AdSense revenue share

For displaying ads with AdSense for content, publishers receive 68% of the revenue recognized by Google in connection with the service. For AdSense for search, publishers receive 51% of the revenue recognized by Google. These percentages are consistent, regardless of a publisher's geographic location, and are not in any way averaged between publishers. We don't disclose the revenue share for other AdSense products; the revenue share varies for other products due to different costs of developing and supporting these products.

You can view revenue share details in your account:

In the "Account information" section, you'll see each revenue share displayed next to "Active products."

We believe our revenue share is extremely competitive. However, revenue shares alone can be misleading, so we encourage you to focus on the total revenue generated for your site. For example, if Google’s auction of ad inventory on your site generates $100, with our 68% revenue share you'd receive $68 through AdSense. Another ad network might offer an 80% revenue share, but only collect $50 from advertisers, so you'd receive $40.

With the vast number of advertisers competing to appear on AdSense sites, our system ensures that you're earning the most possible for every ad impression you receive.

SOURCE:  support.google.com