In previous years, we have seen instability in energy tariffs, affecting top energy companies in UK. To pass this critical time, most energy companies have ended their energy-saving deals. And if you are one of those who don’t like switching then it’s possible you are overspending 30% approximately £300+ a year on energy.
Switching is an easy step, but choosing energy suppliers for business from a list is not a piece of cake. In this blog, we will navigate you on how to choose the right utility suppliers in 2025 to save you hundreds.
Why Switch Energy Providers in 2025?
Loyalty with energy companies only gives you high rates bills, not any reward. You should yearly compare your contract with other utility providers’ deals. There can be a chance that the energy supplier will keep you on a variable tariff when you can save an amount on a fixed tariff deal. For example, Ofgem will increase the tariff cap by 1% from January 2025. If now you are on a variable tariff or your fixed tariff contract is going to be finished, due to this you will get high news.
The other reason can be customer service, especially if you are running a business. Any company cannot run without energy, and not getting a response from the support team is most irritating. Many companies are there that mention they are providing the best customer service but when you search the facts say otherwise. By switching, you can find the cheapest energy supplier with a dedicated account handler.
Top Energy Companies of UK in 2025
The UK turned toward green energy making it complicated for consumers to choose from various options. Last year the energy companies launched 76 new projects to comply with renewable policies. Following is a list of the top energy companies in the UK for commercials:
EDF Energy
It has a diverse portfolio in the UK energy sector providing electricity and gas to commercial industries and households from the previous decade. With a focus on new Ofgem policies, the company also initiated significant investment in renewable energy. EDF Energy’s commitment to providing reliable, affordable and low-carbon energy solutions makes it the most trusted utility company.
British Gas
The most historic energy provider in the UK with vast experience in the industry British Gas is also a top energy company. It provides electricity and gas to residential, industrial and commercial customers, along with appliances such as heat pumps or smart meters. But if you are a small business you must have to compromise the customer service due to the lack of availability of 24/7.
Maxen Power
If you are running a small company and looking for a customer-centric energy partner then Maxen Power is for you. They are making significant investments in green energy and focusing on expanding energy sources towards renewables such as wind, solar and biomass plants. With all of these, they are also offering dedicated account handlers who support your business energy. For small businesses, they are providing long-term fixed tariffs to protect them from price fluctuations, which makes them the most reliable and affordable for SMEs in UK.
E.ON
The energy company that is operating in multiple countries including the UK. As one of the highest revenue-generating energy companies in the United Kingdom, it provides electricity and gas to residential, industrial, and commercial areas. E.ON is also involved in different green energy initiatives to give their customers affordable green tariffs. With a commitment to Ofgem policies E.ON Energy aims to provide customer efficient customer service complying with renewable regulations.
SSE
Scottish and Southern Energy company is also one of the Big 6 in the UK and a leading generator of renewable energy. It has its own onshore and offshore renewable farms to help the government achieve net zero by 2025. With over 70 years of experience, they also provide energy to residential, industrial and commercial spaces. They have more than 10,000+ employees in the UK who are committed to making a better world for customers.
How to Choose the Right Business Energy Supplier in 2025
Only knowing the top energy companies in UK is not enough to choose the best energy supplier. There are some key factors that you should check before switching:
Calculate Energy Consumption
Before switching you must read your energy bill and break it down into parts. That’s how much your energy consumption is; to calculate that, you can use the traditional formula: for electricity supply costs (in kWh) use this (total watts x hours) / 1000 = kilowatt-hours and for gas you can use the following For peak demand (in kW): Total wattage of all simultaneously running motors / 1000 = peak kW. If the smart meter is installed then you can easily read your energy annual consumption from this or it can be the reason you are switching.
Understand Tariff Rates
The next step is to research the tariff and contact your current energy company to find out which contract you are in. Because there are three types of tariff energy suppliers offer, the fixed tariff is more convenient for small businesses that have low energy consumption. The variable tariff in which the price fluctuates with the market and is unstable. The last one and the most expensive is the deemed tariff. It’s most likely that if you never change your tariff, you are on this rate.
Switch Energy Company
Once you know your energy consumption and the contract that aligns with it. Then finding the best energy company for your business is an easy step. You only have to call anyone from top energy companies in the UK and start your fixed tariff, but ensure if you have a small business, do not try Big 6. Once you have signed a contract with a new supplier, it will take 5 to 7 days to switch depending on the energy provider you choose.
SMEs have continued to face various challenges since the 2021 crisis in the energy sector. However, there are businesses that have managed to switch and cut their extra costs. But we advise first following the previously mentioned steps and then choosing the best energy provider in UK according to your needs, to not get any more burdened from your business energy.
