Can the single currency keep expanding?
At the stroke of midnight on January 1, 2026, the facade of the Bulgarian National Bank in Sofia was lit up with the display of a golden Euro coin. Crowds gathered in sub-zero temperatures to watch the Bulgarian lev—meaning “lion,” the state currency since 1880—relegated to history. By morning, Bulgaria had become the Eurozone’s 21st member state: a decision which, at first glance, appears nothing more than a technical monetary change. But any change as momentous as this is loaded with deep historical symbolism, economic consequences, and political tensions within the European Union (EU). As a result, whether this change is also a wise one is a live debate.
To understand the significance of Bulgaria becoming the latest economy to join the euro—marking a continual expansion of the eurozone into the post-Soviet sphere—it is important to recount some of the euro’s history. Introduced in 1999 and entering physical circulation in 2002, the euro is the shared currency of the EU, and intentionally designed to achieve the apotheosis of the original aim of the European Coal and Steel Community (1952), which was to bind European economies together so tightly that the wars of the 19th and 20th centuries would become structurally impossible.
Consequently, joining the euro is not simply swapping one currency for another. It means surrendering monetary policy and submitting to the European Central Bank (ECB)—but getting, in return, access to the full machinery of European financial integration, which include lower borrowing costs, frictionless trade, and a chance to contribute to decisions over the economic future of the continent.
That last one was the most salient for the ECB itself, with President Christine Lagarde saying Bulgaria will now have “a view, a voice, a vote.” Bulgaria’s National Bank governor will be entitled to a full seat at the ECB’s governing council, which determines the interest rates for the entire eurozone. For a nation of just over 6 million citizens, and an economy that sends nearly two-thirds (64%) of its exports to the rest of the continent, this is a qualitative leap in institutional power.
Moreover, choosing to join the eurozone is not simply economic, but political. Bulgarian Prime Minister Rossen Zhelyakov said it himself when he declared in November that joining the euro is “not just a currency but a strategic choice.” This strategic dimension is central to understanding Bulgaria’s modern identity, as both a post-imperial nation during the decline of the Ottoman Empire, and a post-communist nation.
Bulgaria emerged from the post-Soviet bloc in 1989 following Mikhail Gorbachev’s abandonment of the Brezhnev Doctrine, which had kept communist governments propped up by Moscow’s willingness to intervene. Not only this, but as a member of the Warsaw Pact and the Soviet Council for Mutual Economic Assistance, Bulgaria’s economy was almost fully integrated into the Soviet system.
The divorce from the Soviet Union was not, therefore, a clean one, but a prolonged and painful transition—but it did eventually lead to free-market capitalism. During the 1990s, Bulgaria experienced hyperinflation, banking collapse, and political instability. But in 1997, after a devastating financial crisis saw inflation soar into quadruple digits, and was “so deep that [it] quickly crippled the real sector and finally culminated in a political crisis,” the lev was stabilized by a currency board system that pegged it to the Deutsche Mark and, eventually, the euro itself. Bulgaria’s journey to alignment with the West had begun.
This decision to tie the lev to the Deutsch Mark and later the euro means that, in practical terms, Bulgaria has been operating under euro-monetary policy for nearly three decades, only without any capacity to shape the decision-making that accession to the euro now confers. Moreover, this journey continued with Bulgaria’s accession to the EU itself in 2007, along with full membership of the Schengen Area in 2025, the zone that allows the free movement of labor and goods.
Retiring the lev voluntarily is, to reaffirm the point here, a political choice—and a statement. Since its introduction in 1880, the lev has outlasted two empires and a communist government, both of which were imposed on Bulgaria from outside and without any popular support. To choose to surrender currency autonomy willingly is, seemingly paradoxically, an act of national determination. But since it is in many ways codifying the economic reality of the last 30 years, it is a move that enhances the political sovereignty of the nation: it is not for nothing that Dimitar Radev, head of the Bulgarian National Bank, referred to it as a “sign of belonging: that [Bulgaria’s] place is not on the periphery, but in a space of common rules, trust, and responsibility.”
At least, so go the arguments in favor. The celebrations in Sofia were nearly overshadowed by something the official imagery and government statements preferred not to dwell on: deep and persistent—and entirely legitimate—public opposition, and the lack of any obvious mandate for the shift.
Bulgaria’s own Ministry of Finance commissioned a survey, published in June 2025, that showed the Bulgarian public almost perfectly divided: 46.8% opposed the euro, while 46.5% were in favor. Likewise, in November 2025, a Eurobarometer poll showed that 49% of Bulgarians opposed the euro, with 42% in favor. There are real anxieties at play in the country that are not fringe worries here.
Chief among anxieties are inflation and the political divisions that come with European integration. Food prices in Bulgaria rose by 5% year-on-year in November 2025—more than double the eurozone average. Small business owners in cities like Haskovo warned that while economic indicators might improve, the population would become poorer while larger enterprises prospered. EU investment since 2007 has totaled €16.3 billion, but much of it flowed to Sofia and Plovdiv; rural Bulgaria has felt the benefit far less clearly.
These concerns were compounded by a profound sense of democratic grievance. President Rumen Radev repeatedly called for a referendum before adoption, which the parliament dismissed. But civic engagement in Bulgaria is remarkably high: in December 2025, anti-corruption protests brought down the conservative government entirely, sending the country toward its eighth parliamentary election in five years even as euro coins were being loaded into ATMs.
Joining the euro is both a genuine milestone for Bulgaria—and a genuine wound at once. The economic case is strong: lower transaction costs, greater investment stability, improved credit ratings, and (most significantly) a formal voice in monetary policy. The symbolism matters. But durable European integration has never been built on elite consensus alone—just look at Brexit. The protests, the polls, the fallen government are all obstacles, and not ones easily managed. Bulgaria must tread lightly here, and the citizens must feel a genuine sense of improvement in their lives if economic integration is to be successful.
