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How to Get Child Support in Illinois: Starting a Case

If you are a parent who has the majority of parenting time in your child custody case or care for your child the majority of the time, child support payments are an important aspect of a child custody or family law case.

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Starting a Child Support Case in Illinois

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The law in context

Court decisions worth understanding.

Read the issue, the decision and its limits. These selected opinions are background for a focused discussion of your own records and the applicable law.

In re Marriage of McGrath

2012 IL 112792 | Supreme Court of Illinois | 2012

McGrath held that withdrawing money already owned in an ordinary savings account did not make that money income for the child-support calculation before the court. The court also explained that substantial assets could still matter when deciding whether guideline support was inappropriate. The case did not eliminate the parent's support obligation.

Read in context. The decision applied the former percentage-based guidelines. Illinois adopted income shares in 2017, and current calculations require the applicable statute and HFS materials. The opinion expressly left the IRA-distribution issue unresolved. It is not a rule excluding every asset-related receipt, and it does not authorize a parent to reduce an existing payment without the required process.

Read the official opinion (Paragraphs 13-18 and paragraph 12 footnote 2)

What this decision means for your next step

Selected published decisions. Explore all case explanations or read the 2026 law updates.

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Aaron Korson
Mar 13, 2025
7 min read

Updated: Sep 4

How do parents seek child support payments in Illinois?

If you are a parent who has the majority of parenting time in your child custody case or care for your child the majority of the time, child support payments are an important aspect of a child custody or family law case.

Hiring a family lawyer for child support payments is always advised. There are complex aspects of child support that parents often don’t understand without an attorney.

Navigating the complexities of child support in Illinois can be a daunting task for many parents. However, understanding the state's child support laws is crucial for ensuring that children receive the financial support they need.

Illinois has implemented significant changes to its child support system, including the adoption of the income shares model in 2017. This approach calculates child support based on both parents' net incomes and aims to provide the child with a similar standard of living as if the parents were still together. The state's focus on shared financial responsibility ensures that both parents contribute fairly to their children's well-being, regardless of their gender or custodial status2.

Illinois changed its child-support pass-through rules effective January 1, 2023. Beginning in July 2024, the state issued previously retained child support collected from January 2023 onward to eligible current and former Temporary Assistance for Needy Families (TANF) families. HFS explains that families receive child support collected while TANF benefits are received and after those benefits end. Regular pass-through payments continue through the LINK card; additional collected support is sent by check the following month. No pass-through is paid for a month without a child-support collection. Medical support and support for children in foster care may still be owed to the state.

The purpose of this blog post is to provide a comprehensive guide to Illinois child support laws, focusing on the income shares model, recent policy updates, and the importance of understanding these policies. By exploring the key aspects of child support in Illinois, parents can better navigate the legal system and ensure that their children receive the financial support they need. This guide will cover topics such as eligibility for child support, the application process, enforcement mechanisms, and how to modify existing orders.

Additionally, it will highlight recent changes in Illinois child support policies and their implications for families. By the end of this guide, readers should have a clear understanding of how child support works in Illinois and how to manage their child support obligations effectively.

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What affects eligibility for child support in Illinois?

In Illinois, child support is designed to ensure that children receive the financial resources necessary for their well-being, regardless of the parents' marital or custody status. The state’s laws establish clear eligibility criteria for who can request child support and under what circumstances.

Who Can Apply for Child Support?

Custodial Parent: The parent who has primary physical custody of the child is typically eligible to receive child support from the non-custodial parent. This is because the custodial parent is presumed to be providing for the child's daily needs through their own resources.

Legal Guardian or Caretaker: In cases where a child is under the care of a legal guardian or another caretaker, that individual may also be eligible to apply for child support on behalf of the child.

Fathers with Custody: Illinois law does not discriminate based on gender. Fathers who have primary custody of their children are equally eligible to receive child support from the other parent6.

State Agencies: In some cases, state agencies may act on behalf of a child to establish and enforce child support when public assistance is involved1.

Age Limitations for Child Support

Under Illinois law, child support is generally required until the child turns 18. However, if the child is still attending high school at age 18, support continues until they graduate or turn 19, whichever comes first4. In certain situations, such as when a child has special needs or disabilities, support may extend beyond these age limits.

Key Factors That Impact Eligibility

Paternity: If the parents are unmarried, paternity must be established before a child support order can be issued. This can be done voluntarily through an acknowledgment form or through court proceedings if contested.

Custody Arrangements: The amount of parenting time each parent has can influence eligibility and the amount of child support owed. Typically, the parent with less parenting time pays support to the one with primary custody7.

Financial Resources: Both parents’ financial situations are considered when determining eligibility and calculating child support obligations. The income shares model ensures that both parents contribute proportionally based on their net incomes8.

Best Interests of the Child: Illinois courts prioritize the best interests of the child in all decisions related to custody and support. This includes ensuring that adequate financial resources are available to meet the child's needs23.

Why Understanding Eligibility Matters

Understanding eligibility for child support in Illinois is essential for ensuring that children receive adequate financial care. Whether you are a custodial parent seeking assistance or a non-custodial parent navigating your obligations, knowing your rights and responsibilities under Illinois law can make the process smoother and more effective.

Should I Hire a Child Support Lawyer?

Hiring a child support attorney who practices primarily in family law regularly can provide invaluable assistance in securing child support. In most cases in Illinois, child support accompanies issues involving child custody. Parenting time, health insurance, and child care expenses are combined into the same case.

At Chicago Family Attorneys, our family lawyers are well versed in all areas of family law including child support, child custody, divorce, and other issues.

