I pay my credit card bills online. Say my credit card balance is $150 and I decide to pay $200, to have a $50 'credit' on my account. Does this hurt my credit score?
The only reason I would do this is that my billing date is coming up and only a few of my transactions have posted to my account. I know these will be posted sometime before the billing date and I'd like to keep my balance on the card low. Other than that, there's really no point in paying more than you have to. Also, Citi does indeed let you type in a custom amount that you'd like to pay, even if it is high than the current balance.