Running-cost calculator
How much does an electric boiler cost to run in Spain?
An electric central-heating boiler draws 6,000 to 14,000 watts when it fires, cycling on and off with the thermostat. It's uncommon on the Spanish coast — most homes there heat with reverse-cycle air-con or gas — but where one is installed, it's a heavy load, and winter running costs depend enormously on how well the home is insulated. A reverse-cycle heat pump delivers far more heat per unit of electricity. Set the hours to the boiler's actual daily firing time.
Electric boiler cost calculator tool
Spain average, all-in. Your exact rate is on your bill.
Direct electric heating is expensive — a reverse-cycle heat pump delivers about 3x the heat per unit of electricity.
Frequently asked questions
How much does an electric boiler cost to run in Spain?
A lot when it runs: an 8 kW boiler firing 2 hours a day uses about 16 kWh — roughly €3 a day, or €90 a month — at an all-in rate near €0.19/kWh. Insulation changes this drastically.
Is an electric boiler cheaper than a heat pump?
No. A reverse-cycle heat pump delivers around three times the heat per unit of electricity, so for regular heating it's far cheaper to run.
Our picks to cut this cost
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Water-heater timer
Heats the tank in your cheapest tariff hours and keeps it off the rest of the day.
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Tank insulation jacket
Cuts standby heat loss, so the element switches on less often.
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Whole-home energy monitor
Shows your live kW draw, so you can see if your contracted power is oversized.
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Related reading
Why Spanish houses are so cold — and how to heat them
Built to keep summer heat out, not winter heat in. Why 17.5% of people in Spain can't keep warm, what 18°C really means for your health, and the cheapest way to heat — probably already on your wall.
11 min
Why your potencia contratada is probably wrong
The €240 mistake hiding in 9 out of 10 Costa Blanca electricity bills — and what 2026's price changes mean for your bill.
9 min
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