Child support in Monmouth County is determined just as it is determined in every county in the State of New Jersey and generally across the country by a statute and/or child support guidelines. Child support guidelines are used if the parents ‘net income is less than $3600.00 a week. Income is a very broad term. The determination of their net income is part of the analysis as well as the number of children and the number of overnights each parent has. The amount of child support allocated to a child or children is shared between the parents.