Long story short, my friend and I have started a side-project and we have different responsibilities in this project.
I am the developer, doing technical stuff. My friend is a sales person and manages sales. Our goal is to split the proceeds 50/50.
However, since we don't work full-time on this and have normal jobs, it is likely that we don't spend equal time on this project. I'm especially in charge in the beginning, while my friend will have a lot of work later on. Of course there are also tasks both of us can do.
After a year or so, it might turn out that one of us spent double the amount of time than the other.
Should we split the proceeds according to working hours? Or should we define a fixed hourly rate, which will be subtracted from the revenue before the proceeds are estimated?
How do we make sure that both of us get a fair pay?
With the first approach I fear that one of us might earn too less, even though we are both vital for the project's success.
Please note, we both have founded separate businesses, so we are more of a work group than a single entity. We might found a company together if the project is successful, but for now my company "owns" the project.