Articles 20 and 21 of Royal Decree-Law 25/2026, of September 29, which adopts and extends certain measures within the framework of the Comprehensive Response Plan to the Crisis in the Middle East, establish that the tax rate of the Special Tax on Electricity provided for in section 1 of article 99 of Law 38/1992, of December 28, on Special Taxes, may be reduced in the months of November and December 2026 from 5.11269632 percent to 0.5 percent. The reduction of the tax rate in the month of November 2026 will apply if, in the month of September 2026, the CPI for electricity exceeds by more than 15 percent the CPI of the same month of the previous year, according to the information published in October by the National Institute of Statistics.

The reduction in the tax rate in December 2026 will apply if, in October 2026, the electricity CPI exceeds the CPI of the same month of the previous year by more than 15 percent, according to the information published in November by the National Institute of Statistics.

If the aforementioned reductions are applied, the minimum tax levels may not be less than 0.5 euros per megawatt-hour if the electricity is used for professional purposes, or 1 euro per megawatt-hour in all other cases, in accordance with the provisions of Council Directive 2003/96/EC of 27 October 2003.