MARKETS 2025
Ancillary services
Information based on provisional data as of January 2026
The impact of ancillary services on the average final energy price was €15.78/MWh, the highest figure since records began. This increase represents a very significant leap compared with the €11.37/MWh recorded in 2024, which confirms a clear upward trend.
The share of this component in the final average price stood at around 18.9%, rising above typical levels.
The impact of ancillary services is greater in the months with a higher percentage of renewable energy, which means that the energy scheduled for security is higher.
Impact of the ancillary services on the final price
In 2025, the cost of ancillary services amounted to €3.812 billion, representing a 43% increase compared to the previous year. The cost of technical restrictions increased by 63%.
Cost of ancillary services in €M
The energy used in ancillary services recorded very significant increases compared to the previous year, confirming the upward trend observed in recent years. Overall, the total volume managed increased by 28.9% compared to 2024. Energy scheduled for system security purposes recorded the strongest relative increase among all components, rising by 47.1% year on year, mainly due to the sharp increase in technical restrictions in the PDBF (63%). The balancing energy used has increased by 0.9%, mainly as a result of the increase in tertiary regulation energy and to a lesser extent, of replacement reserves. There was a decrease in secondary and IGCC regulation energy.
The energy volume due to technical restrictions to the PDBF represents 54.8% of the total ancillary services, higher than the 43.3% it represented last year. The total volume of energy scheduled for security purposes amounts to 69.2%.
Energy requirements covered by ancillary services
Virtually all weighted average prices of system ancillary services in the Peninsula were higher than those of the previous year on the upward side, except for upward technical restrictions in phase II, which were lower. On the downward side, about half of the prices were higher, while the other half were lower.
Average weighted prices of ancillary services in the peninsular electricity system
Replacement reserves: The RR-type balancing energy service has a single price. The value represented in the table corresponds to the weighted average price according to the direction needed by the Spanish Electricity System.
Electricity markets
Intraday market
Electricity markets
Replacement reserves markets