Same Supermarket, Two Different Saturdays

The Hidden Work of the Mental Load

Why the weekly shop can feel like an outing for one partner and a full project for the other, what research on cognitive labour shows, and how couples can share the thinking as well as the doing

Saturday, ten o’clock

It is a quiet Saturday morning, and a couple heads out to do the weekly shop together.

For him, it is one of the nicer moments of the week. There is coffee in the car, no rush, and a chance to pick out his favourite yoghurt and a bag of crisps for the football match that evening. He drives, he pushes the trolley, and back home he carries the heavy bags in from the car. By any reasonable measure, he has helped.

For her, the shopping started days ago.

She planned the meals for the coming week, working around the children’s activities, their hobbies and two work schedules. From that plan she made a list. In the supermarket she follows it, goes looking for the crackers her daughter likes and sends a quick message to ask which ones. She notices the washing powder is on offer and tries to picture how much is left in the cupboard at home. Then it hits her that she forgot to check the freezer. How much meat is still in there? The tomatoes look soft, so she makes a mental note to come back on Wednesday, because she needs them for dinner that night.

At home she puts everything away and throws the empty packaging in the bin. The bin is full, so she ties the bag and puts in a fresh one. While she is doing that, she sees the glass recycling is almost full too, and she puts it in the boot so it can go tomorrow.

It is nearly noon. What had she planned for lunch?

She is tired, and the day has barely started. Before the shop she had already tidied the kitchen, emptied the dishwasher, woken her daughter on time and reminded her to take a bottle of water to dance class. On her way past the bathroom she noticed the shower had not been cleaned properly, and quietly added it to the afternoon.

Two people did the same shopping. Only one of them carried it in her head.

Two honest versions of one morning

What strikes me most in this scene is that neither person is lying. He experienced a pleasant outing in which he drove, chose a few things and carried the bags. She experienced a morning of planning, checking, remembering and adjusting, most of which happened silently while they walked the same aisles.

This is the heart of the mental load. It describes the thinking work that keeps a household running: noticing what is needed, planning ahead, remembering, and keeping track of whether things are done. Because it happens in the mind, it is easy to overlook, even for the person standing right beside you.

The four parts of thinking work

Sociologist Allison Daminger gave us one of the clearest ways to understand this. In a study published in the American Sociological Review in 2019, she interviewed both partners in 35 couples and described cognitive household labour as four kinds of work. First, anticipating what will be needed. Second, identifying the options. Third, deciding between them. And fourth, monitoring whether the result was good enough.

Her findings help explain the supermarket. Women did more of the cognitive work overall, and especially more of the anticipating and monitoring. Decisions, on the other hand, were often made together, with men and women taking part about equally.

So when he chooses between two brands of yoghurt, he is taking part in the deciding stage, the one part of the process that is visible to everyone. The anticipating happened earlier, when she planned meals around a dance class. The monitoring happens afterwards, when she remembers the tomatoes on Wednesday and the glass that needs to go tomorrow. Those stages are invisible, and so it is entirely possible for both partners to feel the work is shared.

What the numbers tell us

Newer research shows how wide the gap can be. In 2025 Ana Catalano Weeks, a political scientist at the University of Bath, published an analysis of a survey of 3,000 parents in the United States in the European Sociological Review. Mothers reported being mainly responsible for 71% of the cognitive household tasks on average. Fathers reported 45%.

Two further findings stand out. The gap in thinking work was about twice the size of the gap in physical chores, which suggests that many households have made more progress in sharing the doing than in sharing the thinking. And satisfaction was very unequal: 66% of fathers were happy with how the mental load was divided, compared with only 42% of mothers.

These are American figures, and the sample was not fully representative, so I read them as a strong indication, and not as a precise measurement for every household. Still, they match what many women describe, and what Daminger heard in her interviews.

Why it is so tiring

The mental load is exhausting for reasons that go beyond the number of tasks. It rarely has an off switch. A woman can be sitting in a meeting, driving to work or lying in bed and still be tracking what the freezer holds, who needs to be where on Thursday and whether the school form went back. The work travels with her, and much of it consists of small interruptions to whatever else she is trying to do.

It also tends to go unacknowledged. A finished task leaves something to see: a clean kitchen, a full fridge. The thinking that made it possible leaves nothing behind. When it goes well, nobody notices. Over the years that adds up to a great deal of effort that never shows up anywhere, in the conversation at home or in her own sense of how hard she is working.

Why “just tell me what to do” falls short

Many partners respond to this with real goodwill. “Just tell me what you need, and I will do it.” The offer is sincere, and it helps with the doing. Yet it leaves her in the role of manager. She still has to anticipate the need, decide what to ask for, explain it and check afterwards whether it happened. The task moves, while the thinking stays exactly where it was.

This is also why conversations about the mental load can feel so frustrating on both sides. He feels he is helping and is being told it is not enough. She feels she is asking for something he does not seem to see. Both are describing their own experience honestly. The problem lies in how the work is structured.

Redesigning the load

Sharing the mental load in a lasting way usually means handing over whole areas, from the first thought to the final check. Instead of carrying the bags, one partner takes on the weekly shop entirely: the meal plan, the list, the freezer check, the Wednesday tomatoes. Instead of driving to dance class when asked, one partner owns everything to do with dance: the schedule, the water bottle, the costume for the show.

A few steps can make this easier to start.

Make the work visible first. For one week, write down every piece of household thinking you do, including the small ones. Many women are surprised by the length of the list, and many partners are too.

Choose a calm moment to talk. The middle of a stressful Saturday is rarely the right time. A planned conversation, with the list on the table, keeps the focus on how the work is organised.

Hand over complete areas, and let them go. Ownership means your partner will sometimes do things differently, or forget something you would have remembered. Stepping in too quickly quietly hands the area back to you.

Review it together after a few weeks. What is working, what feels heavy, and what needs adjusting? Redesign is something you return to.

A closing thought

Next time you find yourself in a supermarket aisle, wondering how much meat is left in the freezer, it may help to notice that this, too, is work. It deserves a name, and it deserves to be shared.

If you would like to have this conversation with your partner, Becoming a Team is a workbook for couples that I wrote for exactly that moment. It helps you put the invisible work on the table together and decide, calmly, who owns what.