Talk:XP Farming/@comment-25386610-20160123153751/@comment-26044650-20160123154648

I do not know the specifics, but when you overcome a milestone (9-10, 19-20, 29-30, etc) the required XP to level up drastically drops, but will climb back up past the XP you needed to meet the last milestone the closer you get to the next milestone.

Think of it as a zig-zag on a chart, just like this one.