Here’s how an attorney can help you gain child support in Illinois:

Roles of a Child Support Attorney in Illinois

Legal Guidance and Representation: A child support attorney will explain the legal process, Illinois laws, and what to expect at each stage. They represent clients in court hearings and mediations, working to protect their rights and advocating for their interests.

Calculation of Child Support: Attorneys are skilled in accurately calculating child support amounts based on factors such as income, custody arrangements, and the child's needs. They help identify the relevant financial information and apply the support rules to the circumstances of the case.

Negotiation and Mediation: In many cases, child support matters can be resolved through negotiation rather than litigation. A skilled attorney can represent you in these negotiations, aiming to secure a fair settlement that meets your financial needs and provides for your child's welfare.

Enforcement of Orders: If the other parent fails to comply with a child support order, an attorney can assist in enforcing the order. They can seek court enforcement and payment of amounts owed to support your child's financial needs.

Benefits of Hiring a Child Support Attorney in Illinois

There are numerous benefits to hiring. a child support attorney skilled in family law, child custody, and child support.

Advanced Legal Knowledge: Attorneys have in-depth knowledge of Illinois child support laws and guidelines. They help navigate these complexities, ensuring you understand your rights and obligations.

Time and Effort Savings: Handling child support cases can be time-consuming, especially if they involve court proceedings. An attorney saves you time and effort by managing the legal process on your behalf.

Emotional Support: Child support proceedings can be emotionally challenging. Attorneys provide guidance and support, helping you navigate these difficulties while keeping your child's best interests at the center.

Improved Outcomes: In cases where disputes arise, having a lawyer can significantly improve the outcome. They present compelling arguments and evidence to support your case, increasing the likelihood of a favorable ruling.

Steps to Gain Child Support in Illinois

To gain child support in Illinois, it is advised that potential clients take several steps to ensure they are prepared to move forward with legal representation.

Initial Consultation: Schedule a consultation with a family law attorney to discuss your case. This is an opportunity to understand their approach and assess whether they are a good fit for you.

Gather Required Documents: Your attorney will need financial affidavits, proof of income, birth certificates for the children, and any existing court orders related to custody or support.

File a Petition: Your attorney will help you file a petition for child support at the courthouse. This initiates the legal process and sets the stage for negotiations or court hearings.

Negotiate or Litigate: Depending on the circumstances, your attorney may negotiate with the other parent's attorney or represent you in court to establish a child support order.

Enforce the Order: If necessary, your attorney can assist in enforcing the child support order, seeking payment of amounts due and compliance with future payment obligations.

By taking the time to follow each of these steps, you are taking steps to understand your options and pursue an appropriate child support order.

How to Find and Hire a Child Support Lawyer in Illinois

Chicago Family Attorneys assists with child custody and child support matters in Chicago, Illinois. Our attorneys help clients understand their options, prepare their cases and pursue an appropriate resolution within the agreed scope of representation.

Our firm suggests that you take the time to do the following when looking for an attorney:

Research Local Attorneys: Look for attorneys in your area who handle family law and child support. Check their experience and reviews to ensure they are well-suited to handle your case.

Schedule a Free Consultation: Many attorneys offer initial consultations. Use this opportunity to discuss your case, understand their approach, and assess whether they are a good fit for you. Chicago Family Attorneys offers free consultations to those seeking legal representation for child custody and child support.

Consider Costs: While hiring an attorney may seem like an additional expense, their knowledge can help you work toward a favorable resolution. Discuss fees and payment structures during your consultation to ensure they align with your budget.

By hiring a child support attorney from Chicago Family Attorneys, you can have your child support case handled professionally and effectively as you seek the financial support your child needs. This approach offers more control over the process compared to relying on state services, allowing for personalized representation tailored to your specific situation.

How Much Does A Child Support Lawyer Cost?

Chicago Family Attorneys’ usual representation plan starts with $1,500 to $2,500, followed by $500 to $650 monthly beginning 30 days after the initial payment while representation remains active. The agreed scope covers drafting, hearings, motions and calls; expert fees and filing costs are separate and are not advanced by the firm. Court-order enforcement matters have a separately quoted upfront fee plus $350 per hour. The written agreement confirms the applicable scope and fees.

Our usual representation fee is $1,500 to $2,500 initially, followed by $500 to $650 monthly beginning 30 days after the initial payment while representation remains active. Covered work includes drafting, hearings, motions and phone calls within the agreed scope. Experts and filing costs are separate and are paid by the client; the firm does not advance them. Court-order enforcement is separately priced with an individually quoted upfront amount plus $350 per hour.

If you or a loved one are considering hiring a child support attorney, call Chicago Family Attorneys at 312-965-5618 for a free consultation today.

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Starting a child-support matter

Frequently asked questions

Clear answers to help you understand the issue and prepare your next step.

What should I bring when seeking an initial child-support order?

Gather available parentage information, income records, the child's care schedule and relevant expenses. Identify any existing court or administrative proceeding. These details help distinguish the need for an initial order from a request to change or enforce one.

Why should I disclose an existing support or parenting case?

An existing case may contain orders and financial information that affect the next step. Provide the case number and complete orders so they can be reviewed together. Starting from an incomplete history can lead to confusion about what relief is actually needed.

What should I discuss before hiring a child-support attorney?

Use the consultation to discuss the case, the attorney's approach and costs.

  1. Ask about the attorney's experience with child-support matters and approach to your case.
  2. Discuss fees and payment structures during the consultation so you can compare them with your budget.
  3. Use the discussion to assess whether the attorney is a good fit for your needs.
Original article: Aaron Korson. Originally published 2025-03-13.