I find that my score drops roughly twenty points, and stays there for a couple months any time I've got a zero balance on my credit card on statement day.
I returned an $1,100 generator in January, resulting in an enormous negative balance on statement day.
I suspect my credit score will be down to zero this month because of it.
As a general rule, I pay my credit card off three or four times a month, making sure to leave five or ten dollars on there for statement day. It costs me zero interest to do this. It's just stupid that I need to do it.
I don't thing they do, as doing so does not result in zero balance on statement day, nor does it require paying the card 4 times a month, nor does it incur interest. Unless they just like doing things the hard way then complain it's stupid they 'need to do something' they don't need to do.
I basically never have a balance on my statements, but score has been stable at 821 for many years. I even got a car loan this month and it only dropped to 817.
Yeah, keeping a small amount on the card will help, but that's really only to eek out a couple of points. I don't bother trying to min/max that much and my credit is 821/823 TU/equifax
Mine is generally the same as yours, but I can track back for years and see correlation with drops down to 800 or even 790 every month I've ever had a zero balance. I mean, it's really all vanity, but I had shit credit when I was young, so it's wired me to constantly monitor my score in my later years.