A friend and I have been working on a videogame for a while and, we may end up selling it in the future

However, we've got no idea on how we could go about splitting the game's revenue between the both of us

None of us have any experience with selling anything, and I'm not really sure on how online payments work yet

Would just checking how much the game has made monthly and going “this much for me this much for my other friend", like having a set amount for each one (like 40/60)?

Or is there a better way that doesn't involve checking every month?

toasterpower said:
Or is there a better way that doesn't involve checking every month?

Discretionary payments. The agreement can state the intent but make the frequency and amount discretionary by the ownership of the business.

Assuming the project becomes successful and actually makes a profit, you'll probably want to figure out some way to establish the value each person contributed. It will likely depend both on time and the individual contribution. In most workplaces that looks like an hourly rate multiplied by the hours worked, but in a small project usually there isn't that much money.

Making it discretionary means you don't have to keep legal evidence that you did it every month like clockwork, and if for some reason someone leaves or becomes impossible to communicate with or dies, you can adjust payments to other remaining people versus maintaining an account for them (or their heirs).