This question already has an answer here:
I work for a small company (me, my boss, and a third guy, but he only helps us sometimes) in a relatively small town where I work for half, or 3/5, of the money which I could earn in the capital. It's not much but because I live at home it's not the biggest problem.
There was a 9 month project where the goal was to finish the application, which we succeeded. My boss told me in the 5th month, that maybe after the 6th, but after the 9th month he will give me a raise. The 9th month is done and the project is at the level where it should be, but in the past weeks he has never mentioned the raise. Ok, the application still not for sale but there are already potential buyers.
I think this project is worth more than my salary but I understand that my boss could not pay more for a "we-will-see-if-it-works" project. But now after 9 months, after I worked almost alone and he mostly only told me the way, I think I deserve more. I would also like to move out from my parents soon so there are reasons, but still I don't want him to feel like "he gives me more or I'm out". Should I tell him what I wrote here, or try it from a different angle?
Note, that we (my family) never had much money, so asking for more money is always a bit strange to me.