IF you had an actual written contract which guaranteed you the raise as of a certain date, they'd have to honor the agreement and give you the raise then.Without an actual written contract, there is no right to a raise--employers never need to give you a raise and if they choose to give a raise, have full discretion to decide when to do so; they can go back on or renege on the timing they asserted earlier. Because there is no right to a raise and it is discretionary, it is legal to elect to delay it until after your leave.