" is asking about something that has already happened. " is asking about something that is happening now (or whose effects are perceived as happening now) or will happen in the future. " may emphasise the speaker's surprise at the fact that he got a bonus or the speaker's opinion that he didn't deserve one, and/or it may indicate uncertainty about whether it has been decided that he will get a bonus.
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.