Bulgaria

Bulgaria is a member of both the EU and NATO, located on the Black Sea in south-east Europe with a population of approximately 6.5 million. It is an unusual case in the Russia-Ukraine sanctions framework: despite being a NATO and EU member, Bulgaria has deep energy dependencies on Russia that complicate its alignment with Western pressure. The Lukoil-owned Neftochim Burgas refinery — Bulgaria's only oil refinery — processes Russian Urals Crude and supplies much of the country's fuel. When Lukoil was redesignated onto the US SDN list on 16 April 2026, OFAC issued a separate operational exemption specifically to prevent immediate fuel supply disruption in Bulgaria.

Bulgaria receives Russian natural gas via the TurkStream pipeline and has historically been a softer voice on Russia within EU councils. The country elected a pro-EU government in 2023 and has gradually moved to reduce Russian energy dependence, but structural barriers — pipeline infrastructure, refinery specification, contract commitments — have slowed the transition. Bulgaria is also on the eastern flank of NATO and has contributed military training and modest equipment transfers to Ukraine.

The Neftochim exemption illustrates the sanctions design problem: the most Russia-exposed EU member states are also among the most vulnerable to immediate economic harm from maximal sanctions. Western policy has so far managed this through carve-outs and extended timelines rather than forcing immediate disruption.