Under the guideline formula, the court considers the amount of time each parent spends with a child. Generally, the laws are written such that the parent who has been granted full child custody or is caring for a child more than another parent is expending more money for the support of that child. Thus, in a situation where each parent earns the exact same income, but one parent has more timeshare with the child, then the parent with less time caring for the child would be paying child support payments even though the parties have the same income.