Switching between roles costs real time and energy, and the cost is worst on complex, judgment-heavy work. That finding is decades old and still stands; no study has measured it for freelancers specifically. Sophia Herrmann, a psychologist and freelance consultant, offers a practical 2x2 for it: sort each switch by how similar the two roles feel in your head and by how strictly your life keeps them apart. Two of the four fields need boundaries, one needs you to tear boundaries down, one needs a five-minute routine. Plan your week from that map instead of from a to-do list.
Most freelancers treat a chaotic week as a time management problem. It usually is not. The real cost sits in the switches: client A to client B, project work to bookkeeping, laptop to family dinner. The research on that cost is old, robust and rarely applied to solo work. This article puts it next to a framework a freelancer built for exactly that.
The cost of switching is real, and it is not new
The American Psychological Association's summary of the task-switching literature quotes psychologist David Meyer's estimate that "even brief mental blocks created by shifting between tasks can cost as much as 40 percent of someone's productive time." The experiments behind it, by Rubinstein, Meyer and Evans, were published in 2001 in the Journal of Experimental Psychology. Participants lost time on every switch, and lost more when the tasks were complex or unfamiliar. Work by Rogers and Monsell from the mid-1990s adds that the cost does not disappear when a switch is completely predictable, only shrinks with preparation time.
Two honest caveats. These are 2001 and 1990s findings, not a 2026 statistic, and the 40 percent is an upper-end estimate. And nobody has measured switching costs for freelancers juggling several clients; the research was done with students and office tasks. What carries over is the shape of the finding: the penalty grows with complexity, and complexity is what most freelancers sell.
Herrmann's 2x2: two questions per switch
Sophia Herrmann finished her psychology degree in 2022, went straight into IT project work, and noticed that good to-do lists did not save her. "Time management is not necessarily our biggest problem. It is all these context switches, they are somehow the hard part," she told the Freelance Unlocked audience (translated). Her framework is a practitioner's tool, not an academic model, and she says so on stage. It asks two questions about every switch.
How similar do the two roles feel in your head? Your project self across five clients probably runs on the same skills, the same tone, the same goals. Your project self and your bookkeeping self are, in her words, very different types. Similar roles switch cheaply but blur; distant roles hold focus well but are expensive to enter.
"When roles are very close together, a switch between them feels relatively easy. At the same time the brain then finds it a bit harder, once it is in a role, to hold the focus." (Sophia Herrmann, translated)
How strictly does your life keep them apart? Different place, different people, different hours count as separated. Same desk, same to-do list, same afternoon count as not separated.
Put the two together and you get four fields, each with its own move.
- Distant roles, life separates them. Herrmann's example: freelancing by day, psychology lectures by night, kilometres apart. Go with the flow. Your brain does the work. Only make sure nothing you need transfers gets lost on the way.
- Distant roles, life does not separate them. Bookkeeping planned into the same day, on the same to-do sheet, at the same desk as client work. This is where a client message during an invoice run wipes your focus. Build boundaries: "Try to build something into your life that gives your brain the trigger directly: hey, you are in a different role right now," she says (translated). Kitchen table instead of desk, a time slot no client can interrupt, a separate browser with everything else closed.
- Similar roles, life separates them. Five clients you handle the same way, but one insists you only work for them on Mondays and Tuesdays. The cheap switch you could exploit is blocked, so you end up doing next week's work now. Her advice is the opposite of the usual: tear strict boundaries down. Pick projects that allow the same place, similar hours and one shared task list, then prioritise across clients by what matters most.
- Similar roles, life does not separate them. Freelancer self and private self, both at home, both in the same head. Focus is what leaks. Here you need routines, not walls.
Routines are mini role switches
For that last field Herrmann calls routines "mini role-switch scenarios" for the brain: a short script that says the goals have changed. Two of hers are worth stealing. After every client meeting, write down the three things you take from it and give yourself permission to leave the rest. Three minutes before the next one, write down the three things you want to achieve there. And at the end of the working day, five minutes: the three things you are leaving unfinished, the explicit decision to leave them, the three things you want to pick up in your private life.
She is clear about the limit. "Even when we design the role switch well, it still costs some energy. I would not recommend that any of you switch back and forth between 20 different topics" (translated). The framework reduces the price of a switch; it does not make switching free.
What the boundary research adds
Herrmann's "build boundaries" and "tear boundaries down" fields match the freshest peer-reviewed work on the topic. Silvana Weiss and Renate Ortlieb interviewed 26 academics at an Austrian university for a study published in October 2024 in the German Journal of Human Resource Management. Two findings travel. First, segmentation, keeping work and life apart, needs deliberate tactics: time blocks, devices out of reach, planned "free" times and spaces. Integration, letting work bleed into everything, happens on its own through immersion and constant availability. Second, the two are not opposite ends of one scale. People use segmentation to protect periods of intense integration, and intense work phases to earn clear boundaries afterwards.
The extrapolation caveat: these were employed academics, not freelancers, and the study is qualitative. But the mechanism is the one every solo worker knows. Blurring is the default. Separation is a skill, and it is learnable.
The residue nobody plans for
There is one more reason a switch costs more than the minutes it takes. Sophie Vaessen, a breathwork coach who spoke at the same event, separates the trigger from the reaction:
"That is not the stress, that is the stressor. Stress is what happens in the body. When we deal with the stressor, when the train finally arrives, the stress is very possibly not gone, it is still in the body, because we did nothing with it." (Sophie Vaessen, translated)
Herrmann describes the same thing from the cognitive side: part of a switch is turning down the emotions of the role you are leaving, and a bad client call follows you into the evening. So a routine that marks the switch physically, a walk, loud music in the kitchen, a few slow breaths, is not decoration. It closes the loop the previous role left open.
Design your week from the matrix
- List your roles for one week. Not tasks, roles: client A, client B, bookkeeping, sales, parent, partner, learner.
- For each switch you make more than once a week, answer the two questions and place it in a field.
- Assign the move. Boundaries for distant roles that share a desk. Fewer walls for similar roles that a client's rules keep apart. A five-minute routine for the blur between work self and private self.
- Write one if-then sentence per move. Herrmann recommends implementation intentions, the "if situation X, then I do Y" format that Gollwitzer and Sheeran's 2006 meta-analysis established as one of the best-evidenced habit tools in psychology. Old research, still standing. Example: "If my 16:30 timer rings, I write down the three things I am leaving and close the laptop."
- Cap the number of distant-role switches per day. If bookkeeping and client work both need to happen, give them different half-days rather than alternating hours.
For the recovery side of this, read why switching off fails for freelancers, which uses the same two sessions. For the practical wall-building, how to set boundaries and get more done is the companion piece, and stop starting, start finishing covers the prioritisation you need once the switches are under control.
What to do on Monday
- Count your switches for one day. Every change of client, role or context is a tally mark. Most people are surprised.
- Move one distant-role task, most likely bookkeeping, to a different place and a protected hour this week.
- After each client call, write three takeaways and leave the rest. Three minutes before the next, write three goals.
- Set a timer 20 minutes before your hard stop and run Herrmann's five-minute end-of-day routine.
- Write one if-then sentence for the switch that hurts most and stick it to your screen.
Fewer, cleaner switches also show up in how you sell: clients notice a freelancer who arrives fully in the room. A free 9am profile puts that freelancer in front of companies across DACH.
Freelance Unlocked is co-organized by 9am together with Uplink and freelancermap. This article draws on the sessions of Sophia Herrmann and Sophie Vaessen at Freelance Unlocked 2026. Watch the full talk above, and join us at the next edition: freelanceunlocked.com.
