New York's rule on how child support is calculated turns on a feature the national template does not capture: New York uses the Income shares (CSSA percentage of combined income) and measures income as gross income. New York’s Child Support Standards Act applies fixed percentages to combined parental income up to a statutory cap (periodically adjusted): 17% for one child, 25% for two, 29% for three, 31% for four, and 35% for five or more. Income above the cap is discretionary. Each parent’s pro rata share of combined income determines the noncustodial parent’s obligation; add-ons cover childcare, health insurance, and unreimbursed medical expenses. The controlling authority is N.Y. Dom. Rel. Law § 240(1-b); Fam. Ct. Act § 413. Support generally ends when Support generally continues until 21 unless emancipated earlier; college contribution may be addressed separately. Modification: Substantial change in circumstances, three years since the order, or a 15% change in either party’s income, under DRL § 236-B / FCA standards applicable to the case type.
Key takeaways
- New York follows the Income shares (CSSA percentage of combined income) model for presumptive child support.
- Income is generally measured using gross income, then allocated under N.Y. Dom. Rel. Law § 240(1-b); Fam. Ct. Act § 413.
- Guideline amounts are presumptive, not automatic — courts may deviate when the facts justify it.
- Support generally continues until 21 unless emancipated earlier; college contribution may be addressed separately.
- Either parent can seek modification when substantial change in circumstances, three years since the order, or a 15% change in either party’s income, under drl § 236-b / fca standards applicable to the case type..
- Read the companion guide: New York alimony / maintenance (spousal support).
Worked example under New York law
The illustration below uses only rules already stated for New York. It is a research hypothetical, not a prediction of what a court will do.
Two parents in New York need a presumptive child-support figure and may have facts that justify a departure.
- Measure guideline income as gross income under N.Y. Dom. Rel. Law § 240(1-b); Fam. Ct. Act § 413.
- Apply the Income shares (CSSA percentage of combined income): New York’s Child Support Standards Act applies fixed percentages to combined parental income up to a statutory cap (periodically adjusted): 17% for one child, 25% for two, 29% for three, 31% for four, and 35% for five or more. Income above the cap is discretionary. Each parent’s pro rata share of combined income determines the noncustodial parent’s obligation; add-ons cover childcare, health insurance, and unreimbursed medical expenses.
- Test deviation: Courts may deviate based on statutory factors when the CSSA amount is unjust or inappropriate, including the child’s needs and disparity of incomes.
- If circumstances later change: Substantial change in circumstances, three years since the order, or a 15% change in either party’s income, under DRL § 236-B / FCA standards applicable to the case type.
The enforceable number is the New York guideline result under N.Y. Dom. Rel. Law § 240(1-b); Fam. Ct. Act § 413, plus any deviation findings. Support Collection Units use income execution, tax intercepts, license suspension, and contempt.
Statutory framework and guideline model
New York's child support system is built around N.Y. Dom. Rel. Law § 240(1-b); Fam. Ct. Act § 413. Under the income shares (cssa percentage of combined income), New York’s Child Support Standards Act applies fixed percentages to combined parental income up to a statutory cap (periodically adjusted): 17% for one child, 25% for two, 29% for three, 31% for four, and 35% for five or more. Income above the cap is discretionary. Each parent’s pro rata share of combined income determines the noncustodial parent’s obligation; add-ons cover childcare, health insurance, and unreimbursed medical expenses.
Federal law requires every state to maintain presumptive guidelines and to review them at least every four years (42 U.S.C. § 667). Confirm the latest New York schedule or worksheet before relying on any online calculator.
How child support is calculated in New York
- Identify each parent's guideline income using gross income as defined in N.Y. Dom. Rel. Law § 240(1-b); Fam. Ct. Act § 413 and the accompanying worksheets or administrative rules.
- Apply the income shares (cssa percentage of combined income) — whether that means a combined-income schedule, an obligor percentage table, or a Melson-style self-support reserve plus primary obligation.
- Allocate add-ons such as health insurance premiums, unreimbursed medical expenses, and work-related child care according to New York practice.
- Consider parenting time adjustments where the guidelines or case law authorize a credit or shared-custody formula.
- Test for deviation if a strict guideline result would be unjust or inappropriate on the record.
Online calculators can illustrate ranges, but only the controlling statute, guidelines, and court findings produce an enforceable order.
