New Jersey uses an income shares model per the Appendix IX-A guidelines. Both parents’ incomes are combined to determine a basic support obligation. Each parent pays a pro rata share. A self-support reserve ensures the obligor retains sufficient income for basic needs.
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New Jersey calculates child support using the Income shares model established under Appendix IX-A to NJ Court Rules. This is a statutory formula that leaves limited room for judicial discretion on the base calculation amount, ensuring consistency and predictability for families across the state.
Basic obligation from Appendix IX-A schedule based on combined net income and number of children. Each parent's share = pro rata based on income percentage.
The calculation begins with determining each parent's net disposable income, which includes virtually all sources of income minus taxes, mandatory payroll deductions, and certain hardship deductions. The court then applies the statutory formula using the time each parent has primary physical responsibility for the children and the applicable income allocation brackets.
Beyond the base formula amount, New Jerseyrequires additional contributions for mandatory add-on expenses. These typically include childcare costs necessary for the custodial parent's employment or education, uninsured healthcare expenses for the children, and in some cases, educational and travel costs. These add-ons are split between parents in proportion to their respective incomes.
Primary statute: Appendix IX-A to NJ Court Rules
Income shares model using published Appendix IX-A guidelines.
Self-support reserve: $1,955/month (2025 figure) — obligor must retain this amount.
Prior obligations reduce available income for new support orders.
Add-ons: health insurance, childcare, and extraordinary expenses split proportionally.
NJ child support guidelines are among the most detailed, using a published dollar-amount schedule.
NJ public pensions (PERS, TPAF, PFRS, SPRS, JRS) require separate DRO through the Division of Pensions.
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Residency Requirement
12 months in New Jersey before filing (N.J.S.A. 2A:34-10)
Mandatory Waiting Period
No mandatory waiting period
No-Fault Ground
Irreconcilable differences for 6+ months
State Income Tax
Progressive 1.4% to 10.75% (7 brackets)
New Jersey uses the Income shares model under Appendix IX-A to NJ Court Rules. New Jersey uses an income shares model per the Appendix IX-A guidelines. Both parents’ incomes are combined to determine a basic support obligation. Each parent pays a pro rata share. A self-support reserve ensures the obligor retains sufficient income for basic needs.
Key factors include both parents' income, the number of children, custodial time share, mandatory add-on expenses (childcare, health insurance), and any applicable deductions. Income shares model using published Appendix IX-A guidelines.
Yes. Either parent can request a modification if there has been a material change in circumstances, such as a significant change in income, custody arrangements, or the needs of the child. The court will recalculate support using the same statutory formula.
Basic obligation from Appendix IX-A schedule based on combined net income and number of children. Each parent's share = pro rata based on income percentage.
Get a personalized child support calculation based on New Jersey's actual statutory formula.
Start My Free New JerseyEstimate →This tool provides educational estimates based on New Jersey family law and does not constitute legal advice. Child support calculations are approximations of the statutory formula and may differ from court-ordered amounts. Consult a licensed New Jersey family law attorney before making decisions. Primary statute: Appendix IX-A to NJ Court Rules.