Under the new Illinois statute, child support is calculated by determining the gross income of each parent.Then, with appropriate calculations, the incomes of each parent are then tax affected to determine the individual and total net income of the family. These calculations are usually performed by implementing software programs such as “Family Law Software,” used  by many judges on their desktop computers. Once that total number is determined, there will be a published chart that will allow the parties and their attorneys to cross reference the amount of total child support that is found to be applicable to a given family at that income level, and for a given number of children. That total amount is then allocated depending on the percentage of income that each parent contributes to the total.