Why is my electricity bill so high in Spain? The 9 most common causes and how to check them
Short answer: it is rarely because you used far more electricity. The usual culprits are a catch-up bill after estimated readings, the end of a promotional price, an indexed tariff in an expensive month, more days billed than usual, or contracted power and add-ons you have paid for years without needing them. Here is how to check each one.
In five minutes: take the expensive bill and the previous one and compare four numbers: the days billed, the kWh used, the price per kWh and whether the meter reading is real or estimated (real or estimada). One of them almost always explains the jump.
1. A catch-up bill after estimated readings
If the network operator could not read your meter for several months, the supplier bills an estimated consumption. When a real reading finally arrives, everything not billed before is charged at once, in a line called regularización. It is the number one cause of "impossible" bills, and very common in holiday homes.
2. A promotion has ended
Many offers include a discount or welcome price for the first 6 or 12 months. When it ends, the price per kWh goes back to the standard rate, often without a clear warning. Compare this bill's kWh price with last year's.
3. You are on an indexed tariff and the market spiked
With an indexed tariff (or the regulated PVPC tariff), the price changes every hour with the wholesale market. A real example: on Monday 19 October 2026 the average market price reached €215.11/MWh, the highest of the year, with €299/MWh at 9 pm. If your bill says PVPC, indexado or precio variable, your price moves month to month.
4. The bill covers more days than usual
Spanish bills are not always 30 days. A 35 or 40-day bill naturally costs more, especially the fixed power charge. Divide the total by the days billed and compare the cost per day.
5. You pay for more power than you use
Contracted power (potencia contratada) is charged every single day, whether you use electricity or not. Each extra kW costs roughly €40 to €50 a year. Many homes inherited 5.75 or 6.9 kW from a previous owner and never go above 3.5 kW.
6. Add-ons you don't remember signing up for
Maintenance plans, appliance insurance or "emergency assistance" are often added to the electricity contract, typically €5 to €12 a month. Check every line that is not energy, power, taxes or meter rental.
7. You use electricity at the most expensive hours
The standard household tariff (2.0TD) has three time bands: peak (punta, 10 am–2 pm and 6–10 pm on weekdays), standard (llano) and off-peak (valle, midnight–8 am and all weekend). Running the washing machine, oven or EV charger at peak makes a big difference.
8. Heating or air conditioning season
A 2,000 W electric heater on for 5 hours a day uses 300 kWh a month. That is real consumption, but a better-matched tariff or different hours can still lower what you pay for it.
9. Something is using power without you knowing
A water heater with a faulty element, a pool pump on the wrong timer or an old fridge can use dozens of kWh a month. Switch everything off, check whether the meter still moves, and turn things back on one by one.
Is the bill simply wrong?
It happens: wrong readings, a power level that isn't yours, services you never asked for. You can file a complaint with the supplier in writing, and go to consumer services if they don't resolve it.
The quickest way to find out
Voltaris reviews your bill for free, in English: within 24 working hours we tell you which of these causes applies, whether there is an error worth claiming, and how much you would pay with a tariff matched to your real use. You pay nothing, and nothing changes unless it saves you money.
Frequently asked questions
Why has my electricity bill in Spain doubled?
Most often it is a catch-up bill (regularización) after months of estimated readings. It can also be the end of a promotional price, an indexed tariff in an expensive month or a bill covering more days than usual.
How do I know if my Spanish electricity bill is estimated?
The bill says «estimada» or «real» next to the meter reading. Several estimated bills in a row usually mean the next real reading will bring a catch-up charge.
How much does contracted power cost in Spain?
Roughly €40 to €50 a year per kW on the household 2.0TD tariff, charged every day whether you use electricity or not.
Who can review my Spanish electricity bill in English for free?
Voltaris, an independent energy advisory based in Torrevieja that serves all of Spain, reviews bills for free in English and replies within 24 working hours.
Want to know if you are overpaying?
Send us a photo of your bill. Within 24 hours we tell you exactly how much you can save. Free, in English, no obligation.
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