Economy 10 tariff explained

Economy 10 tariffs offer 10 hours of cheaper electricity rates daily, typically split across three periods. This allows households to significantly reduce their bills by shifting high-consumption activities to off-peak times. This multi-rate approach is particularly beneficial for UK homes with electric heating or electric vehicles that can adapt their energy usage patterns. Understanding how Economy 10 works and whether it suits your energy habits can empower you to make smarter energy choices and take control of your energy costs.

If you have electric heating and are looking to make the most of cheaper off-peak electricity, Fuse Energy's modern dual-rate tariffs, enabled by smart meters and the Fuse app, can help you take control. Click here to switch to Fuse Energy today.

What is an Economy 10 tariff?

An Economy 10 tariff is an electricity plan that charges different rates for electricity depending on the time of day it is used. Unlike standard tariffs with a flat rate, Economy 10 divides the 24-hour cycle into peak and off-peak periods, with the off-peak hours offering significantly lower unit rates. This tariff structure is designed to reduce electricity costs for households with high consumption during specific off-peak periods, often due to electric heating systems like storage heaters.

Understanding the multi-rate structure

The core principle of Economy 10 is to provide 10 hours of cheaper electricity daily, typically split into three distinct periods. These periods usually include a few hours in the afternoon, a longer overnight stretch, and a few hours in the morning. This structure encourages consumers to use electricity-intensive appliances when demand on the National Grid is lower, benefiting both the consumer through reduced costs and the grid through better load balancing.

How Economy 10 differs from standard tariffs

Standard tariffs, often called single-rate tariffs, charge the same unit rate for electricity regardless of the time of day. This simplicity means your electricity cost per kilowatt-hour (kWh) remains constant. Economy 10, however, introduces complexity with its multiple rates. While the off-peak rates are significantly cheaper, the peak rates on an Economy 10 tariff are typically higher than the flat rate of a standard tariff. This difference means that if you do not effectively shift your usage, you could end up paying more overall.

How Economy 10 tariffs work

Economy 10 tariffs work by measuring your electricity consumption during different time blocks throughout the day. To benefit, you need to use the majority of your electricity during the designated 10 off-peak hours. This requires a conscious effort to schedule activities like charging electric vehicles, running washing machines, or heating water during these cheaper periods.

Typical off-peak periods and regional variations

The specific off-peak times for Economy 10 can vary significantly by supplier and region, making it crucial to check the exact schedule for any proposed tariff. Generally, the 10 hours are broken down into three blocks:

• Afternoon boost: Often 2-3 hours in the mid-afternoon (e.g., 1pm - 4pm).
• Overnight charge: A longer period, typically 5-7 hours overnight (e.g., 10pm - 5am).
• Morning top-up: A shorter period, sometimes 2-3 hours in the early morning (e.g., 4am - 7am).

These timings are not fixed and can differ even within the same distribution network area, so always confirm with your energy supplier.

The role of multi-rate meters

To accurately track consumption during different rate periods, multi-rate tariffs like Economy 10 require either a smart meter or a multi-register 'dumb' meter. These meters have multiple registers that record electricity usage separately for each tariff period (e.g., one for peak, one for off-peak). Without such a meter, your supplier cannot differentiate between your peak and off-peak usage, making an Economy 10 tariff impossible.

Calculating your savings potential

Assessing potential savings with an Economy 10 tariff involves comparing your current electricity usage patterns with the proposed tariff's rates. You need to estimate how much of your average UK home's electricity use (around 2,500 kWh per year, according to Ofgem1) you can realistically shift to the cheaper off-peak hours. If a substantial portion of your high-consumption activities can be moved, the savings can be significant. However, if you continue to use a lot of electricity during the more expensive peak hours, your bills could increase.

Who benefits most from Economy 10?

Economy 10 tariffs are not for everyone. They are best suited for households that can actively manage their energy consumption and have specific energy needs that align with the off-peak periods.

Households with electric heating systems

Homes relying on electric heating, particularly those with storage heaters, are prime candidates for Economy 10. Storage heaters are designed to charge up during cheaper off-peak hours and then release heat throughout the day. By programming these systems to operate during the 10 discounted hours, you can significantly reduce your heating costs.

Electric vehicle owners

Electric vehicle (EV) owners can also see substantial benefits. Charging an EV battery is a high-consumption activity, and doing so during the cheaper overnight or morning Economy 10 periods can dramatically lower the cost of running your car. Many modern EV chargers can be programmed to start charging automatically during these off-peak windows.

