From USA Today

The return, which the conference provided in response to a request from USA TODAY Sports, also shows that Big Ten had $338.9 million in total revenue for a fiscal year that ended June 30, 2014 -- its final year with 12 schools. That represents a more than $20.5 million increase over the conference's revenue for its 2013 fiscal year. (Under IRS rules, a non-profit must report its revenue and expense data based on its fiscal year; but it must report compensation data based on the calendar year completed during its fiscal year).

The Big Ten expanded to 14 teams at the beginning of the 2014-15 school year, with the addition of Maryland and Rutgers.

Its revenue for its 2014 fiscal year was about $13 million greater than that of the 14-team Southeastern Conference, which reported $325.9 million in revenue for a fiscal year that ended Aug. 31, 2014. The SEC's revenue for fiscal 2014 did not reflect any of the change in revenue being triggered by the start of the SEC Network this past August.

The Pac-12 reported just under $334 million in revenue for its 2013 fiscal year.

While the article points out the SEC numbers did not include the SEC Network, neither  did it include the BTN increase in the New York or Washington markets moving from sports packages to basic cable. In most cases, that is going from ten cents to nearly a dollar per subscriber. 

The results for this year ending June 30 will be interesting. And the B1G hasn't been to bat yet with a new TV contract beginning in 2017-2018.