We've stopped using loads of things, reduced usage so much but it's not making any difference.Thanks. Just worked out what mine would cost using those rates against my latest annual usage. It comes out at £5132.35 a year and that's with just 2 adults in the house and my electric usage over that 12 months was less than it normally is so where they're getting average annual usage figures from to come up with these typical annual price cap estimates for families with children I've no idea. Granted those unit charges you posted are slightly higher than what they're estimated to be but even so, there's not a chance that your average family of 2 adults and 2 kids is "only" going to be paying £3500+ per annum from October, £4400+ per annum from January, and £5000+ per annum from April. In many cases it's going to be a lot more than that.