SMITH & SMITH ATTORNEYS AT LAW As of January, 2007, the law in Georgia has changed to an income sharing model. The calculation, initially, is based on the gross incomes of the both parents. The parent, whom the child does not live with for the majority of time pays a pro-rata share of the Basic Child Support Obligation (BCS0) to the other parent. The gross income of a parent may be reduced by several factors, such as; child support orders for other children, child care, health care. Because of the many caveats to the BCSO, an attorney should be consulted before presenting the child support calculations to the court for approval. Modifications of Child Support, Visitation, Custody and Alimony is allowed under Georgia Law based upon changes in circumstances. You should consult with an attorney that specializes in this area to see if you qualify for modification. Our firm has many years of experience in dealing with the issues of child support and modification of child support.