The impact on the monthly invoice will be between 63 and 87 cents for the most representative consumer typologies. In the last five years, the final price has recorded an average annual variation of 5.1%. The free market, with 1.1 million customers, will have variable prices according to traders.
The energy sector regulator (ERSE) proposed an increase of 4% in the price of natural gas from October 1, which represents increases between 63 to 87 cents for the two typologies of most representative domestic clients.
The rise of tariffs by 4% to be in force between October 1, 2025 and September 30, 2026 will cover the approximately 440,000 consumers who remained in late February 2025 in the regulated market.
With this proposal, which will have to be approved by June 1 by the Tariff Council and other entities, “the impact on the natural gas invoice (including rates and taxes), for the most representative consumer typologies (coupleless couple and couple with two children), translates into an increase between 0.63 and 0.87 euros on monthly invoice”, details in a statement regulating energy services (ERSE).
According to the regulator’s accounts, sales prices to final clients in the regulated market will record, in the last five years, an average annual variation of another 5.1% in the final price.
Free Market with more than one million customers
In the free market, which adds 1.1 million customers, sales prices to end customers vary between traders and depend on the commercial offer contractualized by the customer.
However, the final price of the natural gas supply invoice, both in the regulated and free market, includes the amount related to network access fares, regulated by ERSE, which reflect the collective use of network infrastructure.
In the case of low pressure consumers, which include domestic consumers, the variation of network access fares will imply increases of 0.30 cents of euro by kilowatt-hour (Ceuro/KWh).
For non-domestic consumers, linked at high pressure (industry), medium pressure and low pressure, variation of network access rates is estimated in increases between 0.03 and 0.14 cents from euro per kilowatt-hour (ceuro/kWh), adds the regulator.
Regarding the variation in the final price of consumers in a liberalized market, in addition to network access rates, it is also dependent on the energy component acquired by each trader in international markets, plus their marketing margin.
“Customers with social tariffs, both in the regulated and free market, continue to enjoy a 31.2%discount, calculated by reference to sales prices to final customers in the regulated market,” says Erse.
