O.....it really depends on the laws in your state. I have a friend that is a judge and he told me that he never awards 50/50 in his court because if the parties make it to him and he has to decide they have already shown they don’t have the ability work together because if they did they would have never had to go in front of him in the first place. My state is 50/50 so both parties are responsible for 1/2 of the costs...medical, daycare, extra curricular activities, braces, etc. Child support is separate and based on income.....in my state someone always pays unless incomes are the same. I make 3 times what my x makes so even though I have 50/50 I still pay her support but it is much less than what I would be paying if I did not have 50/50. All assets and debts are split 50/50 as well