<human>: So usually how you pay your electric and gas (E&G) bills is in advances. Recently my electricity usage doubled. Which led into almost the double of "adviced" monthly advance on the bill. My question would be here, what keeps me from reducing their advances on the E&G bills to the lowest possible?

Of course you would have to pay the difference back. My reasoning is that you could invest the money in the meanwhile. I havent found a price surcharge anywhere for the difference. I am not smart enough to deal with this, so I am asking you for help?

Condense the text into a few key points
<bot>: Question: Does cutting the advances on E&G bills cost you more or less money at the end of the year?