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How much does it cost to run a storage heater?
A storage heater costs about 31p an hour to run.
Storage heaters charge overnight on a cheaper off-peak rate, so this page uses an off-peak rate. Change it to match your tariff.
Work out your cost
Find the wattage on the label or rating plate, usually on the back or underneath.
Low, typical and high running costs
Using 7 hours a day.
| Rating | Unit cost | Per week | Per winter (Oct to Mar) | |
|---|---|---|---|---|
| Low | 1,000W | 15p / hour | £7.50 | £194.92 |
| Typical | 2,000W | 31p / hour | £14.99 | £389.84 |
| High | 3,000W | 46p / hour | £22.49 | £584.77 |
How it compares
| Appliance | Typical use | Per day | Per month |
|---|---|---|---|
| Storage heater | 7 hours a day | £2.14 | £65.15 |
| Oil-filled radiator | 4 hours a day | £1.47 | £44.83 |
| Fan heater | 3 hours a day | £1.26 | £38.43 |
| Convector heater | 4 hours a day | £1.18 | £36.03 |
| Halogen heater | 3 hours a day | 95p | £28.82 |
| Infrared panel heater | 5 hours a day | 55p | £16.81 |
| Electric towel rail | 4 hours a day | 47p | £14.41 |
How we work it out
Cost per hour = watts ÷ 1,000 × share of time at full power × price per kWh. For a 2,000W storage heater at 100%: 2,000 ÷ 1,000 × 1 × 15.3p = 31p.
The low, typical and high figures are for models sold in the UK, taken from the sources below. Your own appliance may differ, so check its rating plate or energy label for the most accurate figure.
Sources
Questions
How much electricity does a storage heater use?
Most use between 1,000W and 3,000W. A 2,000W model running at full power uses 2 kWh an hour.
How much does a storage heater cost to run per day?
Used for 7 hours a day it costs about £2.14, based on an off-peak rate of 15.3p per kWh (EDF's average off-peak rate, November 2025).
Where does the electricity price come from?
We use the Ofgem price cap average for Great Britain, paying by Direct Debit: 26.32p per kWh for 1 Oct 2026 to 31 Dec 2026. Electricity rate includes 0% VAT, which applies from 1 October 2026 to 31 March 2027. Storage heater and EV pages use an off-peak rate instead. Your own tariff may be higher or lower, so check your bill and enter your rate in the calculator.