An order for child support can be changed or modified any time there is a "material change in circumstances" from the time that the existing child support was issued. A material change in circumstances can take many forms. The change can be the result of changes in the parent's financial situation - such as appreciable difference in the amount of income earned, loss of a job, a large inheritance, or a change in the amount of time spent with the child. The material change in circumstance can be the result of a new situation for the child - such as large medical expenses, need for special education, or other unexpected requirements. A child support payment could be modified by stipulation between the parents (as long as guideline support factors have been accounted for) or by a noticed court hearing.