Prenuptial Agreements in New York: What the Law Requires

A prenuptial agreement is a contract the two of you sign before marriage that sets your own rules for money and property if the marriage ends in divorce or death. The NYC Bar (checked September 28, 2026) describes it as a way to decide in advance how property, debt and support will be handled, instead of leaving those questions to the default rules of New York divorce law.

It has a few relatives worth knowing by name. A postnuptial agreement does the same job but is signed after the wedding. A separation agreement and a marital settlement agreement come later still, when a couple is separating or divorcing. The NYC Bar's overview of marital agreements (checked September 28, 2026) lays out the differences.

On the wedding side, nothing about the prenup touches the City Clerk. You apply for the marriage license, book your City Hall slot or choose your officiant, and hold the ceremony exactly as you would without one. The Clerk does not review, approve or file a prenup, and a signed agreement is not something you bring to your license appointment. The NYC Marriage License, Step by Step covers that side of the paperwork.

The statute is short, and every word of it counts. Domestic Relations Law section 236(B)(3) says an agreement made before or during the marriage is valid and enforceable if it is in writing, subscribed by the parties, and acknowledged or proven in the manner required to entitle a deed to be recorded. In practice that gives you five things to get right:

1. The agreement is written down. A spoken understanding does not count.
2. Both of you sign it.
3. Each signature is acknowledged before an officer who can take a deed acknowledgment, which usually means a notary public.
4. The acknowledgment certificate carries the correct identity and acknowledgment language.
5. The acknowledgment happens at about the same time as the signing.

That last point comes from Anderson v. Anderson (2021, checked September 28, 2026). There, one spouse's signature was acknowledged after the wedding and the other's nearly seven years later, and the court held the agreement unenforceable. The acknowledgment must be contemporaneous with the signing, though not necessarily in the same minute. A notary cannot rescue an agreement signed long ago.

You will hear people say a prenup "has to be notarized." That is close, but the legal test is deed-level acknowledgment or proof, and the certificate and timing matter as much as the stamp. The statute also allows the acknowledgment of an agreement made before marriage to be taken by a person authorized to solemnize a marriage, which is one reason Who Can Officiate a Wedding in NYC is worth a look if you plan to sign close to the ceremony. Your lawyer will tell you which option fits your signing.

New York gives couples a lot of room on the financial side. Under section 236(B)(3), an agreement can include:

• Who owns what, and how separate and marital property will be divided or distributed.
• The amount and length of maintenance (spousal support, often called alimony), including a waiver.
• Provisions for each other's wills, and a waiver of the right to claim a share of the other's estate against their will.
• Other terms of the marriage relationship, subject to General Obligations Law section 5-311.

A prenup is not limited to what you each own on the wedding day. It can also classify property you acquire during the marriage, such as whether future earnings from a business stay separate. That is why it tends to come up for a partner who owns a company, expects an inheritance, holds real estate or retirement savings, carries significant debt, or has children from an earlier relationship whose inheritance they want to protect. Rapp v. Rapp (2018, checked September 28, 2026) discusses how courts read these provisions.

The limit sits beside the permission: a term is only as good as the circumstances it was made in. Courts look at fairness, full disclosure, fraud, duress, overreaching and whether a term has become unconscionable by the time of the final judgment.

The statute mentions the custody, care, education and maintenance of a child, but only subject to Domestic Relations Law section 240, and that qualifier does a lot of work. The NYC Bar explains that a prenup cannot definitively settle custody or child support for children who are not yet born. If those questions ever arise, a court decides them based on the child's best interests and the child support rules in force at that time.

In plain terms, you can write down how you each hope to handle education or support, but you cannot sign away a future child's right to support or fix custody in advance.

No New York statute sets a number of days. What the law does care about is whether each of you signed voluntarily, with time to understand the agreement and consult a lawyer. A draft that appears a week before the wedding, with the venue booked and guests flying in, is exactly the situation that leads to later arguments about duress, coercion or overreaching.

In M.M. v. D.M. (2018, checked September 28, 2026), a court upheld an agreement signed shortly before the wedding because the evidence did not show coercion. That is not a safe deadline; it shows the facts around the signing are what get examined.

