Following the adoption of the euro as Bulgaria’s official currency as of 1 January 2026, the Bulgarian tax authorities have issued clarifications on the management of tax and social security obligations during the transition phase.
It has been confirmed that all tax and social security payments must be made exclusively in euro, including during the dual-currency circulation period currently in place until 31 January 2026, as payments to the tax authorities are processed on a cashless basis only.
For reporting purposes, amounts relating to periods up to 31 December 2025 continue to be declared in Bulgarian lev, while amounts relating to subsequent periods are denominated in euro, regardless of the filing date.
Tax liabilities and credits existing at the end of 2025 have been automatically converted into euro in taxpayers’ accounts, in accordance with the applicable conversion rules. Additional guidance has also been provided on the impact of the currency change on electronic services, refunds and the calculation of late-payment interest; the statutory interest rate applicable for the first half of 2026 has been set at 10.15%.
Pending the approval of the 2026 Budget, the income thresholds for social security contribution purposes, currently considered for indicative purposes only, are set at EUR 550.66 (minimum) and EUR 2,111.64 (maximum), subject to possible subsequent changes.