As the saying goes, half of something is better than all of nothing. If he'll make the difference between the project being a hobby and being a real business, t

As the saying goes, half of something is better than all of nothing. If he'll make the difference between the project being a hobby and being a real business, then my take-it-or-leave-it advice would be to be generous with the stock, but that's just the way I roll, your milage may vary. That said, one way to think about splits is to look at the number of hours you've invested, assign a dollar figure to those hours, and treat it like you've made a capital investment and use that as a basis for determining/justifying a split.