What is the cheapest electricity company in Spain? How to find the cheapest one for you
Short answer: no electricity company in Spain is the cheapest for everyone. The cheapest one for you is the tariff with the lowest total cost for your contracted power, your usage and your hours, including fixed charges, add-ons and any lock-in. Comparing only the advertised price per kWh is misleading surprisingly often.
Why there is no single answer
Every tariff splits its price differently between power (a fixed daily charge) and energy (what you use). A very cheap kWh can come with expensive power, and vice versa:
- If you use little (a holiday home, a small flat), cheap power matters more than the kWh price.
- If you use a lot (family home, air conditioning, electric car), the kWh price dominates.
- If you use most of it at night or at weekends, a three-band tariff with a cheap off-peak price suits you.
The number to look at: your total cost
To compare properly, work out what each tariff would cost with your real usage: power (kW × price per kW per day × days), energy (kWh in each band × its price), any monthly fees, and taxes (5.11% electricity tax, meter rental and 21% VAT on the mainland and the Balearics; IGIC in the Canary Islands).
A useful shortcut: divide your bill's total before taxes by the kWh used. That is your real average price per kWh, and it is the figure to compare, not the advertised one.
The usual traps
- Welcome prices that rise after a few months. Always ask for the price from month 13.
- Charges not included: some tariffs bill the grid "balancing services" separately, around €0.018/kWh extra.
- Bundled services such as maintenance plans or insurance.
- Lock-in periods (permanencia) with a penalty for leaving early.
- Indexed tariffs that look cheap until the market jumps: on 19 October 2026 the wholesale average hit €215.11/MWh.
Switching is free and there is no power cut
Changing supplier in Spain is purely administrative: same installation, same meter, no interruption. You need the account holder's ID (NIE or passport), the CUPS code from your bill and a Spanish IBAN.
Find yours without spending an afternoon on it
Voltaris does that comparison for you, free and in English: send a photo of your bill and we calculate the total cost of the available tariffs with your real usage, tell you which is cheapest for you and how much you would save per year, with lock-ins and small print spelled out. If switching makes sense we handle it; if your current tariff is already good, we tell you.
Frequently asked questions
What is the cheapest electricity company in Spain?
No supplier is cheapest for everyone: it depends on your contracted power, usage and hours. The cheapest one for you is the tariff with the lowest total cost for your real consumption, including power, energy, fees and lock-in.
How do I compare electricity tariffs in Spain?
Calculate each tariff's total with your kWh per time band and your contracted power, and compare your real average price per kWh: total before taxes divided by kWh used.
Is there a power cut when switching electricity supplier in Spain?
No. Switching is free and administrative: same installation and meter, with no interruption to your supply.
Who compares Spanish electricity tariffs for me in English?
Voltaris, an independent energy advisory based in Torrevieja serving all of Spain, compares tariffs against your real bill for free 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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