How is Illinois child support calculated?

Income Shares model combining both parents income.

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Illinois Child Support Calculator

Illinois child support uses Income Shares. Duration age 18 or HS to 19. Shared custody threshold over 146 nights.

Child Support Calculator

Estimate child support payments based on income, custody, and expenses. This tool uses the Income Shares Model common in most states.

Children

Parent 1

Annual Gross Income

Custody Percentage

~146 days/year

Income Share

57.1%

Parent 2

Annual Gross Income

Custody Percentage

~219 days/year

Income Share

42.9%

Healthcare & Childcare Costs

Annual Healthcare Costs

Insurance premiums, copays, uncovered medical

Annual Childcare Costs

Daycare, after-school care, babysitting

Additional Expenses

No additional expenses added. Click "Add Expense" to include education, extracurricular, or other costs.

Estimated Child Support Payment

Parent 1 pays Parent 2

$234

per month

Basic Support

$1,488/mo

1 child

Detailed Breakdown

Parent 1

Income Share:57.1%

Custody:40.0%

Basic Support:$850

Net Obligation:$680

Parent 2

Income Share:42.9%

Custody:60.0%

Basic Support:$638

Net Obligation:$446

Important: This calculator provides estimates using a simplified Income Shares Model for educational purposes only. Actual child support calculations vary significantly by state (Illinois) and individual circumstances. Courts consider many factors including deviations, caps, and state-specific guidelines. Consult with a family law attorney in Illinois for accurate calculations specific to your situation.

Illinois Child Support Guidelines

Illinois child support calculated using Income Shares Model. Both parents income considered to determine fair support amount ensuring child needs met.

How Illinois Calculates Child Support

Income Calculation: Gross income from all sources including wages bonuses self-employment rental income unemployment disability. Excludes means-tested benefits like SSI TANF food stamps child support received.

Base Obligation: Combine incomes look up base amount on state schedule based on combined income and number of children. Amount prorated between parents based on income percentage.

Additional Costs: Add health insurance premiums covering child, work-related childcare costs, extraordinary medical expenses. Prorate by income share.

Custody Adjustment: Shared parenting time may reduce obligation accounting for direct expenses during custody. Threshold varies by state.

Duration of Support

Illinois child support continues until termination conditions met: child reaches age specified in order typically 18 or 19, child graduates high school, child emancipated through marriage military or self-support, child adopted, parent or child dies, court modifies or terminates.

Modification

Can modify with substantial change in circumstances: either parent income changes significantly typically 10-15 percent, change in custody or parenting time, change in health insurance or childcare costs, child needs change, other relevant changes. File motion with court demonstrating change.

Enforcement

Illinois enforces through: automatic income withholding from paycheck, tax refund interception federal and state, license suspension driver professional recreational, credit bureau reporting damaging credit score, contempt of court with jail time possible, property liens and bank levies, passport denial for arrears over 2500 dollars.

Self-Employment Income

Self-employed parent income calculated as gross receipts minus ordinary necessary business expenses. Courts scrutinize deductions prevent income manipulation. Personal expenses claimed as business added back. Depreciation often added back as non-cash expense.

Imputed Income

Court can impute income if parent voluntarily unemployed or underemployed without good cause. Based on work history education training, local job market available positions, physical mental ability to work. Good cause includes caring for very young child, verified disability, approved education increasing earning capacity.

Tax Treatment

Child support NOT tax-deductible for payor and NOT taxable for recipient. Paying support does not automatically grant right to claim child as dependent. Custody order or IRS tiebreaker rules determine dependent exemption.

Cost Information

Free Calculator: Illinois child support calculator instant estimates. Administrative: Through state agency minimal or no cost. With Divorce: Uncontested 1500-3500 dollars. Contested 5000-15000 dollars plus. Modification: Agreed 500-1500. Contested 2000-8000. Filing Fees: Vary by county typically 150-400 dollars.

