Are you going to be dividing up the work from the one account? I would think if you will both be doing the work you will have to find a way to determine how much each of you are doing. Like is it 50/50? or is it more like 75/25? Since it sounds like you are the one who is getting the contract, you may want to get something for that. So even if the work is split 50/50 you may want to take a higher cut? We did this once a while back but it was when we were charging a %. We didn't do any of the work, just got the account. We took 1% and gave the service doing the work the rest.