Child support formula is the way judges determine the amount of child support the non-custodial parent must pay the custodial parent. There are several factors considered, including whether or not the non-custodial parent already pays child support to another custodial parent, how many children are involved in the child support case, the amount of money the non-custodial parent earns at his or her job, and more. In some states, the court will order that the non-custodial parent pay a percentage of his or her monthly wages to the custodial parent in order to help financially support the children. The money is designated for things the children need - such as shelter, clothing, food, supplies, etc. In some cases, a different payment amount is figured for medical care for the children. If the non-custodial parent does not pay child support, there are several consequences that can happen - from the money being taken directly out of the wages of the non-custodial parent to him or her being arrested or losing their driver's licenses. It's a very serious matter that all non-custodial parents should take seriously.