Bulgaria votes on 19 April in another snap parliamentary election, but the contest is about more than who finishes first. With former president Rumen Radev’s new alliance leading in polls, the real question for Brussels is whether yet another period of instability in Sofia will weaken EU unity on sanctions, defence production, rule-of-law reform and the use of common funds.
Bulgaria returns to the polls on 19 April for yet another snap parliamentary election, the latest episode in a crisis that has left the country struggling to produce a durable governing majority. This time, however, the stakes are larger for the European Union.
The immediate reason is political. Former president Rumen Radev, who resigned in January and was later cleared by the Constitutional Court to leave office before the end of his term, has re-entered frontline politics with a new alliance, Progressive Bulgaria. Reuters reported that his departure fuelled speculation about a party project, and later confirmed that Progressive Bulgaria had been formed to contest the April vote. Polling cited by Reuters and Bulgarian News Agency suggests the alliance is ahead of GERB-UDF and the reformist PP-DB bloc.
The second reason is institutional. Bulgaria only joined the euro area on 1 January 2026, after the European Commission and the Council completed the final legal steps in 2025. It also entered the Schengen area fully from 1 January 2025. That makes the present instability more consequential for the Union than in previous election cycles: this is no longer a peripheral member on the edge of integration, but a state now fully embedded in two core EU projects.
Radev’s rise matters in Brussels because his record has long caused concern among Bulgaria’s pro-European camp. Reuters has described him as facing questions over his pro-Kremlin stance on the war in Ukraine and his scepticism about the euro. He has also previously criticised sanctions on Russia and questioned Western military support for Kyiv. That does not mean Bulgaria is on the verge of an outright geopolitical realignment. It does mean that an EU member state on the Black Sea could become less predictable at a moment when the Union is trying to maintain cohesion on Russia policy, defence procurement and long-term support for Ukraine.
That risk has become more visible since Sofia signed a ten-year security cooperation agreement with Ukraine on 30 March during caretaker prime minister Andrey Gyurov’s visit to Kyiv. According to the Ukrainian presidency, the agreement covers continued military assistance, defence-industrial cooperation, joint production of drones and ammunition, and the use of the EU’s SAFE instrument. Bulgarian debate over the accord has been noisy, but the text itself appears more framework than treaty obligation, and Bulgarian officials have since stressed that it creates no automatic military commitments.
For the EU, the important point is not whether Bulgaria suddenly halts cooperation with Ukraine. It is whether domestic political competition turns Ukraine policy into a tool of electoral mobilisation, narrowing Sofia’s room for manoeuvre in Brussels. That would matter on sanctions, on defence-industrial coordination, and on future common financing debates. It would also matter because Bulgaria is one of the member states with the greatest need for stable governance if it is to absorb EU money effectively and improve infrastructure and administrative performance. The country needs a functioning government to make better use of EU funds, attract investment and address entrenched corruption.
The arithmetic after 19 April is unlikely to produce clarity. GERB remains competitive, but its leader Boyko Borissov is still unacceptable to many reformist voters because of long-running corruption allegations, which he denies. PP-DB, for its part, has insisted on a “cordon sanitaire” around Delyan Peevski and the MRF-New Beginning orbit, making coalition-building even harder. Bulgarian public debate increasingly refers to a “Borissov-Peevski model”, a sign that the anti-corruption cleavage remains central to the country’s deadlock.
That leaves Bulgaria facing a familiar outcome: a fragmented parliament, failed coalition talks, another caretaker administration and the likelihood that the country’s strategic direction will remain unresolved until the presidential election later this year. In the meantime, Brussels may find that the real issue is not whether Sofia becomes openly anti-European, but whether a politically exhausted member state begins to drift into semi-permanent ambiguity.
For the EU, ambiguity has a cost. It weakens collective signalling to Moscow, complicates common defence planning, and leaves another fissure line running through the Union’s eastern flank. Bulgaria’s election may not produce a dramatic rupture. Yet in 2026, after euro entry and Schengen accession, continued paralysis in Sofia is no longer merely a Bulgarian problem. It is a European one.
