Illinois Child Support Calculator - IL Child Support Guidelines & Income Shares Model
Free Illinois child support calculator using IL income shares model. Calculate child support payments based on Illinois child support guidelines and both parents income. Our calculator helps you understand Illinois child support guidelines and estimate support obligations using the income shares model.
Last updated: December 15, 2024
Need a custom legal calculator for your platform? Get a Quote
Monthly net income after taxes and deductions
Monthly net income after taxes and deductions
Number of children subject to support order
Monthly child care costs (daycare, after-school care, etc.)
Monthly health insurance premiums for children
Children from other relationships not subject to this support order
Percentage of parenting time with non-custodial parent
Child Support Calculation
Combined Monthly Net Income
$10,000
Basic Child Support Obligation
$4,530
Custodial Parent Share:
40%
Non-Custodial Parent Share:
60%
Basic Child Support:
$2,446.2
Child Care Contribution:
$480
Health Insurance Contribution:
$180
Total Monthly Child Support
$3,106.2
Illinois Income Shares Model
Illinois Child Support Guidelines:
- • Uses income shares model based on both parents' income
- • Basic obligation varies by combined income and number of children
- • Additional expenses shared proportionally
- • Parenting time adjustments available for significant time
Illinois Child Support Tips:
- • Document all income sources including bonuses and overtime
- • Include all child-related expenses in calculations
- • Consider mediation for parenting time arrangements
- • Review support orders every 3 years or with significant income changes
Important Notice:
This calculator provides estimates based on Illinois child support guidelines. Actual support amounts may vary based on specific circumstances, additional factors, and court discretion. Consult a family law attorney for personalized legal advice.
Illinois Child Support Calculator Features
Calculation method
Income Shares Model
Uses Illinois income shares model for fair support calculations
Adjustment factors
Pro-rated by Time
Adjusts support based on actual parenting time percentages
Household adjustments
Reduces Basic Obligation
Adjusts support when other children live in the household
Insurance costs
Added to Support
Factors in health insurance costs for children
Child care costs
Work-Related Only
Includes only work-related child care expenses
Minimum amounts
$50-$100 Minimum
Ensures minimum support amounts for low-income situations
Quick Example Result
For $4,000 custodial parent income and $6,000 non-custodial parent income with 2 children:
Monthly Child Support
$3,106.2
Basic Obligation
$4,530
How Illinois Child Support Calculation Works
Illinois child support calculations follow the Illinois Income Shares Model, which determines support based on both parents' combined income and each parent's proportional share. The calculation considers parenting time, additional expenses like child care and health insurance, and other children in the household. Our calculator applies Illinois Child Support Guidelines to provide accurate estimates for family court proceedings.
Illinois Income Shares Formula
Basic Obligation = Combined Income × Percentage (1-20%, 2-28%, 3-32%, 4-35%, 5+-40%)Each Parent's Share = (Parent Income ÷ Combined Income) × Basic ObligationSupport = Higher Earner's Share - Lower Earner's ShareIllinois uses the income shares model which considers both parents' incomes proportionally. The percentage varies by number of children, and adjustments are made for parenting time and expenses.
Key Factors in Illinois Calculations
Illinois child support calculations consider multiple factors to ensure fair and adequate support:
- Both parents' gross monthly income from all sources
- Number of children subject to the support order
- Parenting time percentages for each parent
- Work-related child care expenses
- Health insurance costs for the children
- Other children living in either parent's household
- Minimum support amounts for low-income situations
Illinois-Specific Considerations
- Income Shares Model: Illinois uses proportional income sharing rather than fixed percentagesBoth parents' incomes are considered in the calculation
- Parenting Time Adjustments: Support is adjusted based on actual parenting timeMore parenting time reduces support obligations
- Minimum Support: Illinois sets minimum support amounts for low-income parentsTypically $50-$100 per month minimum
- Modification Rules: Support can be modified with significant income changesEither parent can request modification
Need help with other legal calculations? Check out our Colorado child support calculator and court date calculator.
Get Legal Calculator for Your PracticeIllinois Child Support Calculator Examples
Parent Information:
- Custodial Parent Income: $4,000/month
- Non-Custodial Parent Income: $6,000/month
- Combined Income: $10,000/month
- Children: 2
- Parenting Time: Standard (80/20)
Calculation Steps:
- Determine basic obligation: $10,000 × 28% = $2,800
- Calculate parent shares: Custodial (40%), Non-custodial (60%)
- Apply parenting time adjustments
- Add child care and health insurance
- Final support: $1,680/month
Result: Monthly child support = $1,680
Based on Illinois income shares model with standard parenting time arrangement.
Equal Parenting Time Example
Same income, 50/50 parenting time
Monthly support: $1,120 (reduced due to equal time)
Low Income Example
$2,000 and $1,500 monthly income, 1 child
Monthly support: $100 (minimum applies)
Frequently Asked Questions
Found This Calculator Helpful?
Share it with others who need help with Illinois child support calculations
Suggested hashtags: #IllinoisChildSupport #ChildSupportCalculator #ILChildSupport #FamilyLaw #Calculator