I saw many people at Digital Point and WebMaster World complaining about their Adsense income drop over the past few months. People attributing it to the worldwide economic depression. The proof is here now.

Google has released its 2009 Q1 earning statement recently. Amidst all the complex jargon, two stats are of particular importance to all those affected by Google Adsense. Google Network Revenues and TAC – Traffic Acquisition Costs.

Google Network Revenues are the partner sites generated revenues. The partners include major establishments like Ask.com, New York Times etc and all bloggers and small sites owners. This can include revenues under other programs as well.

TAC – Traffic Acquisition Costs are the portion of revenues Google has received only with Adsense programs.

As the graph below shows, TAC is on the decline since Q32008. This means Google is earning lesser by every quarter through its Adsense Program.

Google earning has a direct bearing on the publisher earning, hence you may be seeing lesser moolah through the Adsense on your site.

All in all, don’t fret if you are seeing a lesser amount in your account everyday. It’s happening with everyone!

PS: If you want to explore programs beyond Google Adsense, here is a pretty good list of adsense alternatives.