A New York prenuptial agreement is only as useful as the clauses that survive challenge. DRL § 236(B)(3) enforces nuptial agreements executed with the formalities of a recorded deed, and the Court of Appeals has reiterated that New York policy favors their enforcement. The clauses that fail do so for predictable reasons. This article covers the terms that hold up, the terms that do not, and the drafting posture that keeps a prenup from unraveling at the moment it is needed.

The Statutory Framework: DRL § 236(B)(3) and GOL § 3-303

DRL § 236(B)(3) requires that a nuptial agreement be in writing, subscribed by the parties, and acknowledged or proved in the manner required to entitle a deed to be recorded. The acknowledgment requirement is strict. An unacknowledged agreement is unenforceable regardless of its substantive content. General Obligations Law § 3-303 addresses the capacity of parties and the public policy limits on what the agreement can waive.

Substantive challenges proceed under traditional contract defenses applied to the nuptial context: fraud, duress, overreaching, and unconscionability measured at the time of execution. New York does not permit challenges based on substantive unfairness alone; the agreement must have been procured through conduct that would void an ordinary contract. See Matter of Greiff, 92 N.Y.2d 341 (1998). Attacks that gain traction almost always target formation: timing, disclosure, and representation.

Clauses That Hold Up

The clauses that regularly survive challenge in New York share several features. They are specific rather than global. They are tied to documented assets and reasonable financial assumptions at the time of execution. They do not purport to resolve questions the statute reserves for the court. And they are structured so that enforcement does not require revisiting substantive fairness.

Separate Property Preservation

DRL § 236(B)(1)(d) excludes from marital property, among other categories, property acquired before marriage and property acquired by gift or inheritance during the marriage. A prenup can confirm this classification and extend it to specifically identified assets: a pre-marital investment account by institution and account number, a pre-marital business interest by entity name, a pre-marital residence by address, inherited property by source. The clause preserves the asset's separate character even where commingling or active appreciation might otherwise raise an equitable-distribution question under DRL § 236(B)(1)(d)(3).

The accompanying schedule is the operative evidence. The prenup should attach a disclosure schedule listing each party's pre-marital assets, income, and liabilities with sufficient detail that each party knew what they were waiving rights against. A separate property clause unaccompanied by meaningful disclosure is the leading theory on which prenups are set aside.

Spousal Support Waiver or Modification

DRL § 236(B)(3) permits parties to waive or modify spousal maintenance by agreement. The waiver is enforced where it is not unconscionable at the time of entry of final judgment of divorce. The practical drafting posture is a defined maintenance amount or formula rather than a bare waiver, with a floor sufficient to avoid an unconscionability finding where the non-moneyed spouse's circumstances have deteriorated materially between execution and divorce.

A floor is not a surrender; it is a drafting choice that insulates the primary allocation from attack. A waiver with a floor at the amount of a reasonable guideline temporary maintenance obligation under DRL § 236(B)(5-a) is substantially more defensible than a bare waiver with no fallback.

Business and Equity Interests

A pre-marital business is separate property under DRL § 236(B)(1)(d)(1). Appreciation of a pre-marital business during the marriage is partially marital where the appreciation is due to the active efforts of either spouse under DRL § 236(B)(1)(d)(3). A prenup can confirm the pre-marital classification of the business itself and address the appreciation question through one of several structures: a defined buyout formula triggered by divorce, an agreement that appreciation is treated as separate regardless of active-vs-passive analysis, or a cap on the marital portion of appreciation.

The appreciation treatment is a public-policy-sensitive area. A clause that purports to extinguish all claim to appreciation of a pre-marital business operated as the primary career of one spouse during a long marriage carries unconscionability risk at the time of divorce. A clause that caps or formulates the marital share carries far less. For spouses who hold executive equity (RSUs, options, carried interest), the prenup should specifically address the DeJesus classification analysis and set the operative formulas in advance.

Trust Beneficial Interests

Beneficial interests in third-party trusts (dynasty trusts, family trusts, GST trusts) are typically outside the marital estate as inheritance under DRL § 236(B)(1)(d)(1). The prenup can confirm this and extend it to specific future distributions. Where the beneficiary spouse has a general power of appointment or is the sole beneficiary of a revocable trust funded by that spouse, the analysis is different and the clause requires care; the trust corpus in those cases may be reachable in equitable distribution despite nominal titling.

For HNW families where the money comes from trusts, the prenup should coordinate with the trust instruments. A trust protector who can decant assets, a trustee who can accumulate rather than distribute, and a beneficiary's power of appointment all affect what is actually reachable in a divorce. The prenup is one piece of a coordinated structure, not a standalone solution.

Life Insurance and Death Benefits

DRL § 236(B)(8) authorizes the court to order a party to maintain life insurance as security for maintenance or child support obligations. A prenup can address life insurance obligations prospectively: amounts, beneficiaries, duration, and the party responsible for premiums. Death-benefit allocations under retirement plans (ERISA preempts conflicting state law for qualified plans) and nonqualified deferred compensation plans should also be addressed in the agreement.

Full Disclosure: The Non-Negotiable

Nearly every successful challenge to a New York prenup targets disclosure. GOL § 3-303 and the Court of Appeals in Matter of Greiff require that each party had a fair and reasonable understanding of what they were waiving. The disclosure schedule attached to the prenup is the record of that understanding. A disclosure schedule that materially understates one party's assets or income invites challenge regardless of the other party's actual knowledge.

