Illinois Child Support Calculator
*
Number of Overnights with Custodial Parent (CP)*
(Parent with majority physical custody: must be between 183 and 365.)
Common Child Custody Arrangements:
  • 50/50: 183 days
  • 60/40: 219 days
  • 70/30: 274 days
  • 80/20: 292 days
  • 4-3 schedule: 208 days
CP
NCP
Gross Monthly Income
Custodial Parent Gross Monthly Income
(Parent with majority physical custody)
$
Non-Custodial Parent Gross Monthly Income*
$
Custodial Parent
Non-Custodial Parent
Custodial Parent
Non-Custodial Parent
Custodial Parent
Non-Custodial Parent
Custodial Parent
Non-Custodial Parent
Custodial Parent
Non-Custodial Parent
Custodial Parent
Non-Custodial Parent
Custodial Parent
Non-Custodial Parent
Custodial Parent
Non-Custodial Parent
Custodial Parent
Non-Custodial Parent
Custodial Parent
Non-Custodial Parent
Custodial Parent
Non-Custodial Parent
Custodial Parent
Non-Custodial Parent
Estimated Child Support Obligation
Custodial Parent's Obligation:
$
Non-Custodial Parent's Obligation:
$