The Best UK Business Energy Suppliers

By Julia Watts | Content Manager | Updated: 22 February 2018

When choosing the best option for your business energy supplier, your first concern is naturally the cost. We get it – you’re a business, and minimising your costs makes complete business sense. However there are other things to consider when choosing a provider. How responsive is their customer service team? How do they generate their power? Do they partner with charities?

Taking a broader view to choosing your provider means you can feel comfortable about the ethics of the company you are partnering with. It also means you might avoid lengthy periods of time on hold. Unlike domestic contracts, businesses are able to negotiate their energy rates. Don’t be afraid to take quotes to the supplier you want to see if they can beat them.

But with so many suppliers offering a similar product, how can you tell which is the best? By reading our comprehensive guide to the best business energy suppliers, of course!

We’ve compared 30 business energy providers on price, eco-friendliness and customer service. By obtaining sample quotes and comparing fuel mix disclosures, tariffs and Trustpilot scores, we’ve made your life a whole lot simpler.

The big six energy suppliers

These are the most popular energy suppliers (the ‘big six'):

  1. British Gas
  2. EDF Energy
  3. E.ON
  4. nPower
  5. Scottish Power
  6. SSE

Chances are you’ll have heard of most of them. That’s because the Big Six account for 81% of the UK energy market. We compared the Big Six on the criteria that we think matter to customers:

  • Their prices (‘out of contract’ rates and a sample quote)
  • How they are rated by other customers
  • How quickly they pick up the phone
  • How their electricity is generated

It’s worth mentioning that the ‘out of contract’ rates are effectively the worst possible, and should be a last resort. You will get the best rates if you commit to a fixed rate contract with a provider, usually for a year or more. It’s therefore really important to get quotes tailored to your business, to ensure you’re getting the best possible deal. Fill in this form to get yours.

Big 6 comparison

ProviderSample small business electricity quote* (20,000 KWh/year)Out of contract electricity rate (in pence)Out of contract gas rate (in pence)Consumer rating**Time taken to speak to customer services (over phone)***
British Gas logo£2339.19 /year21.69/kwh 57.44/day6.41/kwh 96.07/day44%1 min 42 sec
EDF logo£2487.98 /year20.20/kwh
38.5%6 min 31 sec
E.ON logo£2559.87 /year17.70/kwh
47%1 min 25 sec
nPower logo£2465.92 /year25.46/kwh
25.5%2 min 20 sec
Scottish Power logo£2544.87 /year17.50/kwh
28%2 min 25 sec
SSE logo£2492.54 /year17.17/kwh
34%7 min 35 sec

*for an example small business using 20,000 kwh and based in North West London

**calculated by combining the Which? consumer rating and Trustpilot score

***calls carried out at around 2pm on Wednesday 14th February 2018

British Gas

British Gas have the highest market share for both gas and electricity with 15 million customers in the UK. They have, however, lost over 20% of their market share in the last ten years as independent suppliers have gained strength. More on them later.

British Gas
Founded in1997
Number of UK customers15 million
Customer rating44%
Out of contract electricity tariff21.69/kwh
Out of contract gas tariff6.41/kwh
Sample small business electricity quote
(20,000 KWh)
£2339.19 /year
Partner CharityShelter

British Gas Fuel Mix Pie Chart

British Gas fuel mix disclosure

Doughnut chart for time taken to answer phone for British Gas

Time taken to answer phone 1 min 42 sec

EDF Energy

French company EDF generate electricity as well as supplying both gas and electricity to UK businesses. EDF are highly reliant on nuclear energy as a source for their electricity, generating 77% of it in this way.

EDF Energy
Founded in2002
Number of UK customers5.5 million
Customer rating38.5%
Out of contract electricity tariff20.20/kwh
Out of contract gas tariff5.90/kwh
Sample small business electricity quote
(20,000 KWh)
£2487.98 /year
Partner CharityBreast Cancer Now

EDF Energy Fuel Mix Pie Chart

EDF fuel mix disclosure

Doughnut chart for time taken to answer phone for EDF

Time taken to answer phone 6 min 31 sec


E.ON are a very large utilities supplier, operating in over 30 countries and with 30 million customers worldwide. Over the last ten years, they have invested more than £7 million in renewable energy, and now generate 37.2% of their energy through renewable methods (13% above the UK average).

