if i request a half a time custody of my daughtedaughter i have to pay child support

Well, a request, in and of itself, does nothing to affect who pays what.  Presuming what you actualy meant was "If the court orders that we have joint custody, does it affect child support?" the answer is "maybe."  It depends on income. A couple of things you should know: first, the definition of "joint custody" was changed in 2009 -- it now means any time share of 60/40 or closer.  For an explanaiton, and data as to what custody schedules do and do not meet this threshhold, see the materials posted at http://www.willicklawgroup.com/child-custody-and-visitation/. Second, if you do end up with joint custody, who pays what support to whom is determined by offset.  For an explanation, and a posted calculator to make it easier, see the materials posted at http://www.willicklawgroup.com/child-support/.