To get a prenup in New York, you and your future spouse each hire your own attorney, exchange complete financial disclosure, negotiate written terms allowed under Domestic Relations Law Section 236(B)(3), and sign the agreement in front of a notary well before the wedding.1New York State Senate. New York Domestic Relations Law 236 – Special Controlling Provisions; Prior Actions or Proceedings; New Actions or Proceedings Miss one of those procedural requirements and a court can throw out the whole agreement years later. The details matter more than most couples expect.
Start Early
New York has no statutory deadline for how far in advance of the wedding a prenup must be signed. Timing is still where most couples make their biggest mistake. Signing days before the ceremony hands the other spouse a ready-made argument that they felt pressured and couldn’t meaningfully negotiate.
Begin the process at least three months before the wedding, and aim to have the agreement signed at least one month before the ceremony. That gives both attorneys room to negotiate without rushing, gives both parties time to read drafts carefully, and removes any plausible claim that the wedding itself created pressure to sign. New York courts have held that proximity to the wedding alone doesn’t automatically invalidate a prenup, and that even a threat to cancel the wedding isn’t enough duress on its own. There’s no reason to test those boundaries.
Hire Separate Attorneys
New York doesn’t technically require each party to hire their own attorney. Skipping this step is still one of the fastest ways to get a prenup tossed out. When both parties don’t have separate lawyers, courts scrutinize the agreement far more aggressively for unfairness and are more willing to set it aside. One lawyer cannot represent both of you — the interests are inherently adverse.
Each side’s attorney handles drafting or review from that client’s perspective, formally exchanges financial disclosure through the other side’s lawyer, and signs off on the final document. The paper trail created by that back-and-forth is itself part of what makes the agreement defensible later.
Exchange Full Financial Disclosure
Incomplete or dishonest disclosure is the single most common reason prenups fail. New York courts have consistently treated hidden assets or understated income as grounds to void the agreement, and at that point the party who concealed information loses the protections the prenup was supposed to provide. Both parties need an accurate picture of what the other owns, owes, and earns before signing.
Gather these materials before your first attorney meeting:
- Assets: real estate deeds and recent appraisals, bank account statements, investment and brokerage statements, retirement account balances (401(k), IRA, pension), business ownership documents and valuations, and life insurance policies.
- Debts: mortgage statements, student loans, auto loans, credit card balances, personal loans, and any other outstanding obligations.
- Income: recent pay stubs, the last two to three years of federal and state tax returns, and any other income sources such as rental income, freelance work, or trust distributions.
- Digital assets: cryptocurrency holdings across all wallets, NFTs, staking rewards, and other blockchain-based investments. Document wallet addresses and approximate values at the time of disclosure.
- Expected future assets: anticipated inheritances or trust distributions. Disclosing these avoids later disputes about whether one party misled the other.
Both parties should prepare disclosures at the same time. The formal exchange happens through your respective attorneys, which creates documentary proof that disclosure actually occurred.
Decide What the Agreement Will Cover
New York law allows prenups to address a broad range of financial topics. Domestic Relations Law Section 236(B)(3) specifically permits provisions covering property ownership and division, spousal maintenance (what most people call alimony), and testamentary arrangements like wills and inheritance rights.1New York State Senate. New York Domestic Relations Law 236 – Special Controlling Provisions; Prior Actions or Proceedings; New Actions or Proceedings Most couples use some combination of the following:
- Separate versus marital property. Defining which assets each person keeps as separate and which become shared, regardless of how default law would classify them.
- Business interests. Shielding a business one spouse owns from division in a divorce, or capping the other spouse’s claim to appreciation during the marriage.
- Debt protection. Keeping one spouse’s premarital student loans or credit card balances from becoming the other’s responsibility.
- Spousal maintenance. Setting the amount and duration of support, or waiving it, subject to the limits below.
- Inheritance and estate rights. Waiving the right to elect against a spouse’s will, which otherwise lets a surviving spouse claim a share of the estate regardless of what the will says.
Know What a Prenup Can’t Decide
Some topics are off-limits regardless of how carefully you draft them. New York courts will not enforce prenuptial provisions about child custody or child support. Custody is decided on the child’s best interests at the time of divorce, and child support is set by the Child Support Standards Act formula using each parent’s income at the time of separation. Custody or support clauses will be struck, though the rest of the agreement can survive.
