Here is a scenario you will recognise immediately. A department is being reorganised. Every team member’s role is changing. The new roles are objectively better: more autonomy, clearer scope, higher impact. Nobody is being made redundant. Salaries remain the same. Management has spent months thinking through the new structure.
And yet everyone fights it. Not a little. Seriously. People who spent years complaining about the vagueness of their role are now fiercely defending exactly that role. Employees who always said they had too little responsibility now refuse to give up the responsibility they never used. Meetings become heavy. The corridors buzz with discontent.
From the outside it looks irrational. But it is not. It is entirely predictable. It has a name.
This is the endowment effect at work.
The endowment effect is the tendency to value things more highly simply because you own them. Economist Richard Thaler described it in 1980: people systematically ask more for something they possess than they would pay to acquire an identical item. At work, it explains resistance during role changes, irrational positions in negotiations, and excessive attachment to one’s own ideas. It is a direct consequence of loss aversion, and the SUE Influence Framework places it squarely in the Comforts category: the familiar feels valuable simply because it is familiar.[1]
What is the endowment effect?
In 1980, Richard Thaler published a paper that punctured the idea of the rational economic agent. His hypothesis: ownership changes how people value things, in a way that classical economics could not explain.
The classic experiment, later refined by Kahneman, Knetsch and Thaler in 1990, is as simple as it is sobering. Participants in an experiment are given a mug. An identical group is given nothing. Both groups are then asked a question: what is the minimum you would accept to give up the mug? And to the other group: what is the maximum you would pay to acquire the mug? Rationally speaking, those numbers should be close together. It is the same mug, after all.
But they are not. Sellers ask, on average, twice as much as buyers are willing to pay. The only variable that has changed is who holds the mug. Ownership itself, the mere fact that something is yours, doubles its perceived value.[2]
This is not an anomaly. It is structural. And it has everything to do with how loss aversion works. Giving up something you own does not feel like a neutral exchange. It feels like a loss. And losses weigh psychologically heavier than gains of equal size. Kahneman describes this as one of the most robust findings in behavioural economics.
What Thaler and Kahneman observed in the laboratory plays out every day in offices, meeting rooms and restructuring processes. We just do not call it the “mug experiment” there. We call it resistance, difficult negotiations, or a team that simply will not get on board.
The endowment effect operates on three dimensions in the workplace:
Ownership of roles. People become attached to their job title, their set of responsibilities, their place in the hierarchy. When that changes, it feels like losing something that was theirs, not like gaining something new.
Ownership of ideas. Once someone has conceived and developed an idea, that idea feels like a possession. It is not just a proposal. It is their proposal. Criticism of the idea lands as criticism of the person.
Ownership of processes. The way we do things here is not merely habit. It feels like something that belongs to us. A new way of working is not just different. It is an intrusion on what was ours.
You don’t value it because it’s good. You value it because it’s yours.
Three scenarios where the endowment effect does the most damage
Scenario 1: Negotiations where the price never quite adds up
An account manager is negotiating a contract. His proposal is carefully constructed, internally aligned, and he has spent weeks refining it. The client wants adjustments. Nothing dramatic. A shorter term, a lower entry price, a little more flexibility on scope.
Objectively, the requests are reasonable. But the account manager experiences them as attacks on his proposal. He becomes defensive. He finds himself defending elements he himself had considered negotiable just a week earlier. The deal falls apart over details that, in the grand scheme, did not matter.
This pattern appears in virtually every professional negotiation. Sellers and service providers systematically overestimate the value of what they are offering, purely because it is theirs. They ask more than the market justifies. They concede less than is rationally sensible. And they interpret concession requests as unreasonable, even though those same concessions would seem perfectly fair if they were sitting on the other side of the table.
The endowment effect does not just make negotiations inefficient. It makes them more emotional than they need to be. The solution begins with understanding what is happening, but it does not end there. The structural intervention is to separate the person who creates the proposal from the person who defends it. When two different people build and present an offer, the presenter has less ownership. The price being defended is less of theirs to defend.
Scenario 2: The IKEA effect in innovation
A product team has spent six months working on a new feature. Halfway through, a junior team member presents an alternative approach that is simpler, faster to build, and better aligned with what users actually say they need. The data supports the alternative.
