Monthly bill quote

Hi, I’ve been given a quote for monthly DD. Is the quote fixed or does it change each month depending on how much I use and the meter readings I provide? Many thanks -Steve

It remains fixed - until it changes!
The quote will have been based on an estimate based on your property type, or a more detailed one if you provided historical usage figures when you signed up.
As time goes on, and your actual usage figures build up, Bulb may suggest a revision up or down, or you can change it yourself via your online dashboard.