Bulgaria joins the Eurozone: Why self-service technology is key to successful currency adoption

In a milestone moment for the European Union, Bulgaria became the newest member of the Eurozone on January 1, 2026, officially adopting the euro as its national currency. Throughout the month of January, consumers and businesses were able to use both the Bulgarian lev (BGN) and the euro (EUR) for payments as part of the transitional period.

During this potentially tumultuous change, the preparedness of financial institutions — particularly the readiness of their self-service channel — played a crucial role in ensuring a smooth transition. As of February 1, 2026, the process was officially completed, with the euro becoming Bulgaria’s sole legal tender, marking a significant step in the country’s economic integration with the EU and aligning it with other Eurozone economies.

Bulgaria — the 21st state to join the Eurozone

On January 1, 2026, Bulgaria became the 21st member of the Eurozone—a long‑anticipated step in the country’s nearly two‑decade journey toward full European integration. Bulgaria joined the European Union in 2007 and, more recently, became a full member of the Schengen Area on January 1, 2025. Yet, this final step—transitioning from the Bulgarian lev to the euro—has sparked substantial public skepticism and concern about how smoothly the changeover would unfold, despite continuous efforts by financial institutions and government bodies to prepare citizens.

Since the announcement that Bulgaria was to adopt the euro, institutions launched extensive campaigns aimed at ensuring a seamless public transition. National television regularly aired educational segments explaining denominations, security features, and ways to identify genuine euro banknotes to help prevent counterfeiting and protect consumers. Financial institutions across the country also created dedicated web pages detailing the timeline, transition process, and what customers should expect—messages echoed repeatedly across social media and banking apps.  

As part of the transition, Bulgarians were able to use both physical lev and euro for payments until January 31, 2026. From February onward, converting remaining lev into euro can only be done through bank branches or post offices, which will exchange the currency at the fixed rate of 1 EUR = 1.95583 BGN without service fees until June 30, 2026.

However, the simplest method of conversion was depositing lev into personal bank accounts before January 1, as accounts were automatically converted to euro at the fixed rate. As the transition overlapped with the festive season—a period traditionally associated with gift‑giving and substantial cash exchange—banks saw exceptionally high deposit volumes. Self‑service channels proved essential during this period: all deposit‑enabled ATMs accepted lev until the final hours of 2025, while two major banks extended lev deposit acceptance through January 31.

In moments of large‑scale financial change, a well‑developed self‑service infrastructure doesn’t just complement branch operations—it becomes essential.

The role of self-service

As of February 27, 2026, the Bulgarian National Bank announced that a total of 87% of lev banknotes and coins that were in use at the beginning of 2025 had already been retired from circulation. The number of ATM deposit transactions climbed to 560,000 in December 2025,which was 34% increase year-on-year —a direct reflection of households and businesses preparing for the currency transition.

Among the other methods of withdrawing lev from circulation, the self-service channel also played a role. ATMs were used for 14% of the total deposit transactions in the country in December 2025. Moreover, compared with December 2024, the total value of ATM deposits increased by 85%, reaching 471 million euro (over 918 million lev). The number of ATM deposit transactions climbed to 560,000 in December 2025, which was 34% increase year-on-year —a direct reflection of households and businesses preparing for the currency transition.

The report also highlighted the competitive advantages for financial institutions that invest in deposit-enabled ATMs. These include:

• ‍Reduced queues in bank branches, especially during peak periods
• ‍Attracting small and medium-sized businesses, which value the flexibility to deposit cash at any time
• ‍Lowering operational costs associated with manual cash handling, while increasing overall efficiency

Alongside assisting in retiring Bulgarian lev from use, the self-service channel also played a role in distributing euro banknotes. ATMs were ready to process transactions in euro as early as the clock struck midnight on New Year’s eve and the first dispense transaction in euro occurred mere 20 seconds after midnight on January 1st. For the first 48 hours of 2026, ATMs in Bulgaria processed more than 125,000 cash dispense transactions with total value exceeding 18 million euro, and nearly 3,500 deposit transactions with total value close to 3.8 million euro.

These reports underline the strategic importance of digital-first multi-function ATM network in enhancing financial institutions’ competitiveness and supporting broader modernization of banking services.

Preparation for the future

With Bulgaria becoming the 21st Euro zone member, six EU countries remain outside the monetary union: Denmark, Poland, Hungary, Romania, Sweden, and the Czech Republic. Denmark has an official opt‑out, but the remaining five are obligated to adopt the euro once they meet all convergence criteria.

Among them, Romania and the Czech Republic appear most likely to adopt the euro next. Romania has expressed willingness to join and has set a tentative target between 2027 and 2028, though it does not yet meet the necessary convergence criteria.  Conversely, the Czech Republic currently meets all convergence criteria, according to a January 2026 report by Erste Group, positioning the country closer to following Bulgaria’s path in the coming years.

Although each country will move at its own pace, the remaining non‑euro EU members (excluding Denmark) are expected to undergo transitions like those experienced by Croatia in 2023 and Bulgaria in 2026. Bulgaria now provides a fresh, modern example of effective preparation, communication, and infrastructure management—offering valuable lessons for future adopters.

Technology as a foundation for seamless transition

Supporting a nationwide currency change is no small task for financial institutions. The transition highlights the importance of robust, modern technology capable of streamlining processes and relieving pressure on branch staff. Established as a crucial touchpoint between banks and their customers, the ATM plays a pivotal role during such transitions. Shifting high‑volume transactions to self‑service channels frees branch teams to focus on higher‑priority tasks, improves operational efficiency, and ensures a faster, smoother customer experience.

In moments of large‑scale financial change, a well‑developed self‑service infrastructure doesn’t just complement branch operations—it becomes essential.