Founded in2000
Number of UK customers5 million
Customer rating47%
Out of contract electricity tariff17.70/kwh 83.00/day
Out of contract gas tariff4.29/kwh 102.00/day
Sample small business electricity quote
(20,000 KWh)
£2559.87 /year
Partner CharityAlzheimer’s Society

E.ON Fuel Mix Pie Chart

E.ON fuel mix disclosure

Doughnut chart for time taken to answer phone for E.ON

Time taken to answer phone 1 min 25 sec


British company nPower may not score especially well among customers, but they are hoping that their proposed merger with SSE might be just the boost they need. With a combined customer base, the two will be able to rival long-time market leaders, British Gas.

Founded in2000
Number of UK customers6.5 million
Customer rating25.5%
Out of contract electricity tariff25.46/kwh 57.79/day
Out of contract gas tariff5.90/kwh 35.00/day
Sample small business electricity quote
(20,000 KWh)
£2465.92 /year
Partner CharityMacmillan Cancer Support (and others)

nPower Fuel Mix Pie Chart

nPower fuel mix disclosure

Doughnut chart for time taken to answer phone for nPower

Time taken to answer phone 2 min 20 sec

Scottish Power

Scottish Power, owned by Spanish company Iberdrola, are one of the most established members of the Big Six. They have partnered with Cancer Research UK since 2012, and during this time have raised a highly commendable £15 million.

Scottish Power
Founded in1990
Number of UK customers5.6 million
Customer rating28%
Out of contract electricity tariff17.50/kwh 46.00/day
Out of contract gas tariff5.50/kwh 25.00/day
Sample small business electricity quote
(20,000 KWh)
£2544.87 /year
Partner CharityCancer Research UK

Scottish Power Fuel Mix Pie Chart

Scottish Power fuel mix disclosure

Doughnut chart for time taken to answer phone for Scottish Power

Time taken to answer phone 2 min 25 sec


Scottish company SSE (formerly Scottish and Southern Electricity) are involved in both the generation and supply of gas and electricity, as well as the operation of gas and telecoms networks. In 2013 they became one of the first major companies to commit to paying all their staff the living wage.

Scottish Power
Founded in1998
Number of UK customers3.5 million
Customer rating34%
Out of contract electricity tariff17.17/kwh 16.57/day
Out of contract gas tariff3.24/kwh 128.00/day
Sample small business electricity quote
(20,000 KWh)
£2492.54 /year
Partner CharityNordoff Robbins

SSE Fuel Mix Pie Chart

SSE fuel mix disclosure

Doughnut chart for time taken to answer phone for SSE

Time taken to answer phone 7 min 35 sec

We can’t stress enough that the out of contract tariffs are the worst rates you would pay with these companies, and that the sample quote is just that – a sample. Getting quotes with the details of your own business is the only way to be able to make an accurate comparison. And we can’t stress enough how easy it is! Simply fill in our online form.

Best independent suppliers

The Big Six, as they have come to be known, are the legacy of privatisations that occured in the UK in the 90s. For a long time, their near monopoly of the market has been taken for granted. People often assume that their size enables them to offer the most competitive deals.

Well, that’s not always the case.

Over the last few years, Ofgem have reported an influx of new, independent suppliers. These new companies are targeting a public that is increasingly savvy, and increasingly disillusioned with the big corporate energy companies. And they’re succeeding.

Non-domestic market shares for electricity in June 2018

Non-domestic market shares for electricity in June 2018

Non-domestic market shares for gas in June 2018

Non-domestic market shares for gas in June 2018Ofgem's annual State of the Market report showed independent suppliers have massively increased in popularity

As a business, choosing the right supplier for your gas and electricity is a really important decision. Utilities account for a significant part of your overheads, so minimising cost is crucial. Making a smart choice can also reduce the valuable time you spend on hold, or ironing out issues. Not only that, but the right company can reduce your impact on the environment, too.

That’s where independent business energy suppliers can really excel. They don’t have the brand awareness or market share of the Big Six, so they work extra hard to make their service the best, cheapest and greenest that it can be.

