New Jersey Child Support Calculator

How is Child Support Calculated in New Jersey?

New Jersey calculates child support by combining your and the other parent's net incomes to determine a total support amount from a state schedule. Governed by the N.J. Court Rules, Appendix IX-A, your share of that total obligation is then determined by your percentage of the combined income.

Understanding NJ's Shared Parenting Time Adjustments

In New Jersey, a specific shared parenting calculation is used when the Parent of Alternate Residence has the child for 104 or more overnights per year (28% of the time). Under the guidelines in N.J. Court Rules, Appendix IX-A, this calculation increases the basic support obligation and then apportions it based on each parent's income and the percentage of time they spend with the child, which typically reduces the final payment.

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✓ Verified for 2026 Guidelines • Reviewed October 2026 by Harmoney

New Jersey Child Support Guidelines at a Glance

Guideline Model Income Shares Model
Governing Legal Authority N.J. Court Rules, Appendix IX-A
Shared Custody Threshold 104 Overnights (28% of the year)
Age Support Ends Age 19 (or 23 if in high school/college)
Modification Standard Substantial Change in Circumstances

Frequently Asked Questions About NJ Child Support


At what age does child support end in NJ?

Child support in New Jersey presumptively ends at age 19, but it can be extended until age 23 if the child is still attending high school, college, or another post-secondary educational program full-time, as outlined in N.J.S.A. 2A:17-56.67.

How is child support calculated if one parent is unemployed in NJ?

If a parent is unemployed or underemployed in New Jersey, the court can impute income to them based on their potential earning capacity, considering their work history, qualifications, and prevailing job opportunities. This ensures the child support calculation is fair and based on what the parent is capable of earning.

How do I modify a child support order in NJ?

To modify a child support order in New Jersey, you must demonstrate a 'permanent, substantial, and unanticipated change in circumstances' since the last order was entered. This standard, established by case law like Lepis v. Lepis, requires more than a temporary fluctuation in income and must be a significant, lasting change.

Does NJ child support cover college expenses?

New Jersey courts can order parents to contribute to a child's college or other post-secondary education expenses, even after the child turns 18. This decision is not automatic and is based on a set of factors established in the court case Newburgh v. Arrigo, which considers the parents' financial resources and the student's aptitude.

How does NJ handle health insurance and childcare costs?

Health insurance premiums and work-related childcare costs in New Jersey are added to the basic child support obligation and are divided between the parents in proportion to their relative incomes. These are considered mandatory 'add-on' expenses under the N.J. Court Rules, Appendix IX-A, ensuring both parents contribute fairly to these necessary costs.