Spousal maintenance waivers face a different limit. You can waive or cap maintenance, but New York General Obligations Law Section 5-311 prohibits any agreement that would leave a spouse unable to support themselves and likely to become a public charge.2New York State Senate. New York General Obligations Law 5-311 – Certain Agreements Between Husband and Wife New York courts have also required that a maintenance waiver be a “knowing waiver”: both parties must understand the dollar value they’d receive under the statutory formula before giving it up. A vague blanket waiver without that calculation is vulnerable.
Retirement Accounts: The ERISA Problem
This is where prenups hit an unexpected wall. If your agreement includes a waiver of rights to your spouse’s 401(k), pension, or other employer-sponsored retirement plan governed by federal law, the waiver almost certainly won’t hold up when signed before the wedding. Federal law under ERISA requires that a waiver of survivor benefits from a qualified retirement plan be made by a “spouse,” and a prenuptial agreement by definition is signed before the marriage exists. Federal courts have consistently held that a fiancé cannot waive spousal rights to ERISA-governed retirement benefits.3Office of the Law Revision Counsel. 29 USC 1055 – Requirement of Joint and Survivor Annuity and Preretirement Survivor Annuity
The fix: sign a postnuptial agreement after the wedding that confirms the retirement benefit waiver from the prenup. That postnuptial waiver must be in writing, witnessed by a plan representative or notary, and must designate an alternate beneficiary. Without this follow-up, the retirement provisions in your prenup are essentially decorative. Ask your attorney to calendar the postnuptial confirmation as part of the process. IRAs are not subject to ERISA and generally don’t face this same obstacle.
Draft, Negotiate, and Sign Before a Notary
One party’s attorney drafts an initial version based on that client’s goals. The other party’s attorney reviews it, flags concerns, and proposes changes. Expect several rounds. If the attorneys are doing their jobs, they’re pushing back on provisions that would hurt their clients or create enforceability problems.
During negotiation, you’ll decide how property gets divided, who keeps what, how spousal support will work, and how debts get allocated. You’ll also decide what triggers particular provisions. Some couples include sunset clauses that expire the agreement, or specific terms within it, after a set number of years of marriage. Common timelines run from five to twenty years.
Execution is more formal than most people expect. Section 236(B)(3) requires that the agreement be in writing, signed by both parties, and acknowledged or proven in the manner required for a deed to be recorded.1New York State Senate. New York Domestic Relations Law 236 – Special Controlling Provisions; Prior Actions or Proceedings; New Actions or Proceedings In practice, both parties sign before a notary public. The statute also allows acknowledgment before anyone authorized to perform marriages in New York. A missing notarization or an improperly acknowledged signature can invalidate the agreement, and the “substantial compliance” argument is a gamble. Follow every procedural requirement to the letter.
The terms covering maintenance must be fair and reasonable when the agreement is made, and the agreement as a whole must not be unconscionable at the time a court is asked to enforce it. An agreement is unconscionable when it’s so one-sided no reasonable person would have accepted it; a lopsided split alone usually isn’t enough.
What It Costs
Attorney fees are the main expense. A prenuptial agreement drafted by a New York family law attorney typically runs between $3,500 and $5,000 per side. Complex agreements involving business valuations or significant assets push well beyond that. New York City attorneys frequently bill between $300 and $600 per hour, and the total depends on how many rounds of negotiation the agreement takes. Each party needs their own attorney, so the combined cost for the couple is roughly double the per-side figure.
Beyond attorney fees, you may need asset appraisals (real estate, businesses), financial advisor consultations, and the notary acknowledgment. New York caps the notary fee at $2 per signature. Couples who try to save by sharing a lawyer or skipping disclosure spend far more in litigation when the prenup is challenged.
After You’re Married
The prenup takes effect when you get married, not when you sign it. If the wedding doesn’t happen, the agreement has no legal force. Once you’re married, both parties should keep original signed copies somewhere secure. Your attorney’s office is one option; a safe deposit box is another. Don’t rely on a single copy.
New York lets couples modify or completely revoke a prenup after signing, but any change must follow the same formalities as the original: in writing, signed by both parties, and properly notarized.1New York State Senate. New York Domestic Relations Law 236 – Special Controlling Provisions; Prior Actions or Proceedings; New Actions or Proceedings A verbal agreement to forget about the prenup is not enforceable. If your financial circumstances shift significantly — a new business, an inheritance, the birth of a child — revisiting the agreement with your attorneys is worth the cost.