In Kim Kardashian's case, she's mentioned that she gets 10%. We're not sure if that number still applies, but it sounds reasonable.
Now that Kylie Jenner is branching out and doing her own thing with her hair extension line, RadarOnline reports that Kris' youngest daughter is not happy with the financial arrangement.
"Kylie has been fighting non-stop with her mother Kris over the money generated from this," a source tells the site, saying that the line is doing very well and "Kylie feels she should have complete access to the money because it is hers and she deserves it."
Apparently, Kris has control over all of the money, which might be a manager thing or it might be a plain old MOM thing, because Kylie hasn't turned 18 yet.
Ironically, sister Kendall Jenner, who IS over 18 (she's actually 19), is reportedly considering dropping Kris from her management team as well. So, who knows? Sometimes business and family are just a really bad combination and what works for Kim might not necessarily work for Kendall and Kylie.
Would you want your mom as your manager?