Frequently Asked Questions

Q: How is Illinois child support calculated? A: Income Shares Model. Combined parental income determines base from schedule. Amount prorated by income percentage. Add health insurance childcare extraordinary costs.
Q: What income counts? A: All gross income wages bonuses commissions self-employment rental income unemployment disability retirement pensions. Excludes SSI TANF food stamps child support received.
Q: How long does child support last? A: Typically until age 18 or high school graduation whichever later. Some states extend to 19 or 21. Ends earlier if child emancipated.
Q: Can I modify child support? A: Yes with substantial change in circumstances. Income change 10-15 percent plus, custody change, childcare or insurance cost change. File motion with court.
Q: What if custodial parent remarries? A: Remarriage does NOT affect child support. New spouse income not considered. Support continues until termination conditions met.
Q: Is child support taxable? A: No. Not tax-deductible for payor not taxable for recipient. Different from spousal support.
Q: What if payor does not pay? A: State enforcement: income withholding tax intercept license suspension credit reporting contempt jail time passport denial liens.
Q: Does shared custody reduce support? A: Often yes if meets state threshold typically 25-40 percent parenting time. Accounts for expenses during custody. Specific calculation varies.
Q: What about self-employment? A: Gross receipts minus ordinary business expenses. Courts scrutinize deductions prevent manipulation. Personal expenses added back.
Q: Can court impute income? A: Yes if voluntarily unemployed or underemployed without good cause. Based on earning capacity work history education job market.

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Illinois Child Support Calculator

Illinois child support uses Income Shares. Duration age 18 or HS to 19. Shared custody threshold over 146 nights.

Child Support Calculator

Estimate child support payments based on income, custody, and expenses. This tool uses the Income Shares Model common in most states.

Children

Parent 1

Annual Gross Income

Custody Percentage

~146 days/year

Income Share

57.1%

Parent 2

Annual Gross Income

Custody Percentage

~219 days/year

Income Share

42.9%

Healthcare & Childcare Costs

Annual Healthcare Costs

Insurance premiums, copays, uncovered medical

Annual Childcare Costs

Daycare, after-school care, babysitting

Additional Expenses

No additional expenses added. Click "Add Expense" to include education, extracurricular, or other costs.

Estimated Child Support Payment

Parent 1 pays Parent 2

$234

per month

Basic Support

$1,488/mo

1 child

Detailed Breakdown

Parent 1

Income Share:57.1%

Custody:40.0%

Basic Support:$850

Net Obligation:$680

Parent 2

Income Share:42.9%

Custody:60.0%

Basic Support:$638

Net Obligation:$446

Illinois Child Support Guidelines

Illinois child support calculated using Income Shares Model. Both parents income considered to determine fair support amount ensuring child needs met.

How Illinois Calculates Child Support

Base Obligation: Combine incomes look up base amount on state schedule based on combined income and number of children. Amount prorated between parents based on income percentage.

Additional Costs: Add health insurance premiums covering child, work-related childcare costs, extraordinary medical expenses. Prorate by income share.

Custody Adjustment: Shared parenting time may reduce obligation accounting for direct expenses during custody. Threshold varies by state.

Duration of Support

Modification

Enforcement

Self-Employment Income

Imputed Income

Tax Treatment

Cost Information

Frequently Asked Questions

Q: How is Illinois child support calculated? A: Income Shares Model. Combined parental income determines base from schedule. Amount prorated by income percentage. Add health insurance childcare extraordinary costs.
Q: What income counts? A: All gross income wages bonuses commissions self-employment rental income unemployment disability retirement pensions. Excludes SSI TANF food stamps child support received.
Q: How long does child support last? A: Typically until age 18 or high school graduation whichever later. Some states extend to 19 or 21. Ends earlier if child emancipated.
Q: Can I modify child support? A: Yes with substantial change in circumstances. Income change 10-15 percent plus, custody change, childcare or insurance cost change. File motion with court.
Q: What if custodial parent remarries? A: Remarriage does NOT affect child support. New spouse income not considered. Support continues until termination conditions met.
Q: Is child support taxable? A: No. Not tax-deductible for payor not taxable for recipient. Different from spousal support.
Q: What if payor does not pay? A: State enforcement: income withholding tax intercept license suspension credit reporting contempt jail time passport denial liens.
Q: Does shared custody reduce support? A: Often yes if meets state threshold typically 25-40 percent parenting time. Accounts for expenses during custody. Specific calculation varies.
Q: What about self-employment? A: Gross receipts minus ordinary business expenses. Courts scrutinize deductions prevent manipulation. Personal expenses added back.
Q: Can court impute income? A: Yes if voluntarily unemployed or underemployed without good cause. Based on earning capacity work history education job market.

