Experience Point Cost

Ghouls: Fatal Addiction (Ghouls: Fatal Addiction, p. 85)

This is the iformation that you need and we follow this expenditure to the tee.

* As a general rule, a vassal gets a cost break when the actual Disciplines of her first domitor's clan (so, while a Toreador may know Dominate, it is not considered a clan Discipline for purposes of experience points). A revenant gets a cost break on the Disciplines of her family, while an independent gets a cost break on Potence, Celerity, and Fortitute.
A vassal who leaves a vampire's service is treated as an independent from that point on, while an independent who becomes Blood Bound to a domitor is treated as a vassal. So, yes, it is possible for an enterprising player to 'minimax' this system - but the dire ramifications of dealing with the Kindred in this fashion should make the point moot.