My suggestion is that you set up a class for each partner. Record income and assign a class. Set up an expense account for guaranteed payments. When you write a check, also assign a code. You can also apply a class to expenses either 50/50 for general company expenses or 100% to one partner if it is only related to one partner such as job supplies. You can then run a P&L by class to see each partner's total income and total expense. The cash in the bank would then be distributed by percentage of total.