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 Arizona, 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 household chores, and the division and ownership of property. In the event of a breakup, a cohabitation agreement can also address issues such as support or compensation, similar to how a prenuptial agreement functions for married couples. It's important for individuals entering into a cohabitation agreement in Arizona to ensure that the agreement is in writing and that both parties fully understand and agree to the terms, as verbal agreements may be more challenging to enforce. Consulting with an attorney to draft or review a cohabitation agreement is advisable to ensure that it meets legal requirements and adequately protects the rights of both parties.