Domestic Energy Suppliers in the United Kingdom

Compare gas and electricity suppliers, understand tariffs and pricing, learn how Ofgem regulation and the price cap work, and switch in just days with no interruption to your supply. Explore green options, smart meters, and time-of-use tariffs to find the right fit for your home.

  • Ofgem-regulated market
  • No engineer visit or supply interruption when you switch
  • Fixed, variable and time-of-use tariffs
  • Smart meter and green energy options

No interruption to supply • Secure process • Takes minutes

How UK Domestic Energy Supply Works

In Great Britain, your energy supplier sells you gas and electricity and handles your billing and customer service. The network operators maintain the pipes and wires that deliver energy to your home. When you switch supplier, your meter and the local network don’t change, and there is no break in supply.

  • Regulation: Suppliers are regulated by Ofgem. Standards cover billing, switching, and customer protections.
  • Faster Switching: Many switches can complete in as little as 1 working day. In general, switching completes within around 5 working days. If you choose to use the 14-day cooling-off period, your switch happens after that period.
  • Price Cap: Ofgem’s price cap limits the unit rates and standing charges for standard variable tariffs. It is not a cap on your total bill; your costs depend on how much energy you use.
  • Meters: Homes may have credit meters, prepayment meters, or smart meters. Smart meters enable automatic readings and access to time-of-use tariffs.

Domestic Energy Suppliers in the United Kingdom

There are many licensed suppliers serving households across Great Britain. Availability and tariffs vary by region and over time. The examples below are representative, not exhaustive or ranked.

British Gas

Offers a range of electricity and gas tariffs, smart meter support, and online account management options.

EDF Energy

Provides fixed and variable tariffs, Economy 7 options, and digital tools to track your usage.

E.ON Next

Residential brand offering fixed and flexible tariffs, smart meter installations, and EV-friendly plans.

OVO Energy

Offers fixed and variable tariffs with digital account features and optional green add-ons.

Utility Warehouse

Provides energy alongside other home services, with bundled options available to eligible customers.

Ecotricity

Focuses on green electricity and offers tariffs designed for environmentally conscious households.

So Energy

Provides straightforward fixed and variable tariffs with online account management.

Supplier participation, tariff availability and features change over time. Always check current terms on the supplier’s website before switching.

Smart Meters: Accurate Bills and New Tariff Options

Smart meters send readings automatically and come with an in-home display to help you track usage. They can unlock time-of-use tariffs and provide more accurate bills. Installation is typically free from your supplier, and you can choose whether to have one installed.

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Help, Protections and Support Schemes

  • Priority Services Register (PSR): Extra support for eligible customers (for example, pensioners or those with a disability). Contact your supplier to join.
  • Warm Home Discount: Bill support for eligible households with participating suppliers. Eligibility and value can vary by year.
  • Winter Fuel Payment: A payment for eligible pensioner households. Check your eligibility on GOV.UK.
  • Hardship funds & grants: Some suppliers offer discretionary support and energy efficiency help (e.g., ECO schemes). Availability varies.

Suppliers must work with you if you’re struggling to pay. Reach out early to discuss payment plans and support options.

Is the Ofgem price cap a limit on my total bill?

No. The price cap limits unit rates and standing charges on standard variable tariffs. Your total bill still depends on how much energy you use.

How long does it take to switch energy supplier?

Many switches complete in as little as 1 working day. Typically it’s within around 5 working days. If you use your 14-day cooling-off period, your switch happens after that.

Will my energy be cut off during the switch?

No. The physical network doesn’t change, so there’s no interruption to your gas or electricity supply when you switch.

Do I need a smart meter to switch?

No, but smart meters can give you accurate bills and access to time-of-use tariffs. You can choose whether to have one installed.

Can I switch if I’m on a fixed tariff with exit fees?

Yes, but your current supplier may charge exit fees if you leave before the end date. Some tariffs have a fee-free switching window near expiry—check your terms.

Can I switch if I have debt on a prepayment meter?

You may be able to switch if you owe less than a set amount under the Debt Assignment Protocol (commonly up to £500 per fuel). Ask both suppliers about eligibility.

What’s the difference between fixed and variable tariffs?

Fixed tariffs lock in unit rates and standing charges for a set term, often with exit fees. Variable tariffs can move up or down, usually with fewer or no exit fees.

How do Economy 7 and Economy 10 work?

They offer cheaper night rates and higher day rates. They suit homes that can shift usage to off-peak hours or use storage heating or hot water tanks efficiently.

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Information on this page is general and may change. Always confirm current prices, fees, eligibility and terms with your chosen supplier and on Ofgem/GOV.UK. Last updated: October 2025.

British Gas

Scottish Power

EDF Energy

EON

NPower

SSE Energy

Octopus Energy

OVO

Utility Warehouse

Ecotricity

Good Energy

So Energy

Updated on 18 Nov 2025