@adrian- You can read your meter (If it's not a smart meter) and submit the reading and compare it with the readings you have taken yourself. Now $400 is not a lot, only $4.44 a day. You saying you have "been over estimated", would indicate that you do not have a smart meter. We are 2 Adult people living in a 4 bedroom house, our daily usage is 5.12 Kw per day, our projected bill (we are 25 days into this billing cycle) as we download our usage data regularly and can decipher it, our projected ...