I have a FUSA account and changed the due date to coincide more closely to my monthly pay period. This pushed it back by one week. I just received a statement with enormous interest. The statement lists the average daily balance used to compute was over than $3000.00 more than the highest balance during the period. I made 4 payments during the payment period totaling over $1100.00. I wrote FUSA via the e-mail contact on their site and seem to have received a form letter telling how they figure finance charges. Can anyone help me figure this out? I realized that adding 7 days to a pay period would change things but I didn't expect my interest to be so much or for my average daily balance to be so out of whack.