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ACER Finds Croatian Gas Tariff Methodologies Largely In Line, While Finland Has Yet To Address Gaps

Date 15/08/2025

ACER has released two reports assessing whether the proposed reference price methodologies for the Croatian and Finnish natural gas transmission tariffs comply with the EU gas Network Code on Harmonised Transmission Tariff Structures.

The reports are addressed to:

  • the Croatian national energy regulator; and
  • the Finnish natural gas transmission system operator.

What are ACER’s main conclusions?

ACER finds that Croatia’s proposal makes only minor adjustments to the previous well-functioning methodology (last updated in 2019), while Finland’s proposal retains its existing approach (2020) without addressing some of ACER’s earlier recommendations. Both proposed methodologies:

  • Broadly meet the Network Code’s requirements on non-discrimination, volume risk and prevention of cross-border trade distortions.
  • Could be improved in specific aspects. ACER sets out recommendations to be considered before finalising the new tariff methodologies.

Read more about the ACER findings and recommendations.

Access the ACER report on the Croatian gas tariff methodology.

Access the ACER report on the Finnish gas tariff methodology.