Here’s our roundup of the independent gas and electricity suppliers that are sending sparks flying in the business energy sector. We’ve sorted them into five categories – cheapest, most eco-friendly, best for customer service, most innovative, and the ‘best of the rest’ – reviewed a number of contenders, and chosen a winner for each. Read on to learn about our top picks…

The best independent business energy suppliers

During our research, we found the best business energy supplier for each of our five categories:

  • Cheapest supplier: Bulb
  • Most eco-friendly supplier: Bulb
  • Best supplier for customer service: Bulb
  • Most innovative supplier: Utility Warehouse
  • Best of the rest: PFP Energy

The 5 cheapest independent business energy suppliers

We contacted 23 independent business energy providers and asked them to give us a quote for a business using around 20,000kWh of electricity a year, based in North West London. These are the five independent suppliers which offered us the most competitive prices:


Straight away, we loved that London startup Bulb are so upfront about their tariffs. They are listed on their business homepage, with no jargon or complicated rates. They don’t lock commercial customers into 12 month contracts, and they don’t charge exit fees. And not only do they not charge exit fees, they will actually pay yours when you switch to them from another supplier who does. What’s more, their prices are also around 20% lower than the Big Six.

Trustpilot score: 9.8/10

Sample small business electricity quote: £2,120.01/year

2. D-Energi

Getting new customers is understandably the main focus of most energy suppliers. Perhaps that’s why we find it so refreshing to hear D-Energi’s commitment to offering existing customers their most competitive rates too.

Trustpilot score: 9.3/10

Sample small business electricity quote: £2,390.13/year

3. Extra Energy

Birmingham-based Extra Energy are very clear about their main advantage: price. They offer some of the most competitive fixed business rates in the market, but this sometimes comes at the expense of effective customer service and complaints handling.

Trustpilot score: 6.4/10

Sample small business electricity quote: £2,405.11/year

4. Corona Energy

‘Big enough to make things happen, small enough to be agile’. That’s the approach of UK business energy supplier, Corona. They have 20 years of experience in providing utilities to businesses of all sizes, and currently hold 14% of the industrial and commercial gas market.

Trustpilot score: 7.9/10

Sample small business electricity quote: £2,412.33/year

5. Robin Hood Energy

Robin Hood Energy was launched by Nottingham City Council. Their aim is ‘to make energy affordable for all’, and their positive reviews would suggest that they are achieving this. Customers seem to be especially impressed by their polite and helpful customer services.

Trustpilot score: 8.2/10

Sample small business electricity quote: £2,416.20/year

The 5 most eco-friendly independent business energy suppliers

All five of these energy providers supply electricity of which at least 99% is generated through renewable methods, including solar and wind energy. If your business has set green targets, partnering with one of these suppliers is a great first step:


As if we weren’t already sold on Bulb after they offered us the cheapest sample quote, they are also the ‘greenest’ independent company we reviewed.100% of the electricity they supply is produced through renewable means, as is 40% of their gas. It’s no wonder they bagged 7th place in the prestigious Startups 100 ranking.

Trustpilot score: 9.8/10

Sample small business electricity quote: £2,120.01/year

2. Ecotricity

As their name suggests, Ecotricity’s main selling point is their eco-friendly ethos. Their electricity is 100% green, and they were the first UK company to commit to this. Their gas is currently 12% green. With ambitious plans to build their own gasmills, the hope is that this figure will soon be 100%. Their rates are not always the most competitive, but they are still considered good value for money.

Trustpilot score: 7.4/10

Sample small business electricity quote: coming soon

3. SO Energy

Open SO Energy’s website and you’re greeted with a clean homepage and a simple slogan: ‘great value green energy made easy’. We like these guys already. They have signed up to the ‘Energy Switch Guarantee’, prioritising a hassle-free switch for new customers from their previous suppliers. They actually say the whole switching process should only take five minutes. SO liaise with your previous supplier and arrange the whole thing.

Trustpilot score: 9.5/10

Sample small business electricity quote: £2,460/year

4. Solarplicity (formerly LoCO2 Energy)

Solarplicity came from a background in solar energy, and now offer both gas and 100% renewable electricity to businesses and homes. Despite their claims of ease and transparency, their customer service seem to miss the mark.

