Judicial appeal electricity market prices 2025: what traders and generators must do

Key data

The official prices of the Spanish electricity market for 2025 are being challenged before the Audiencia Nacional. The National Commission for Markets and Competition (CNMC) has published a summons resolution on 15 April 2026 so that all interested parties in the administrative law appeal 4/403/2026 may intervene in the judicial proceedings and defend their positions.

The appeal is directed against the Agreement of 22 January 2026, which published the settlement and the average annual price of the daily and intraday market for 2025. These data are the official reference on which contracts are settled, regulated remuneration is calculated and invoices are issued in the electricity sector. That they are judicially challenged is not a minor matter.

What does this regulation establish?

The CNMC resolution does not resolve the merits of the case: its function is to formally notify interested parties that there is an active administrative law appeal and that they have the right to intervene in the proceedings before the Audiencia Nacional.

The challenged agreement—that of 22 January 2026—published two critical data points for the Spanish electricity sector:

• The settlement of the daily and intraday market for 2025: technical reference reflecting the position of each agent in the market.
• The average annual price of the daily and intraday market for 2025: official figure serving as the basis for settlements, indexed contracts and regulated remuneration.

The appeal challenges the validity or content of those official prices. This means that someone—a market agent, a company or an organization—considers that those data are not correct or that the procedure for setting them was not appropriate.

While the litigation is open, the published prices remain officially valid. But if the Audiencia Nacional rules in favor of the appellant, they could be modified, which would have direct consequences on settlements already made or in progress.

Economic and operational impact

The average annual price of the daily and intraday market is a central reference figure in the electricity sector. Its possible judicial modification affects three major business areas:

Legal uncertainty is the main operational risk at this time. Companies that do not intervene in the appeal will lose the opportunity to defend their position in the proceedings, remaining subject to whatever the Audiencia Nacional decides without having been able to submit arguments.

Who does it affect?

The CNMC expressly summons interested parties in the appeal. In practice, this includes all agents in the Spanish electricity market whose legal or economic situation depends on the average annual price of the daily and intraday market for 2025:

• Electricity trading companies: that have invoiced or settled contracts referenced to the official 2025 price.
• Electricity generation companies: with regulated remuneration or contracts linked to the annual market price.
• Large industrial consumers: with supply contracts indexed to the daily or intraday market.
• Electricity market agents: with positions in the official settlement published in the January 2026 agreement.
• Legal and financial advisors managing contracts or claims in the energy sector.

Practical example

An electricity trader that during 2025 settled contracts with industrial customers referencing the average annual price of the daily market published by the CNMC in the Agreement of 22 January 2026 has direct exposure to the outcome of this appeal.

If the Audiencia Nacional were to rule that the published official price was not correct and order its modification, that trader could be forced to recalculate settlements already issued, issue corrective invoices and face possible claims from its customers for the resulting differences.

By not intervening in the appeal, that trader could not submit arguments or evidence to the court to defend that the original price was correct. It would lose the ability to influence the resolution that, in any case, will affect it economically.

The decision to intervene or not should be made with advice from legal counsel specialized in energy law and administrative litigation, assessing the volume of exposed contracts and the cost of the proceedings.

What should companies do now?

1. Identify economic exposure: review whether the company has contracts, settlements or remuneration calculated on the average annual price of the daily and intraday market for 2025 published in the Agreement of 22 January 2026.
2. Consult with specialized legal counsel: a lawyer with experience in energy law and administrative litigation should assess whether the company qualifies as an interested party in appeal 4/403/2026 and whether it is advisable to intervene.
3. Act within the summons deadline: the resolution was published on 15 April 2026. The deadline to intervene before the Audiencia Nacional is limited. Failing to act in time means losing the right to participate in the proceedings.
4. Evaluate contractual risk: if the official price were modified by judicial resolution, analyze what clauses in existing contracts would regulate that situation and whether there is protection against possible customer claims.
5. Monitor the progress of the appeal: even if the company decides not to intervene, it should follow the evolution of the litigation before the Audiencia Nacional to anticipate the impact of a possible favorable resolution.