He only has 20% stake. If you put in 40 hours a week into the project, then he should only be expected to put in 8 hours per week. Now of course, if you only p

He only has 20% stake. If you put in 40 hours a week into the project, then he should only be expected to put in 8 hours per week. Now of course, if you only put in 20 hours a week, which is pushing things when doing this consistently on top of a full-time job, then he should only put in 4 hours to be comparable to you. That said there's an inflection point with money. If you do a proportional split of the profits, it may be that you earn enough to make it feel worthwhile still to push yourself whilst he is still earning so little he doesn't feel that it is more than a side-project. One simple way to solve this problem of commitment would simply be to pay him for his hours to bring him up to the same profit that you are making. Even if he has only 20% of the company, right now he can get 50% of the shared profit.