We have updated Kpler European Gas' transmission data for the 2026-2027 gas year immediately following transmission system operator (TSO) publishing. The dataset can now be accessed within both the terminal and API.
What we have updated:
• Tariff data for the GY26/27 gas year (October 2026 - September 2027), refreshed across covered European gas market areas for all capacity products;
• Data is sourced from the most recent publications by European TSO and regulatory bodies.
General pattern:
The majority of markets are seeing moderate tariff increases. Germany, Czechia, Netherlands (GTS), Italy, France, Slovakia, Slovenia, Austria, UK, and Greece (DESFA) all posted increases on entry and/or exit, generally in the range of +3% to +19%. On the other side, Denmark, Moldova, Poland, Romania, and Bulgaria recorded reductions.
Markets with no tariff change:
The following markets have confirmed unchanged tariffs for GY26/27: Ukraine, Spain, and Netherlands (BBL).
Markets with no updated GY26/27 tariffs published:
The following markets have not yet published GY26/27 tariff updates (current GY25/26 tariffs are being used as a working assumption for evaluation purposes): Hungary, Bulgaria (ICGB), and Greece (TAP).
Revision History
19 June 2026: Following our previous communication on GY26/27 interconnection tariffs, we would also like to note Hungary's newly published tariffs and two markets omitted from the original communication.
Hungary (FGSZ): entry tariffs down −9.8% uniformly across all 6 interconnection points; exit effectively flat at −0.1%.
BeLux H: modest uniform increase of +3.1% on both entry and exit, in line with the broader European trend.
BeLux L: entry +3.1%, in line with BeLux H. Exit up +88.3%, driven by a sharp increase on Blaregnies L — worth noting when modelling L-gas exit flows.
INT: no change, 0% delta on both directions.