A two‑part study examining the hidden work that goes into running a relationship finds that the mental and emotional burden women bear at home may matter more to their happiness with a partner than the amount of physical chores they share. Led by Verena Klein of the University of Southampton, the research suggests that the unseen “mental load” predicts women’s relationship and sexual satisfaction more consistently than who cleans or cooks. In contrast, men tended to report greater relationship satisfaction when their female partners carried more of this intangible labour.
Traditionally, research on domestic division has focused on visible tasks—washing dishes, taking out the rubbish, tidying the house. The new work argues that domestic life also hinges on the mental load: the cognitive planning and emotional management that keep a household running, from foreseeing needs to scheduling appointments and monitoring a partner’s feelings.
As the researchers summarise, the mental load is often invisible, with no clear boundaries or finish line. Unlike chores, it can intrude at any hour—restocking groceries, managing a school calendar, or sensing distress in a partner.
Previous qualitative work has shown women disproportionately shoulder planning and monitoring duties, a pattern that can strain relationships. This sits alongside broader patterns in romantic dynamics, such as evidence that reduced personal power in relationships can disproportionately affect women.
The Southampton team designed two studies to test whether the mental load predicts romantic and sexual satisfaction independently of physical housework. They preregistered the first study’s design and planned analyses, noting that past research often treated domestic work as merely physical actions.
In the first study, 452 heterosexual women from the United Kingdom with a male partner participated. Their average age was around 42, relationship lengths ranged from 1 to 44 years, and about half had at least one child. They completed questionnaires about how they and their partners divided mental load, who carried out routine physical chores, and how strongly they endorsed traditional gender roles. Relationship and sexual satisfaction were measured with single items on numerical scales.
To measure mental load, the researchers created a 17‑item scale spanning five areas: family management, household management, emotional labour related to children, emotional labour focused on the partner, and relationship nurturing. The scale yielded two broad measures: relationship mental load (household organisation and partner‑focussed emotional care) and parental mental load (child‑focused organising and reassurance). Participants rated who performed each task on a five‑point scale from “more me” to “more my partner.”
The findings from Study 1 showed that women reported higher relationship and sexual satisfaction when their male partners were more involved in the mental load of the relationship. The associations were modest: about 0.24 for relationship satisfaction and 0.15 for sexual satisfaction on the correlation scale.
Looking at specific facets, emotional labour—sensing when a partner is upset and planning romantic events—was linked to higher sexual satisfaction, whereas administrative cognitive tasks alone did not show the same link. Parental mental load correlated with greater relationship satisfaction for mothers, though it did not have a statistically significant direct link to sexual satisfaction.
In regression analyses that included physical housework, gender ideology, and relationship mental load simultaneously, mental load emerged as the only predictor of women’s relationship and sexual satisfaction. However, its link to sexual satisfaction disappeared once overall relationship satisfaction was accounted for, and parental mental load did not predict sexual satisfaction. Physical housework distribution and traditional gender attitudes ceased to predict satisfaction once mental load was included.
Importantly, women’s mental load appeared largely independent of whether they held traditional or egalitarian views on gender roles. The researchers noted that even women who rejected conventional domestic expectations could still carry a disproportionate share of the mental load.
“What surprised me most was the role, or rather, the lack of a role, of women’s gender-role attitudes,” Klein told PsyPost. “We expected traditional attitudes to be associated with a more unequal division of housework, and they were. But mental load was different: gender ideology basically didn’t explain who carried it. Even women who explicitly held egalitarian views could still be carrying a disproportionate share.”
“That’s what made this result stick with me: this isn’t simply a belief problem,” she added. “You don’t have to believe that you should be responsible for these things to end up being responsible for them. That doesn’t mean egalitarian attitudes don’t matter. But our findings suggest that they don’t automatically translate into equality in everyday practice.”
To capture how both partners perceive division of labour, the researchers conducted a second study with a dyadic design not preregistered. They recruited 156 heterosexual, cohabiting couples from the United Kingdom and the United States, with an average age of about 38 and a mean relationship length of 13 years. Both partners completed the same questionnaires and single‑item satisfaction measures, and the researchers used the Actor‑Partner Interdependence Model to analyse how each person’s reports predicted satisfaction for both partners.
Across the couples, both partners agreed that women performed more household chores and carried a substantially larger mental load. On the mental‑load scale, women’s average score for relationship mental load was 2.31, versus 3.36 for men (higher scores indicate that the partner carried more). For parental mental load, the figures were 1.71 for women and 3.53 for men, with physical chores scored at 2.57 and 3.18 respectively.
“What’s striking is how clear this inequality was,” Klein noted. “In our couples data, both women and men reported that women were carrying more of it, this wasn’t just women perceiving an inequality that men didn’t see. Both partners’ reports pointed the same direction.”
