I looked into this recently. I think you will find that they...

  1. 2,299 Posts.
    lightbulb Created with Sketch. 90
    I looked into this recently. I think you will find that they simply work out your average bill for the year and divide it into equal payments. If you use more or less than planned the difference will be caught up later.
 
arrow-down-2 Created with Sketch. arrow-down-2 Created with Sketch.