Meters, readings and estimated bills explained

Terms used

• Distribuidora — The distribuidora is the local network company that owns the lines or pipes and the meter, and reads it.
• Comercializadora — The comercializadora is the supplier that sells you energy and sends your bill.
• Batería de contadores — The batería de contadores is the group of meters for a building, usually in a shared meter room.
• Junta Arbitral de Consumo — The Junta Arbitral de Consumo is the public consumer arbitration board that settles disputes with companies that have joined it.
• OMIC — The OMIC is the town or regional consumer information office that helps with complaints.
• Hoja de reclamaciones — The hoja de reclamaciones is the official complaint form you can ask a business for.

Key rules

• Estimates: A bill may be an estimate only when no real reading is available, and it must say so.
• Your own reading: For water and gas you can send your own reading, and the supplier should correct the next bill.
• Gas inspection: The gas safety inspection every five years needs access to your home.
• Complaints: Complain to the supplier first, then take it to consumer arbitration, a consumer office or the energy regulator.

How each utility is measured

Electricity is the easiest. Almost every home has a smart meter that your local network company (distribuidora) reads remotely, so you never need to read it yourself.

Water is mixed. Some cities have remote-read meters, but many homes still have a mechanical meter that a reader checks in person. Gas is being switched to remote reading, with large parts of the network covered but not all homes. Coverage of water and gas varies by town and by network company, so ask your supplier (comercializadora) or landlord which kind you have.

Where the meter is and who reads it

Water meters are usually in the building's meter room (batería de contadores) or in a street-level box outside. In that case you do not need to be home. If your meter is inside your home, the reader leaves a card asking you to send your own reading.

Gas works the same way. If the meter is inside, you may need to be home or send a reading by card, phone or app.

Gas also has a safety inspection every five years, and that one does need access to your home. Arrange it when the network company contacts you.

When a bill can be an estimate

A supplier may bill an estimate only when a real reading is not available. This happens when the reader cannot get in or a reading fails. The estimate is based on your past consumption, and it must be labelled as an estimate on the bill.

• Electricity: estimates are rare because meters are read remotely. When one happens, the next real reading corrects it.
• Gas: a home should get a real reading at least every six months. Estimates in between are corrected afterwards.
• Water: a real reading should happen at least once a year, or as your region's water rules say. Any difference is adjusted on the next bill. Water rules differ by region and town.

How to correct an estimate

Send your own reading. Read the numbers on the meter, note the date, and send them by phone, the supplier's app or website, your customer area, or the reading card the reader left. Many bills show a window for sending readings, so check yours.

The supplier should use your reading on the next bill and correct the difference. If it does not, complain in writing to its customer service.

For electricity, raise the problem with your supplier. It must check with the network company.

How to dispute a bill

1. Complain to the supplier. Use customer service by phone, web, app, email or in writing. Suppliers generally must answer within one month. A recent customer service law also requires essential service providers to reply quickly and offer a human agent.
2. Escalate if unanswered or unsatisfactory. For electricity and gas, you can go to the consumer arbitration board (Junta Arbitral de Consumo), if the company has joined it. You can also go to your regional or town consumer office (OMIC) or the energy regulator.
3. Water disputes: go to the local water company or town hall first, then your regional consumer body.
4. Last resort: you can ask for the official complaint form (hoja de reclamaciones) at the supplier, and the courts remain open.

Keep copies of every message and your meter readings with dates. The timeline and checklist below show the order of steps, and the FAQ covers common questions.

Timeline and deadlines

• Real gas meter reading for homes: at least every six months

• Difference from an estimate corrected on your bill: on the next bill after a real reading

• Send your own reading to the supplier: within the window stated on your bill

• Supplier answers your complaint: generally within one month of your claim

• Take an unresolved complaint to the consumer arbitration board, consumer office or energy regulator: after the supplier's reply or if it does not reply

Checklist

• Check your bill for a note that it is an estimate.

• Find your water or gas meter in the meter room, a street-level box or inside your home.

• Look at your next bill to confirm the estimate was corrected.

• Complain in writing to the supplier's customer service if the estimate is not corrected.

• Arrange access to your home for the gas safety inspection, which happens every five years.

Spanish utility bill terms glossary

Bill and contract terms, and who to ask

• Your supplier (comercializadora): Ask about the titular (the contract holder, who is responsible for payment) and the potencia contratada (the maximum power in kW you may use, charged as a fixed amount). To change either, say: "Quiero cambiar el titular" or "Quiero cambiar la potencia contratada".

• Your supplier (comercializadora): Ask about the bill lines. Término de potencia is the fixed part for your contracted power. Término de energía is the part charged on the kWh you use. Peajes y cargos are regulated charges for the networks and system costs. Also look for the electricity tax, alquiler de equipos (meter rental) and IVA (VAT). Say: "No entiendo esta línea de la factura".

• Your supplier (comercializadora): Give your CUPS when you call. It is the unique code of your supply point: ES, then 16 digits and 2 letters (20 or 22 characters, sometimes with a short suffix such as 0F). Find it in the datos del contrato or datos del suministro section of the bill. It stays the same if you change supplier.

• Your supplier (comercializadora): For altas (new contracts) and bajas (cancellations), say: "Quiero dar de alta el suministro" or "Quiero dar de baja el suministro". For complaints, say: "Quiero presentar una reclamación" and ask for a reference number.

• Your local network company (distribuidora): Call the distribuidora, which owns the local network and the meter, for averías (faults) and technical work. Say: "No tengo luz" or "Quiero comunicar una avería". Its contact details are on your bill.

• Your supplier (comercializadora): For lecturas (meter readings), say: "Quiero dar la lectura del contador" or "Mi factura es estimada, ¿puede corregirla con mi lectura real?".

Frequently asked questions

Does my home have a smart meter?

Yes, if you have electricity, because almost every Spanish home has a smart meter that the network company reads remotely. Water meters are often still mechanical outside big cities such as Barcelona, Madrid and Valencia. Gas is being converted in stages, so ask your gas network company if you are unsure.

How often must my gas or water meter be read for real?

Gas must have a real reading at least every six months for homes, and water at least once a year or as your region's water rules say. Between readings the supplier may bill an estimate, and any difference is corrected on the next bill. Estimates must be labelled as such.

Do I have to be home when someone reads my water or gas meter?

No, usually not for water, because meters tend to be in the building's meter room or a street-level box.

What can I do if my supplier refuses to correct an estimated bill?

Make a formal complaint to the supplier's customer service, which generally has one month to reply. If that fails, go to the consumer arbitration board or your regional or town consumer office (OMIC). For electricity and gas you can also go to the energy regulator, the CNMC.