Compare Gas and Electricity in London

Looking for cheaper gas and electricity in London? Comparing energy tariffs can help you understand whether switching supplier or changing your current deal makes sense. Check electricity and gas unit rates, daily standing charges, payment methods, fixed-term conditions and exit fees before deciding. The lowest advertised rate is not necessarily the cheapest deal for your household.

This guide is for residents of London, including Camden, Westminster, Hackney, Southwark, Ealing and other boroughs. Use the simple bill calculator below to estimate annual spending, then compare actual supplier quotes for your postcode and consumption. For a Spanish-language explanation, see our electricity and gas guide in Spanish.

Ofgem sets a price cap on the unit rates and standing charges that suppliers can charge households on covered default tariffs. For 1 October to 31 December 2026, its headline figure is £1,723 per year for a typical dual-fuel household paying by Direct Debit, based on typical consumption. It is not a cap on your total bill: using more energy can mean paying more. Fixed-rate tariffs are not covered in the same way.

Across Great Britain, Ofgem's average Direct Debit rates for this quarter are 26.32p/kWh for electricity plus a 54.83p daily standing charge, and 7.97p/kWh for gas plus a 29.68p daily standing charge. Your rates can differ by postcode, meter and payment method. As of this quarter, electricity supplied under the price cap has no VAT until 31 March 2027; gas still includes 5% VAT.

See Ofgem's official energy price-cap rates for the latest figures. Ofgem updates the cap every three months, so verify the period before relying on any comparison.

1. Find your actual usage: check a recent electricity and gas bill for annual kWh consumption, your existing tariff name, unit prices and standing charges.
2. Compare complete costs: request personalised quotes using your postcode and annual usage. Consider fixed versus variable tariffs, payment method, customer service, contract duration and any exit fees.
3. Check the switching terms: if you choose to switch, the new supplier usually manages the transfer. Domestic switches should be completed within five working days, although you can request a later date. A fixed tariff may carry an early-exit fee.

Moving between suppliers should not require physical changes to your home wiring or interrupt your energy supply. If you have a genuine electrical fault, visit our London electrician information instead. For related heating or plumbing problems, see plumbers in London.

For the official process and cancellation rights, read Ofgem's guidance on switching supplier.

E.ON Next is one option to consider when comparing UK energy suppliers. Whether any of its tariffs are suitable or cheaper depends on your postcode, usage and current deal. Referral rewards, where offered, are subject to eligibility and the supplier's terms; a £50 credit is not guaranteed for every visitor.

Check E.ON Next Tariffs and Referral Terms

Referral disclosure: this is a referral link and the site owner may receive a benefit if you qualify. Compare other suppliers too; the link is not an independent whole-market comparison.

Managing household costs is easier when you consider bills alongside your wider budget. You can estimate your take-home pay with our UK salary and tax calculator, read about rooms in London, and browse the Lugar Latino London community directory. Our London jobs page is also available for people searching for employment in the city.