Fuse Energy: how to leave, exit fees, fixed tariff ending, price rises and moving

Fuse Energy is a London supplier run almost entirely through its app. The licence holder is Fuse Energy Supply Limited, company number 08469701, with its notice address at One Bank Street, Canary Wharf, London E14 4SG. It supplies gas and electricity to homes in Great Britain and offers variable tariffs that it positions below the Ofgem price cap, fixed tariffs and multi-rate tariffs with customer-chosen peak and off-peak periods. Its energy supply terms were last updated on 26 July 2026 and are the main source for this page.

How to leave Fuse Energy

The simplest route is the one Ofgem designed: pick a new supplier, sign up, and let them notify Fuse. The switch completes within five working days and Fuse issues a final bill. If you would rather tell Fuse yourself, section 9 of the terms lets you end the contract “by giving us 28 calendar days’ notice provided that (a) either another supplier takes over supplying Energy to the Premises by the end of your notice period, or the supply has been disconnected by this date; and (b) all amounts due by you to us have been paid”.

Within 14 calendar days of submitting your switch request you are in the cooling-off period and can cancel at any time without a fee. Fuse communicates electronically, so give notice in the app’s support section or by email to support@fuseenergy.com and keep the confirmation. Citizens Advice notes the old supplier must send the final bill within six weeks and refund any credit within 10 working days of it.

Notice period and fixed tariffs

Fuse’s fixed-rate tariffs may carry an exit fee; section 5 says that “on some Energy Contracts you may have to pay an exit fee if you cancel your Contract before the term expires”. The amount and the term are in your contract documents in the app. The same section lists when no fee is due: during the cooling-off period, in the last 49 days of the contract, when you reject a change that is not to your advantage, when you move house and take a new Fuse contract within six weeks, and on any variable rate tariff.

The 49-day rule comes from Ofgem’s October 2013 reforms, which also oblige every supplier to notify you between 42 and 49 days before a fixed term ends and ban automatic rollover onto another fix. Fuse’s section 10 follows that: “When your Fixed Rate Tariff ends, unless you choose to move onto a new Fixed Rate Tariff, or onto a Variable Rate Tariff… we will automatically transfer you a Variable Rate Tariff.” See the guide to a fixed energy tariff ending.

Price rises: your rights

On a fixed tariff the unit rates and standing charge do not change for the term. On variable tariffs section 8 says: “If we propose to make changes to your Contract that are not to your advantage (such as increasing charges) we will give you reasonable notice of the changes.” Ofgem puts a floor under “reasonable”: since April 2011 licence condition 23 has required at least 30 days’ advance notice of a price increase. If you do not accept the change you can leave, and section 8 gives you until 20 working days after the increase takes effect for the new supplier to notify Fuse. No exit fee applies in that case.

Moving home

Section 12 requires you to tell Fuse “within 28 calendar days of moving out” and to give a forwarding address; if Fuse has to trace you, the costs can be added to the final bill. Upload meter readings for moving day in the app.

If you want Fuse at the new home, the exit fee waiver in section 5 applies when you “enter into a new Contract at the new Premises” within six weeks and start that switch within one week of cancelling the old one. If you choose another supplier at the new address and your fix still has more than 49 days to run, any exit fee stands. Our guide on moving house and your energy supplier explains deemed contracts at the new property and who to tell first.

Contact and complaints

Fuse publishes no phone line for customers. Contact is through the support section of the Fuse app or support@fuseenergy.com. Formal notices can go to Fuse Energy, One Bank Street, Canary Wharf, London E14 4SG (section 21).

Complaints follow section 16: “When you submit a formal complaint, we will do everything in our power to resolve the issue. If we cannot find a mutually acceptable solution, we will write to you to explain our position and our best offer. This is known as a deadlock letter.” If you reject the deadlock offer, or the complaint has run for more than eight weeks, you can refer it to the Energy Ombudsman on 0330 440 1624, enquiry@energyombudsman.org, or PO Box 966, Warrington WA4 9DF. The service is free, you have 12 months from the deadlock letter, and its decision binds Fuse. Citizens Advice (0808 223 1133) advises at any stage.

What to check before you switch

Open your tariff details in the app and note the end date, the exit fee and whether you are on a fixed, variable or multi-rate tariff. Count back 49 days from the end date; after that point the switch is free. Make sure the account is paid up, because section 9 makes payment a condition of ending the contract. Your annual consumption in kWh is on any bill, explained in our bill guide.

Then compare live deals in the UK energy comparison, follow the checklist in how to switch energy supplier, and set the contract end reminder for the start of your 49-day window.