Calculation is client-side, income figures are never transmitted or stored.
How New York Child Support Is Calculated
- Combine both parents' income to get combined parental income.
- Apply the statutory percentage based on number of children (17% for 1 child, 25% for 2, 29% for 3, 31% for 4, 35% for 5 or more) to combined income up to the cap ($193,000/year, effective 2026-03-01).
- The parent with fewer overnights (even close to 50/50) pays their pro-rata share of that amount — New York does not use a shared-parenting offset formula.
- Health insurance, work/education-related childcare, and unreimbursed medical costs are mandatory add-ons split pro rata by income share, on top of the basic obligation.
- Above the income cap, courts apply 10 statutory factors rather than the automatic percentage.
New York Child Support Worksheet Walkthrough
Example: combined parental income of $6,000/month, 2 children, Parent A earns $4,000/mo (67% share) and Parent B earns $2,000/mo (33% share) and has fewer overnights.
- Combined income: $6,000/month (below the $16,083/month cap).
- 2 children → statutory percentage: 25%.
- $6,000 × 0.25 = $1,500/month basic obligation.
- Parent A's share (67%) of $1,500 = $1,000/month guideline child support paid by Parent A.
How This Calculator Works — Formula & Constants
Source: New York State Child Support Standards Act (CSSA) · Calcul déterministe — no AI, no arbitrary estimate.
Constants used
| Constant | Value | Source |
|---|---|---|
| 1 child | 17% | N.Y. Dom. Rel. Law § 240; Family Court Act § 413 |
| 2 children | 25% | N.Y. Dom. Rel. Law § 240; Family Court Act § 413 |
| 3 children | 29% | N.Y. Dom. Rel. Law § 240; Family Court Act § 413 |
| 4 children | 31% | N.Y. Dom. Rel. Law § 240; Family Court Act § 413 |
| 5+ children | 35% | N.Y. Dom. Rel. Law § 240; Family Court Act § 413 |
| Combined income cap | $16,083/mo | N.Y. Dom. Rel. Law § 240; Family Court Act § 413 |
| Self-support reserve | $1,795/mo | N.Y. Dom. Rel. Law § 240; Family Court Act § 413 |
Formula
base_obligation = min(combined_income, cap) × percentages_of_combined[children]
share_B = parentB_income / combined_income
total_obligation = base_obligation + childcare_cost + health_insurance_cost
obligation_B = total_obligation × share_B
Deterministic calculation based on New York's official guideline schedule table. Verify against New York's official calculator for a court-ready figure.
FAQ
How is child support calculated in New York?
Combine both parents' income to get combined parental income. Apply the statutory percentage based on number of children (17% for 1 child, 25% for 2, 29% for 3, 31% for 4, 35% for 5 or more) to combined income up to the cap ($193,000/year, effective 2026-03-01). The parent with fewer overnights (even close to 50/50) pays their pro-rata share of that amount — New York does not use a shared-parenting offset formula. Health insurance, work/education-related childcare, and unreimbursed medical costs are mandatory add-ons split pro rata by income share, on top of the basic obligation. Above the income cap, courts apply 10 statutory factors rather than the automatic percentage.
Does New York reduce child support for shared/50-50 custody?
See the guidelines section above.
What counts as income under the New York CSSA?
See the guidelines section above.
What happens if combined income is above $193,000/year?
See the guidelines section above.
Methodology & Source
Formula model: income shares. Effective 2026-03-01, guideline version 2026-NY-CSSA-v1, last reviewed 2026-07-11.
Official source: New York State Child Support Standards Act (CSSA) (N.Y. Dom. Rel. Law § 240; Family Court Act § 413).
Above the combined income cap, courts apply 10 statutory factors rather than the automatic percentage. Courts may also deviate below the cap for documented reasons — this calculator shows the presumptive guideline amount only, not a court order.
Guideline figures transcribed from the primary source above and cross-checked against New York's official calculator/worksheet for multiple test scenarios — see our verification methodology.