Mental load in same-sex couples: what they teach us

"In our home, no one was supposed to think of it. So we decided."

In a heterosexual couple, one sentence comes up again and again: "I'm always the one who thinks of everything." It's almost always spoken by the same person — the woman. In same-sex couples, that sentence is far rarer. Not because the mental load is absent there: it exists wherever two people run a home. But because no one was appointed in advance to carry it.

That small detail changes everything. And it makes same-sex couples one of the clearest demonstrations of a simple idea: if the mental load weighed the same in every couple, it would be a biological fate. But it doesn't weigh the same everywhere. So it isn't a fate.

Does the mental load exist in same-sex couples?

Yes — but it's distributed differently. The mental load, that invisible cognitive work of anticipating, planning, remembering and coordinating household life, doesn't depend on the partners' gender: it appears the moment two people share a daily life. What changes is who carries it.

Research is consistent on this: same-sex couples split both housework and the invisible mental work more equally than heterosexual couples. A qualitative study published in *PLOS One* in 2023, based on 16 same-gender couples without children, examined the management of this "cognitive labour" specifically. Its conclusion: these couples divide the load according to each partner's strengths, preferences and needs — not according to an expected role. The researchers describe couples who are "redoing gender": with no inherited script appointing "the one who manages," the split has to be negotiated, and it is.

What the numbers say — and the contrast with heterosexual couples

The mirror is striking. In heterosexual couples, the mental load falls overwhelmingly on women. According to a University of Bath and Melbourne study (December 2024, 3,000 parents, published in the *Journal of Marriage and Family*), mothers carry 71% of the household mental load versus 45% for fathers. In France, the national statistics office (INSEE) measures the same imbalance on the concrete side: women perform 71% of parenting tasks and 64% of domestic tasks.

Among same-sex couples, the available research points instead to more egalitarian views and a markedly more balanced division of domestic work. The absence of a gendered template doesn't erase tension or negotiation — the *PLOS One* study identifies real "barriers to cognitive harmony" — but it removes the autopilot that, in so many heterosexual couples, keeps appointing the same person as the [default parent](/en/blog/default-parent). When no role is imposed, the question "who thinks about this?" needs an explicit answer. And an explicit answer is, in itself, already a rebalancing.

Their "secret" isn't 50/50. It's preference.

We often imagine the most egalitarian couples apply a mathematical, half-and-half split, task by task. That's wrong — and it's the most useful lesson. The *PLOS One* study shows these couples do not aim for a permanent 50/50, but for a division experienced as fair: one steers more during one stretch, the other takes over later, depending on availability and wishes.

The core mechanism, researchers call a "strengths-based" approach: a domain goes to whoever prefers, is better at, or cares about that area. Not "you do half the tasks," but "this domain is yours, entirely." That's exactly the logic of [dividing tasks by domains](/en/blog/share-household-tasks), and it's also the heart of the [Fair Play method](/en/blog/fair-play-method-mental-load): owning a domain means carrying its conception, planning and execution — not just doing it when reminded.

The difference from a heterosexual couple that "helps" is decisive. Helping means staying an executor: someone thinks, someone delegates, someone does. Owning shifts the invisible part too — the anticipation. That's the only thing that truly lightens the mental load, because it's that constant vigilance, not the task itself, that exhausts.

Why it works: nothing is "natural," so everything is negotiable

The real lesson of same-sex couples isn't "they get along better." It's more radical: they prove that how the mental load is shared is a construction, not a nature. Where a heterosexual couple inherits a script ("women see what needs doing," "men lend a hand"), a same-sex couple starts from a blank page. It has no choice but to decide — and what gets decided can be re-decided.

That finding disarms the most common excuse for changing nothing: "that's just how it is, it's instinctive." No. If instinct were in charge, it would rule the same way everywhere. The fact that entire couples work differently proves that heterosexual asymmetry comes from habit and social role — two things that can be undone. It also separates the imbalance from mere bad faith: it's neither a fate nor always a conscious choice, but a fold that can be smoothed out. By contrast, when one partner deliberately opts out, we're closer to [weaponized incompetence](/en/blog/weaponized-incompetence-mental-load) — a different problem that does require a real conversation.

What any couple can take from it: 4 levers

The good news: you can import the same-sex couples' "method" into any couple. It comes down to four moves.

1. Make the load visible before sharing it

You can't redistribute what you can't see. Together, list all the invisible work — anticipating appointments, managing supplies, remembering birthdays, tracking schooling — and look, without blame, at who thinks about it today. This step is almost always missing in heterosexual couples, where the load is assumed to "take care of itself." Our [mental load test](/en/blog/mental-load-test) is a concrete starting point for mapping it.

2. Assign whole domains, not isolated tasks

"Can you handle dinner tonight?" leaves you as the pilot. "The kitchen is your domain — shopping, menus, stock, anticipation included" transfers the load for good. This is the central move of same-sex couples: you own a complete territory, you don't perform one-off favours.

3. Split by preference and skill, not by habit

Ask who prefers or is better at each domain — not who "has always done it." That's where the gendered role dissolves. Sometimes the split surprises you; that's a good sign, it means you've left the script. To open this conversation without it turning into conflict, see our guide on [talking to your partner about the mental load](/en/blog/talk-to-partner-mental-load).

4. Accept that "fair" doesn't mean "identical"

Aim for a split that feels equitable, not perfect day-to-day symmetry. It will shift with life's seasons. What matters is that it's chosen, visible and renegotiable — not silently carried by one person. That's precisely what the mental load has in common with [emotional labour](/en/blog/mental-load-vs-emotional-labor): it isn't settled once and for all, it's steered by two.

What an app like Mental Loadless can do

No app will negotiate your domains for you — that conversation stays yours. But [Mental Loadless](/en) does what comes before it and makes it possible: make visible the load no one is counting. Who owns what. How many domains actually rest on a single head. Where the constant anticipation that shows up on no to-do list is hiding.

That's exactly the starting point same-sex couples reach out of necessity, for lack of an imposed role: see the load clearly, then assign it by choice. Turning a vague feeling ("it's always me") into a clear map, domain by domain, is often the real beginning of rebalancing. And if the load spills well beyond the couple, our guide on [how to reduce your mental load](/en/blog/how-to-reduce-mental-load) gathers the methods that last.

Asymmetry isn't a nature. It's an organisation.

And an organisation can change. Same-sex couples aren't magically more harmonious: they're simply denied the reflex that, elsewhere, keeps appointing the same person. What they do out of necessity, any couple can do by decision — make it visible, assign by preference, renegotiate. You can start this week, with a single domain handed over for good.

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Sources

• [The management of cognitive labour in same-gender couples — PLOS One (2023)](https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0287585)
• [The management of cognitive labour in same-gender couples — PMC version](https://pmc.ncbi.nlm.nih.gov/articles/PMC10343096/)
• [The Conversation — *We asked same-gender couples how they share the 'mental load' at home* (2023)](https://theconversation.com/we-asked-same-gender-couples-how-they-share-the-mental-load-at-home-the-results-might-surprise-you-208667)
• [University of Bath & University of Melbourne — *Mothers bear the brunt of the 'mental load'* (12/2024, 3,000 parents, Journal of Marriage & Family)](https://www.bath.ac.uk/announcements/mothers-bear-the-brunt-of-the-mental-load-managing-7-in-10-household-tasks/)
• [INSEE — *Emploi du temps* survey (division of domestic and parenting tasks)](https://www.insee.fr/fr/statistiques/)