Imagine a couple who had been together for eight years making a decision that would have been unthinkable to them a decade earlier. They started sleeping in separate bedrooms.
"We were both zombies," one partner later described. "We'd go weeks not remembering what a full night's sleep felt like. And then we'd snap at each other over the smallest things, and neither of us could figure out why."
What they discovered is something that sleep researchers have been documenting for years: sharing a bed with a partner isn't always good sleep. In fact, when sleep is measured objectively, people actually sleep worse with someone else in the room. Yet despite this, most couples assume sleeping together is simply what you do. The idea that separate bedrooms might actually save a relationship has taken a long time to gain traction.
The Numbers Behind the Trend
The phrase "sleep divorce" sounds dramatic, but the practice is remarkably common. A 2025 survey from the American Academy of Sleep Medicine found that 31% of U.S. adults have opted for some form of it, sleeping either in a separate bed in the same room or in a completely different space [1]. The actual number who have maintained this arrangement long-term is smaller, around 1.4% according to a Sleep Foundation survey of 1,250 adults [3], but the numbers appear to be climbing.
The evidence for why it helps is fairly compelling. About 53% of people who try a sleep divorce report that their sleep quality improved [2]. Those who stick with it over time gain an average of 37 more minutes of sleep per night [2]. That might not sound like much, but chronic sleep deprivation has real consequences: it promotes depression, anxiety, and difficulty concentrating, and it increases the risk for chronic health problems like obesity, diabetes, heart disease, and cognitive decline [4].
Dr. Wendy Troxel, a sleep researcher at the RAND Corporation with over two decades of experience, puts it plainly: when both partners are well rested, they are less irritable and more supportive, which leads to a stronger relationship [6].
Why Your Partner Might Be Sabotaging Your Sleep
Here's something worth understanding: sleep among co-sleeping partners is highly interdependent. According to Troxel's research, roughly 30% of an individual's sleep quality is influenced by their bed partner's sleep [6]. That means if your partner snores, moves around frequently, or has a wildly different sleep schedule, you're not just tolerating it. It's actively disrupting your rest.
If you sleep with someone who snores, they can be responsible for up to 50% of your sleep disruptions [5]. Leg movements, different temperature preferences, competing schedules, any of these can erode sleep quality over time.
A 2014 study by Heather Gunn and Wendy Troxel tracked 46 couples using actigraphy, a method that measures sleep objectively. The researchers found that couples sleeping in the same bed were awake or asleep at the same time about 75% of the time [8]. That sounds intimate, but it also means that when one person has insomnia or an irregular schedule, both people's sleep suffers. The study also found that when wives reported higher marital satisfaction, couples were more in sync, suggesting the link between relationship health and sleep runs both ways [8].
The Relationship Equation Gets Complicated
This is where things get interesting, and a little contradictory.
Research by Troxel found that when male subjects slept worse, they reported that their relationship quality suffered the next day [5]. For women, the pattern was different: on days when female subjects were not happy about their relationship, both her sleep and her husband's sleep suffered that night [5]. The direction of causality isn't always clear, but the feedback loop is undeniable.
One thing that does seem consistent: mismatched couples have lower levels of relationship satisfaction, more conflict, and less sexual activity [5]. Couples who are in sync with their sleep, meaning they fall asleep and wake at similar times, report higher relationship quality overall. But here's the catch, most people still say they prefer sleeping with their partner, even when the objective data says they sleep worse [5]. Troxel suggests this reflects how the social brain prioritizes closeness and security over raw sleep quality.
There's also a generational divide in what drives people apart. A survey of 800 people found that snoring was the deciding factor for 68% of Baby Boomers, while conflicting sleep/wake schedules pushed 63% of Millennials toward separate sleeping [7]. Millennials were also more likely to cite sleep disorders as a reason, with 54% reporting this compared to just 22% of Baby Boomers [7].
Rethinking the Language
Troxel has proposed replacing the term "sleep divorce" with "sleep alliance," arguing that the word "divorce" carries unnecessary stigma [6]. It's a small linguistic shift, but it captures something important: separate sleeping doesn't have to mean emotional withdrawal. It can be a deliberate, collaborative choice made by two people who want to protect both their rest and their relationship.
The COVID-19 pandemic actually provided an accidental experiment. Some couples, out of necessity, ended up sleeping apart during that period. Many found that their sleep quality and overall relationship satisfaction improved significantly [6]. That real-world data aligns with what controlled research had suggested.
Harvard Health sleep specialist Dr. Stephanie Collier recommends thinking of a sleep divorce not as a failure but as "a healthy change to enhance each partner's sleep" [4]. That's a useful reframing for couples who might feel embarrassed or worried about what it means for their bond.
How to Decide If It's Right for You
If you're considering this, experts suggest starting with smaller compromises before going fully separate. Earplugs, sound machines, sleeping on your side to reduce snoring, or simply having two separate blankets in the same bed can help [4]. The "Scandinavian sleep method," where couples use separate bedding in the same bed, is often proposed as a middle ground [2].
If you do decide to try sleeping apart, both parties need a good mattress and a comfortable sleeping environment that's cool, dark, and inviting [4]. And don't have the conversation at 2 a.m. after a sleepless night. Lack of sleep compromises emotion regulation and problem-solving, so the worst time to discuss a major relationship adjustment is when you're already exhausted [6].
To maintain intimacy when sleeping apart, schedule closeness before bedtime and then move to separate rooms [4]. Build in regular check-ins to make sure the arrangement is working for both of you. As Dr. Collier puts it, "It's not good enough if it's helpful only for one person" [4].
About one in four couples who try separate sleeping eventually return to sharing a bed [2]. For 34.9% of those who recouple, missing each other was the reason they got back together [3]. That's a useful reminder that sleep arrangements can evolve. What works now doesn't have to work forever. The goal is the same as it always has been: two people getting enough rest so they can show up for each other, and for themselves, in the morning.