But the team does not pursue it. The original plan wins. Not on the strength of arguments. On the strength of ownership. The original plan is ours. We have poured blood, sweat and strategic sessions into it. The alternative, however strong, feels like giving up something that belongs to us.
This is the IKEA effect: the tendency to value products and ideas you have created yourself more highly than identical ones made by others. It was described by Michael Norton, Daniel Mochon and Dan Ariely, and it is a specific variant of the endowment effect in which ownership arises not only from possession but from the effort of creation itself.
In the workplace, this is the quiet killer of innovation. Not a shortage of ideas, but an excessive attachment to the ideas of those with the most ownership claims. The best ideas do not win. The ideas of the people with the most power to claim ownership win.
The structural solution is to separate creator from evaluator. Whoever conceived an idea does not evaluate it. Whoever wrote a proposal does not sit at the table when it is being weighed. This is not a sign of distrust. It is designing an environment that works better than our biases allow us to.
Scenario 3: The desk war during an office move
The organisation moves to a new office. The new space is nicer, brighter, better connected, and has more meeting rooms. Management has spent months on the layout. And yet unrest breaks out. Not over the big questions. Over the desks.
Who sits where? Why is department X on the ground floor when they were always upstairs? This desk is smaller than my old one. I want to sit next to my current teammates, not according to the new structure.
From the outside it seems incomprehensible. From the inside it is entirely logical. People have developed feelings of ownership over their spot. My desk is not just a workstation. It is my territory. Giving it up does not feel like a neutral relocation. It feels like a loss.
This is precisely why the most rationally designed office moves collapse under emotional resistance nobody anticipated. It is also why change managers who focus only on the logistics of the move miss its psychology entirely.
The intervention is preventive: ensure people do not develop ownership feelings before the change takes place. Introduce the new office as a shared space where nobody has a fixed spot. Or assign everyone a new place simultaneously, so nobody feels they are losing their spot while someone else gains one.
The endowment effect through the lens of the Influence Framework
When you analyse the endowment effect using the SUE Influence Framework, it immediately becomes clear how much stronger the blocking forces are than the driving ones.
Pains (what pushes people away from current behaviour): people genuinely suffer under unclear roles, slow processes and projects that refuse to move forward. These pains are real. But they are insufficient to override the endowment effect, because they are diffuse and feel distant.
Gains (what pulls people toward new behaviour): a better role, a more efficient process, a more successful project. Also real and measurable. But abstract and future-facing. The mug you don’t yet have is worth less than the mug you already hold.
Comforts (what keeps people in current behaviour): and here lies the core of the endowment effect. The familiar feels safe. It also feels like yours. The current desk, the current role, the current project are not just habitual. They are possessions. And possession confers a sense of security, identity and control that is difficult to quantify but weighs enormously in the moment of decision. This is the dominant force that blocks change.
Anxieties (what stops people from changing): the fear of losing something that is yours is far more concrete than the hope of gaining something better. What if the new role suits me less well? What if my expertise becomes less relevant? What if I lose my position in the informal hierarchy?
This is why rational arguments accomplish so little in restructuring processes. You can explain ten times over that the new role is objectively better. The Comfort of familiar possession and the Anxiety of loss outweigh any slide in any presentation.
Tom de Bruyne explores exactly this mechanism in The Art of Designing Behaviour: the challenge is never that people lack information. The challenge is that the forces keeping them where they are are simply more powerful than the forces pulling them forward. Designing for change means working with those forces, not ignoring them.
Five interventions that work
The endowment effect cannot be reasoned away. But you can design the environment so that it has less room to operate.
1. Trial periods before ownership sets in. The most powerful intervention is temporal: ensure people try something before they own it. “We will work in the new structure for the next three months” is fundamentally different from “we are permanently restructuring.” Ownership feelings develop through repeated exposure. A trial period lets people gain experience without the loss of the old situation already feeling permanent.
2. Rotation systems that structurally limit ownership. When nobody has a fixed spot, a fixed role or a fixed project, the endowment effect has less opportunity to take hold. Hot-desking, rotating project leads and periodically shifting team compositions are not merely logistical choices. They are psychological interventions that prevent ownership feelings from taking deep root.