In terms of outcomes, considerable gender differences emerged. For women, relationship and sexual satisfaction peaked when relationship mental load was shared more equally between partners. For men, satisfaction was higher when their female partners took on a larger share of the mental load. For sexual satisfaction, men were also most content when the mental load was divided evenly.
“I don’t think that means men are consciously thinking ‘I want my partner to do everything,’” Klein told PsyPost of the differing patterns. “I’d be careful about reading it as a conscious preference. But it does show that the same unequal arrangement can have very different consequences for each partner, and it raises the question of whether some traditional arrangements remain comfortable for men even as social norms around equality are shifting.”
Parental mental load presented a different picture. Both mothers and fathers reported higher relationship satisfaction when their partner took on more of the child‑related mental load, and when their partner perceived them as doing more. However, parental mental load did not show a link to sexual satisfaction for either gender, mirroring the findings from the first study.
Geoff MacDonald, a psychology professor at the University of Toronto not involved in the research, told PsyPost the central takeaway is that both partners recognise the domestic gap. “For me, it’s that both men and women agree that women take on more of the mental load around household tasks, and this can have consequences for women’s well‑being in a relationship,” he said. “Our lab thinks a lot about why women are happier being single than men, and why men desire partnership more than women, and we often discuss this division of household labour. These results are very consistent with the idea that women are right to be concerned about what they’re signing up for.”
MacDonald added that while the finding aligns with expectations, it broadens the empirical picture by highlighting the mental‑load component that has not been as thoroughly explored. “It is consistent with thinking in this area, but provides new data on the mental load part that I haven’t seen before,” he noted.
Looking ahead, Klein emphasised turning abstract ideas of fairness into practical habits. Progress, she said, requires moving beyond simple chore sharing to recognise the ongoing mental effort that underpins running a home.
“The first step is simply making mental load visible,” Klein said. “It happens in someone’s head, has no clear starting or finishing point, and partners often genuinely don’t realise how much of it one person is carrying.”
“So couples shouldn’t only ask, ‘Who does the laundry?’ but also, ‘Who notices that the laundry needs doing, remembers it, knows which clothes need washing and how they should be washed (which clothes can go together, what temperature to use etc.), and makes sure it happens?’” she suggested. “Asking ‘Who noticed the immunization appointment was due?’ or ‘Who remembered what groceries we needed?’ is much more useful than simply saying, ‘We should share things more equally.’ And I think there’s an important difference between dividing tasks and dividing responsibility. If one partner has to remind the other what needs to be done, they’re still carrying part of the mental load.”
The researchers caution that the studies are cross‑sectional, revealing associations rather than proving causation. They also note limited variation at the extremes—no woman reported her partner handled all of the mental load, and no man in the couples study did so either—and that all participants were from the United States or the United Kingdom. Weekly work hours were not tracked, which could influence available time for home management.
On methodological questions, MacDonald raised concerns about what exactly the mental‑load scale captures. “The main concern is the validity of the mental load scale,” he told PsyPost. “There’s a potential argument that perceptions of a partner’s household contributions reflect a broader variable like perceived partner responsiveness, meaning this may measure more than domestic duties alone. It could reflect a larger issue than simply household contributions.”
He suggested analysing factors such as conscientiousness and other domains outside the home to obtain a fuller picture of mental load’s impact on relationship well‑being. “It would be helpful if there was more data on the validity of the measure, particularly discriminant validity that accounts for cross‑domain effects.”
Klein acknowledged that much remains to be understood about mental load across different populations as social norms evolve. While public discussion around domestic labour is shifting, the long‑term empirical picture remains sparse. “What we know robustly, across other studies too, is that women carry the larger share of mental load, especially around childcare and parenting decisions, and that this comes with costs: higher stress, lower life and relationship satisfaction, and potentially negative effects on their careers,” she explained.
She added that the evidence does not yet prove that mental‑load inequality is changing over time, and cautioned that longitudinal data are needed to determine whether shifts in division of this work lead to changes in satisfaction. “We simply don’t yet have enough longitudinal evidence on mental load to say, ‘This generation is different from the previous generation.’”
Future research could follow couples over longer periods and explore how mental load relates to specific sexual experiences to better understand how daily domestic teamwork shapes intimate life. As Klein concluded, the crucial question is not only who cooks or cleans, but who remembers, anticipates, plans, organises and worries about all those things—and how that unseen labour affects women’s relationship happiness.
The study, “Unequal Burdens, Unequal Benefits: Housework, Mental Load, and Gendered Satisfaction in Heterosexual Relationships,” was authored by Verena Klein, Esra Ascigil, Tanja Oschatz, and Rotem Kahalon.
