Understanding Prenuptial vs Postnuptial Agreements: Which Is Right For You in NY?
- Catherine Dominici
- Jan 2
- 2 min read
Updated: Jan 17

Definitions & Differences
A prenuptial agreement is a contract signed before marriage; a postnuptial agreement is similar but after marriage. Both allow spouses to define financial expectations, asset division, and support in case of divorce.
When Each Agreement Is Appropriate
Prenups are best when entering marriage with significant assets, business interests, children from previous marriages, or sharp income disparities.
Postnups can help couples who didn't sign prenup, but later wish to clarify financial rights or after major life changes (inheritance, new business, etc.).
Legal Requirements in New York
Must be in writing, voluntary, with full financial disclosure.
No coercion; each party should ideally have independent legal counsel.
Agreement must be fair and conscionable at time of signing and not be unconscionable at enforcement.
Pros & Cons
Prenuptial agreements provide control over asset division and reduce uncertainty, but may be challenged if not properly executed. Postnuptial agreements offer similar protections but courts may scrutinize them more closely.
FAQ
Q: Can a prenuptial agreement override New York's divorce laws? A: Not entirely. Courts will refuse to enforce if agreement is unfair, lacks proper disclosure, or was signed under duress.
Q: Are postnuptial agreements treated differently? A: Similar rules apply, though courts may scrutinize postnuptial agreements more if one spouse was under pressure or circumstances have shifted substantially.
Q: Do these agreements specify child custody or support? A: No – courts generally do not allow agreements to pre-determine child support or custody because these are based on the best interests of the child at the time of divorce.
About the Author
Catherine L. Dominici, Esq. is a highly experienced Matrimonial & Family Law attorney in Stony Brook, NY. Admitted to practice since 2010, she specializes in divorce, child custody, support, prenuptial/postnuptial agreements, and complex asset division. Known for her compassionate representation, deep knowledge of New York's court system, and dedication to achieving favorable outcomes while reducing client stress.



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