Tippett had initially planned to contest the two charges he faces, but is now leaning towards a guilty plea in unison with Crows officials, according to reports in The Age.
The club, chief executive Steven Trigg, football operations manager Phil Harper and his predecessor John Reid will also appear before the commission.
The hearing gets underway at AFL House from 8am and is expected to be completed within the day.
Tippett has reportedly agreed to a suspension of 10 to 12 premiership matches, while Adelaide are set to be banned from the first two rounds of next year's national draft.
Both Tippett and Adelaide are likely to be fined, with Trigg and Harper also at risk of lengthy suspensions.
Reid retired from his role in late 2009 and no longer works in the game.
The Crows, Tippett, Trigg, Harper and Reid must answer to a total of 11 charges in relation to an alleged breach of the total player payment rules and conduct prejudicial to the AFL draft.
The charges stem from a secret agreement that formed part of Tippett's contract with Adelaide in late 2009.
It's been a really, really long six weeks for everybody, Trigg said when he arrived in Melbourne on Thursday.It's been demanding on the footy club and we're looking forward to tomorrow, to be able to put it behind us.