3. Reverse framing: what you gain, not what you lose. The endowment effect is amplified by the way change is communicated. “You are getting a new role with more impact” activates Gains. “Your current role is changing” activates Comforts and Anxieties. Same change, different frame, different psychological response. This is not spin. It is choosing which side of reality to weight most heavily in your communication.
4. Separate creator from evaluator. In innovation processes and decision-making: whoever created something does not evaluate it. Whoever wrote a proposal is not in the room when it is being assessed. This is not always practical, but where it is possible, it dramatically reduces the evaluator’s sense of ownership over the outcome. The idea is no longer theirs. It is simply an idea.
5. Sunset clauses for processes and projects. Give every process, every working method and every project an end date or review point from the outset. “We will evaluate this in six months” normalises change and prevents a temporary arrangement from becoming a permanent possession. When the ending is agreed in advance, it feels less like loss when it actually arrives.
How the endowment effect connects to other biases
The endowment effect rarely operates in isolation. At work, it amplifies other biases in ways that make change particularly difficult to diagnose and address.
Loss aversion is the engine behind the endowment effect. The fact that losses feel psychologically heavier than gains of equal size is precisely why possession gets overvalued. Understanding this also explains why people react so disproportionately to objectively small changes.
Status quo bias compounds it. People already have a preference for the current state as a default. The endowment effect adds something further: the current state is not just the default, it is mine. That makes resistance to change doubly strong.
Sunk cost fallacy enters as a partner. When you have already invested heavily in a project, role or way of working, giving it up feels like a double loss: you lose the possession and the investment. The endowment effect and the sunk cost fallacy reinforce each other in a downward spiral of irrational holding on.
Confirmation bias closes the loop. Once you regard something as yours, you unconsciously seek information that confirms it is good. You filter for evidence that justifies keeping your possession and ignore evidence that suggests letting it go.
Frequently asked questions
What exactly is the endowment effect?
The endowment effect is the tendency to value something more highly simply because you own it. Richard Thaler demonstrated in 1980 that people asked significantly more to sell a mug they had been given than they were willing to pay to buy an identical mug. Ownership changes subjective value, not objective value.
How does the endowment effect show up at work?
In three main ways. First, in negotiations: sellers systematically overestimate the value of what they are offering. Second, in innovation: people defend their own ideas and projects disproportionately, even when better alternatives exist. Third, during change: employees resist giving up their role, desk or way of working, even when the new situation is objectively better.
What is the difference between the endowment effect and loss aversion?
Loss aversion is the broader principle: losses feel more painful than equivalent gains feel good. The endowment effect is a specific consequence of loss aversion. Because giving up something you own feels like a loss, you overvalue that possession. You overvalue the mug because parting with it feels like losing something, not like a neutral exchange.
Can you prevent the endowment effect during a reorganisation?
You cannot eliminate it entirely, but you can significantly reduce it. The key is preventing ownership from forming before the change takes place. You do this with trial periods instead of immediate permanent assignments, rotation systems that structurally limit the development of ownership feelings, and by framing change as something people gain rather than something they lose.
What is the IKEA effect and how does it relate to the endowment effect?
The IKEA effect is the tendency to value products you have made yourself more highly than identical products made by others. It is a variant of the endowment effect in which not only ownership but also self-made effort inflates perceived value. At work, this means people systematically overvalue their own projects and ideas simply because they worked on them.
Conclusion
Want to learn how to structurally address behavioural barriers like the endowment effect in your organisation? In the Behavioural Design Fundamentals Course you learn to apply the Influence Framework and the SWAC Tool to diagnose biases and design environments that work better. Rated 9.7 out of 10 by 5,000+ alumni from 45 countries.
PS
The endowment effect may be the most underestimated force in organisations. We invest enormously in the rational case for change, and almost nothing in the psychology of possession that neutralises that case. At SUE, our mission is to use the superpower of behavioural psychology to help people make better choices, for themselves and for the organisations they are part of. The first step is accepting that the value we assign to things is never purely objective. It is always also a function of who we are, what we have built, and what we fear losing.
