New ISP Tax Rates for Petrol and Diesel in Madeira from 16 November 2026

The ISP tax rates on petroleum and energy products applicable to petrol and diesel in the Autonomous Region of Madeira change from 16 November 2026, under Portaria No. 636/2026, published in the Jornal Oficial on 3 November. The decree updates three unit rates and forms part of the gradual unwinding of the mitigation measures the Regional Government had applied to fuel prices.

What changes#

The portaria amends points 1, 3 and 7 of Portaria No. 10/2015, of 12 January, which sets the ISP rates to be applied in the Region, as subsequently amended. The new values replace those contained in Portaria No. 624/2026, of 5 November, and are as follows:

• Petrol with a lead content equal to or below 0.013 per litre, classified under CN codes 27101141 to 27101149 (unleaded petrol IO95, according to the preamble of the decree): 502.73 EUR per 1000 litres.
• Diesel, classified under CN codes 27101941 to 27101949: 339.80 EUR per 1000 litres.
• Coloured and marked diesel, classified under CN codes 27101941 to 27101949: 91.32 EUR per 1000 litres.

The remaining paragraphs of Article 1 of Portaria No. 10/2015 are not changed. The decree enters into force the day after its publication, but only takes effect on 16 November 2026.

Who is covered#

The rates apply to products with the indicated codes sold in the Region. The preamble explains that the Regional Government seeks a balance between protecting households and businesses from the impact of rising fuel prices and encouraging more sustainable consumption patterns. The text does not detail the authorised uses of coloured and marked diesel, whose rate is the lowest of the three.

Background#

The ISP is the tax levied on fuels and energy, and its rates are set by portaria of the regional secretaries. Portaria No. 636/2026 is based on Article 95 of the Excise Duties Code, approved by Decree-Law No. 73/2010, of 21 June, which establishes the permitted ranges of variation for ISP rates applicable in the Region. A portaria is a government instrument, here of regional scope, published in the Jornal Oficial, Madeira's official gazette.

The preamble also cites Portaria No. 25/2022, of 26 January, which adapts the formula for calculating maximum retail prices for liquid fuels in the Region, as amended by Portaria No. 166/2026, of 10 April, and the recommendation addressed to Member States on fuel prices.

What the decree does not state#

The text does not refer to the previous rates in force in the Region, so the portaria alone does not show whether the final fuel price will fall or rise compared with the previous period. It also does not set retail selling prices, which result from the formula in Portaria No. 25/2022 and other market factors. To compare the values, it is necessary to consult Portaria No. 624/2026.