Upfront pricing at a fraction of the cost of traditional divorce

Divorce doesn’t have to cost as much as a car.

Traditional Divorce

$25-$30k

Divorce.com

$499

$1,999

Get started

Featured Article
The Ultimate Guide
to Getting Started in Your Divorce
Read more
Featured Article
10 Things to Know Before Starting Your Divorce
Read more
Featured Article
Divorce Process with Divorce.com
Read more

Real Answers. Real Support.

Read the blog

Our Services

Paperwork Only

Basic access to divorce paperwork where you handle the rigorous filing process with the court.

Get started

We File For You

Our most popular package includes a dedicated case manager, automated court filing, spouse signature collection, and personalized documentation.

Get started

Fully Guided

Complete divorce support including mediation sessions, dedicated case management, court filing, and personalized documentation.

Get started

We've helped with

over 1 million divorces

We provide everything you need to get divorced — from conflict resolution to filing support and access to divorce experts — in one comprehensive, convenient online platform.

Get started

The team at divorce.com was responsive and helpful during a difficult process. I would highly recommend the site for uncomplicated, amicable divorces!!
Jen B.
I came across this online. So I checked on it. It was easy and affordable. I wish I would have found this years ago.
Brandy D.
I was able to read it easily. Thanks God for this service. I will recommend it to anyone who asks this is a very easy step to do. I love it please try it you won't be disappointed
Dianna R.
Great customer service. Questions were easy to answer and had descriptions to understand the questions.
Andelain R.

Proudly featured in these publications

Put Your Kids in the Center Not in the Middle - Try Our Co-Parenting App

Put Your Kids in the Center Not in the Middle

Illinois Child Support Calculator

Child Support Calculator

Children

Parent 1

Parent 2

Healthcare & Childcare Costs

Additional Expenses

Estimated Child Support Payment

Detailed Breakdown

Parent 1

Parent 2

Illinois Child Support Guidelines

How Illinois Calculates Child Support

Duration of Support

Modification

Enforcement

Self-Employment Income

Imputed Income

Tax Treatment

Cost Information

Frequently Asked Questions

Other Articles:

Other Articles:

Real Answers. Real Support.

The Ultimate Guide to Getting Started in Your Divorce

10 Things to Know Before Starting Your Divorce

Divorce Process with Divorce.com

Upfront pricing at a fraction of the cost of traditional divorce

Divorce doesn’t have to cost as much as a car.

Traditional Divorce

Divorce.com

Our Services

POPULAR

We've helped with

over 1 million divorces

Jen B.

Brandy D.

Dianna R.

Andelain R.

Illinois Child Support Calculator

Child Support Calculator

Children

Parent 1

Parent 2

Healthcare & Childcare Costs

Additional Expenses

Estimated Child Support Payment

Detailed Breakdown

Parent 1

Parent 2

Illinois Child Support Guidelines

How Illinois Calculates Child Support

Duration of Support

Modification

Enforcement

Self-Employment Income

Imputed Income

Tax Treatment

Cost Information

Frequently Asked Questions

Other Articles:

Upfront pricing at a fraction of the cost of traditional divorce

Divorce doesn’t have to cost as much as a car.

Traditional Divorce

Divorce.com

The Ultimate Guide to Getting Started in Your Divorce

10 Things to Know Before Starting Your Divorce

Divorce Process with Divorce.com

Real Answers. Real Support.

Our Services

Paperwork Only

POPULAR

We File For You

Fully Guided

We've helped with

over 1 million divorces

Jen B.

Brandy D.

Dianna R.

Andelain R.

The Ultimate Guide
to Getting Started in Your Divorce