are written for every member state, but with particular reference to the 20 current members of the eurozone. These guidelines are not binding, but are intended to represent policy coordination among the EU member states, so as to take into account the linked structures of their economies.

For their mutual assurance and stability of the currency, members of the eurozone have to respect the Stability and Growth Pact, which sets agreed limits on deficits and national debt, with associated sanctions for deviation. The Pact originally set a limit of 3% of GDP for the yearly deficit of all eurozone member states; with fines for any state which exceeded this amount. In 2005, Portugal, Germany, and France had all exceeded this amount, but the Council of Ministers had not voted to fine those states. Subsequently, reforms were adopted to provide more flexibility and ensure that the deficit criteria took into account the economic conditions of the member states, and additional factors.

The Fiscal Compact[66][67] (formally, the Treaty on Stability, Coordination and Governance in the Economic and Monetary Union),[68] is an intergovernmental treaty introduced as a new stricter version of the Stability and Growth Pact, signed on 2 March 2012 by all member states of the European Union (EU), except the Czech Republic, the United Kingdom,[69] and Croatia (subsequently acceding the EU in July 2013). The treaty entered into force on 1 January 2013 for the 16 states which completed ratification prior of this date.[70] As of 1 April 2014, it had been ratified and entered into force for all 25 signatories.

Olivier Blanchard suggests that a fiscal union in the eurozone can mitigate devastating effects of the single currency on the eurozone peripheral countries. But he adds that the currency bloc will not work perfectly even if a fiscal transfer system is built, because, he argues, the fundamental issue about competitiveness adjustment is not tackled. The problem is, since the eurozone peripheral countries do not have their own currencies, they are forced to adjust their economies by decreasing their wages instead of devaluation.[71]