The AAC exit fee is $10M and 27 months notice. UConn upped the exit fee to $17M and left with 14 months notice.
UCF, Houston and Cincy want to leave at 23 months to be ready to join the Big 12 for the 2023 season. Given that it likely costs them something between $12-$15M apiece to shorten that notice by 4 months.
So the question is if that extra $2M-$5M is worth it to go to the Big 12 a year earlier (considering that the $10M cost exists regardless of when they leave). Which is honestly, not much different than the situation we find ourselves in at BYU, considering that every year earlier we go requires buying out a few more games and costs a couple million.
Also worth noting that the AAC has already announced backfills for those teams and anticipates them arriving/starting AAC play in 2023 and it's pretty much a done deal that the AAC teams will be there by 2023. The only question is how much the cost ends up being in that range. If it's $12M per school, that means the 8 remaining can split it and get $4.5M each. If it's $15M per school, that gets the remaining AAC teams each $5.63M