
With the cost of living crisis and soaring energy prices, many people in the UK are looking for ways to save money on their utility bills. One way to do this is to take advantage of off-peak electricity rates, which are typically during the night, weekends, and holidays. During these times, there is less demand for electricity, so energy companies can offer lower rates. However, to benefit from these reduced rates, you must be on a time-of-use tariff, such as Economy 7 or Economy 10, which offers cheaper rates during specific off-peak hours.
| Characteristics | Values |
|---|---|
| Does electricity cost less at night in the UK? | Yes, electricity can be cheaper to use at night. However, most energy suppliers charge an identical rate for electricity use on a 24/7 basis. |
| Peak hours | Peak hours are usually during the daytime and evening, between 8 am and 10 pm. |
| Off-peak hours | Off-peak hours are usually between 10 pm and 8 am. However, this may vary from supplier to supplier, as there is no set definition for off-peak hours in the UK. |
| Economy 7 tariff | Economy 7 tariff provides cheaper electricity during 7 hours of the night when demand is low. |
| Economy 10 tariff | Economy 10 tariff offers an extended off-peak run time, but it is less widely available for businesses. |
| Benefits | The main benefit of off-peak tariffs is the reduced unit price during off-peak hours, which can lead to significant savings on electricity bills. |
| Who should use off-peak tariffs? | Off-peak tariffs are beneficial for those who use at least 30% of their electricity at night or those whose businesses primarily operate during the night, such as late-night establishments. |
| Drawbacks | Off-peak hours can vary between suppliers, location, and time of year, making it challenging to keep track of. Additionally, there is a safety concern regarding the detection of electrical fires during the night. |
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What You'll Learn

Time-of-use tariffs
In the UK, most households pay a flat rate for electricity, meaning they pay the same amount for each unit of energy used, regardless of the time of day. However, some energy suppliers offer time-of-use tariffs, which provide cheaper rates during off-peak hours, usually at night and on weekends.
The specific off-peak hours can vary depending on the energy supplier and the type of time-of-use tariff. For example, Economy 7 tariffs typically offer seven hours of reduced rates overnight, while Economy 10 tariffs may provide a more varied range of off-peak hours throughout the day and night. It's important to review the contract parameters and understand your energy usage patterns before choosing a time-of-use tariff.
To maximise the benefits of time-of-use tariffs, households can consider using power banks to charge devices overnight and take advantage of cheaper electricity rates. Additionally, investing in a home battery storage system allows households to store electricity purchased during off-peak hours and use it during peak periods, further reducing energy costs.
While time-of-use tariffs can offer significant savings, it's important to note that the peak rates under these tariffs can be expensive. Households must carefully consider their energy consumption habits and shift their usage to off-peak periods to make the most of the reduced rates.
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Economy 7 and Economy 10
Economy 7 offers cheaper unit rates during off-peak hours, typically between midnight and 7 am. It is suitable for those who use at least 30% of their electricity at night and can be beneficial for those with storage heaters or large appliances. Economy 10, on the other hand, offers ten hours of off-peak access during each 24-hour period, including a combination of afternoon, evening, and night-time hours. The specific off-peak hours for both tariffs can vary depending on the region and energy supplier.
To make the most of these tariffs, it is recommended to use electricity-intensive appliances during off-peak hours. This includes using appliances like washing machines, dishwashers, tumble dryers, and electric showers at night or during off-peak times. Additionally, investing in a storage heater can be beneficial, as it stores heat during off-peak hours for use during peak hours.
It is important to note that to utilise these tariffs, a special meter that can handle multiple rates is required. Some energy suppliers offer dual-rate meters that automatically switch between off-peak and peak rates, making it more convenient for users.
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Off-peak hours
During off-peak hours, the demand for electricity is lower, which means energy companies can offer reduced rates. The grid is under less pressure, and electricity can be distributed more efficiently and at a lower cost. This is particularly beneficial for energy companies that rely on renewable energy sources, such as wind and solar power, which are more abundant during certain times of the day.
