Energy price cap explained

The energy price cap sets a limit on the maximum amount energy suppliers can charge for each unit of gas and electricity, as well as the daily standing charge. Set by the energy regulator Ofgem, it applies to most domestic energy customers in Great Britain on standard variable tariffs, not their total bill. This cap is reviewed and updated every three months, reflecting shifts in wholesale energy costs and other industry factors.

The energy price cap can feel like a complex system, but understanding it is key to managing your household energy. Fuse Energy aims to simplify this by providing clear explanations and digital tools, helping you take control of your energy usage and costs. Click here to see how Fuse Energy can help you manage your energy.

Understanding the energy price cap

What is the energy price cap?

The energy price cap is a limit on the maximum price energy suppliers can charge you for each unit of gas and electricity you use, as well as the daily standing charge. It is not a cap on your total energy bill; your final bill will still depend on how much energy you consume. The cap was introduced by the government in 2019 to protect households on expensive variable tariffs.

Who sets the energy price cap?

The energy price cap is set by Ofgem, the independent energy regulator for Great Britain. Ofgem's role is to protect consumers and ensure the energy market works for everyone. They publish the cap levels and the methodology used to calculate them, including components like wholesale costs, network costs, and operating costs.

Does the energy price cap apply to all energy bills?

The energy price cap primarily applies to most domestic energy customers in Great Britain who are on standard variable tariffs. This includes customers who pay by Direct Debit, standard credit, or prepayment meter. It generally does not apply to fixed-rate tariffs, unless the fixed tariff is more expensive than the current cap level.

How the energy price cap works

Components of the price cap: unit rates and standing charges

The energy price cap limits two main components of your energy bill: the unit rate for electricity (pence per kilowatt-hour, or kWh) and gas (pence per kWh), and the daily standing charge for both. The unit rate is what you pay for each unit of energy you use, while the standing charge is a fixed daily cost that covers the cost of supplying energy to your home, regardless of how much you use.

How the energy price cap is calculated

Ofgem calculates the energy price cap based on a range of factors, with wholesale energy costs being the most significant. Other elements include network costs (maintaining pipes and wires), operating costs (supplier overheads), environmental levies, and a small profit margin for suppliers. This calculation aims to ensure that suppliers can recover their costs while protecting consumers from excessive charges.

When does the energy price cap change?

Ofgem reviews and updates the energy price cap every three months (quarterly) . This regular adjustment allows the cap to reflect changes in the underlying costs of supplying energy, particularly the volatile wholesale energy market. Announcements are typically made in February, May, August, and November, with the new cap levels coming into effect in April, July, October, and January respectively.

Impact of the energy price cap on your household

The difference between the price cap and your total bill

It's a common misconception that the energy price cap limits your total monthly or annual energy bill. In reality, the cap only limits the maximum price your supplier can charge per unit of energy and the daily standing charge. If your household uses more energy, your total bill will increase, even if the unit rates are at the cap level. This means that while the cost per unit is controlled, your overall expenditure remains dependent on your consumption habits.

Fixed vs variable tariffs under the price cap

Under the energy price cap, most households are on standard variable tariffs, which are subject to the cap's unit rates and standing charges. Fixed-rate tariffs, on the other hand, lock in your unit rates and standing charges for a set period, usually 12 or 24 months. The price cap does not apply to fixed-rate tariffs unless they become more expensive than the cap.

Historically, fixed tariffs were often cheaper than variable ones, offering predictability. However, during periods of high wholesale energy costs, fixed tariffs might be more expensive than the cap, or few competitive fixed deals might be available. It's essential to compare current offers against the prevailing cap rates to determine which option best suits your needs, considering market conditions and your tolerance for price fluctuations.

Understanding your energy bill increase

If you've seen your energy bill increase, it's likely due to a combination of factors. Even with the price cap in place, unit rates and standing charges can still be higher than previous periods if Ofgem has increased the cap. Additionally, increased energy consumption within your household will directly lead to a higher total bill, regardless of the cap. For instance, the average UK home uses around 2,500 kWh of electricity and 9,500 kWh of gas per year, based on Ofgem's medium Typical Domestic Consumption Values (TDCVs) effective from 1 July 2026. Understanding your own usage patterns is key to deciphering why your bill has changed.

Managing your energy costs under the price cap

Practical steps to reduce energy consumption

Even with the energy price cap, managing your consumption remains the most effective way to control your energy bills. Simple measures can make a significant difference:

• Insulation: Improve loft and wall insulation to keep heat in. Many homeowners also consider upgrading their heating systems to more efficient options, such as an air source heat pump to further reduce energy consumption.
• Efficient appliances: Upgrade to A-rated appliances when possible.
• Thermostat control: Lower your thermostat by just one degree; this can reduce heating costs.
• Draft-proofing: Seal gaps around windows and doors.
• Turn off lights and electronics: Don't leave devices on standby.
• Shorter showers: Reduce hot water usage.

Using smart technology to gain control

Digital tools and smart technology offer powerful ways to manage your energy usage proactively. Smart meters, for example, provide real-time data on your consumption, allowing you to see exactly how much energy you're using and when. This can be particularly useful for understanding the energy demands of systems like air source heat pumps or air conditioning. Fuse Energy's app features and smart meter capabilities provide real-time insight and control over your energy usage, helping you make informed decisions within the cap's framework. This moves beyond generic "use less" advice, enabling you to identify specific areas for savings and adjust your habits accordingly.

Exploring alternative tariffs and switching options

While competitive fixed tariffs may not always be available, it's worth regularly checking the market. If a fixed tariff is offered below the current price cap, it could provide stability and potential savings. However, always consider any exit fees if you need to leave the tariff early. Fuse Energy encourages customers to understand their options and provides transparent information to help them navigate the market. If you're struggling with energy costs, contacting your supplier or seeking support from organisations like Citizens Advice can provide valuable assistance.

The future of the energy price cap

Ofgem's role in market stability

Ofgem's role in setting and adjusting the energy price cap is crucial for maintaining stability in the retail energy market and protecting consumers. The regulator continuously monitors market conditions and supplier performance to ensure the cap remains fair and effective. As the energy landscape evolves, Ofgem adapts its approach to balance consumer protection with a healthy, competitive market.

Government support and wider energy market trends

Beyond the price cap, government support schemes have historically provided additional relief to households, such as the Energy Bills Support Scheme or the Energy Price Guarantee. Future government interventions will continue to play a role in mitigating energy cost impacts, especially for vulnerable households. Wider energy market trends, including the transition to renewable energy sources and improvements in energy efficiency, will also influence long-term energy costs and the effectiveness of regulatory mechanisms like the price cap.

Understanding the energy price cap empowers you to make informed decisions about your household's energy consumption. Fuse Energy is committed to providing clear, transparent energy solutions and supporting you every step of the way. With 24/7 human customer support and an intuitive app, managing your energy has never been easier. Click here to switch to Fuse Energy today. To learn more about our mission to make energy abundant, click here.