Fuel prices in mainland Portugal are expected to increase next week due to rising international oil costs. To mitigate the impact, the government will maintain temporary discounts on the tax on petroleum products (Imposto sobre os Produtos Petrolíferos or ISP) for road diesel and unleaded petrol.
Fuel prices set to rise again next week
Friday, 3 April 2026AI summary
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.
5 sources
- Fuel prices to rise again next weekCNN Portugal ·
- Fuel prices to rise next week, petrol and diesel discounts to remainPúblico ·
- Petrol and diesel prices to rise again next weekRTP Notícias ·
- Government increases discount on fuel tax for diesel and petrolECO ·
- Fuel prices rise again: diesel up 8 cents/litre, petrol up 3.5 cents/litreExpresso ·
