For me it is not really clear this passive income stuff in terms of tax laws and relation with employer.<p>Now I am based in Netherlands and my employer put in the contract quite big fines for anything I would do on my own or for some other party. So I would have to get written consent from my employer, this one is clear. But for anyone else check your contract ;)<p>Second thing is for instance you get money from Android app, or from users. How would you go with taxes, you have income so you have to pay taxes. Beeing sensible for some beer money they won't get after you. But having 1000 euros a month could lead to some nasty stuff like questions where did you got that money and why you didn't tell to your beloved country...<p>I think all those passive income gurus are not mentioning a word about this side of things. Does anyone has any experience on legal side of passive income?<p>Charge in bitcoins only? :D