Fuel prices in Portugal are set to rise again next week, with simple diesel increasing by about nine cents per litre and 95-octane petrol by about four cents. These forecasts, provided by the National Association of Fuel Retailers (ANAREC), include VAT. Based on current data from the Directorate-General for Energy and Geology (DGEG), the average price of simple 95 petrol is expected to reach 1.95 euros per litre, while simple diesel should reach 2.16 euros per litre from Monday. These figures may still fluctuate based on international oil market trends and individual station pricing. The increases account for a government decree reducing the Tax on Petroleum Products (ISP), with temporary discounts of 8.34 cents per litre for diesel and 4.58 cents for petrol. This follows a week of price drops, but continues the upward trend seen since early March due to geopolitical tensions in the Middle East and market volatility.
Diesel to rise by 9 cents and petrol by 4 cents next week

Context & Explainers
The ISP (Imposto sobre Produtos Petrolíferos e Energéticos) is Portugal's excise tax on petroleum and energy products, charged as a fixed amount per liter on petrol, diesel, and other fuels. It is one of the main components of fuel prices at the pump, alongside VAT and the carbon tax (Taxa de Carbono).
The government can adjust ISP rates — temporarily or permanently — to influence fuel prices. Rate cuts are a common policy tool to ease cost-of-living pressures on drivers and transport businesses, though they also reduce government revenue.
For consumers, the ISP is significant because even small changes in the per-liter rate translate into noticeable differences at the pump, particularly for diesel users and commercial transport operators.
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Other news coverage of this topic
- Filling a 50-litre tank with diesel will now cost more than €100 • Expresso
- War in Iran causes diesel to rise by nine cents and petrol by four next week • Expresso
- Airline tickets soar 20% due to the war • CNN Portugal
- Diesel to rise by 9 cents and petrol by 4 cents next week • Correio da Manhã
- Diesel and petrol prices to rise despite increased tax relief • Observador
- Government will have to take "much more aggressive" measures to mitigate the effects of the energy crisis • CNN Portugal
- Fuel prices rise again: diesel up 8 cents/litre, petrol up 3.5 cents/litre • Expresso
- Government increases discount on fuel tax for diesel and petrol • ECO
- Petrol and diesel prices to rise again next week • RTP Notícias
- Petrol and diesel prices to rise again next week • RTP Notícias
- Fuel prices to rise next week, petrol and diesel discounts to remain • Público











