Also, the unpaid child support payments will not accrue arrears (meaning the unpaid payments will not pile up) while the parent is in jail or prison and 60 days after release. You can request a modification if your income has changed in a lesser amount, but you are not guaranteed a change in the support order. For example, in Maryland, if one parent's income has changed (either gone up or down) by at least 25%, this is usually enough of a change to require changing the support order. One of the ...