Smaller energy companies

Why would you choose a small energy company? Find out whether the tariffs and service offered by a small company would work for you.

Amy Smith
Amy Smith
Updated 03 May 2023  | 4 min read

Key points

  • Small companies have increased competition in a market that was once dominated by the ‘big six’ companies
  • The gas and electricity you receive is the same, no matter who supplies it
  • Ofgem regulates all energy suppliers and will step in if a company fails
  • Take price, service levels and other factors into account when choosing a supplier

Why choose a smaller supplier

Switching to a small energy company might save you money and you can use Go.Compare to help you consider your options. Here’s what you need to know about smaller energy suppliers.

Who were the ‘big six’ energy suppliers?

Six companies used to dominate the UK energy sector: British Gas, Npower, SSE, Scottish Power, E.ON and EDF Energy. These are the oldest private energy companies in the UK, dating back to when the energy sector was privatised in the 1990s.

But E.On acquired NPower in 2019, and Ovo bought SSE's retail arm in January 2020, so it's now also included in Ofgem's definition of 'large legacy suppliers'. It's not so clearly defined as 'six' companies any more.

These large suppliers were once associated with relatively high levels of customer complaints and high profits. but since more smaller energy companies have entered the market, increased competition has improved the situation.

According to Ofgem, in the last quarter of 2022 large legacy companies had 1,937 complaints per 100,000 customer accounts, medium-sized companies had 1,219 and small companies had 475.

Are there many smaller energy companies?

There are lots of smaller energy companies seeking to bring something to the market. The best-known ones include Green Energy UK, Ecotricity, Good Energy and E Energy. You should always check whether the tariffs and terms offered by a company suit your individual needs before switching.

Can I trust small energy companies?

Some smaller energy companies have gone bust in he last few months, making customers more reluctant to switch to them. According to Energy UK's Switching Report, in March 2023 18% of switches were from large suppliers to small or mid-size ones.

But all energy companies are regulated by Ofgem, and you have the same protection if your supplier goes bust, whether it’s a large company or a small one. 

Why do suppliers energy prices differ so much?

Small energy companies often have lower running costs than big suppliers. Plus, the government wants to encourage new companies to enter the energy market in order to improve competition.

When companies have fewer than 250,000 customers, suppliers have looser licence restrictions. For example, they are not required to pay green levies. The savings mean they can offer lower tariffs to customers when they compare energy prices.

Advantages of smaller energy suppliers

Small energy suppliers often offer lower prices tariffs than the bigger companies in order to compete with them for customers.

Small companies can operate in niche markets, focusing on a particular type of customer - for example, some companies offer renewable energy to customers concerned about the environment.

For some customers, the experience of customer service may be better with a small company than a larger one.

Disadvantages of small energy suppliers

Small companies are subject to less scrutiny than their larger competitors, meaning companies might experience financial or operational problems without much warning.

A number of small energy companies have become insolvent, while larger companies are less vulnerable to market forces.

Energy suppliers beneath a certain size are not obliged to be part of the Warm Home Discount Scheme. If you qualify for the scheme, it’s important to check if an energy company takes part before switching.

What happens if my energy supplier goes bust?

If your energy supplier goes bust, energy regulator Ofgem steps in. Ofgem invites other companies to bid for the insolvent supplier’s customers base, choosing a new supplier based on a competitive process.

You will be moved from a contract with the insolvent energy supplier to a new supplier. The new supplier is not obliged to give you the same tariff as the old company, but they do need to honour any credit on your account.

If you wish to switch to a supplier you choose yourself, you're free to do so - but it's advisable to wait until Ofgem moves you to the new supplier its chosen first if you have credit on your account that you want to claim back.

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