Section 510 of the Illinois Marriage and Dissolution of Marriage Act allows a court to modify a child support obligation upon a substantial change in circumstances. Prior to the 2017 amendments to the Act, child support was based solely on the payor’s income. After the amendments, child support is calculated based upon both parties’ incomes.
What happens when a parent with an obligation to pay child support attempts to modify a pre-2017 order based upon the recipient parent’s new job, when the recipient parent was not previously earning income? According to the Illinois Appellate Court, the answer depends not on the existence of their new-found income, but whether that new income was contemplated at the time of entry of the judgment.