A practical plan is to start the conversation several months before the wedding. One New York prenup service, NYC Prenup (checked September 28, 2026), recommends starting three to six months ahead; treat that as a planning recommendation rather than a rule. Work backward from the date: first conversation, hiring lawyers, exchanging financial information, drafting, one or more rounds of revisions, then signing with acknowledgment at the same sitting. If you are marrying on a short timeline, How to Get Married in NYC This Week covers the license side; if a careful prenup will not fit before that date, ask a lawyer about a postnuptial agreement signed after the wedding instead.

New York does not make separate lawyers a condition of validity. In M.M. v. D.M., the court said the lack of independent counsel, without more, was not enough to set the agreement aside.

The NYC Bar says each partner should have a separate attorney, and when one lawyer effectively represents both of you, a court is more likely to question whether the other partner understood what they signed. A lawyer of your own explains the draft from your side, negotiates changes you want, and creates a record that you had advice. R.S. v. L.F.S. (2018, checked September 28, 2026) shows the kinds of questions courts ask about acknowledgment, identity and the circumstances of the financial review.

The general information on this page is not legal advice for your own agreement. Questions about your situation, including what to include, how to phrase it and whether a term will hold, go to a New York family lawyer, and the New York State Bar Association Lawyer Referral Service is a good place to find one.

Before your first meeting, each of you can pull together:

• Bank, brokerage and savings account statements.
• Retirement accounts and their current balances.
• Real estate you own, with deeds and mortgage balances.
• Any business interest, with ownership documents and recent financial statements.
• Debts, including student loans, credit cards and car loans.
• Recent income records, such as tax returns or pay statements.
• Expected inheritances, trusts you benefit from, and any existing will or estate plan.
• Assets outside the United States, if you have them.

Exactly what must be disclosed, and in what form, is a question for your lawyer. The NYC Bar is clear that full and fair financial disclosure matters, and hidden property is one of the grounds on which agreements are challenged. Your lawyers will usually exchange this information with each other.

Once the agreement is signed, keep the original somewhere safe. An expanding file folder keeps drafts, disclosures and correspondence in one place while you work, and a fire-resistant document box or a scanned, encrypted backup protects the signed copy afterward.

There is no official statewide fee. Published figures come from law firms and legal marketplaces, and they vary widely:

• Aiello & DiFalco, a New York law firm, estimated about $1,000 to $3,000 for a straightforward prenup and $3,000 to $10,000 or more for complex agreements (posted December 8, 2025).
• NYC Prenup listed a $799 flat-fee drafting service (checked September 28, 2026). A January 22, 2024 article on its site put a traditional law-firm average at $3,500 to $5,000, which is the company's own estimate.
• ContractsCounsel reported marketplace averages of $960 to draft and $650 to review, based on 63 recent projects on its platform (updated September 1, 2026).

The number you pay depends on the work involved. Hourly billing versus a flat fee, a business or several properties, trusts, retirement accounts, assets abroad, translation, appraisals, several rounds of drafts, and a second lawyer for the other partner all move the total. Remember that a flat drafting price usually covers one side; if each of you has your own lawyer, budget for both. Ask each lawyer at the first meeting how they bill and what the quote includes, since these are private prices that change.

The most direct route is the New York State Bar Association Lawyer Referral Service (checked September 28, 2026). Referrals are free, the first 30 minute consultation costs $35, and the service aims to have a lawyer contact you within five working days. Referred lawyers are screened for New York eligibility, good standing and insurance. Any fees after that first consultation are agreed between you and the lawyer.

For background reading, the NYC Bar's prenuptial agreement page is a clear plain-language overview. New York's court help pages explain procedures, but court staff cannot give legal advice or tell you what to write. Family Court resources focus on support, custody and similar cases, and a prenup is a private agreement rather than a court form, so a family lawyer is the right person for this.

If you prefer to work in Spanish, ask the referral service for a Spanish-speaking family lawyer when you call.

A few more details couples often want to know.

If a prenup is on your list, the next move is to book a first consultation, for each of you, as early in your planning as you can. The NYSBA Lawyer Referral Service is a straightforward place to start, and your gathered financial documents will make that first meeting count. For the parts of getting married the prenup does not touch, head to The NYC Marriage License, Step by Step. If you are marrying here from another state or country, Getting Married in NYC as a Visitor or From Abroad covers the license and documents, and Getting Your NYC Marriage Certificate, the Extended Copy and the Apostille explains the records you may need afterward.