One of the most important issues following a family breakdown is to ensure that the children of the marriage are adequately cared for and receive enough on-going financial support. As parents you are legally responsible for your children until they turn 18. Child support is generally paid by the non-custodial parent and can either be an amount that is mutually agreed upon by the parents, or it can be referred to the Child Support Agency for calculation and collection. The Child Support Agency uses a formula under the Child Support Assessment Act to calculate the amount payable. You can visit the CSA website for more information and obtain an estimate of how much would be payable in your circumstances.