I pay my supply house in full each month by the 10th. Saves me 2%. The way I look at it is the supply house did their part of the agreement by delivering the merchandise. Now it's my turn to do my part and pay them.
I wish my supplier gave a discount for early payment. Since they don't, I pay them on the last day of the following month by credit card. That gives me another 3 weeks of credit (total of 7 weeks) and when the credit card statement comes in I pay it out right away.
I did get an explanation from my supplier what happened to get double billed, along with a credit. Until I set up a system to track their invoices I will just have to be more diligent in reconciling at month end.
Thanks for all your responses.