Gas transmission system operators from Bulgaria, Greece, Romania, Moldova, and Ukraine have reached an agreement with the European Commission on a new tariff structure for the gas route running from Greece toward Ukraine. The move is aimed at strengthening the corridor’s commercial attractiveness while also reinforcing regional energy security.
The agreement is designed to improve the competitiveness of the so-called Vertical Gas Corridor, a strategic route intended to enable gas flows from south to Southeast and Central Europe. According to Greek operator DESFA, the revised tariff model will come into effect in October and has been developed in line with European Union regulations.
The corridor initiative was originally launched in 2016 by Greece, Bulgaria, Romania, and Hungary, with the goal of building infrastructure to support bidirectional gas transmission between their systems. Moldova and Ukraine joined the initiative in 2024, expanding its strategic role as an alternative supply route and strengthening its relevance in the region’s energy framework.
Under the newly agreed commercial framework, participating operators will introduce a wider range of capacity booking products for the first time. Starting with the 2026–2027 gas year, market participants will be able to reserve transport capacity on a daily, monthly, quarterly, and annual basis, offering greater flexibility for traders and suppliers.
Officials emphasize that the new tariff design is intended to make the corridor a more flexible and attractive option at a time when Europe is focused on diversifying supply routes and reducing exposure to geopolitical and supply risks. The enhanced structure is expected to support more dynamic market participation and improved utilization of infrastructure.
To ensure continuity during the transition, operators will seek approval from national regulators to maintain existing transport products until October 2026. This interim measure is aimed at safeguarding Ukraine’s supply security while the new system is gradually implemented.
The agreement comes as Europe continues to strengthen its south-to-north gas infrastructure and expand access to alternative sources. The Vertical Gas Corridor is increasingly viewed as a key component of the continent’s evolving gas architecture and long-term energy strategy.
