Key data
| Regulation | Resolution of April 6, 2026, CNMC — Summons for administrative litigation appeal 4/401/2026 |
|---|---|
| BOE Publication | April 15, 2026 (BOE-A-2026-8363) |
| Entry into force | Not specified |
| Challenged agreement | CNMC Agreement of January 22, 2026 — average annual price daily and intraday market 2025 |
| Judicial body | National Court |
| Affected parties | Companies and agents of the Spanish electricity market, retailers and generators |
| Category | Energy |
| Reference year | 2025 |
The official prices of the Spanish electricity market for 2025 are being challenged in court. The CNMC published on April 15, 2026 a summons resolution addressed to interested parties in the administrative litigation appeal 4/401/2026, filed before the National Court against the Agreement of January 22, 2026.
That agreement published the apportionment and the average annual price of the daily and intraday market for the year 2025, data that serves as the basis for settling contracts, calculating regulated remuneration, and closing billings in the electricity sector. Anyone with legitimate interest in the outcome of this appeal must act before the deadline for appearing in the proceedings expires.
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 an administrative litigation appeal is in progress and that they have the right to appear in the judicial proceedings to defend their position.
The object of the appeal is the Agreement of January 22, 2026, through which the CNMC published two key data points for the electricity sector:
- The apportionment of the daily and intraday market for 2025: technical reference that reflects the aggregated behavior of the market throughout the year.
- The average annual price of the daily and intraday market for 2025: official figure used as the basis for settling contracts, calculating regulated remuneration, and billing between market agents.
The appeal challenges the validity or content of those official prices. Depending on the judicial outcome, these values could be confirmed, modified, or annulled, with direct consequences for any contract or settlement that uses them as a reference.
Economic and operational impact
The average annual price of the electricity market is not a minor statistical figure: it is the contractual and regulatory reference on which multiple economic obligations in the Spanish energy sector are based.
A potential judicial modification or annulment of these prices could generate the following impacts:
- Revision of billings: supply or energy purchase contracts indexed to the average annual price of 2025 could require resettlements.
- Adjustment of regulated remuneration: certain generation facilities with regulated remuneration regime use the market price as a calculation variable. A change in that price directly affects recognized income.
- Secondary contractual disputes: if the official price changes, disputes may arise between parties that closed contracts using that value as a reference.
- Uncertainty in financial planning: while the appeal is in progress, companies with exposure to these prices must consider alternative scenarios in their projections.
Failing to appear in the proceedings when you have legitimate interest can mean losing the ability to influence the outcome and being bound by a judgment without having been able to argue your case.
Who does it affect?
- Electricity retailers with contracts indexed to the average annual price of the daily and intraday market for 2025.
- Generator companies whose regulated remuneration or settlements are linked to the official prices published by the CNMC for 2025.
- Agents of the Spanish electricity market that participate in the daily or intraday market and have open positions or pending settlements referenced to the 2025 fiscal year.
- Large industrial consumers with indexed price supply contracts that use the average annual price as a reference for adjustment or review.
- Legal and financial advisors in the energy sector who must evaluate the regulatory risk of their clients.
Practical example
An electricity retailer that in 2025 signed supply contracts with large industrial clients at a variable price referenced to the average annual price of the daily and intraday market has its final 2025 settlements calculated on the value published in the Agreement of January 22, 2026.
If that agreement is successfully challenged and the official price is modified upward or downward, the retailer could be forced to resettle those contracts with its clients, generating differences to collect or refund. Depending on the volume of contracted energy, even small variations in the average annual price translate into significant amounts.
In this scenario, not appearing in appeal 4/401/2026 would mean that the retailer has not been able to defend its position on what price it considers correct, being bound by the judgment without having argued its case.
What should companies do now?
- Identify if you have exposure: review whether any of your contracts, settlements, or 2025 remuneration is referenced to the average annual price of the daily and intraday market published by the CNMC in the Agreement of January 22, 2026.
- Consult the full text of the resolution: access the resolution BOE-A-2026-8363 to know the exact deadline for appearing and the procedural requirements.
- Contact specialized legal advice in energy law and administrative litigation: the decision to appear or not in appeal 4/401/2026 before the National Court has procedural and economic implications that require expert analysis.
- Evaluate the economic risk: quantify the potential impact on your settlements or remuneration if the official 2025 price were modified. This will determine whether the cost of appearing in the proceedings is justified.
- Do not miss the deadline: deadlines in administrative litigation are preclusory. Once the deadline for appearing expires, you will not be able to join the proceedings as an interested party.
Frequently asked questions
What does the administrative litigation appeal 4/401/2026 challenge?
The appeal challenges the Agreement of January 22, 2026 of the CNMC, by which the apportionment and average annual price of the daily and intraday market for the year 2025 were published. These are the official prices used to settle contracts and calculate remuneration in the electricity sector.
Which companies should appear in the appeal before the National Court?
Energy sector companies with contracts linked to the official electricity market prices for 2025 —such as retailers, generators, and market agents— should assess whether they have legitimate interest in the proceedings and appear before the established deadline expires.
What consequences can this appeal have on indexed contracts?
If the appeal succeeds and the official prices are modified or annulled, it could affect billings, settlements of indexed contracts, and regulated remuneration calculated based on the average annual price of the market.