Business electricity costs can vary depending on when you use power, not just how much you use. A time of use tariff charges different electricity rates at different times of the day, with lower prices during off-peak hours and higher rates during peak demand periods.

For UK businesses, this type of tariff can help reduce energy costs if flexible electricity use, such as EV charging, refrigeration, or equipment operation, is shifted to cheaper times. In this guide, you’ll learn how time of use tariffs work, their benefits and drawbacks, and whether they’re the right choice for your business.

What is a Time of Use Tariff?

A time of use tariff is an electricity plan where your business pays different unit rates depending on when electricity is used. Electricity is usually cheaper during off-peak hours and more expensive during peak demand hours.

For UK businesses, this tariff can be useful when some energy use can be shifted to cheaper times. For example, a business may schedule EV charging, equipment charging, refrigeration cycles, battery storage, or some machinery use outside peak hours.

This tariff is best for businesses with flexible electricity use. If your business uses most electricity during busy daytime hours, a fixed business electricity tariff may be easier and more predictable.

How Does a Time of Use Tariff Work in the UK?

A time of use tariff works by charging your business different electricity rates at different times of the day. Electricity is usually cheaper during off-peak hours and more expensive during peak demand hours.

For UK businesses, this means energy costs can be reduced when flexible usage is moved to cheaper periods. For example, a business may schedule EV fleet charging, equipment charging, refrigeration cycles, battery storage, heating, cooling, or some machinery use outside peak hours.

Most modern time of use tariffs need a smart meter because the supplier must record when electricity is used. This helps apply the correct peak or off-peak rate to your bill.

This tariff works best for businesses that can control when they use electricity. If your business uses most of its power during fixed daytime trading hours, the savings may be limited.

Pros and Cons of Time of Use Tariffs for UK Businesses

A time of use tariff can help some UK businesses reduce electricity costs, but it depends on how and when the business uses energy. It is most useful for businesses that can move flexible electricity use to off-peak hours.

Who Should Choose a Time of Use Tariff?

A time of use tariff is generally suitable for Businesses that can adjust when they use electricity. It may be a good option if you:

• Own an electric vehicle and charge it overnight.
• Use a smart meter.
• Run appliances such as Offices or Warehouses during off-peak hours.
• Have Restaurants with battery storage.
• Work flexible hours and can avoid peak-time electricity use.

These Businesses are more likely to reduce their electricity costs by taking advantage of lower off-peak rates.

Who Should Avoid a Time of Use Tariff?

A time of use tariff may not be the best choice if your electricity use mainly occurs during expensive peak hours. It may not suit Businesses that:

• Are home during the evening and use large amounts of electricity.
• Cannot shift energy usage to off-peak periods.
• Do not have a smart meter.
• Prefer predictable electricity pricing throughout the day.

In these cases, a fixed-rate tariff or standard variable tariff may offer better value.

Is a Time of Use Tariff Good for Businesses with Electric Vehicle Fleets

Yes. Time of use tariffs are often an excellent option for Businesses with Electric Vehicle Fleets because most EV charging takes place overnight when electricity prices are lower.

Charging an EV during off-peak hours can significantly reduce annual charging costs compared with charging during peak periods. Many UK energy suppliers also offer dedicated EV tariffs designed to maximise overnight savings.

Time of Use Tariff vs Economy 7

While Economy 7 offers a simple day and night rate, time of use tariffs often include multiple pricing periods throughout the day, providing greater flexibility for Businesses that can carefully manage their electricity usage.

Dynamic vs Static Time of Use Tariffs

There are two main types of time of use tariffs:

Static Time of Use Tariffs

Static tariffs have fixed peak and off-peak hours that remain the same every day. This makes it easier to plan when to use electricity.

Dynamic Time of Use Tariffs

Dynamic tariffs have electricity prices that change regularly based on wholesale market conditions. Prices may vary every half-hour, allowing customers to benefit from lower prices when electricity demand is low. However, they also carry greater price risk during busy periods.

Which UK Energy Suppliers Offer Time of Use Tariffs?

Several UK energy suppliers offer time of use or smart electricity tariffs, including suppliers with EV-focused or smart meter tariffs. Availability depends on your location, smart meter compatibility, and eligibility requirements. Before choosing a supplier, compare:

• Peak and off-peak unit rates
• Standing charges
• Exit fees
• Smart meter requirements
• EV charging benefits
• Customer service ratings

Comparing tariffs regularly can help you find the most cost-effective option for your household.

Time of Use Tariff for UK Businesses

A time of use tariff can be useful for UK businesses that can move some electricity usage to cheaper off-peak hours. Instead of paying one flat rate all day, your business may pay a lower rate during quieter periods and a higher rate during peak demand times.

This can help offices, shops, warehouses, restaurants, cafés, small manufacturers, and EV fleet businesses manage electricity costs more effectively.

For example, a business may schedule EV charging, equipment charging, battery storage, refrigeration cycles, heating, cooling, or some machinery use outside expensive peak hours.

However, this tariff is not suitable for every business. If most of your electricity use happens during normal daytime trading hours, the higher peak rate may reduce or remove the saving. Before switching, compare the peak rate, off-peak rate, standing charge, contract length, smart meter requirements, and your actual business usage pattern.

