Child Support calculations use several factors, which include the combined income of both parties (minus tax deductions and other exemptions), the number of children the parties have together, childcare and health insurance costs, and the amount of overnights you spend with your child(ren).

The premise is that if you are spending at least 50 percent of the over nights with your child, then you are spending your funds to care, house, clothe, and feed your child.

What if you do not get 50 percent of the overnights?

If you have your child at least 20 percent of the overnights, then you will get a reduction in the amount of child support based on the number of overnights you actually care, house, clothe, and feed your child.  The more overnight a parent has the more they are entitled to (for lack of a better word) discount on the child support amount.  

What if the other parent makes significantly more money?  In this case, support may still be owed if you are sharing 50/50 in your timesharing (visitation/custody).  However, in any event 50/50 timesharing will reduce the child support obligation significantly.