They may not be traditionally associated with home energy supply, but after an alliance with British Gas during 2011, Sainsbury’s now offer some of the most competitive deals on the market. Sainsbury’s tariffs are structured in the same way as those from British Gas, but there are slight variations in the rates. Customers benefit from Nectar point bonuses that can be redeemed online or in-store, and with services such as Sainsbury’s Finance also available, it’s possible to consolidate a number of essential household services with one supplier. However, Sainsbury’s offer only a few of the eco-friendly products and services provided by British Gas, so if you’re environmentally conscious, you may be better off looking elsewhere.

Sainsbury’s Standard tariff is the most expensive of the three, but offers the most flexibility. You can choose to sign up for supply of gas, electricity or both, and can also choose whether to manage your account online, or receive statements through the post. Like all Sainsbury’s tariffs, payment is made monthly by Direct Debit, which is initially calculated based on your estimated usage. There’s also no cancellation fee, so you can always switch to another tariff or supplier if you change your mind.

The cheaper Online Energy tariff offers the same flexibility in supply of gas or electricity, but requires you to sign up for paperless billing and manage your account online. Again, bills are paid by Direct Debit, and there is no cancellation fee.

Sainsbury’s cheapest available tariff is currently the Online Price Freeze, which protects you from rate rises for up to 18 months. Your account will be managed online and paid by Direct Debit, but to make use of the service, you’ll need to sign up for supply of both gas and electricity. The average monthly dual fuel spend is significantly lower than the two other tariffs, and with rates set in stone until the end of the deal, the tariff offers security as well as a low price.