All billpayers have been advised to do the same thing before March 31 by money saving expert Martin Lewis.
Martin has said it's important for everybody to check their meter readers as bills are set to increase dramatically.
Ofgem, the regulator, has confirmed it is increasing its price cap by 54% from April 1. It will see the limit a supplier can charge for each unit of gas and electricity increase, meaning a rise of £693 on bills from £1,277 to £1,971.