New Jersey Child Support Calculator & Guide (2025)

Overview of New Jersey Child Support

New Jersey uses the Income Shares Model under Court Rules Appendix IX. Both parents' net incomes are combined to determine the support obligation, reflecting the principle that children should receive the same proportion of parental income they would have enjoyed if the family had remained intact.

New Jersey is unique in that it uses net income rather than gross income for its calculations, and the state's guidelines are known for being comprehensive in their treatment of shared parenting arrangements.

How Child Support Is Calculated in New Jersey

The New Jersey child support formula under Appendix IX works as follows:

1. Determine each parent's monthly net income: Start with gross income and subtract federal and state taxes, Social Security, Medicare, and other allowable deductions
2. Calculate combined monthly net income for both parents
3. Find the base obligation from the Appendix IX schedule based on combined net income and number of children
4. Allocate each parent's share proportionally based on their percentage of combined net income
5. Add health insurance premiums for the child
6. Add work-related childcare costs
7. Add extraordinary medical expenses shared proportionally between the parents

Key Factors in New Jersey Calculations

Net Income Basis

Unlike many states that use gross income, New Jersey calculates support based on net income. This means all mandatory deductions such as federal and state income taxes, Social Security, and Medicare are subtracted before the child support calculation begins.

Self-Support Reserve

New Jersey maintains a self-support reserve of $1,170 per month (2024). This ensures that the parent obligated to pay support retains enough income to meet their own basic living needs. If the support calculation would leave the obligor below this threshold, the obligation may be reduced.

Shared Parenting Adjustments

New Jersey provides adjustments for shared parenting arrangements. When both parents have significant overnight parenting time with the child, the support calculation may be adjusted to account for the duplicated expenses each parent incurs during their parenting time.

Imputed Income

If a parent is voluntarily underemployed or unemployed, New Jersey courts may impute income to that parent based on their earning capacity, employment history, and job qualifications. This prevents parents from avoiding child support by deliberately reducing their income.

Minimum and Maximum Amounts

Minimum: New Jersey does not have a fixed statutory minimum, but the self-support reserve ensures the obligor retains at least $1,170/month for their own needs.

Maximum: The Appendix IX schedule extends to higher combined income levels, and the court has discretion for high-income cases above the schedule.

Modification and Enforcement

Modification

New Jersey allows modification when:

• There has been a substantial change in circumstances
• A significant change in either parent's income has occurred
• Custody or parenting time arrangements have changed
• The child's needs have materially changed

Enforcement

The New Jersey Department of Human Services - Division of Family Development enforces child support through:

• Income withholding from paychecks
• Tax refund interception
• Driver's license suspension
• Professional license suspension
• Credit bureau reporting
• Contempt of court proceedings
• Liens on property and financial accounts

Get your New Jersey estimate: Use our free New Jersey child support calculator to see what you might owe or receive under New Jersey guidelines.