End child support payments by seeking a parent's permission to do so or by having a court change the support orders, says The Law Dictionary. Reasons for modified child support orders include a parent's minimal income, job loss or incarceration and changes in the child's living arrangements.
Non-custodial parents who make less than custodial parents or who have minimal income may not be required to pay child support, explains The Law Dictionary. When someone is incarcerated or loses a job, a court may choose to end child support. The death of the custodial parent or a fundamental change in the nature of a child's living arrangements can cause the cancellation of child support. In some states child support is no longer necessary once a child is 18; in other states it is required until a child reaches 21. Other situations that may result in termination of support include a child's emancipation or enlistment in the military and adoption by another adult.
When a parent's circumstances change, a court may order temporary or permanent changes in child support, says Nolo. If either parent becomes disabled or a child's need significantly change, a permanent support modification may be granted. Fundamental changes in total household income of either parent, such as remarrying or changing jobs, are reasons a court may order a permanent change in child support. Changes in the cost of living or child support laws are also factors a court considers.