A modification to a child support order is possible if the parent can show a substantial change in income or a change in the child’s expenses. A documented loss of income would alter the calculation of support according to the state’s formula. As long as the income loss would reduce the payment obligation by at least $50 or 15 percent, a parent may pursue modification. Changes in parenting time may also justify modifying a support order if the parent who pays begins to assume more childcare duties and overnight responsibilities. Reduced expenses for a child could serve as a legitimate reason as well. Although child-related expenses tend not to fall, a child who no longer needs daycare services may no longer need the portion of child support that was contributing to that expense.