The government has published an ordinance in the Diário da República reducing the temporary discount on the Tax on Petroleum Products (Imposto sobre os Produtos Petrolíferos or ISP). The adjustment, effective next week, lowers the discount by 1.9 cents for diesel and 1.8 cents for petrol, reflecting expected market price decreases.
Government adjusts fuel tax discount for next week
Friday, 29 May 2026AI summary
Context & Explainers
The Official Journal (Diário da República) is Portugal's government gazette where laws, decrees and public contracts are formally published and take legal effect. Public‑private partnership approvals and other official notices — like the launch of the Central Algarve Hospital PPP — are published there so residents and businesses can find the authoritative text.
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.
