New Jersey child support calculator

How New Jersey calculates child support

• Each parent’s weekly net income is gross taxable income minus mandatory retirement contributions, alimony paid, income tax withholding (federal, state, Social Security and Medicare), mandatory union dues and other child support orders, plus alimony received and non-taxable income.
• The combined net income and the number of children give the basic award from the Appendix IX-F schedule. Net work-related child care and the children’s share of health insurance are added, and each parent pays their income share.
• The non-custodial parent is credited for child care and health insurance they pay directly, and may get a parenting-time adjustment for variable costs: the basic award × their share of overnights × 37%.
• If paying would leave the non-custodial parent with less than $460 a week (150% of the 2026 poverty guideline for one person) and the custodial parent would still have more than that, the order is reduced to protect that reserve.
• With about 28% of overnights or more (two a week) the shared-parenting worksheet may apply instead.

What the calculator asks

• How many children is the support for?
• Who do the children live with most of the time?
• How many overnights a year are the children with you?
• How many overnights a year are the children with the other parent?
• Your gross taxable income per week
• Income tax withholding per week (you)
• Mandatory retirement, mandatory union dues and other child support orders (you)
• Alimony you pay per week
• Alimony you receive per week
• Your non-taxable income per week
• The other parent’s gross taxable income per week
• Income tax withholding per week (the other parent)
• Mandatory retirement, mandatory union dues and other child support orders (the other parent)
• Alimony the other parent pays per week
• Alimony the other parent receives per week
• The other parent’s non-taxable income per week
• Net work-related child care you pay per week
• Net work-related child care the other parent pays per week
• The children’s share of a health insurance premium you pay, per week
• The children’s share of a health insurance premium the other parent pays, per week
• Does either parent claim a deduction for other children they support in another household or family?
• Does a child receive Social Security, veterans or similar benefits because of a parent?
• Is this the first child support order for these children, and is any of them 12 or older?

It never asks for names, Social Security numbers or account numbers, and your answers are not saved.

What the estimate leaves out

• Shared parenting (Appendix IX-D) and split parenting
• The other-dependent deduction and government benefits paid for the child (worksheet lines 2d, 5 and 15)
• Unreimbursed health care over $250 a child a year and court-approved extraordinary expenses (lines 11 and 12)
• The 14.6% adjustment for a first order entered when a child is 12 or older (IX-A ¶17)
• Combined net income above $3,600 a week ($187,200 a year), where the court adds a discretionary amount
• Deviations the court may make

When a situation is outside what the calculator covers, it says so and points you to the official worksheet instead of guessing.

Official sources

• Appendix IX-A, Considerations in the Use of Child Support Guidelines (amendments effective June 1, 2026)
• Appendix IX-B, Use of the Child Support Guidelines — line instructions (effective June 1, 2026)
• Appendix IX-F, Schedule of Child Support Awards (effective September 1, 2025)
• Appendix IX-C, Sole-Parenting Worksheet (CN 10788)
• Order, annual updating amendments to Appendices IX-A, IX-B, IX-E and IX-H (effective June 1, 2026)

New Jersey Sole-Parenting Worksheet, Appendix IX-C (CN 10788) →