A prenuptial agreement or post-nuptial agreement is a contract between you and your future spouse that is entered into before or after the marriage. In a prenuptial/post nuptial agreement, you and your spouse disclose to each other all the money and property you own before getting married.  Then, you set forth the rights and responsibilities each of you will have during the marriage, including how you will divide your money and property in the event of divorce or the death of one or both of you.

Although New York law already determines how property should be divided in the event a marriage ends in divorce or death, courts will recognize a valid prenuptial agreement that may be different from how New York law would divide the property.

 A prenuptial agreement is valid and can be enforced as long as it protects both you and your spouse and it was entered into with a full and fair disclosure of all assets by both you and your spouse.

A prenuptial agreement can address many different issues, including:

  • Defining separate property –    the property and assets you bring to a marriage are called separate  property. As long as you keep your separate property separate from the property you and your spouse obtain together, the separate property  continues to belong to you alone during and after your marriage. A prenuptial agreement should specifically identify which property is  separate property for each of you. However, if you do not keep your separate property separate then despite the prenuptial agreement, such property may later be considered marital property and divided  equally between you in a divorce.

  • Defining marital property –   just as you can identify each spouse’s separate property in a prenuptial  agreement, you can identify property you want to be considered as marital  property, even if it is actually separate property.

  • Establishing maintenance –    a prenuptial agreement can establish maintenance for you or your spouse during the marriage, particularly if one of you is giving up a career to “raise the kids.” For example, what maintenance one spouse will receive if  the marriage lasts for 5 years, 10 years or 15 years.

  • Establishing support for children of a prior marriage – if you bring minor children to a marriage and your spouse does not adopt them, a prenuptial agreement can help make sure the  children are provided for if you and your spouse divorce.

  • Establishing pre-marriage debt –  if you or your spouse brings substantial debt to the marriage, the prenuptial agreement can state that the debt stays with that spouse.

  • Child support and child custody/visitation – A prenuptial agreement cannot definitively address child support issues or custody issues for unborn children. Such issues must be resolved based on circumstances at the time of a separation or divorce. A court is obligated  by New York law to determine whether child support and custody  arrangements are in the best interests of a child, so such issues will ultimately  be reviewed by the court.

While prenuptial agreements are presumed to be enforceable, you or your spouse may challenge the validity of a prenuptial agreement for certain reasons, including:

  • Separate Attorneys – you  and your spouse should have separate attorneys if you are going to enter into a prenuptial agreement. If you do not have separate attorneys, the court will look at your prenuptial agreement more closely for unfairness and may not enforce the prenuptial agreement.

  • Fraud – if you or your spouse  fails to disclose your assets honestly, or if you hide your assets, a  court may not enforce the prenuptial agreement.

  • Coercion/Duress – if either you or your spouse uses pressure to get the prenuptial agreement signed or does not give the other enough time to consider the prenuptial agreement,  the court may not enforce the prenuptial agreement.

  • Unfair and Inequitable – if  the prenuptial agreement favors you or your spouse unfairly, for example by leaving the other spouse with nothing, the court may not enforce the  prenuptial agreement.

       Some content is cited from Charlotte Lee and Dalit Yarden, February 2015 (updated June 2020)