Best practice is to attach a disclosure schedule listing each party's assets, income, liabilities, and material contingent interests (vested stock options, trust beneficial interests, pending inheritances where the testator has died or lacks capacity). The schedule should be dated, signed, and attached by reference in the agreement itself. Disclosure through separate counsel's letter correspondence is less reliable; the agreement should carry the operative disclosure on its face.

Clauses That Don't Hold Up

Several categories of clauses are unenforceable in New York as a matter of public policy regardless of how they are drafted.

Child support waivers. Child support is set under DRL § 240 and the Child Support Standards Act. The parties cannot waive by contract an obligation that is for the benefit of the child. Clauses purporting to waive, cap, or formulate child support in a prenup are unenforceable, though they may inform the court's analysis in some narrow circumstances.

Custody provisions. Custody is a best-interests determination under DRL § 240 made at the time the dispute arises. Prospective custody agreements executed before the parties have a child are unenforceable. Clauses stipulating primary custodial parent or residence are routinely struck.

Religious-upbringing clauses binding the court. Parties can agree between themselves on the religious upbringing of future children, but the court will not enforce such clauses against the best interests of the child at the time of a custody dispute.

Lifestyle clauses. Clauses requiring specific marital conduct (frequency of intimacy, weight maintenance, in-law visits) are unenforceable and signal poor drafting that invites a court to view the agreement as a whole with skepticism.

Clauses that fail unconscionability review at divorce. DRL § 236(B)(3) permits attack on a maintenance waiver or allocation that is unconscionable at the time final judgment is entered. A bare waiver with no floor, executed when the non-moneyed spouse's circumstances were different, is the recurring example.

Signing Logistics

How the prenup is executed is as important as what it says. The best practice posture includes each of the following elements.

Independent counsel for each party. The non-moneyed spouse should be represented by independent counsel chosen by that spouse, not referred by the moneyed spouse's attorney. The representation should include a documented review period, not a signing session on the day of execution.

Adequate time. New York does not fix a minimum interval between presentation and execution of a prenup, but duress challenges hinge on timing. A prenup presented ten days before the wedding and signed under time pressure draws more scrutiny than one negotiated and executed three months before the wedding.

Formal acknowledgment. DRL § 236(B)(3) requires an acknowledgment in the manner required to entitle a deed to be recorded. The acknowledgment language and the notary's execution must be correct. An unacknowledged or defectively acknowledged agreement is unenforceable regardless of the parties' actual intent.

Written disclosure attached. The disclosure schedule should be attached to the agreement, signed and dated, and incorporated by reference in the agreement. Later discovery that one party's disclosure materially understated assets is the leading theory on which otherwise valid prenups are set aside.

A Representative Prenup Matter from the Challenge Side

In a recent matrimonial matter where I represented the spouse seeking to set aside a prenuptial agreement, the agreement had been executed roughly ten years before the marriage ended. The substantive provisions were not unreasonable on their face. The challenge targeted formation: the circumstances of execution, the quality of disclosure, and the sufficiency of representation. DRL § 236(B)(3) and GOL § 3-303 require that each party had a fair and reasonable understanding of what they were waiving, and the formation record did not demonstrate that understanding. The matter resolved on a renegotiated allocation that captured a materially different outcome than the agreement would have produced on its face.

The lesson from the drafting side is that the prenup record must survive scrutiny ten or fifteen years later. Signing-day expedience produces documents that look fine at closing and come apart under challenge. The disclosure schedule, the representation record, the timing between presentation and execution, and the acknowledgment all matter at the moment the agreement is needed, not at the moment it is signed.

FAQ

Can a prenup waive spousal maintenance entirely?

A full waiver of spousal maintenance is enforceable in New York unless it is unconscionable at the time final judgment of divorce is entered. A waiver executed when both parties had meaningful income or assets, challenged years later after one spouse's circumstances have materially deteriorated, is subject to unconscionability review. A maintenance floor set at a reasonable guideline temporary maintenance amount is substantially more defensible than a bare waiver.

What if my spouse signed the prenup without a lawyer?

Independent counsel is not a strict legal requirement for enforceability, but the absence of independent counsel is a factor in formation challenges. A prenup executed without the non-moneyed spouse having independent representation, especially where the moneyed spouse's attorney drafted the agreement and the non-moneyed spouse had limited time to review, is in a weaker enforceability posture than one executed with full independent representation. Signing without a lawyer does not void the agreement, but it narrows the enforcing party's defensive position materially.

Can we modify or update the prenup after we are married?

Yes. New York enforces postnuptial agreements under DRL § 236(B)(3) on the same formalities as prenuptial agreements. A postnuptial agreement can modify or supersede the earlier prenuptial agreement. The disclosure requirements are at least as rigorous for postnuptials because the parties' financial circumstances have more detail at the time of execution. Updates on the birth of a child, acquisition of a business, or significant inheritance are a routine use case.

How much does an enforceable New York prenup cost?

Fees vary with complexity. A straightforward prenup addressing separate-property preservation and limited support provisions is typically produced in the $5,000 to $12,000 range per side. An HNW prenup with business interests, trust coordination, equity-compensation provisions, and multi-state assets runs materially higher. The cost of a thorough prenup is lower than the cost of defending a formation challenge years later; the drafting investment is a hedge against the enforcement litigation the agreement is designed to prevent.

Working With Counsel on a New York Prenup

A prenuptial agreement that holds up in New York is a drafting discipline, not a form. If you are considering a prenuptial or postnuptial agreement, or facing a challenge to one, contact Michel Law for a matrimonial consultation at (516) 440-3440 or schedule online. We draft and litigate nuptial agreements for clients in Nassau, Suffolk, Queens, Kings, Bronx, and Westchester.