Deviation from the guidelines
Courts may deviate based on statutory factors when the CSSA amount is unjust or inappropriate, including the child’s needs and disparity of incomes.
When a court departs from the presumptive amount, New York practice generally requires findings that explain why the guideline figure is unjust or inappropriate and what amount better serves the child's needs. Those findings matter on appeal and in later modification proceedings.
Modification of child support
Substantial change in circumstances, three years since the order, or a 15% change in either party’s income, under DRL § 236-B / FCA standards applicable to the case type.
A parent seeking a change typically must show that circumstances after the prior order make the existing award inequitable. Common triggers include job loss, substantial income changes, a new parenting-time schedule, emancipation of a child, or extraordinary medical needs. Retroactivity and temporary relief rules are statute-specific — check N.Y. Dom. Rel. Law § 240(1-b); Fam. Ct. Act § 413 and local family-division procedures.
Enforcement in New York
Support Collection Units use income execution, tax intercepts, license suspension, and contempt.
Interstate cases often implicate UIFSA. Income withholding, contempt, license suspension, and tax-refund intercept remain core tools nationwide, but the New York child support agency and clerk of court procedures control day-to-day collection.
When child support ends
In New York, Support generally continues until 21 unless emancipated earlier; college contribution may be addressed separately. Orders may extend for disability, secondary education, or other statutory grounds where the statute allows. Always read the judgment language — agreed orders sometimes set a different end date or require a notice of emancipation.
Case law: how New York courts apply the guidelines
The opinions below are in the LawDiver corpus. Each block quote is taken from the opinion text so you can jump from this guide into the full decision.
In the Matter of Tompkins County Support Collection Unit, on Behalf of Linda S. Chamberlin v. Boyd M. Chamberlin
…of an objection to a cost of living adjustment (COLA) to a child support order. We conclude that the statute authorizes the Family Court to review and adjust the underlying support order in accordance with the standards set forth in section 413 of the Family Court Act,1 not merely to decide whether or not the COLA amount should be applied. Linda and Boyd Chamberlin were marrie…
In the Matter of Tompkins County Support Collection Unit, on Behalf of Linda S. Chamberlin v. Boyd M. Chamberlin is worth reading on New York child support because the court put the point in its own words: "We conclude that the statute authorizes the Family Court to review and adjust the underlying support order in accordance with the standards set forth in section 413 of the Family Court Act,1 not merely to decide whether or not the COLA amount should be applied." Use that passage as the starting point, then read the facts that precede it.
In the Matter of Dutchess County Department of Social Services, on Behalf of Colleen Day, Appellant, v. Richard Day
…a child placed in residential or foster care. We hold that child support obligations in these circumstances are governed by the guidelines set forth in the Child Support Standards Act (CSSA) (see, Family Ct Act § 413). Petitioner Dutchess County Department of Social Services commenced these proceedings, one as to each parent, seeking reimbursement for funds expended on behalf…
In the Matter of Dutchess County Department of Social Services, on Behalf of Colleen Day, Appellant, v. Richard Day is worth reading on New York child support because the court put the point in its own words: "We hold that child support obligations in these circumstances are governed by the guidelines set forth in the Child Support Standards Act (CSSA) (see, Family Ct Act § 413)." Use that passage as the starting point, then read the facts that precede it.
In the Matter of Steven D. Rose, as Commissioner of the Oswego County Department of Social Services, on Behalf of
…r's findings and determination that the respondent mother's child support obligation for her third, noncustodial child was $0. The Commissioner and intervenor Attorney-General of the State of New York appeal as of right on constitutional grounds from the Appellate Division's order affirming Family Court. They argue that New York's Family Court Act § 413 (1) (g), which conclusiv…
In the Matter of Steven D. Rose, as Commissioner of the Oswego County Department of Social Services, on Behalf of is worth reading on New York child support because the court put the point in its own words: "The Commissioner and intervenor Attorney-General of the State of New York appeal as of right on constitutional grounds from the Appellate Division's order affirming Family Court." Use that passage as the starting point, then read the facts that precede it.
