Riverwalk
I pay by DD but just £50 and then pay the extra when the monthly bill comes in, this way I get the DD discount but no extra money is sitting in their account.
I'm with Octopus and send a monthly reading.
They put the DD up to £95 and I just went into my account and reduced it back to £50. I'm not sure if other companies' web sites allow this.
The important thing about a fix rate is what they are charging you per kWh, not what they set the DD at... the DD can always be reduced according to your usage.
It's easy!
My Mum is with British Gas. It seems they won't allow that.
She is still on a fixed deal, but it will end at the end of July. A couple of weeks ago, they announced that they were increasing her direct debit from £60 to £140 for the remainder of the contract.
I've checked her account, and she is still in credit (just), so I can't see how they possibly justify that increase now, in the summer months when her usage is not going to be high.
I tried to lower the DD online to what I am sure would keep her in credit, but 'the computer said no'. It said it would only allow me to raise it!
Between us, we've decided that it isn't worth ringing BG about this. Her bills will shoot up anyway when the deal ends, so it might as well be in her energy account in advance to offset some of that.
In answer to those who keep asking why people don't just pay for what they've used each month, it's because for many people, it is far, far easier to spread the cost over a year, rather than suddenly having to find many hundreds of pounds to pay a bill after a particularly cold winter month.