I'm looking for a word (or, if no single word exists, a short expression) that includes anything that is not your base salary (e.g. overtime, bonuses, sale commisions). If possible, I would like it to not require any additional context (so "Hey, I got my x today!" could be understood, even if it sounded awkward).
I think you are looking for the expression cash in hand:
If someone is paid cash in hand, they are paid in notes and coins so there is no written record of the payment.