The Batman Begins actress announced the end of her five-year marriage on Friday (June 29) and has been reported to take between $15m (£9m) and $20m (£12m) away from it.
However, sources have told TMZ that this estimate is "absurd" and Holmes will have to negotiate a complex agreement that will leave her with little more than what she brought into the marriage.
"She's not about the money," an insider said. "She's not that girl. She loves to work.
"Money is not that important to her. She makes plenty on her own."
Holmes is reportedly insistent on receiving child support from Cruise and it has been speculated that she will try to challenge the prenup.
The 33-year-old has now moved out of the home she shared with Cruise, taking their 6-year-old daughter Suri with her. She is apparently looking to gain full custody of the child.
Photo gallery - Tom Cruise and Katie Holmes in pictures:
Copyright: Rex Features