Articles 12 and 13 of Royal Decree-Law 18/2026, of June 29, which adopts 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, will be able to to be reduced in the months of August and September 2026 5.11269632 percent to 0.5 percent.

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

The reduction of the tax rate in the month of September 2026 It will apply if in July 2026 the electricity CPI exceeds by more than 15 percent the CPI of the same month of the previous year, according to the information published in July 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.

Additionally, Articles 10 and 11 of Royal Decree-Law 18/2026, of June 29, establish, for the months of August and September 2026, reductions in the VAT tax rate on certain deliveries, imports and intra-community acquisitions of electricity that may be applied according to the CPI of electricity.