Have you ever wondered how much of the Adsense revenue you actually receive?

According to conference calls for FM Publishing’s network publishers (boingboing, metafilter, etc), obtained by Valleywag, the magic number if 43%. The FM Publising business guys claim that Google takes a 15% ad serving fee off the top, and then gives the publisher 51% of the remaining 85% of total revenue. To get the full details, you can listen to the call.

Google is making a huge margin from Adsense. I can only hope that Yahoo and Microsoft will gain some momentum with their contextual ad efforts and help push a greater share of revenue to publishers.