Consumers with flexible energy usage habits

Beyond heating and EVs, anyone who can flexibly schedule their energy-intensive tasks stands to gain. This includes running dishwashers, washing machines, and tumble dryers overnight or in the afternoon off-peak slots. The key is active management and a willingness to adapt your daily routine to align with the tariff's cheaper hours.

Economy 10 vs Economy 7: key differences

While both Economy 10 and Economy 7 are multi-rate tariffs, they differ in the number and distribution of their off-peak hours. Understanding these distinctions is crucial for choosing the right tariff for your home.

Number of off-peak hours

The most obvious difference is the number of cheaper hours. Economy 10 provides 10 hours of off-peak electricity daily, whereas Economy 7 offers 7 hours. This extra three hours can make a considerable difference for households with very high electricity demand.

Distribution of off-peak times

Economy 7 typically offers its 7 off-peak hours in a single block overnight, usually between 11pm and 7am (though this can vary). Economy 10, as discussed, splits its 10 hours into three distinct periods: afternoon, overnight, and morning. This split distribution offers more flexibility for some, allowing for cheaper usage during the day as well as overnight.

Suitability for different lifestyles

Economy 7 is generally well-suited for households that can concentrate almost all their high-consumption activities into a single, long overnight period. This often includes homes with older storage heaters or those who primarily charge EVs overnight. Economy 10's split periods might be better for those who need a daytime boost for heating or other appliances, or who have more varied energy demands throughout the 24-hour cycle.

Assessing if Economy 10 is right for you

Deciding whether an Economy 10 tariff is beneficial requires a careful look at your current energy habits and meter setup. It is not a one-size-fits-all solution.

Analysing your current energy consumption

Start by understanding when and how you use electricity. Review past bills or, if you have a smart meter, use its data to identify your peak usage times. Consider if you can realistically shift activities like laundry, dishwashing, or EV charging to the off-peak windows. If a significant portion of your usage cannot be moved, the higher peak rates of Economy 10 could outweigh any savings from the cheaper hours.

Checking your meter compatibility

Multi-rate tariffs require a compatible meter. You will need either a smart meter or a multi-register 'dumb' meter. If you have an older, single-rate meter, you will not be able to switch to Economy 10 without a meter upgrade. Your current supplier can advise on your meter type and options for upgrading to a smart meter, which is typically free.

Considering modern multi-rate alternatives

While Economy 10 has been around for a while, modern multi-rate tariffs, often enabled by smart meters, offer even greater flexibility. These can include tariffs specifically designed for EV charging or those that dynamically adjust rates based on grid demand. Fuse Energy, for example, offers dual-rate tariffs and an app that empowers customers to monitor and shift usage, turning multi-rate tariffs into a strategic advantage.

The future of multi-rate tariffs and smart energy

The energy landscape is evolving, with smart technology playing an increasingly central role in how we manage our consumption and interact with multi-rate tariffs.

The phase-out of legacy meters

The Radio Teleswitch Service (RTS) meters, a legacy meter type often used for multi-rate tariffs, began to be phased out from 30 June 2025. This industry-wide change means that current suppliers are replacing these older meters with smart meters. This shift is designed to modernise the energy system, providing more accurate readings and enabling more sophisticated tariff structures.

Smart meters and enhanced control

Smart meters are key to unlocking the full potential of multi-rate tariffs. They automatically send meter readings to your supplier, eliminating the need for manual submissions and ensuring accurate billing. More importantly, they provide you with near real-time data on your energy consumption, often accessible through an in-home display or a mobile app. This visibility is crucial for actively managing your usage and maximising savings on tariffs like Economy 10.

Empowering your energy choices with modern apps

Modern energy apps, like the one offered by Fuse Energy, transform how you interact with multi-rate tariffs. Instead of just providing data, these apps offer tools to help you optimise your energy usage. They can help you track your consumption during different rate periods, providing the transparency needed to manage your usage effectively. This empowers you to make informed decisions, shift your usage strategically, and truly benefit from the cheaper rates available, moving beyond a "use less" mindset to one of active energy management.

Managing your energy bills should be clear and easy to understand. Fuse Energy focuses on straightforward pricing, so you can see exactly what you are paying without unnecessary complexity. If you have a smart meter, you can view detailed usage data through the app or website, helping you understand how you can lower your bills. If you do not have a smart meter, Fuse Energy can upgrade your non-smart meter, completely for free. This can make it easier to track spending and make informed decisions about your energy use. Our 24/7 human support team is always on hand with fast response times of under 5 minutes whenever you need help. Click here to switch to Fuse Energy today. Find out about our mission by clicking here.

References

1. Ofgem. Review of typical domestic consumption values