The most recent contract extension reportedly calls for Notre Dame to be paid $15 million a year until 2025
http://www.nytimes.com/2015/09/12/opinion/joe-nocera-notre-dames-big-bluff.html
This is from 2011, prior to the renewal of the contract from 2015-25:
"Unlike the other 13 schools on the list, Notre Dame is able to turn a profit without being part of a conference. They have their own lucrative television contract,
rumored to garner them about $15m a year. However, Notre Dame finance professor Richard Sheehan, who was involved with the NBC negotiations, has said the rumored value is low. “The NBC contract is more lucrative than pretty much anyone knows,” he says."
http://www.forbes.com/sites/sportsmoney/2011/04/19/how-does-notre-dame-do-financially/
There is some lazy reporting out there that runs that number for the renewal as well. Does anyone really think that ND signed a locked in ten year deal with NBC for no increase (at a time when other TV contracts are expanding)?
The 2005-10 NBC deal was for $9 million/yr. The 2010-15 deal was for $15 million/yr. The new deal is for more money, ND sources have rumored it to be around $20-23 million.
It really doesn't matter. Purdue and Illinois will make multiple millions per year more in TV money. ND isn't interested in making the most TV money. The NBC contract is the vehicle that allows it to remain independent in football and have all of its games televised every Saturday OTA (which is a big deal to ND).