When you click the amount of XP you have in the top right corner it should say something like "5,126 XP needed" So it tells you how much XP you need for the next level Then if you click it again it will go back to the original.
I agree with this. I'm tired of going to the useless shop section that gives me no goods just to see how much XP I need. Good. Also for deluxe members, putting a cursor on your name at the top left corner should tell you when it expires. not very needed, but sure.