Cohabitation without marriage is becoming more common in the United States. Among eighteen- to forty-four-year-olds, the percentage of adults who have lived with an unmarried partner at some point is now higher than the percentage of adults who have been married.

When you live with a romantic partner, it may feel as though you share everything. And to some extent, this may be true, legally speaking. For example, there is a trend toward unmarried couples buying homes together. While this might make economic sense, especially at a time when household budgets are being stretched, it can also create legal complications.

Gifts that are given purely out of affection can create unintended consequences as well. This includes gift taxes and the relinquishing of control over the gift once it is accepted. Your heart might be in the right place, but without understanding gifts and joint ownership, you could be making a decision that you will come to regret.

Unmarried Partners and Cohabitation: A New Norm

Decades ago, it was rare—and even scandalous—for unmarried couples to live together. However, like many aspects of American life, this is changing.

Over the last two decades, the number of unmarried partners living together has almost tripled from 6 million to 17 million.^[1] Among young adults ages eighteen to twenty-four, cohabitation is now more common than living with a spouse.^[2] Among adults ages eighteen to forty-four, 59 percent have cohabitated as compared to 50 percent who have ever been married. Since 2002, the share of U.S. adults who are married is down. Over the same period, the share of adults living with an unmarried partner has more than doubled.