What Child Support Amounts Look Like in New Jersey

New Jersey uses a formula, not a fixed amount, so what you owe or receive depends on both parents' income

New Jersey does not have a single child support number. Instead, the state uses a Child Support Guidelines formula that calculates a monthly amount based on how much each parent earns, how many children need support, and how much time each parent spends with the children. Two families with the same number of children can have very different support orders because their incomes are different.

The formula starts with the combined parental income of both parents. New Jersey then applies a percentage to that income — the percentage changes depending on whether you have one child, two children, three children, or more. After that percentage is calculated, the amount is divided between the parents based on what portion of the combined income each parent earns.

If one parent has the children most of the time, that parent typically receives support from the other parent. If the parents split time roughly equally, the calculation still happens, but the parent who earns more may owe the parent who earns less.

Key Takeaways

• New Jersey calculates child support using a percentage of combined parental income, so the amount varies based on how much each parent earns.
• The percentage applied to income changes based on the number of children: one child is a different percentage than two children or three children.
• The calculated amount is split between parents based on their individual income shares, so the higher earner typically pays more.
• Child support orders can be modified if either parent's income changes significantly or if custody arrangements change.
• The formula applies to income up to a certain threshold; income above that threshold is handled differently and requires a judge's decision.

How the income threshold works

New Jersey's formula applies to combined parental income up to a cap. That cap changes each year. When combined income exceeds the cap, the judge has discretion to order support based on the factors in the case — there is no automatic percentage applied to income above the threshold.

This means that if both parents together earn $200,000 per year, the formula calculates support on income up to the cap, and then the judge decides what happens with the income above it. The judge may order additional support, or may not, depending on the children's needs and the parents' circumstances.

The income cap is adjusted annually, so you should check the current year's guidelines or ask the court what the current threshold is. The New Jersey Courts website publishes updated guidelines each year.

What counts as income for child support

Income for child support purposes includes more than just a paycheck. It includes wages, salary, bonuses, commissions, self-employment income, rental income, and income from investments. It also includes certain benefits like unemployment insurance and disability payments.

Income does not include means-tested benefits like Supplemental Security Income (SSI) or Temporary information for Needy Families (TANF). It also does not include child support or alimony that a parent is already paying to someone else — that amount is subtracted from income before the formula is applied.

If a parent is self-employed or has irregular income, the court may average income over time or may use tax returns to determine what income should be counted. A parent cannot straightforward claim zero income to avoid child support.

The percentages applied to combined income

New Jersey applies these percentages to combined parental income:

Number of Children	Percentage of Combined Income
One child	17%
Two children	25%
Three children	29%
Four children	31%
Five or more children	35%

Once the percentage is applied to combined income, that total amount is divided between the parents based on each parent's share of the combined income. For example, if combined income is $100,000 and there are two children, 25% of $100,000 is $25,000 per year, or about $2,083 per month. If one parent earns $60,000 and the other earns $40,000, the parent earning $60,000 pays 60% of that $2,083, which is about $1,250 per month.

How custody time affects the calculation

The amount of time each parent spends with the children can change the support calculation. If one parent has the children 90% of the time and the other parent has them 10%, the calculation is different than if the parents split time 50-50.

New Jersey uses an overnights calculation to determine each parent's custody share. The parent with fewer overnights typically pays support to the parent with more overnights. If overnights are split roughly equally, the parent with higher income may still owe support to the parent with lower income, but the amount is usually lower than it would be if one parent had primary custody.

If custody changes — for example, if a child moves in with the other parent — the child support order can be modified to reflect the new arrangement.

Additional costs beyond the base amount

The formula calculates a base child support amount, but New Jersey also requires parents to share certain costs beyond that base amount. These include health insurance premiums, unreimbursed medical and dental expenses, and childcare costs related to work or school.

These additional costs are typically split between parents in proportion to their income. For example, if one parent earns 60% of the combined income, that parent pays 60% of the childcare costs, and the other parent pays 40%.

The parent receiving child support should keep receipts and bills for these expenses and provide them to the other parent or to the court if there is a dispute about who owes what.

When a judge can order a different amount

The guidelines formula is the starting point, but a judge can order a different amount if the judge finds that explore the formula would be unjust or inappropriate given the circumstances. This might happen if one parent has very high income, if a parent has other children from another relationship, if a parent is incarcerated, or if there are other factors the judge considers relevant.

A judge can also order a different amount if both parents agree to it in writing. Some parents negotiate a support amount that differs from what the formula would produce, and if both sign an agreement, the court can approve it.

If you believe the formula amount is unfair in your situation, you can ask the judge to consider deviation factors. You will need to explain why the formula amount does not fit your circumstances.

Frequently Asked Questions

Does New Jersey child support go up automatically if my income increases?

No. The support order stays the same until one parent files a motion to modify it. If your income has increased significantly — usually by 10% or more — the other parent can ask the court to recalculate support based on your new income. You can also ask for a modification if your income has decreased.

What if one parent is not working?

The court may impute income to a parent who is not working, meaning the judge assigns an income amount based on what that parent could earn. The judge looks at the parent's age, education, work history, and job market. A parent cannot avoid child support by straightforward quitting a job.

Does child support stop when a child turns 18?

Child support typically ends when a child turns 19 or graduates from high school, whichever is later. If a child is still in high school after turning 18, support continues until graduation or age 19. Support also ends if a child marries, joins the military, or becomes self-supporting before that age.

Can I get a modification if my ex's income changed?

Yes. If your ex's income has changed substantially, either parent can ask the court to recalculate support. You will need to show proof of the income change, such as recent pay stubs or tax returns. The court will not modify an order based on a temporary or seasonal income change.

What if we have a custody arrangement that is not 50-50 and not one parent having all the time?

The court calculates overnights for whatever custody arrangement actually exists. If one parent has the children 60% of the time and the other has them 40%, the formula adjusts accordingly. You do not have to have exactly 50-50 or 90-10 for the calculation to work.