When a marriage in New York state ends, a couple’s financial responsibilities to their children do not end with it. What changes is how that obligation is calculated, formalized and enforced. When parents separate or no longer live together, their financial responsibilities to their children continue. In New York, child support laws apply whether the parents were married, divorced, never married, or were previously in a domestic relationship.

Child support laws in New York state establish a structured framework governing the amount of child support owed, what expenses it covers, and how a court order is maintained over time. Understanding how that framework operates, from initial calculation through potential modification, matters for any parent navigating a divorce that involves minor children.

The Child Support Standards Act (CSSA)

The Child Support Standards Act (CSSA), enacted in 1989, is the governing statute for child support in New York. It replaced a system of broad judicial discretion with a uniform formula applicable statewide, producing consistent results and ensuring that children receive a standard of living tied to the combined resources of both parents. The CSSA formula determines the basic child support obligation, or the amount intended to cover a child’s food, clothing, and shelter. Mandatory and discretionary add-on expenses are calculated separately and added to that baseline.

How New York Calculates Basic Child Support

The calculation begins with each parent’s gross income, reduced by allowable deductions such as:

• FICA taxes (Social Security and Medicare taxes);
• New York City or Yonkers income taxes where applicable; and
• any child support or spousal maintenance currently paid pursuant to a prior written court order or agreement.

The adjusted figures are combined to produce the combined parental income, which is then multiplied by a percentage tied to the number of children. Each parent’s share of the resulting obligation is proportional to their respective contribution to that combined figure.

The CSSA percentages (17% to 35%) are fixed by statute:

• income for one child: 17% of combined parental income;
• income for two children: 25%;
• for three children: 29%;
• four children: 31% ; and
• five or more children: no less than 35%.

As of 2026, these percentages apply to combined parental income up to $193,000. For income above that threshold, courts may apply the same percentages, apply a different method, or consider statutory factors. Courts must explain their reasoning when deviating from the standard formula.

What Counts as ‘Income’ Under New York Law

The CSSA defines income broadly. Depending on the circumstances, income may include:

• wages;
• self employment and business incomes;
• salary;
• overtime;
• unemployment benefits;
• workers’ compensation;
• disability payments;
• dividend and interest income;
• Social Security;
• veterans’ benefits;
• pension and retirement income;
• annuities; and
• stipend or fellowship awards.

Public assistance and Supplemental Security Income (SSI) are excluded. Courts may also impute income — assigning a higher income level than reported — if a parent is voluntarily unemployed or underemployed.

Add-On Expenses: What Basic Support Does Not Cover

The basic child support obligation covers a child’s fundamental daily expenses but excludes a significant range of additional costs. New York law provides for mandatory add-ons (expenses that must be included in any support order) and discretionary add-ons at the court’s option. Mandatory add-ons include the child’s health insurance premiums, unreimbursed medical expenses such as co-payments and deductibles, and child care expenses incurred while the custodial parent works or attends school. These amounts are allocated between the parents proportionally based on income.

Educational expenses, extracurricular activities, and religious education may be added to the support order at the court’s discretion. Whether such costs are included depends on the family’s circumstances and resources, as well as the child’s needs.

What Happens When Combined Income Exceeds $193,000?

When the parents’ combined income exceeds $193,000, the CSSA formula does not automatically extend to the full amount. The court must determine whether to apply the guideline percentages to income above the threshold, use a different calculation, or consider relevant factors independently, including the financial resources of both parents, the standard of living the child would have maintained had the family remained intact, and the demonstrated needs of the child. The court is required to state its reasoning. Parents in higher-income households should anticipate individualized judicial analysis rather than a straightforward formula application.

Child Support in 50/50 Custody Arrangements

New York presumes that the custodial parent is already spending a proportionate share of their income on the child. Child support payments from the non-custodial parent are designed to equalize that financial burden. When parents share physical custody equally, the parent with the higher income generally remains obligated to pay support to the other. The court applies the CSSA formula to the combined income for determining each parent’s proportional share, and may offset the respective obligations.

The result is not necessarily zero, it reflects the income disparity between parents and the goal of maintaining the child’s standard of living in both households.

How Long Does Child Support Last in New York?

In New York, the obligation to pay child support continues until the child reaches age 21, beyond the age of majority in most states. Support does not terminate automatically at 18 or upon high school graduation. The obligation ends earlier if the child becomes legally emancipated before age 21, which occurs when a child marries, enters active military service, or becomes self-supporting and establishes an independent household.

A child who leaves the parental home between 17 and 21 and refuses to comply with reasonable parental direction may also be considered emancipated. Where a child has a developmental disability, the obligation to provide financial support and health insurance coverage may extend to age 26, but requires a court order and specific eligibility criteria.

Modifying Child Support

A child support order is not permanently fixed. Either parent may file a petition with the court to modify the order when circumstances change substantially. For orders established on or after October 13, 2010, modification requires showing that at least three years have passed since the order was entered or last modified, or that either parent’s gross income has changed by 15% or more, or that the child’s needs are not being adequately met. Any claimed decrease in income must be involuntary and accompanied by a showing of diligent efforts to secure commensurate employment. Modification takes effect from the date the petition is filed, not the date circumstances changed, so prompt filing is essential.

What Happens If a Parent Does Not Pay?

Failure to comply with a child support order can result in significant legal consequences. Enforcement tools, may include Income execution, seizure of bank accounts, interception of tax refunds, and suspension of driver’s licenses, professional licenses and passports. Where those measures prove insufficient, a violation petition filed in Family Court can result in a money judgment with accruing interest, a lien on property, license suspensions, or incarceration of up to six months for willful non-payment.  When those remedies are insufficient, a violation petition filed in Family Court may result in a money judgment, liens against property, license suspensions, or incarceration of up to six months for willful nonpayment

Why Working With a New York Family Law Attorney Matters

Understanding how child support rules work — and how they apply to your specific circumstances — is key to navigating child support successfully.

New York child support laws operate through a structured formula, but applying that formula requires accurate income characterization, correct identification of deductions and add-on expenses, and substantive argument before the court above the income cap. A New York family law attorney can evaluate how the CSSA applies to a specific financial situation, identifying factors that may support deviation from the guidelines and representing a parent’s interests through the hearing or negotiation process. For matters involving modification proceedings, enforcement disputes, or complex custody arrangements, representation helps ensure the outcome reflects actual circumstances rather than a default calculation.

Tully Rinckey attorneys understand that the issues involved in divorce and child custody matters can be challenging, and they will handle your matter with the attention and tact it deserves. Every divorce is unique. If you have additional questions about your divorce or child custody, our team of attorneys is available to assist you today. Please call 8885294543 to schedule a consultation, or schedule a consultation online.

Nancy Nissen, Esq. is a Partner at Tully Rinckey, PLLC’s office in White Plains, New York, where she primarily focuses her practice on family and matrimonial law, with an additional concentration on labor and employment law. Nancy is a trained mediator approved by the NYS Unified Courts System Office of ADR, mediating disputes in family and matrimonial law. Nancy also has experience in Education Law, assisting prior family law clients in the areas of IEP’s, 504 plans, and dealing with grievances for college students.