When do couples actually move in together?
The decision to share a home is one of the biggest relationship milestones there is, but most couples have no idea whether their timing is fast, slow, or completely typical. Research has also uncovered something striking about how the decision gets made, not just when. It turns out the process matters more than most people realise. Enter your timeline to see where you stand.
Querying population data…
When did you say I love you?
Days from first date to "I love you" by age.
When do most couples move in together?
US Census Bureau Survey of Income and Program Participation (SIPP) data and academic survey research consistently find that the median time couples date before moving in together is approximately 12 to 18 months. The most commonly cited figure is around one year. Roughly 8% of couples move in within three months, 15% between three and six months, 22% between six and twelve months, and 30% between one and two years. After two years, the proportion who move in during any given period declines.
These figures vary by age cohort, educational level, and cultural background. Younger adults, particularly under 30, tend to cohabit earlier relative to relationship duration than older adults. UK Office for National Statistics data shows a broadly similar distribution, though UK cohabitation has grown more rapidly as a proportion of all partnerships over the past two decades.
Does moving in together too fast cause problems?
The evidence is more nuanced than a simple fast-equals-bad conclusion. A widely replicated finding is the “cohabitation effect”: people who cohabit before engagement or marriage historically showed higher divorce rates than those who did not. However, research by Manning and Cohen (2012) found this effect has largely disappeared for more recent cohorts, particularly when couples had a clear intention to marry before cohabiting. The timing of the decision relative to commitment matters more than the calendar date.
Rhoades, Stanley, and Markman (2009) identified a specific mechanism: couples who “slide” into cohabitation, drifting together without an explicit discussion, reported lower relationship quality than those who made a deliberate joint decision. This sliding versus deciding distinction is the most practically useful finding for individual couples.
What is the sliding versus deciding research?
Scott Stanley, Galena Rhoades, and Howard Markman’s research, published in the Journal of Family Psychology (2009), found that couples who moved in together as a result of inertia, for example sharing a lease, spending so many nights at each other’s place that it became the de facto arrangement, or one partner needing a place to stay, reported significantly lower relationship quality and higher rates of subsequent relationship dissatisfaction compared to those who had an explicit conversation and made a joint decision to cohabit. The researchers coined the terms “sliding” versus “deciding” to describe the two pathways. The sliding effect was particularly pronounced for couples who later married.
Frequently asked questions
The research consensus has shifted substantially on this. Earlier studies found that premarital cohabitation was associated with higher divorce rates, but more recent research, including a major Pew Research Center analysis, finds that among people who had a clear intention to marry at the time they moved in, there is no significant difference in divorce rates compared to those who waited. The key variable appears to be clarity of commitment rather than the legal status of the relationship at the time of cohabitation.
Approximately 8% of couples in US survey data report moving in within three months of starting to date. This is the least common timing band in population data. However, the proportion is higher in specific subgroups, including couples with prior cohabitation experience, older adults who have been through previous relationships, and couples in certain cultural contexts where early cohabitation is more normalised. Internationally, the figure varies considerably: it is higher in Scandinavian countries and lower in more traditionally conservative cultures.
No. Data from the CDC National Survey of Family Growth shows that approximately 40% of cohabiting relationships in the US do not result in marriage. Of those that do, the median time from cohabitation to marriage is approximately three years. Cohabitation functions differently in different countries: in Sweden and France, for example, long-term cohabitation without marriage is common and socially normalised as an endpoint rather than a stepping stone. In the US, marriage rates among cohabiting couples vary significantly by age, education, and cultural background.
Research on what predicts positive cohabitation outcomes points to several key areas: financial arrangements and contribution expectations, domestic task distribution (one of the most common sources of cohabiting conflict), long-term relationship intentions, boundaries around space and privacy, and conflict resolution approaches. Rhoades et al.’s work on sliding versus deciding suggests that the quality of this conversation, and whether both partners feel equally committed to the decision, matters significantly for subsequent relationship quality. Couples who move in with unresolved ambivalence about the relationship tend to show worse outcomes than those who have explicitly addressed their commitment level.
- Rhoades GK, Stanley SM, Markman HJ. The pre-engagement cohabitation effect: a replication and extension of previous findings. Journal of Family Psychology. 2009;23(1):107–111.
- US Census Bureau. Survey of Income and Program Participation. 2023.
- Manning WD, Cohen JA. Premarital cohabitation and marital dissolution: an examination of recent marriages. Journal of Marriage and Family. 2012;74(2):377–387.