A support order can rise or fall based on money a court says a parent could be earning, not just what appears on current pay stubs. That can change monthly child support, shift responsibility for health insurance or child-care costs, and affect whether a judge sees a parent as underemployed on purpose or simply out of work.

Technically, imputed income for child support is income assigned by a court to a parent who is unemployed, working below earning capacity, hiding earnings, or reporting income that does not fairly reflect available resources. Instead of using only actual wages, the court estimates earning ability from work history, skills, education, job opportunities, past pay, assets, and the surrounding labor market. The idea is to calculate support from realistic earning potential when actual income is unreliable or voluntarily reduced.

In Illinois, this issue is addressed in the Illinois Marriage and Dissolution of Marriage Act, 750 ILCS 5/505(a)(3.2), which allows courts to consider potential income when a parent is voluntarily unemployed or underemployed. Judges may look at whether the parent's employment choice was made in good faith, including health limits, caregiving duties, layoffs, or local work conditions. A truck driver sidelined after winter pileups on I-90, for example, may be viewed differently from someone who quits steady work without a solid reason.

For a case outcome, the evidence matters: tax returns, payroll records, job applications, medical records, and vocational evaluations can all influence whether income is actually earned or legally imputed.