Cohabitation agreements (also known as nonmarital agreements) are similar to prenuptial agreements for couples who are planning to marry—but cohabitation agreements are for people who are living together and having a sexual relationship without being married. These agreements address issues that may arise during the relationship (payment of rent and other expenses, household chores)—and issues that may arise if the cohabitation relationship ends (ownership and division of home or other property, support).

In New Hampshire, cohabitation agreements, also known as nonmarital agreements, are recognized and enforceable. These agreements are designed for couples who live together without being married and want to outline the financial and property arrangements during and after their relationship. Such agreements can include terms for the payment of expenses, division of chores, and the division of property and assets if the relationship ends. While New Hampshire law does not specifically legislate cohabitation agreements, they are generally upheld by courts as long as they are in writing, entered into voluntarily by both parties, and both parties have had the opportunity to consult with an attorney. It is important for individuals entering into a cohabitation agreement to ensure that it is fair, fully discloses all assets, and does not violate public policy or law. If the agreement meets these criteria, it is likely to be considered valid and enforceable by New Hampshire courts.