Assessing Monthly Payment

I have been assessed by Bulb that my charges for next year based on this years consumption will amount to £1157.37. This amounts to £96.44p per month yet they are asking me to pay £114. per month. Can anyone explain the reason for this. I have increased my direct debit to £96 per month which is what I am prepared to pay based on the annual consumption figures.

We base our projections on the information we have on your account - if you have added meter readings lately then these estimates should be fairly accurate, but keep sending in readings so we can make it as accurate as possible.