Globally, Facebook ads cost 21 cents per click in the fourth quarter of 2013 when purchased on a cost-per-click basis. The average cost-per-click for Facebook ads (when purchased on a per-click basis) increased 24% in 2013, world-wide. (this is not a surprise. Popularity always increases costs. The same thing happened with Google and Yahoo! PPC ads, back in the day) The average cost-per-click for Facebook ads increased 24% in 2013 (click to tweet) Globally, Facebook ads cost 75 cents per thousand impressions in the fourth quarter of 2013 when purchased on a CPM (impressions) basis.