In order to mitigate the effects of the Middle East Crisis on the increase in energy product prices, various reductions in the tax rates of the Hydrocarbons Tax are approved for the months of July, August and September 2026. These price reductions affect, among other products, unleaded gasoline and diesel fuels (the most widely used).

The planned price reductions for gasoline and diesel in August 2026 will increase if the CPI for these products in June 2026 exceeds the CPI for the same month of the previous year by more than 15 percent.

Meanwhile, the planned price reductions for September 2026 will increase if the CPI for these products in July 2026 exceeds the CPI for the same month of the previous year by more than 15 percent. A larger increase is expected this month when the CPI for these products in July 2026 does not exceed the CPI of the same month of the previous year by more than 15 percent, but does exceed it in June 2026.

Regarding the partial refund of the Hydrocarbons Tax for diesel fuel for professional use, in accordance with Article 8 of Royal Decree-Law 18/2026, from July 1, 2026 until September 30, 2026, the refund rate regulated in Article 52 bis.6 of Law 38/1992, of December 28, on Special Taxes, will be zero euros.

With regard to the partial refund of the Hydrocarbons Tax for diesel used in agriculture and livestock farming, in accordance with Article 9 of Royal Decree-Law 18/2026, the amount of the quotas to be refunded of the Hydrocarbons Tax for diesel actually used in agriculture, including horticulture, livestock and forestry, regulated in Article 52 ter b) of Law 38/1992, of December 28, on Special Taxes, will be 6.93 euros for every 1,000 liters of diesel acquired during the month of July 2026, 25.86 euros for every 1,000 liters of diesel acquired during the month of August 2026, and 44.78 euros for every 1,000 liters of diesel acquired during the month of September 2026.

In August 2026, the refund rate will be 0 euros per thousand liters if the tax rate for diesel in section 1.4 for that same month amounts to 21 euros per thousand liters (17.09 + 3.91) depending on the evolution of the CPI.

For its part, in September 2026 the refund rate will be 0 euros per thousand liters if the tax rate for diesel in section 1.4 for that same month amounts to 21 euros per thousand liters (17.09 + 3.91) depending on the evolution of the CPI.

All information related to the modifications in the regulations governing the Hydrocarbons Tax can be found at the following link: Tax Agency: Hydrocarbons Tax - Tax measures to combat the energy crisis stemming from...