The combined gross income of both parents is one of the key factors that a judge will take into consideration when determining child support payments. This is because the child support payments are meant to untangle the costs associated with raising the child, which can be quite expensive. With a clear sense of the income of the parents, the child support situation becomes more logical and coherent. Income includes wages, tips, commissions, self-employment revenue, and any other form of payment.The combined gross income of both parents is one of the key factors that a judge will take into consideration when determining child support payments. This is because the child support payments are meant to untangle the costs associated with raising the child, which can be quite expensive. With a clear sense of the income of the parents, the child support situation becomes more logical and coherent. Income includes wages, tips, commissions, self-employment revenue, and any other form of payment.