My credit rating has been rubbish for years due to some big mistakes earlier on in my life. 10 years later I'm trying to improve matters. I have revived an old bank account and got an overdraft that got used and paid off all in the same day. I now have a credit card with them and have purchased about £500 worth of stuff. I have the money in my account to pay this off but wondered, for building up my credit rating, if it would be best to pay it now or later on when the statement comes through.