From CollegeFootballPlayoff.com:
(3) A conference will receive $6 million for each team that is selected for the semifinal games. There will be no additional distribution to conferences whose teams qualify for the national championship game. A conference will receive $4 million for each team that plays in a non-playoff bowl under the arrangement (in 2014-2015, the Cotton, Fiesta and Peach Bowls).
(4) Each conference whose team participates in a playoff semifinal, Cotton, Fiesta or Peach Bowl, or in the national championship game will receive $2.08 million to cover expenses for each game.
So, the short answer is $6 million, but it's more like $2 million if we get our champion in the NY6 without bumping someone else from the SEC out.