Portugal raises regulated gas tariffs by 6.4% and electricity by 2.7% on 1 October

Tariff increases take effect

Energy tariffs for regulated household consumers in Portugal increased on 1 October 2026. The Energy Services Regulatory Authority (ERSE) established a 6.4% rise for regulated natural gas and a 2.7% rise for regulated electricity. The natural gas adjustment applies throughout the 2026–2027 gas year, which runs from 1 October 2026 through 30 September 2027. Over the preceding five-year period, regulated retail natural gas prices have posted an average annual increase of 5.3%.

Household financial impact

The revised electricity tariff affects roughly 779,000 regulated market consumers, representing approximately 4.6% of national power consumption. According to regulatory simulations, a two-person household without children with a 3.45 kVA contracted power level pays an average of €37.77 per month, an increase of €0.95 compared to September. A four-person household with a 6.9 kVA contract pays an average of €97.73 per month, reflecting an increase of €2.70.

In the regulated natural gas segment, the changes apply to between 431,000 and 437,000 customers. A two-person household in the first consumption bracket pays an average of €17.38 per month, an increase of €0.91. A family with two children in the second consumption tier sees monthly costs rise to €32.53, an increase of €1.62. Vulnerable households eligible for the social tariff maintain a state-guaranteed 38.2% discount on their natural gas bills.

Free market exposure and network access

The regulated tariff adjustments also interact with Portugal's liberalized energy market, where more than 1 million natural gas consumers are registered. Free-market gas customers face estimated average price increases of approximately 2.3%. This spillover stems from an increase in regulated network access tariffs, which ERSE applies uniformly to all network users to account for shifts in gas demand and infrastructure investment levels.

While regulated tariffs are fixed by the authority, private retailers in the free market determine their own commercial retail pricing based on corporate procurement strategies. ERSE noted that some free-market suppliers may implement price adjustments in October to coincide with the opening of the new gas year.

Geopolitical drivers and market outlook

ERSE attributed the higher acquisition costs incurred by the Supplier of Last Resort (CUR) primarily to wholesale market turbulence linked to the war between Iran and the United States and tensions near the Strait of Hormuz. Baseline gas pricing in Portugal also remains linked to long-term take-or-pay procurement agreements established between Galp and Nigeria prior to market liberalization.

The energy regulator noted that geopolitical developments continue to complicate price modeling.

Any forecast drawn up at this time is thus subject to a high level of uncertainty.

Environment and Energy Minister Maria da Graça Carvalho stated that Portugal is tracking international trends and indicated that the government will design policy measures based on price developments. ERSE stated that it will monitor market conditions and geopolitical developments to assess whether existing regulatory mechanisms require updating gas acquisition forecasts.