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- Its parent company invests in renewable generation
- Offers half-price electricity every Sunday
- Customers find its website easy to use
- It’s not one of the most trusted suppliers
- Slow at resolving complaints
British Gas is the second-largest energy supplier in Great Britain, supplying 20% of the electricity we use in our homes and 27% of the gas. British Gas now has over 7.5 million domestic customers.
It was one of the original “Big Six” energy companies that used to supply all our gas and electricity. However, the energy regulator Ofgem has stopped using the term as rival suppliers have become more dominant.
Ofgem now groups all “large” suppliers, those with a gas or electricity share of at least 5%, together. Six suppliers, including British Gas, currently hold a 91% share of the domestic energy market in Great Britain.
British Gas won nothing in our Expert Reviews Energy Awards 2026 but came second in the Best Website category. It finished fourth overall out of the seven suppliers we rated and had the fifth-highest percentage of customers who said 10 on a 1-10 scale when asked how likely they are to recommend it to others, at 20%. This is much lower than Octopus Energy, our overall winner; 35% of its customers gave it a perfect score. British Gas ranked fourth for customer service.
To find the best energy deal for you, visit our guide to the best energy suppliers.
What kind of tariffs does British Gas offer?
In addition to a standard variable tariff, it offers a fixed tariff and one that tracks below the price cap. It also offers an EV tariff that gives you cheaper electricity at night.
All suppliers with at least 150,000 customers must offer at least one Smart Export Guarantee (SEG) tariff. This pays you for exporting unused electricity you generate, such as from solar panels, to the grid. British Gas doesn’t offer any additional export tariffs.
Does British Gas offer good value for money?
British Gas finished fourth for value for money with middling ratings. 23% of respondents were very satisfied, compared with 30% for the highest-rated supplier, Utility Warehouse. Only 11% said they were dissatisfied or very dissatisfied.
It was also the fourth-most trusted supplier in our survey, with 22% of customers saying they completely trust it to act in their best interests. The winner, Utility Warehouse, had 33% of customers saying this.
How good is British Gas at handling complaints?
According to the latest data from the energy regulator Ofgem, British Gas received 957 complaints per 100,000 customer accounts. This was slightly above the industry average of 936, putting it third for complaint numbers among the providers in our survey. The provider with the fewest, Octopus Energy, received 476.
It resolved a fairly poor 42% of them by the end of the next working day and 86% within eight weeks. This compares with 84% and 100% respectively for the supplier that resolved complaints quickest, Utility Warehouse.
Ofgem complaints data
| Complaints per 100,000 customer accounts | Industry average complaints per 100,000 customer accounts | Complaints resolved by end of next working day | Complaints resolved within eight weeks |
| 957 | 936 | 42% | 86% |
Notes: Data is for Q2 2026.
How clear are British Gas’s bills?
British Gas finished third for bill clarity, with 27% strongly agreeing that the provider makes it simple to see exactly what they’re being charged for and why. This figure was 30% for the top supplier here, Utility Warehouse. The lowest-rated provider, EDF Energy, had just 17% who strongly agreed.
How easy to use are British Gas’s website and app?
Customers thought British Gas’s website was relatively easy to use compared with its rivals. Around a third (34%) said its website was very easy to use compared with 41% for Octopus Energy.
A similar proportion (33%) found its app easy to use, putting it third, versus around half for Octopus, the top provider in this category.
Should I choose British Gas?
British Gas does well for its website, but it’s only the fifth-most recommended supplier and isn’t well rated for value for money, so it isn’t one of the best in our survey.
You’ll get better overall service elsewhere, such as from the top provider in our energy awards, Octopus Energy, and runner-up Utility Warehouse.
