How Czechia joined NATO in 1999 and the EU in 2004, and why it chose to

For most of the 1990s the main parties agreed on where Czechoslovakia, and then Czechia, belonged: in the West. The EU would anchor the economy and the rule of law, NATO would provide security. What was uncertain was how quickly the door would open and what Czechs would be asked to give up in exchange.

The two memberships came through different processes and carry different obligations. NATO is a military alliance in which an attack on one is treated as an attack on all. The EU is a legal and economic union whose members share rules, markets and institutions; Czechia in the European Union: what membership means covers it in detail. This piece covers how both began.

Why West?

After the revolution the new leaders saw the Western alliance as protection against any return of Soviet-style domination. Munich in 1938 (see the Munich Agreement and the occupation) and the invasion of 1968 meant that security was no abstraction. The Warsaw Pact was dissolved in 1991 and Soviet troops left the same year, which opened a security gap that many in Central Europe wanted to fill.

The case for the EU was economic and, for many, a matter of identity. Membership offered a large market, investment and a framework of law and institutions, and Václav Havel, among others, spoke of a return to Europe. Trade already leaned towards Germany and Western Europe, and the economy had been reformed (see Czech privatisation in the 1990s explained).

NATO: the first door

NATO's enlargement was controversial among the existing members and with Russia, but in 1997 the alliance invited the Czech Republic, Hungary and Poland to begin accession talks. The Czech Parliament ratified the accession, and the country was formally admitted on 12 March 1999, in a ceremony held in the United States. There was no referendum, and critics noted that public support was far from overwhelming. Membership came just before the alliance launched its air campaign in Kosovo in March 1999, which tested the new members' political consensus. The government backed the alliance; parts of public opinion were uneasy.

Since then Czechia has taken part in NATO missions, including in the Balkans and Afghanistan, and has contributed to the alliance's presence on its eastern flank. Defence spending commitments are agreed periodically; NATO and the Ministry of Defence publish the current figures.

The EU: a longer route

The path to the EU was long and technical. Czechoslovakia signed a Europe (association) agreement in 1991, and the Czech Republic signed its own after the split. It took effect in 1995. The country applied for membership in January 1996, and accession negotiations opened in 1998. The negotiations were divided into thirty-one chapters, covering everything from agriculture and the free movement of workers to competition and the environment. The Czech side had to adopt the full body of EU law, the acquis, before joining.

Talks concluded at the Copenhagen summit in December 2002. The accession treaty was signed in Athens on 16 April 2003. Then the question went to the voters. In a referendum on 13 and 14 June 2003, about 77 per cent of those who voted said yes, on a turnout of about 55 per cent. It was the first nationwide referendum in the Czech Republic, and Parliament had to pass a special constitutional law to allow it. Czechia joined on 1 May 2004, along with Cyprus, Estonia, Hungary, Latvia, Lithuania, Malta, Poland, Slovakia and Slovenia.

The conditions for entry

Candidates were judged against the Copenhagen criteria, set in 1993. They require stable institutions that guarantee democracy and the rule of law, a functioning market economy able to cope with competition inside the Union, and the ability to take on the obligations of membership. In practice that meant years of legislation to align national rules with EU law, and regular Commission reports that named the gaps. It was a long exam, and the 2003 referendum was the last paper.

What changed after 2004

The practical effects came quickly. EU citizens gained the right to live and work in Czechia, and Czech citizens gained the same rights across the Union. Border checks with neighbouring EU countries were removed when Czechia entered Schengen on 21 December 2007, for land and sea borders, and airports followed in March 2008. Structural funds started to flow into regions and projects, as explained in Czech EU funds and cohesion policy. Czech goods and services gained a wider market. Czechia held the rotating presidency of the Council of the EU in the first half of 2009 and again in the second half of 2022.

Not everything changed. Czechia has not adopted the euro, and the koruna remains the national currency. The accession treaty commits new members to join the euro in principle once they meet the conditions, but no date has been set (as of 2026) and the decision is political. For more, see what the Czech koruna is and why Czechia kept it.

Debate and doubts

Support for NATO and the EU has never been uniform. In the early 2000s Eurosceptic voices, among them the then president, argued that the EU would erode national sovereignty. Others have criticised how EU funds are spent, or Brussels bureaucracy. More recently the debate has shifted to security, energy and the response to Russia's invasion of Ukraine in 2022. Opinion polls on these subjects move often, so check a current one from a reputable institute.

What it means for you

EU law touches residents in several areas: the right of EU citizens to live and work, consumer protection, data protection, mobile roaming and, for non-EU nationals, parts of the immigration framework. NATO is less visible in daily life, though allied exercises are sometimes held in the country.

For the legal basis, start with the Ministry of Foreign Affairs and the official NATO and EU websites.

Frequently asked questions

When did Czechia join NATO?

On 12 March 1999, together with Hungary and Poland. There was no referendum; Parliament ratified the accession.

When did it join the EU?

On 1 May 2004, along with nine other countries, after a referendum in June 2003.

Is Czechia in the euro area?

No. The koruna remains the currency, and no date for adopting the euro has been set.

When did Czechia join Schengen?

On 21 December 2007 for land and sea borders, with airports following in March 2008.