Where support gets decided
In New York, child support is decided either in Family Court, where support magistrates hear most petitions, or in Supreme Court as part of a divorce. Parents who never married can file in Family Court, and if paternity has not been legally established, that question usually has to be resolved before support can be ordered. The amount generally starts from a statutory formula tied to both parents' incomes, with room for the court to depart from it in some circumstances. Parents can agree on support themselves, but the agreement is reviewed against the formula and has to explain any departure from it. Support belongs to the child, so a private promise between parents to waive it is not something a court simply accepts.
The financial records that shape the number
The court works from documents, not estimates. Expect to exchange tax returns, pay records, and a sworn financial disclosure, and to explain income that does not show up neatly on a pay stub, such as self-employment earnings, cash work, or bonuses. When a parent's reported income looks lower than their work history or lifestyle suggests, the court can attribute income to that parent, so the other side's records matter as much as yours. Child care and health insurance costs are usually addressed alongside the basic amount, so receipts and plan documents are worth having in hand. Bring any existing order or agreement, along with proof of what has actually been paid.
Why timing matters when circumstances change
A reduction in support generally cannot reach back past the date a request is filed, so a parent who loses income and waits for things to sort themselves out keeps owing the full amount in the meantime. The same logic works in the other direction for a parent who needs an increase. Informal arrangements between parents, however reasonable, do not change what the order says. When we first talk, we look at whether an order exists, whether parentage is settled, and which court has the case. From there we work through a realistic picture of both incomes and whether filing soon makes sense for you.