Can Child Support Continue Past Age 18 for a Disabled Child in Illinois?

 Posted on April 15, 2026 in Family Law

Most parents know that child support in Illinois ends when a child turns 18, or 19 if the child is still in high school. But for families raising a child with a disability in 2026, that cutoff may not be the end of the story. If your child cannot live on their own due to a physical or mental condition, Illinois law may allow you to seek child support well past age 18. A Naperville family law attorney can help you understand your options.

What Does Illinois Law Say About Child Support for Disabled Adult Children?

Illinois law gives parents a legal path to seek child support beyond age 18 for a child with a disability. Under 750 ILCS 5/513.5 of the Illinois Marriage and Dissolution of Marriage Act, a court can order support for a child who has turned 18 if that child has a physical or mental disability and is not otherwise emancipated. The court can require either parent to pay, for as long as the child's condition requires it.

A petition for support may be filed before or after the child turns 18. However, the disability must have started while the child was still a minor. A condition that develops after adulthood would generally not qualify.

This type of support is not calculated using the standard income shares formula Illinois uses for minor children. Instead, the judge looks at what is fair, given the child's needs and each parent's financial situation.

Which Disabilities Qualify a Child for Extended Child Support in Illinois?

The CDC reports that about 1 in 6 children, aged three to 17, in the United States has a developmental disability, and many of those conditions last well into adulthood. For parents navigating a divorce or separation, that reality raises an important question about financial support. Not every adult child with a disability will qualify under 750 ILCS 5/513.5, but the law covers a wide range of conditions.

Conditions such as autism spectrum disorder, cerebral palsy, intellectual disability, and severe mental illness may all qualify. A court will look at medical records, school records, and other documentation of the child's daily needs to decide whether the standard is met.

How Do Illinois Courts Calculate Child Support for a Disabled Adult Child?

Because these cases fall outside the standard child support guidelines, judges have more flexibility. The court will consider several factors, including:

• The financial resources of both parents

• The standard of living the child would have had if the marriage had not ended

• Any income the child receives, such as Supplemental Security Income (SSI) or Social Security disability benefits

• Any other support being provided to the child

If the child already gets Social Security disability benefits, those payments may lower what the paying parent owes. Courts aim to cover the child's reasonable needs without providing more than necessary.

Payments can go directly to the other parent or to a special needs trust. A trust can protect the child's access to programs like Medicaid and SSI, which have income limits that direct payments could affect.

Can Child Support Payments for a Disabled Adult Child Be Modified in Illinois?

A support order for a disabled adult child is not permanent. If the child's condition improves to the point where they can support themselves, either parent can return to court to end the order. The same applies if the child marries or becomes legally emancipated.

If the child's needs increase, the receiving parent can petition for a higher amount. Medical expenses, changes in housing, or a loss of government benefits can all justify revisiting the order.

Support ends automatically upon the child's death. If the paying parent dies first, the obligation may become a claim against their estate, depending on how the order is written.

Contact a Bloomingdale, IL Family Law Attorney Today

If you have questions about child support for a child with a disability, the attorneys at Mevorah & Giglio Law Offices are here to help. With more than 175 years of combined experience, our team knows how to handle complex family law matters, and we keep our clients informed at every stage. We offer free consultations and will take the time to understand your family's situation. To speak with experienced Naperville child support lawyers, call 630-932-9100 today.