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Supplier guides

UK business energy suppliers

Contact numbers, online account logins, out-of-contract rates and ownership for 25 suppliers serving UK businesses. 24 supply both electricity and gas, and every one publishes its deemed or out-of-contract rates. Every fact is checked against the supplier's own website and Companies House.

Supplier details last checked 12 September 2026

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At a glance

Business energy suppliers compared

Every supplier we profile, what they supply, who they serve and where to find their published rates. Sort by clicking a column heading.

Published rates
British Gas Business Electricity and gas Microbusinesses, Small and medium businesses, Corporate Centrica plc Deemed and out-of-contract rates
British Gas Lite Electricity and gas Small and medium businesses Centrica plc Deemed and out-of-contract rates
Corona Energy Electricity and gas Microbusinesses, Small and medium businesses, Corporate, Public sector Macquarie Group Deemed and out-of-contract rates
Crown Gas & Power Electricity and gas Small and medium businesses, Industrial and commercial Crown Gas and Power Deemed and out-of-contract rates
Drax Energy Solutions Was Haven Power until 2021 Electricity only Industrial and commercial Drax Group plc Deemed and out-of-contract rates
Dyce Energy Electricity and gas Microbusinesses, Small and medium businesses, Corporate Independent Deemed and out-of-contract rates
E.ON Next (Business) Electricity and gas Microbusinesses, Small and medium businesses E.ON UK Limited Deemed and out-of-contract rates
Ecotricity Electricity and gas Small and medium businesses Green Britain Group Limited Deemed and out-of-contract rates
EDF Electricity and gas Microbusinesses, Small and medium businesses, Industrial and commercial, Public sector EDF Energy Limited Deemed and out-of-contract rates
ENGIE Electricity and gas Microbusinesses, Small and medium businesses, Corporate, Industrial and commercial, Public sector ENGIE SA Deemed and out-of-contract rates
Good Energy Electricity and gas Small and medium businesses Esyasoft Deemed and out-of-contract rates
Maxen Power Electricity and gas Small and medium businesses, Corporate Independent Deemed and out-of-contract rates
npower Business Solutions Electricity and gas Corporate, Industrial and commercial E.ON group Deemed and out-of-contract rates
Octopus Energy for Business Electricity and gas Microbusinesses, Small and medium businesses, Industrial and commercial Octopus Energy Group Limited Deemed and out-of-contract rates
PE Solutions Was Pozitive Energy until 2024 Electricity and gas Microbusinesses, Industrial and commercial, Charities Pozitive Holdings Ltd Deemed and out-of-contract rates
Ruby Energy Was BES until 2024 Electricity and gas Small and medium businesses, Corporate Independent Deemed and out-of-contract rates
ScottishPower Business Electricity and gas Microbusinesses, Small and medium businesses Iberdrola Group Deemed and out-of-contract rates
SEFE Energy Was Gazprom Energy until 2022 Electricity and gas Small and medium businesses, Corporate, Industrial and commercial, Public sector, Not-for-profit SEFE Energy GmbH Deemed and out-of-contract rates
SmartestEnergy Was Dual Energy until 2020 Electricity and gas Microbusinesses, Small and medium businesses, Industrial and commercial, Generators Marubeni Corporation Deemed and out-of-contract rates
SSE Energy Solutions Was SSE Business Energy until 2021 Electricity and gas Small and medium businesses, Industrial and commercial, Public sector SSE plc Deemed and out-of-contract rates
TotalEnergies Gas & Power Was Total Gas & Power until 2021 Electricity and gas Small and medium businesses, Industrial and commercial, Public sector, Not-for-profit TotalEnergies SE Deemed and out-of-contract rates
TruEnergy Electricity and gas Microbusinesses, Small and medium businesses, Industrial and commercial Independent Deemed and out-of-contract rates
United Gas & Power (UGP) Electricity and gas Microbusinesses, Small and medium businesses, Corporate Independent Deemed and out-of-contract rates
Valda Energy Electricity and gas Small and medium businesses Valda Energy Group Limited Deemed and out-of-contract rates
Yü Energy Electricity and gas Microbusinesses, Small and medium businesses, Corporate, Public sector Yü Group PLC Deemed and out-of-contract rates

From each supplier's own website and Companies House, checked 12 September 2026. "Published rates" links to the supplier's own price list, which is the rate you pay with no contract in place.

Our panel

Suppliers you can compare through us

We compare prices from a panel of UK business energy suppliers. We do not cover every supplier in the market. Enter your postcode and you will see live prices from these 8.

