The increase in tariffs by 4% set to take effect from October 1, 2025, to September 30, 2026, will impact approximately 440,000 consumers who, as of the end of February 2025, were still on the regulated market.
With this proposal, which must be approved by June 1 by the Tariff Council and other bodies, “the impact on the natural gas bill (including fees and taxes), for the most representative consumption profiles (a couple without children and a couple with two children), will result in an increase of between 0.63 and 0.87 euros on the monthly bill,” states a release from the Energy Services Regulatory Authority (ERSE).
According to the regulator’s calculations, the sales prices to end clients in the regulated market will see, over the last five years, an average annual increase of 5.1% in the final price.
In the free market, which has 1.1 million clients, the sales prices to end clients vary among suppliers and depend on the commercial offer contracted by the client.
However, the final price of the natural gas supply invoice, both in the regulated and the free market, includes the amount related to the network access tariffs, regulated by ERSE, which reflect the collective use of the network infrastructures.
For low-pressure consumers, including residential customers, the variation in network access tariffs will result in increases of 0.30 euro cents per kilowatt-hour (cEuro/kWh).
For non-residential consumers, connected at high pressure (industry), medium pressure, and low pressure, the variation in network access tariffs is estimated to increase between 0.03 and 0.14 euro cents per kilowatt-hour (cEuro/kWh), the regulator adds.
Regarding the final price variation for consumers in the liberalized market, this is contingent not only on the network access tariffs but also on the energy component acquired by each supplier in international markets, plus the respective commercial margin.
“Clients with social tariffs, in both the regulated and free markets, continue to benefit from a 31.2% discount, calculated by reference to the sales prices to end clients in the regulated market,” notes ERSE.
