Will my husband's child support be reduced if the child is now receiving SSI in Pennsylvania?

In Pennsylvania, child support is calculated using the Income Shares Model which determines monthly support by looking at both parent's gross income, the earning capacity of each parent, the assets owned by the parents, needs of the child, previous alimony orders and any other extraordinary expenses. Based on each parent's average gross income for six months, a monthly payment of child support is calculated by the court. While some states do not include SSI when calculating the parent's gross income, Pennsylvania does.