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All profiles

Every supplier we profile

Contact numbers by department, account logins, ownership and published rates for each supplier. Panel suppliers are listed first.

Switching

How to switch business energy supplier

  1. Find your contract end date. It is on your bill or contract. Most suppliers will quote for a contract that starts the day your current one ends, up to a year ahead. The renewal planner works the dates out for you.
  2. Check whether you owe notice. Some contracts require written notice before the end date. Microbusinesses cannot be held in by a notice requirement at the end of a fixed term.
  3. Have your details ready. Your MPAN or MPRN, annual usage in kWh, and your current unit rate and standing charge.
  4. Compare on one day. Prices move daily with the wholesale market, so quotes gathered a fortnight apart are not comparable.
  5. Compare the total, not the headline rate. The quote comparison calculator shows which offer is cheaper at your usage once the standing charge is counted.
  6. Sign, and let the new supplier do the rest. It arranges the transfer, your supply is never interrupted, and you get a final bill from the old supplier.

The full switching guide covers objections, exit fees and what to do if a switch is blocked.

Changes

Closed and renamed suppliers

Business energy brands change hands often. If you have a bill from one of these names, here is where things stand.

Closed Opus Energy Opus Energy has closed and says it is no longer responding to enquiries. Most of its small business customers moved to EDF in September 2024, and the rest moved to Pozitive Energy... Renamed 2021 Haven Power is now Drax Energy Solutions Drax has left the small business market. It sold its Opus Energy small business customers to EDF and Pozitive Energy, completing the final sale in May 2025,... Renamed 2021 SSE Business Energy is now SSE Energy Solutions SSE Energy Solutions is the business energy arm of SSE plc, based in Reading, and supplies electricity and gas to businesses of all sizes and to local... Renamed 2021 Total Gas & Power is now TotalEnergies Gas & Power TotalEnergies Gas & Power is moving customers onto a new service platform, with new account numbers starting 'A-'. It is also not taking on new broker partners... Renamed 2022 Gazprom Energy is now SEFE Energy SEFE Energy no longer offers new contracts to customers using less than 50,000 kWh of gas or electricity, so if you are a smaller existing customer, check with... Renamed 2020 Dual Energy is now SmartestEnergy SmartestEnergy is owned by Marubeni Corporation and supplies electricity and gas to UK businesses through two companies: SmartestEnergy Limited for large users... Renamed 2024 Pozitive Energy is now PE Solutions Pozitive Energy rebranded as PE Solutions in April 2024 and moved its headquarters to Canary Wharf. The licensed supplier is still Pozitive Energy Ltd, and the... Renamed 2024 BES is now Ruby Energy Ruby Energy is the August 2024 rebrand of BES: its supply companies were renamed Ruby Electricity Ltd and Ruby Gas Ltd on 6 August 2024. Ofgem opened an...
FAQs

Business energy supplier FAQs

Who are the biggest business energy suppliers in the UK?

Large suppliers to UK businesses include British Gas, EDF, E.ON (through E.ON Next and npower Business Solutions), SSE Energy Solutions, ScottishPower, TotalEnergies and SEFE Energy, alongside business specialists such as Yü Energy, Crown Gas & Power, Valda and SmartestEnergy. Which suits you depends on your size, meter and contract needs.

Which business energy supplier is cheapest?

There is no single cheapest supplier. Business prices are quoted individually and depend on your region, meter, usage, credit rating and contract length, and they change daily with the wholesale market. The only way to know is to compare quotes for your own supply on the day you buy.

Does Octopus Energy do business energy?

Yes. Octopus Energy supplies business customers as well as households, and has its own business contact routes and online account. See our Octopus Energy business profile for what it offers and how to reach it.

Can I use a domestic energy supplier for my business?

Only if that supplier offers business contracts. Business premises need a business contract: being billed on a domestic tariff at business premises can cause problems with VAT, the Climate Change Levy and your contract terms. Running a business from home is the exception, covered in our home business energy guide.

What happens if my business energy supplier goes bust?

Ofgem appoints a Supplier of Last Resort to take over customers, and your supply continues without interruption. You are moved onto a deemed contract with the new supplier and can compare and switch from there. See what happens if your supplier goes bust.

How do you check these supplier details?

Every profile is built from the supplier's own website, Companies House and Ofgem, never from other comparison sites. Profiles were last checked on 12 September 2026.

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