Since 2019, Illinois has utilized an income shares model for calculating child support. The income sharing model considers the combined net income of both of the parents and the number of children in calculating the amount of child support. Each parent is then required to pay a percentage of the total obligation that is proportionate to their percentage of the combined income.
Most of the time, the parent with the majority of parenting time, even if they earn more than the other parent, will receive child support payments. The amount of support, however, changes substantially in a shared parenting scenario where the minority parent has at least 146 days with the children during the year. In this situation, the amount of support substantially decreases as the number of overnights above 146 increases.
How does remarriage affect my child support payment?
Generally, when a party paying support remarries, his or her new spouse’s income will not change the amount of support due to the recipient parent. The same goes for the reverse situation: even if the recipient party remarries someone with a significant income, the obligor’s monthly child support will not decrease. The income of the obligor’s spouse is not factored into child support calculations because the new spouse has no legal obligation to financially support the obligor’s child. However, new spouse income can still be considered in the context of child support (and sometimes maintenance) modification proceedings or in rare instances the initial setting of support with unusual circumstances. Even though a new spouse doesn’t have any legal obligation for the support of his or her stepchildren, when one or both parties have since remarried or is living with someone in a committed long-term relationship, the income of the new spouse or cohabitant can be relevant.
...