← FFCheckWho do I contact?ES
Money · Spain
Updated September 2026

⚡ My energy bill is wrong and the supplier won't fix it — who do I complain to?

Direct answer

First a written complaint to the supplier — they must answer within a set time, and most disputes end here once you ask for the meter readings behind the bill. If they do not solve it, Oficina de consumo de tu comunidad autónoma (consumo.gob.es) is the independent body for energy disputes in Spain: free, and the supplier has to take part. CNMC — Comisión Nacional de los Mercados y la Competencia (cnmc.es) is the regulator that supervises suppliers and takes complaints about practices, not individual bills. Pay the undisputed part meanwhile — that keeps your supply on.

Call firstOficina de consumo de tu comunidad autónoma
Report toCNMC — Comisión Nacional de los Mercados y la Competencia
If that failsOCU

🗣️ What to say

"Contract [number], invoice [number] of [date]. The billed consumption of … kWh does not match my meter reading of … on [date]. I dispute the invoice and ask for a corrected bill within 4 weeks. I will pay the undisputed amount of €… in the meantime."

🪜 Step by step

  1. Read your meterPhoto with the date. Compare with the readings on the bill; estimated readings are marked as such.
  2. Complain in writingTo the supplier's complaints address, with the contract number. Ask for the correction and a written answer.
  3. Pay what is undisputedIt protects you from disconnection and shows good faith.
  4. Go to Oficina de consumo de tu comunidad autónomaAfter the supplier's deadline passes (typically 4–8 weeks) or the answer is a refusal. The procedure is free.
  5. Practices, not bills: CNMC — Comisión Nacional de los Mercados y la CompetenciaUnfair tariff changes, aggressive sales, switching without consent — that is for the regulator.

📇 All contacts

Oficina de consumo de tu comunidad autónomaComplaint and arbitration on utilitiesWhen the supplier does not answer within a month🔗 www.consumo.gob.es/es/consumo/informacion-consumidores
CNMC — Comisión Nacional de los Mercados y la CompetenciaRegulator, supplier practicesSwitching without consent, unfair practices🔗 www.cnmc.es/consumidores
OCUBill check, adviceIf you are not sure the bill is wrong🔗 www.ocu.org

❓ Frequently asked

Can they cut me off during the dispute?

Not for a disputed amount that is with the ombudsman, and never without notice. Pay the undisputed part and say so in writing.

They estimated my consumption for a year

You can demand a bill based on actual readings. Give the reading with a dated photo; the difference must be corrected.

I was switched without agreeing

That is a regulator matter. Contact CNMC — Comisión Nacional de los Mercados y la Competencia and your old supplier; the contract can be reversed.

📎 Sources

Last checked: 2026-09-26

🔎 Common searches

Recognise your own search? The answer above covers all of these.

  • “energy bill too high complaint Spain”
  • “energy ombudsman Spain”
  • “dispute electricity bill”
  • “gas bill wrong what to do”
  • “energy regulator complaint”

🧭 Is this still correct?

We check this information carefully, but phone numbers, websites and rules change — and sometimes we get something wrong. Spotted a mistake or a change? Let us know below.

🔗 Related questions

📦Faulty goods, no refund→⚡Power outage→💳Scammed online→🎯Phishing message→

Your tools for Spain

Before it goes wrongCan I?What is allowed, what is not, which permit you need — with the official source.Energy · SpainElectricity & gasThe rules that protect you as an electricity and gas customer in Spain, and who to contact. Every fact is checked on an official source.Recognise it firstIs dit veilig?Check a phone number, website or message against 47,000 scam dossiers.