Question: It's a bit out on the horizon, but in the not too distant future we're going to be implementing a payment system that charges a % of the transaction t

Question: It's a bit out on the horizon, but in the not too distant future we're going to be implementing a payment system that charges a % of the transaction to us. For example: $110 payment in, $100 to seller, $10 to us. I've had a real problem finding a recurring billing company that allows payments to be split like this. Any suggestions?