For decades, a common belief held that couples who lived together before marriage were more likely to get divorced. This idea, known as the “cohabitation effect,” has been the subject of extensive sociological research. However, a foundational study from 2003, along with more recent data, clarifies this link, suggesting the risk is not about living together, but rather about a person’s relationship history.
The long-held assumption was that the experience of premarital cohabitation and divorce were linked, perhaps because the experience made couples less committed to the institution of marriage. However, as living together has become more common, this simple link has become less clear. Research now points to a more nuanced explanation: the number of partners a person has, not the act of cohabiting, is the key predictor of marital stability.
The number of partners is the key risk, not cohabitation
A key 2003 study by sociologist Jay D. Teachman, published in the Journal of Marriage and Family, provided a critical clarification. Using data from the 1995 National Survey of Family Growth, Teachman examined the relationship histories of women to see how premarital sex and premarital cohabitation affected their risk of divorce.
The study’s findings were clear:
- One Partner: Women whose premarital sex or cohabitation was limited to their future husband showed no elevated risk of divorce compared to women with no premarital partners.
- Multiple Partners: Women who had more than one intimate premarital relationship (either sexual or cohabitational) had a significantly increased risk of marital dissolution.
This research was groundbreaking because it suggested that cohabitation itself does not weaken marriage. Instead, the risk factor appears to be the experience of having multiple partners before settling down. This finding has been supported by more recent research, which also identifies the number of premarital partners as a primary risk factor.
Why “serial cohabitation” increases divorce risk
Later research built on Teachman’s findings by identifying a specific pattern called “serial cohabitation.” This term describes the practice of living with multiple partners in a series of short-term or medium-term relationships without a long-term commitment like marriage.
Studies consistently find that individuals who engage in serial cohabitation have a much higher rate of divorce if they do eventually marry. This is often explained by a “selection effect.” This theory suggests that people who are willing to move in (and break up) with multiple partners may, as a group, have personal characteristics that also make them more prone to divorce. These might include:
- Less traditional views on marriage and commitment.
- A lower threshold for ending a relationship when problems arise.
- Personality traits that make long-term partnering more challenging.
In this view, it is not the act of living together that causes divorce; rather, the type of person who engages in serial cohabitation is also the type of person who is more likely to divorce.
“Sliding” vs. “Deciding”: Cohabiting before engagement
Further research has refined this idea even more, distinguishing between “sliding” into cohabitation and “deciding” on it. Studies by researchers Scott Stanley and Galena Rhoades highlight a “pre-engagement cohabitation effect.”
They find that couples who move in together after making a clear commitment to marry (like getting engaged) have divorce rates similar to couples who do not live together before marriage at all. The risk is concentrated among couples who “slide” into living together without a formal engagement or clear discussion about the future. For these couples, cohabitation can create “inertia”, it makes it harder to break up, leading some to “slide” into a marriage that they might not have otherwise chosen.
A normal part of modern courtship
Teachman’s 2003 study concluded with the idea that premarital sex and cohabitation limited to a future spouse “has become part of the normal courtship process for marriage.” Data from the following decades has strongly confirmed this.
According to a 2019 report from the Pew Research Center, cohabitation is now a mainstream experience in the United States. The report found that a majority of adults (59%) ages 18 to 44 have lived with an unmarried partner at some point. Furthermore, a large share of young adults (63% of those under 30) believe that living together before marriage is a good step that can improve the chances of a successful marriage.
This widespread acceptance supports the idea that, for most couples, cohabitation is seen as a practical step toward marriage, not an alternative to it. It has become a key part of the five stages of long-term relationships for many people.
What you can do about it
The research on premarital cohabitation and divorce provides a clear takeaway: the risk is not in the act of living together, but in the context surrounding it.
- Correlation vs. Causation: This data is observational. It shows a correlation, not a direct cause.
- Communication is Key: The difference between “sliding” and “deciding” highlights the importance of communication. Experts suggest that the highest-risk behavior is moving in together without a clear, mutual understanding of what the step means for the future of the relationship.
- Understand the “Inertia” Risk: Be aware that living together makes it logistically, financially, and emotionally harder to break up. This can sometimes trap couples in a relationship that isn’t right for them, leading to an unhappy marriage and potential divorce.
Ultimately, the evidence suggests that a couple who moves in together after making a clear and deliberate commitment to a shared future has not increased their risk of divorce.
Sources & related information
Journal of Marriage and Family – Premarital Sex, Premarital Cohabitation, and Marital Dissolution – 2003
This is the foundational study by Jay D. Teachman that analyzed 1995 NSFG data. It found that premarital intimacy (sex or cohabitation) limited to a future spouse does not increase divorce risk, but having more than one premarital partner does.
Pew Research Center – Marriage and Cohabitation in the U.S. – 2019
This report provides comprehensive data on modern relationship trends. It shows that a majority of Americans have cohabited, and many view it as a positive step toward marriage. This supports the conclusion that cohabitation with a future spouse is a normal part of courtship.
National Council on Family Relations – The Pre-engagement Cohabitation Effect – 2018
This research, led by Scott M. Stanley and Galena K. Rhoades, refines the “cohabitation effect.” It finds the highest risk is for those who cohabit before forming a clear engagement or commitment to marry, a phenomenon they describe as “sliding” rather than “deciding.”
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