Energy firms have been competing for new business with a succession of ever-cheaper online plans, which could cut an average yearly spend of £1,200 to £900.
Beware switching suppliers via a door-to-door salesman or in response to a provider’s mailshot - you are unlikely to be offered the best deal on the market.
There are a range of free online comparison services, including Moneysupermarket, Uswitch and Energyhelpline.
As well as changing to an online tariff, “dual fuel” plans and paying by direct debit are worth a look.
Get cash back
Some comparison sites offer cash back to users who switch energy suppliers. But by changing providers via specialist shopping websites such as Topcashback.co.uk or Quidco.com, it is possible to earn more cash back - up to about £70.
So first use a comparison service to find the cheapest supplier, then check a cashback site to find out if it will pay a bigger rebate.