In the Matter of Broome County Support Collection Unit, on Behalf of Amanda J. Bickham v. Jason J. Morais
Stein, J. A 2001 order, which incorporated a child support stipulation between respondent and Amanda J. Bickham, required respondent to pay child support for their son (born in 2000) in the amount of $50 per month. Petitioner, on behalf of Bickham, commenced this proceeding for violation of that order.* After a hearing, the Support Magistrate found respondent to…
On child support, In the Matter of Broome County Support Collection Unit, on Behalf of Amanda J. Bickham v. Jason J. Morais speaks to the New York dispute in this passage: "Stein, J. A 2001 order, which incorporated a child support stipulation between respondent and Amanda J. Bickham, required respondent to pay child support for their son (born in 2000) in the amount of $50 per month." The surrounding opinion shows how the court applied that language to the record.
Matter of Livingston County Support Collection Unit v. Sansocie
Matter of Livingston County Support Collection Unit v. Sansocie, 2022 NY Slip Op 01914 (2022)
…objections in part and vacating the amount of respondent's child support obligation, and as modified the order is affirmed without costs and the matter is remitted to Family Court, Livingston County, for further proceedings in accordance with the following memorandum: In this proceeding pursuant to Family Court Act article 4, petitioner, acting on behalf of the father of the s…
On child support, Matter of Livingston County Support Collection Unit v. Sansocie speaks to the New York dispute in this passage: "objections in part and vacating the amount of respondent's child support obligation, and as modified the order is affirmed without costs and the matter is remitted to Family Court, Livingston County, for further proceedings in accordance with the following memorandum: In this pro" The surrounding opinion shows how the court applied that language to the record.
In the Matter of Ulster County Support Collection Unit, on Behalf of Amy Lynn Hess-Cockburn v. Michael Andrew Oliver
…support order upon consent wherein respondent agreed to pay child support in the amount of $110 per week. Respondent never made a single child support payment and, in June 2014, petitioner commenced this proceeding upon behalf of the children’s mother alleging that respondent had willfully violated the 2009 order of support. At the time the petition was filed, respondent’s arre…
On child support, In the Matter of Ulster County Support Collection Unit, on Behalf of Amy Lynn Hess-Cockburn v. Michael Andrew Oliver speaks to the New York dispute in this passage: "Respondent never made a single child support payment and, in June 2014, petitioner commenced this proceeding upon behalf of the children’s mother alleging that respondent had willfully violated the 2009 order of support." The surrounding opinion shows how the court applied that language to the record.
Practical checklist for New York child support matters
- Gather recent pay stubs, tax returns, and proof of health insurance / child-care costs.
- Complete the current New York worksheet or financial affidavit required by the local court.
- Document parenting-time overnights if a shared-custody adjustment may apply.
- Flag facts that could support deviation (special needs, travel costs, high income, other children).
- Search LawDiver for recent New York appellate decisions before mediation or trial.
Frequently asked questions
How is child support calculated in New York?
New York uses the income shares (cssa percentage of combined income) under N.Y. Dom. Rel. Law § 240(1-b); Fam. Ct. Act § 413. Courts start with gross income, apply the guideline schedule or percentage, allocate add-ons, and may deviate with findings when the presumptive amount is unjust.
What income counts for New York child support?
Guideline income generally tracks gross income as defined by N.Y. Dom. Rel. Law § 240(1-b); Fam. Ct. Act § 413 and the worksheets. Wages, self-employment income, bonuses, and certain benefits are commonly included; exact deductions and exclusions are statute-specific.
Can New York courts order more or less than the guideline amount?
Yes. Guideline support is presumptive. Judges may deviate when the record shows the guideline result is unjust or inappropriate, typically with written findings explaining the departure.
How do I modify a New York child support order?
Substantial change in circumstances, three years since the order, or a 15% change in either party’s income, under DRL § 236-B / FCA standards applicable to the case type. File in the court with continuing jurisdiction (or follow UIFSA for interstate cases) and support the request with current financial evidence.
When does child support end in New York?
Support generally continues until 21 unless emancipated earlier; college contribution may be addressed separately. Confirm any disability, educational, or agreed extensions in your particular order.
Where can I research New York child support case law?
Use LawDiver search scoped to New York, or open the opinions linked in this guide. Companion reading: New York maintenance (spousal support) guide.
Disclaimer
This guide is general legal information about New York child support, not legal advice. Statutes, guidelines, and case law change. Confirm the current text of N.Y. Dom. Rel. Law § 240(1-b); Fam. Ct. Act § 413 and consult a licensed New York family-law attorney about your facts.