To take advantage of off-peak electricity rates, you will need to be on a time-of-use tariff, such as Economy 7 or Economy 10. These tariffs offer a cheaper rate during off-peak hours and a higher rate during peak hours. The number in the tariff name refers to the number of off-peak hours offered per day. For example, Economy 7 provides seven hours of off-peak electricity, usually at night.
It is important to note that while off-peak tariffs can result in significant savings, they may not be suitable for everyone. To benefit from these tariffs, you may need to adjust your energy usage habits and use most of your electricity during off-peak hours. Additionally, the unit costs during peak hours on these tariffs can be very high, so it is essential to review the terms of your contract carefully.
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Energy suppliers
In the UK, most households pay a flat rate for electricity, meaning they pay the same amount for each unit of energy used, regardless of the time of day. However, some energy suppliers offer variable pricing contracts, commonly known as time-of-use tariffs, which offer cheaper rates during off-peak hours. Off-peak hours usually fall at night and on weekends, when there is less demand for electricity.
Examples of time-of-use tariffs include Economy 7 and Economy 10. With these tariffs, customers are charged a lower rate during off-peak hours and a higher rate during peak hours. The number in the tariff name refers to the number of hours per day that the reduced rate applies. For example, with Economy 7, customers receive seven hours of reduced rates, typically grouped as five overnight hours and two evening hours.
Some energy suppliers that offer time-of-use tariffs in the UK include:
- British Gas: British Gas offers its PeakSave scheme, which provides customers with discounts on energy used on Sundays.
- Octopus Energy: Octopus Energy is the only energy supplier that has been recommended by Which? for five years in a row. It offers prices cheaper than the price cap, rewards for reducing usage when the grid is stressed, and smart tariff savings.
It is important to note that while time-of-use tariffs can result in significant savings, they may also lead to higher overall costs if customers are not disciplined about using electricity during the off-peak hours specified in their contract. Additionally, the specific times when electricity is cheaper vary from supplier to supplier, so it is essential to carefully review the parameters of your contract.
To find the best energy deal, it is recommended to compare dual fuel deals, which combine gas and electricity from the same provider, with separate gas and electricity deals. Green energy deals that feature electricity generated from renewable sources are also widely available.
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Energy costs
In the UK, British Gas offers an Economy 7 tariff that provides cheaper, off-peak electricity during 7 hours of the night when demand is low. This can be stored and used at any time. Their EV tariff savings calculator can help you compare the costs of charging your electric vehicle at different times and in different ways.
Time-of-Use rate plans, or TOU plans, are another option that can help you manage your energy costs. These plans charge different prices for electricity depending on the time of day and year. TOU plans typically have lower rates during off-peak and super off-peak periods, which can help you avoid higher weekday rates when energy resources are in higher demand.
You can also invest in smart appliances that can be programmed to turn on during off-peak hours automatically. This can help you reduce your on-peak energy consumption, even if you're not typically awake during off-peak hours.
By combining these strategies, such as shifting your energy usage to off-peak hours and investing in smart appliances, you can significantly reduce your electricity costs.
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Frequently asked questions
It depends on the type of tariff you're on. Most energy suppliers charge a flat rate for electricity, meaning you pay the same unit cost no matter the time of day. However, some suppliers offer cheaper rates during off-peak hours, which are usually at night and on weekends.
Check your electricity bill or meter. If your bill shows both a day and night rate, or your meter has two dials, one for peak and one for off-peak, you're on a time-of-use tariff.
Common time-of-use tariffs include Economy 7 and Economy 10. Economy 7 provides cheaper rates during 7 hours of the night, while Economy 10 groups off-peak hours throughout the day and night.
You can use appliances such as washing machines, dishwashers, and electric vehicles during the off-peak hours. You can also charge your devices, such as smartphones and laptops, overnight.
Yes. Daytime rates on these tariffs can be steep, and you may only save money if you use a substantial amount of electricity at night. Additionally, the unit costs during peak times can be very high, so you need to be disciplined about using devices during off-peak hours.









































