Bulgaria adopts Euro: XBRL taxonomy updated

Posted on January 18, 2026 by Editor

On 1 January 2026, Bulgaria officially adopted the euro, becoming the 21st member of the euro area. As you would expect, XBRL International has updated the Country and Currency Taxonomy to reflect this significant change. The Bulgarian lev is now listed as a historic currency, with the euro marked as the applicable legal tender for Bulgaria going forward.

This change ensures that XBRL reporting systems accurately reflect Bulgaria's new monetary status. The revised taxonomy includes both dated and current variants, enabling users to distinguish between historical and present-day reporting contexts. The update supports smooth data continuity and comparability across time periods, a critical component for regulatory, financial, and statistical reporting.

Bulgaria's accession to the eurozone has been in progress for several years, with the country joining the Exchange Rate Mechanism II (ERM II) in 2020 as a preparatory step. The Council of the European Union gave final approval in December 2025, confirming that Bulgaria had met the convergence criteria for entry.

Explore the Country and Currency Taxonomy Dated variant and Current variant. There's guidance too.