In a speech in Sofia, European Central Bank President Christine Lagarde set out the ECB’s view of what Bulgaria’s entry into the euro area on 1 January 2026 will mean in practice, highlighting expected gains in prosperity and economic security while addressing public concerns about sovereignty and price increases during the changeover. Lagarde argued that euro adoption would remove remaining currency frictions in the Single Market, pointing to Bulgaria’s existing integration with Europe and estimating that small and medium-sized enterprises will save around one billion levs a year in currency conversion costs. She also linked euro area membership to wider access to European capital markets and lower funding costs, citing Bulgaria’s improved credit ratings and narrower sovereign spreads. On security, the speech emphasised that joining the euro area provides institutional protection against exchange rate volatility and reduces exposure to sudden shifts in global capital flows, noting that around 83% of Bulgaria’s imports are invoiced in what will become its domestic currency. Addressing sovereignty, Lagarde stressed that Bulgaria’s currency board already implies importing monetary policy without representation, whereas the Governor of the Bulgarian National Bank will join the ECB’s Governing Council with an equal vote; on prices, she cited past changeovers where the inflation impact was modest and temporary at around 0.2 to 0.4 percentage points, and pointed to planned safeguards in Bulgaria including extended dual price display, active monitoring and penalties. The speech also warned that the main risk seen in previous enlargement waves was a loss of reform momentum after joining the euro area, framing sustained institutional alignment and a transparent changeover process as central to realising the full benefits after adoption.