With the gas and electricity bills continuing to rise, many people may look to compare energy prices to see if they can get a better deal.
As the days get colder and people find themselves relying on central heating more, seeking out the best available tariffs could be especially important at this time of year.
However, individuals who perform this activity using energyhelpline.com this month may not only get the benefit of cheaper gas and electricity bills, but are also in with a chance of winning a year's supply of energy free.
Anyone switching tariffs or suppliers though the website or over the phone during December will be entered into a free prize draw, with the randomly selected winner receiving the cash equivalent of 12 months of average energy bills.
According to Ofgem figures, this is currently £780 for gas and £585 for electricity only bills, but if a person switches both using energyhelpline.com, they could win £1,345.
Make sure you're not paying too much for your energy - compare gas and electricity prices now at energyhelpline.com or call 0800 074 0745