Trustpilot score: 5.3/10

Sample small business electricity quote: coming soon

5. Yü Energy

The first thing that stands out on the Yü homepage is the number of awards that they have won. In 2017 alone, they scooped business of the year, and were finalist for best utility provider of the year three times at various awards. Their reviews, of course, aren’t always perfect. What we love, however, is how every negative review has been followed up by a member of staff with a personalised message of how they intend to help resolve the issue. It’s this attention to detail that ensures small companies have a chance to make it big. They plan to soon branch out into ‘Yü Water’, too.

Trustpilot score: 8.8/10

Sample small business electricity quote: £2,998.67/year

Top 5 independent energy suppliers for customer services

One thing that quickly became apparent in our research is that customers of independent business energy suppliers are more satisfied than those of the Big Six. In fact, all of these suppliers have a Trustpilot score of 9/10 or above:


We were pleased to see that Bulb’s customer service was on par with their competitive pricing and eco-friendly ethos. Their focus on providing a simple, streamlined and transparent experience is clearly paying off. To have a Trustpilot score of 9.8 is an incredible achievement.

Trustpilot score: 9.8/10

Sample small business electricity quote: £2,120.01/year

2. Affect Energy

Shoreham-by-Sea based Affect Energy are a company with a promise: energy that is simple, painless and great value for money. They boast an excellent Trustpilot score, and won a commended award for energy provider of the year at the Moneyfacts Consumer Awards 2018. Their website is easy to navigate, and you can submit your contract end date to be contacted nearer the time with Affect’s best offer for your business. One customer sums it up perfectly: Affect are ‘big enough to cope; small enough to care‘.

Trustpilot score: 9.6/10

Sample small business electricity quote: £2,120.01/year

3. SO Energy

SO Energy have signed up to the ‘Energy Switch Guarantee’, prioritising a hassle-free switchfor new customers from their previous suppliers, and promise that the whole switching process should only take five minutes. Their Trustpilot score is proof that they are not only following through on this guarantee, but supporting customers throughout their contract as well.

Trustpilot score: 9.5/10

Sample small business electricity quote: £2,460.00/year

4. D-Energi

As we’ve already seen, D-Energi offer some of the most competitive prices for new customers. However, it’s their commitment to offering equally competitive rates to their existing customers which has earnt them such an impressive Trustpilot score.

Trustpilot score: 9.3/10

Sample small business electricity quote: £2,390.13/year

5. United Gas and Power (UGP)

UGP are a relatively new UK energy supplier, and previously traded under the name ‘Lancashire Gas and Power’. UGP are a great option for a business of any size, particularly one that is looking for a provider for both electricity and gas as they offer discounts for dual tariffs. They don’t have standing charges on many of their tariffs, making it really easy to work out your costs. They also have competitive rates and an excellent Trustpilot rating.

Trustpilot score: 9.2/10

Sample small business electricity quote: coming soon

The 4 most innovative independent energy suppliers

‘Innovative’ may be a very broad term, but we felt the need to recognise the companies that are not the greenest, nor necessarily the cheapest, but are well on their way. They have often won awards for their innovation, and some are too small to yet have a Trustpilot score(although we have every reason to believe that their customer service is great). Some may offer quirky perks. Either way, these suppliers are a good bet if you want to partner with a forward-looking company:

Utility Warehouse

Utility Warehouse aren’t called a warehouse for nothing: they can supply electricity, gas, phones, broadband and mobiles for your business. They incentivise customers with cashback offers and partner discounts. For ‘gold’ customers (those who take four services) they also offer to pay any termination fees you encounter up to the value of £200.

Trustpilot score: 8.0/10

Sample small business electricity quote: coming soon

2. Opus Energy

Opus Energy have really been making waves in the business energy sector since their formation in 2002. In 2015, they actually broke the legacy of the Big Six, positioning themselves as the sixth largest business energy supplier. They scooped up the award of Utilities Provider of the Year 2017 at the British Small Business Awards, and have been features on The Sunday Times Grant Thornton Top Track 250 league several times. Their reviews, however, are a real mixture of ‘bad’ and ‘excellent’, suggesting room for improvement in some areas.

Trustpilot score: 3.5/10

Sample small business electricity quote: coming soon

3. Axis Energy

Axis Energy are a small, independent utilities, broadband and mobile provider. Being such a small provider, no Facebook or verified Trustpilot reviews are available. This has admittedly made it hard to assess how good their customer service is. However, they aim to answer all calls within 30 seconds, and their average wait time is only 16, so that can only be good news.

