New York child support calculator

The CSSA starts from each parent’s income — gross income from all sources, reduced by Social Security and Medicare (FICA), any New York City or Yonkers income tax, spousal support actually paid, and support paid for other children. This calculator subtracts the 7.65% FICA automatically; enter each parent’s gross income and adjust for the other deductions if they apply to you.

The two parents’ incomes are added together to get combined parental income, which drives the percentage in the next section.

New York does not use a lookup table. It applies a single percentage of combined income set only by the number of children: 17% for one child, 25% for two, 29% for three, 31% for four, and no less than 35% for five or more. That percentage is applied to combined income up to the statutory cap, which for orders on or after March 1, 2026 is $193,000.

Above $193,000 the law permits but does not require the court to apply the percentage to the excess or to weigh ten statutory factors, so this calculator applies the percentage only up to the cap and flags the excess as discretionary.

The basic obligation is divided between the parents in proportion to their incomes — if the noncustodial parent earns 60% of the combined income, they pay 60% of the basic amount. On top of that, the CSSA prorates mandatory add-ons the same way: reasonable work-related child care, the child’s health-insurance premium, and unreimbursed medical costs (and, in the court’s discretion, educational expenses). This calculator prorates the child-care and health figures you enter.

Two floors protect a low-income payer. If paying the formula amount would drop the noncustodial parent below the self-support reserve ($21,546 in 2026), the order is reduced. Between the reserve and the poverty line ($15,960) the order is $50 a month; at or below the poverty line it can be $25 a month.

Unlike most states, New York does not give the paying parent a routine reduction for parenting time or overnights. The parent with the children the majority of the time is the “custodial” parent and receives support; only genuine 50/50 or split-custody arrangements change who pays. That is why this calculator has no overnights field.

It computes the core CSSA figure — combined income, the percentage, the pro-rata share, the self-support and poverty floors, and prorated child-care/health add-ons. It does not subtract NYC or Yonkers income tax, maintenance paid, or support for other children from income; it does not decide the above-cap amount; and it does not handle 50/50 or split custody, imputed income, or a court’s discretionary variance. For a figure you can file, use the New York child-support worksheet or consult an attorney.