Quick answer: In New York, child support modification is possible on a substantial change in circumstances, or, unless the parents opted out, when three years have passed or either parent’s gross income changed by 15% or more. A modification cannot reduce arrears accrued before the application. Incarceration does not bar a finding of substantial change.
This New York child support modification calculator applies Family Court Act 451. Enter your current order and the amount the guidelines give today (you can get it from the New York child support calculator), say whether 3 years have passed or income changed by 15%, and it shows whether you have a ground without proving a substantial change, the monthly gap and what it adds up to.
New York child support modification at a glance
| Rule | What New York says |
|---|---|
| Substantial change | The court may modify on a showing of a substantial change in circumstances, including an order that merged an agreement; incarceration is not voluntary unemployment and not a bar (Family Court Act 451(3)(a)) |
| Three years | Unless opted out, three years since the order was entered, last modified or adjusted (451(3)(b)(i)) |
| 15% income change | Unless opted out, a change of 15% or more in either party’s gross income; a reduction counts only if involuntary and with diligent job search (451(3)(b)(ii)) |
| Arrears | A modification cannot reduce or annul child support arrears accrued before the application (451(1)) |
| Cost-of-living review | Every two years the program reviews orders at least two years old when the CPI-U has risen at least 10 percent (NY child support program) |
| How to start | File a petition that alleges facts meeting one or more grounds (451(2)); Form 4-11 is the Family Court form |
How does child support modification work in New York?
- Know the three grounds. See what counts as a substantial change in New York.
- File the petition and watch the timing. See how to modify child support in New York.
- Income problems and incarceration. See lowering child support after job loss or incarceration in New York and, for what stays owed from before you apply, the New York child support arrears calculator.
What does this modification calculator check?
The calculator tells you whether either statutory shortcut applies (3 years, or a 15% income change) and shows the monthly gap against the guideline amount and the accrued difference. It cannot decide whether a reduction in income was involuntary, or whether the court will modify. Arrears from before the application cannot be reduced.
Frequently asked questions
How much does income have to change to modify New York child support?
A change of 15% or more in either party's gross income since the order was entered, last modified or adjusted is a ground, unless the parents opted out; a reduction counts only if it was involuntary and with diligent job search.
How long must I wait to modify New York child support?
You can file at any time on a substantial change; without one you can file when three years have passed since the order was entered, last modified or adjusted.
Does a New York modification erase arrears?
No. A modification cannot reduce or annul child support arrears accrued before the application.
Can a New York jail sentence be a substantial change?
Yes. Incarceration is not voluntary unemployment and is not a bar to finding a substantial change in circumstances.
Does New York adjust child support for the cost of living?
The child support program reviews orders every two years for a cost-of-living increase when the order is at least two years old and the CPI-U has risen at least 10 percent.