Trustpilot score: NA

Sample small business electricity quote: £2,529.18/year

4. Flow

Flow want their customers to know that they will not lock them into a fixed tariff. Variable tariffs are traditionally far more expensive than fixed ones, but that’s where Flow are different. They offer some of the most competitive variable rates on the market. They also give you the option to upgrade to a 100% renewable energy plan (the standard rate is 50%) for slightly more money.

Trustpilot score: 7.7/10

Sample small business electricity quote: coming soon

The best of the rest

There are several business utilities companies which are offering a good service, but didn’t quite come out on top for our chosen categories. Depending on where your business is based and its energy needs, any one of these companies could easily offer you the best deal and a reliable service.

PFP Energy

According to the Citizens Advice Bureau, PFP Energy have received the lowest number of complaints per 100,000 customers of any energy company in the UK. They do not display their business tariffs online, but their site is very modern and user-friendly.

Trustpilot score: 8.5/10

Sample small business electricity quote: coming soon

2. Yorkshire Gas and Power (YGP)

YGP specialise in providing gas and electricity to businesses.They may not have any Trustpilot reviews, but their number of complaints raised last quarter – zero – is testament to their commitment to providing the ‘finest customer service in the industry’. They also guarantee to beat your renewal price or give you £100. With promises like that, it’s no wonder they’ve set their sights on challenging the Big Six.

Trustpilot score: NA

Sample small business electricity quote: £2,612.46/year

3. Go Effortless Energy

Go Effortless Energy don’t have a Trustpilot score, making it hard to know how they are perceived by customers. In terms of trust indicators, we like that they display their prices clearly on their website. They have also published the details of their complaints from 2017. Well, complaint really – there was only one, and it was resolved in eight weeks. This is really evidence of a commitment to transparency and a high level of customer service.

Trustpilot score: NA

Sample small business electricity quote: £2,585.85/year

4. Crown Gas and Power

Crown Gas and Power want to push value and visibility for their commercial customers. A lack of online reviews makes it somewhat hard to assess whether they’ve managed to achieve this. Their website is a little old-fashioned but easy to follow, and they have a dedicated email and phone line, which can only be a plus.

Trustpilot score: NA

Sample small business electricity quote: coming soon

The energy suppliers that are falling short

During researching the best business energy suppliers in the UK, naturally we encountered some companies that, for whatever reason, seem to be missing the mark:

1. BES Utilities

BES Utilities specialise in providing commercial gas and electricity. They are committed to treating their customers fairly, and publish a report each year detailing the steps they are taking to ensure this is always the case. Despite this, their customer reviews leave a lot to be desired. In 2015, they were also investigated by Ofgem for misconduct and had to pay a hefty fine.

Trustpilot score: 1.0/10

Sample small business electricity quote: coming soon

2. Utilita Energy

Utilita offer ‘pay as you go’ business energy, with a ‘one tariff fits all’ approach. They also offer smart meters to monitor your usage. Unfortunately, reviews would suggest they are falling short somewhere along the line.

Trustpilot score: 1.6/10

Sample small business electricity quote: coming soon

3. Dual Energy

Dual Energy are keen to offer business energy solutions that are smart. They offer free smart metersto all their customers, allowing you to easily track what you’re using. You can also agree to a one or two year contract, tailoring Dual’s service to your own business needs.

Trustpilot score: 3.4/10

Sample small business electricity quote: £2,450.17/year


Choosing a business energy provider needn’t be the headache that it once was. The prices above are only estimates for an imaginary, North London based company. Rates will vary hugely depending on region, supplier, usage, contract length and meter type. To get the best deal for the specific needs of your business, it is always worth getting quotes from a variety of suppliers. And remember – with so many providers on the hunt for new business, you are in a powerful position. Don’t be afraid to negotiate!

Julia Watts Content Manager

Specializing in the complex realms of telephone systems, business energy, vehicle tracking, asset tracking, and fuel cards, Julia writes content that cuts through the noise to help you find the right solutions and technologies for your business. Having spent five years working across the dynamic world of entrepreneurship, she loves helping exciting ventures – big or small – to flourish.

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