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New Jersey Child Support Calculator

Estimate NJ guideline child support under Appendix IX-F. Uses both parents' net income after NJ state tax, federal tax, and FICA. Shared parenting worksheet activates at 28%+ overnights (102+ per year). Health insurance and childcare adjustments included.

Updated April 2026 Appendix IX-F (NJ Court Rules) Private — runs in your browser
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Non-custodial parent gross
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Custodial parent gross
New Jersey Child Support (Appendix IX-F)
$1,636/mo
Combined Net Income$7,024/mo
Basic Obligation$1,791/mo
NCP Net Share63.6%
NJ uses net income (after NJ state, federal, and FICA taxes). Combined net income determines the basic obligation from Appendix IX-F.
Advanced Calculator

Full NJ net income breakdown with state tax details, shared parenting worksheet visualization at all overnight levels, and 10-year projection.

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NJ Inputs
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NJ Child Support (Appendix IX-F)
$1,636/mo
Combined Net$7,024/mo
Basic Obligation$1,791/mo
NCP Net Share63.6%
Obligor Net Income
Gross: $7,000/mo
Fed tax (~22%): −$1,540
FICA (7.65%): −$536
NJ tax (~6.5%): −$455
Net: $4,470/mo
Obligee Net Income
Gross: $4,000/mo
Fed tax (~22%): −$880
FICA (7.65%): −$306
NJ tax (~6.5%): −$260
Net: $2,554/mo
Professional Simulator

Complete income breakdown for both parents, prior support deductions, all Appendix IX-F adjustments, parenting time financial impact, what-if income scenarios, and lifetime NPV projection.

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Obligor Income — Annual: $84,000
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Obligee Income — Annual: $48,000
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Children & Adjustments
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NJ Professional Child Support Analysis
$1,636/mo
Net Income (Appendix IX-F)
Obligor net: $4,470/mo
Obligee net: $2,554/mo
Combined net: $7,024/mo
Basic obligation: $1,791/mo
Obligor share: 63.6% = $1,140/mo
Adjustments
Health insurance: +$178/mo
Childcare: +$318/mo
Total: $1,636/mo
% of Combined Net23.3%
Annual Obligation$19,633/yr

How New Jersey Child Support Works

New Jersey uses the Income Shares Model codified in the New Jersey Child Support Guidelines, Appendix IX-F of the New Jersey Court Rules. Like Pennsylvania, NJ calculates support based on both parents' net income after taxes, reflecting what parents actually have available to spend on their children.

New Jersey Net Income

NJ net income is gross income minus: federal income tax, FICA taxes (Social Security and Medicare), New Jersey state income tax, mandatory union dues, and other required deductions. New Jersey's progressive state income tax ranges from 1.4% to 10.75%, making it one of the highest state income tax burdens in the US.

Shared Parenting Worksheet (Appendix IX-F)

When the non-custodial parent has 28% or more of parenting time (approximately 102+ overnights per year), New Jersey applies the shared parenting worksheet. This worksheet calculates a theoretical child support obligation for both parents — what each would owe the other — and the net difference becomes the actual payment. This significantly reduces support in shared parenting cases.

Additional Child Support Adjustments

NJ Net Income = Gross − Fed Tax − FICA − NJ State Tax − Mandatory Deductions
Combined Net = Obligor Net + Obligee Net
Basic Obligation = Appendix IX-F Table (Combined Net, # Children)
Obligor Support = Basic Obligation × (Obligor Net ÷ Combined Net) + Adjustments

Worked Example

Obligor earns $7,000/mo gross. Obligee earns $4,000/mo gross. Two children. Standard parenting (100 nights).

Obligor Gross$7,000/mo
NJ taxes (~36.15%)−$2,531
Obligor Net$4,469/mo
Obligee Net$2,554/mo
Combined Net$7,023/mo
Basic Obligation (2 children)$1,791/mo
Obligor Share (63.6%)$1,139/mo
+ Health + Childcare (63.6%)+$496/mo
Total Monthly Support$1,635/mo
Official Sources & Legal References

Frequently Asked Questions

New Jersey Appendix IX-A defines income broadly: wages, salaries, commissions, bonuses, tips, overtime, net self-employment income, rental income, Social Security benefits, disability, unemployment compensation, workers' compensation, pensions, annuities, interest, dividends, and capital gains. Courts can impute income to voluntarily unemployed or underemployed parents based on earning capacity. Income from means-tested public assistance is excluded.
When the non-custodial parent has 28% or more of parenting time (approximately 102 overnights per year), New Jersey uses the shared parenting worksheet from Appendix IX-F. The worksheet calculates what the obligor would pay the obligee AND what the obligee would pay the obligor if roles were reversed. The difference between these two theoretical amounts is the actual child support payment. This approach recognizes that both parents incur direct costs during their parenting time.
New Jersey deducts court-ordered child support that a parent is actually paying for other children before calculating net income. This ensures the calculation reflects income actually available for the children in the current case. Voluntary payments for other children are not automatically deducted — only amounts ordered by a court. This prevents a parent from reducing their obligation simply by voluntarily supporting additional children.
Yes. New Jersey allows modification when there is a substantial change in circumstances — typically defined as a change that results in a 20% or greater difference between the current order and the newly calculated amount. Job loss is one of the most common grounds for modification. However, courts look carefully at whether the job loss was voluntary or involuntary. If voluntary, courts may continue to impute the prior income level. Modification applications filed promptly after the change in circumstances are more likely to be applied retroactively to the filing date.
Under the New Jersey Child Support Act, support automatically terminates when a child turns 19 unless: (1) a court order specifically extends support, (2) the child is in school, or (3) there are physical or mental disabilities requiring continued support. New Jersey is notable for allowing courts to order support through college (age 23 for full-time students) under the Newburgh v. Arrigo doctrine, though college support is discretionary and depends on both parents' financial situations and the child's reasonable college expenses.

When to Consult a New Jersey Family Law Attorney

This calculator produces estimates. Consult a licensed New Jersey attorney if your case involves: combined net income above $187,200/year (above-cap discretion applies), shared parenting near the 28%/102-overnight threshold, the Newburgh v. Arrigo college contribution doctrine, imputed income disputes, or modification requests based on 20%+ income change.

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Not legal or financial advice. This calculator provides estimates based on published guidelines and formulas. Family law varies by jurisdiction and individual circumstances. Always consult a qualified attorney or financial advisor before making decisions. Full disclaimer · Our methodology