According to the annual Advertising Age survey, NBC's has the highest thirty second advertising spot cost at $434,792. Last year's champion, 's took quite a haircut this year, according to the survey, down to $326,685 per 30 second spot. That's more than a $100,000 per spot down from last year's survey, and last year there was a steep 's premium versus of over $100,000. This year, 's is only about $8,000 more expensive than Housewives' $318,552.
CBS's top show is, at $262,600. Fox's top show for the fall is at $343,000, but keep in mind is airing all season with half the amount of normal commercial spots. House (which airs with the full slate of advertising) is next highest for Fox at $260,179.
CW's highest-priced show is America'sat $103,714 - well ahead of anything else on the CW ( is next highest at $67,902 and pulls $62,139 according to the survey). The Game on Friday nights has the lowest price of anything this fall according to the survey at $29,583 - that's even cheaper than the 8pm Saturday block of Crimetime Saturday reruns on CBS at $32,600.
You can download the full list here (PDF file).
For comparison, here are the numbers from the same Ad Age survey last year.