A time of use tariff works best when your business has flexible energy habits and can shift a meaningful part of electricity use to lower-cost periods.

Time of Use Tariff VS Fixed Energy Tariff 

A time of use tariff and a fixed energy tariff work in different ways. A time of use tariff changes the electricity rate depending on when you use energy, while a fixed tariff usually keeps the unit rate the same throughout the day. 

Common Types of Time of Use Tariffs in the UK

There are different types of time of use tariffs in the UK. Each tariff works slightly differently, so businesses should compare the rates, off-peak hours, standing charges, and smart meter requirements before switching.

Economy 7 Tariff

Economy 7 is one of the most common examples of a time of use tariff. It usually gives around seven hours of cheaper electricity during off-peak times, often overnight, and a higher rate during the rest of the day.

For businesses, Economy 7 may be useful if electricity use can be moved to night-time hours. This could include EV charging, battery charging, storage heating, or some equipment use outside normal trading hours.

Economy 10 Tariff

Economy 10 gives around ten hours of cheaper electricity, often split across different parts of the day and night. The exact times depend on the supplier and meter setup.

This may suit businesses that need flexible energy use at more than one time of day, such as small offices, workshops, or businesses using heating, cooling, or storage systems.

Smart Time of Use Tariff

A smart time of use tariff uses smart meter data to charge different rates at different times. These tariffs may include peak, off-peak, and sometimes super off-peak rates.

This can be useful for UK businesses that can plan electricity use carefully. For example, a business may charge EVs, batteries, or equipment when electricity is cheaper.

Dynamic Time of Use Tariff

A dynamic tariff changes prices more frequently based on electricity demand and market conditions. Prices may be lower when demand is low and higher when demand is high.

This type of tariff can offer savings, but it also needs more active monitoring. It is better for businesses that understand their usage pattern and can respond quickly to changing prices.

Business Half-Hourly Tariff

Some larger or higher-usage businesses may have half-hourly metering. This records electricity use every 30 minutes and helps suppliers bill more accurately based on when energy is used.

Half-hourly data can help businesses understand peak usage times, improve energy planning, and decide whether a time of use tariff is suitable.

EV Charging Tariff

Some suppliers offer tariffs designed for electric vehicle charging. These usually provide cheaper electricity during overnight or off-peak periods.

For businesses with electric vans, company cars, delivery vehicles, or EV fleets, this type of tariff may reduce charging costs if vehicles can be charged during cheaper hours.

What to Check Before Switching to a Time of Use Tariff

Before switching to a time of use tariff, your business should compare the full cost, not only the cheaper off-peak rate. A low off-peak price may look attractive, but higher peak rates or standing charges can reduce the saving.

Check the exact peak and off-peak hours first. These times can change depending on your supplier, location, meter type, and tariff. Your business should only switch if it can move enough electricity use to cheaper periods.

Also check whether your business has a working smart meter. Most modern time of use tariffs need smart meter data so your supplier can bill your usage correctly at different times of the day.

Use this checklist before switching:

Is a Time of Use Tariff Worth It in the UK?

A time of use tariff can be worth it for UK businesses that can move part of their electricity use to cheaper off-peak hours. It may help reduce energy costs for businesses with flexible operations, EV charging, battery storage, refrigeration cycles, heating, cooling, or equipment that can be used outside peak times.

This type of tariff is usually more suitable for offices, warehouses, workshops, restaurants, cafés, shops, and small manufacturers that can plan energy use carefully. If your business has a working smart meter, it may also be easier to track when electricity is being used and identify cheaper usage periods.

However, a time of use tariff is not always the best option. If your business uses most electricity during busy daytime trading hours, the higher peak rate may reduce the benefit. In that case, a fixed business electricity tariff may be safer and easier to manage.

Before switching, compare the peak rate, off-peak rate, standing charge, contract length, exit fees, and your actual business usage pattern. A time of use tariff is only worth it if the savings from off-peak usage are greater than any extra peak-time costs.

When Are Off-Peak Electricity Times in the UK?

Off-peak electricity times in the UK depend on your supplier, tariff type, meter, and location. There is no single off-peak time that every business

For many traditional Economy 7 tariffs, off-peak electricity is usually available for around seven hours overnight, often between midnight and 7am, but this can vary. Some time of use tariffs may offer cheaper rates late at night, early morning, or even during selected daytime periods.

Common off-peak patterns may include:

• Overnight cheaper rates, such as midnight to 7am
• Late-night EV charging windows
• Super off-peak hours for very low-demand periods
• Different peak, off-peak, and shoulder rates during the day

The best way to check your exact off-peak times is to look at your energy bill, supplier app, online account, or contact your UK energy supplier directly. If you are on a smart time of use tariff, your smart meter helps record when you use electricity so the correct rate can be applied

Conclusion

A time of use tariff can be a cost-effective option for UK businesses that can shift electricity use to cheaper off-peak hours. It is particularly suitable for businesses with EV charging, refrigeration, battery storage, or flexible operating schedules that allow energy-intensive tasks to be completed outside peak demand periods.

However, it is not the right choice for every business. Before switching, compare peak and off-peak rates, standing charges, contract terms, and your actual energy usage to ensure a time of use tariff offers genuine savings for your business. This guide is based on current UK energy market information and trusted industry sources, including Ofgem and other official energy organisations.