What Time is Electricity Cheapest in the UK?
Electricity prices in the UK follow predictable patterns based on demand. Understanding these patterns helps you reduce your energy bills.
This guide explains when electricity costs less and how to take advantage of cheaper rates.
Quick answer: When is electricity cheapest?
Cheapest: 11pm–7am
Overnight rates can be 50% cheaper
Most expensive: 4pm–9pm
Peak demand = highest prices
Check your region's energy mix before deciding when to use power
View live UK carbon intensity data
Why does electricity price change?
Electricity prices reflect supply and demand. When millions of people are cooking dinner and watching TV (4pm–9pm), demand peaks and prices rise.
When most people are asleep (overnight), demand drops and electricity becomes cheaper. This is when you should check the best time to use electricity.
Cheapest electricity times by tariff type
Standard tariff
Fixed rate all day, but usage still affects overall grid costs. Best to avoid peak hours for environmental reasons.
Typical rate: 22–28p/kWh
Economy 7 / Economy 10
7 or 10 hours of cheap electricity, usually overnight. Perfect for storage heaters and hot water.
Off-peak rate: 10–15p/kWh
Octopus Agile / Variable tariffs
Prices change every 30 minutes. Can be extremely cheap overnight or during high renewable generation.
Off-peak rate: 5–15p/kWh | See Agile best times
How to benefit from cheaper electricity
The easiest way to save is to shift your high-energy activities to off-peak hours. Learn when to run appliances for maximum savings.
- Use washing machine and dishwasher timers
- Charge EVs and devices overnight
- Run tumble dryers after 9pm
- Pre-heat your home before peak hours
- Use a smart meter to track usage
Smart meters make it easier
A smart meter shows your real-time energy usage and costs. This makes it easy to see when you are using the most electricity and adjust your habits.
Many energy suppliers offer apps that show your half-hourly usage and help you identify savings opportunities.
You could be overpaying for energy
Based on your usage and location, you may be able to save £100–£400/year
Start Saving on Your Energy Bills Today
- Find the cheapest times to use electricity
- Get alerts when energy is cheapest
- Save £200–£400 per year