
A fixed energy tariff locks in the unit rate you pay for electricity and gas, along with your daily standing charge, for a set contract period. This means the price you pay per unit of energy and your daily charge remain constant, regardless of market fluctuations, for the duration of your agreement.
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Fixed tariffs are designed to offer predictability in your energy costs. They contrast with variable tariffs, where unit rates and standing charges can change. For many households, this stability is a key factor in managing budgets in a volatile energy market.
When you sign up for a fixed energy tariff, your energy supplier agrees to provide electricity and/or gas at a specific unit rate (pence per kilowatt-hour, or kWh) and a daily standing charge for a predetermined contract length. This period typically ranges between 12 and 18 months. All tariff rates (unit rates and standing charges) are quoted inclusive of VAT at 5% for domestic customers. This means that even if wholesale energy prices fluctuate, your per-unit cost remains the same.
The main difference lies in price stability.
Choosing a fixed energy tariff can offer several advantages for UK residential customers:
While fixed tariffs offer stability, they also come with potential downsides:
Deciding whether a fixed energy tariff is suitable depends on your priorities and tolerance for risk.
If budgeting stability and protection from potential price hikes are your main concerns, a fixed tariff could be a good choice. However, if you are prepared to monitor the market and switch frequently to take advantage of potential price drops, a variable tariff might offer more flexibility.
Always compare available tariffs, considering the contract length, unit rates, standing charges, and any associated exit fees, to find the best fit for your household's needs.
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 whenever you need help. Click here to switch to Fuse Energy today. Find out about our mission by clicking here.
Not necessarily. A fixed tariff means your unit rate (price per kWh) and daily standing charge remain constant. Your total bill will still vary based on how much energy you use. If you use more energy, your bill will be higher, even on a fixed tariff.
When your fixed tariff ends, your supplier will typically move you onto their Standard Variable Tariff, which is subject to the energy price cap. They should notify you before your contract ends, giving you time to compare new deals and switch to another fixed tariff or supplier if you wish. For example, Ofgem announced a 13% increase in the energy price cap from 1 July 2026, driven by higher wholesale gas prices.
Yes, you can switch from a fixed tariff early. However, you may incur an exit fee from your current supplier if you are outside the initial 14-day cooling-off period and not within the last 49 days of your contract. If you move home and take Fuse to your new property, no exit fee applies.
For the avoidance of doubt, this article is provided for informational purposes only and is not intended to constitute legal or financial advice. The author and/or Fuse Energy shall not be responsible for any losses arising out of any reliance on the information contained herein.