Endowment Effect
People value things more once they feel they own them — including progress, content and customizations inside an app.
See it in action
The same screen without and with Endowment Effect. Watch both sides play out, then compare the outcome.
A list of abstract features asks people to value something they've never had.
Seeing their own notes and boards, people value keeping them far more than gaining features.
What to watch: the same price — but on the right, it's protecting something people already own.
Let people build something during the trial and show it back to them at the decision point.
Hold people's own data hostage or make exporting it hard.
Key takeaways
- Let users create or personalize something early.
- Free trials with full access build a sense of ownership.
- Make what users have built visible, so leaving feels like giving it up.
Quick facts
- Also known as
- —
- Described by
- Richard Thaler
- Year
- 1980
- Category
- Motivation & emotion
- Related laws
- IKEA Effect, Loss Aversion, Goal-Gradient Effect
Endowment Effect explained
The endowment effect describes how people value things more once they own them. The same object feels more valuable to the person who has it than to someone considering acquiring it.
Ownership can be psychological as well as legal. When users customise a product, store their data in it or use it during a trial, they start to feel that it is theirs.
Products use this by letting users experience ownership early, through free trials, personalisation and saved work.
Where it comes from
Coined by economist Richard Thaler in 1980. In a well-known 1990 study by Daniel Kahneman, Jack Knetsch and Thaler, people given a coffee mug asked roughly twice as much to sell it as others were willing to pay to buy it.
How it shows up in apps
Playlists, saved workouts, custom avatars and personalized feeds create ownership that strongly supports retention.
Endowment Effect examples
A music app asks new users to pick three favorite artists and immediately builds 'Your Mix' — something they already feel is theirs.
Free trials with full access
Software trials that give full access let users build workflows and data, making the product feel like theirs and increasing the motivation to keep it.
Personalised setups
Apps that let users choose themes, avatars or preferences early create a sense of ownership that encourages continued use.
Saved carts and wishlists
Items added to a cart feel partly owned, which is why reminders about saved items can prompt purchase.
How to apply Endowment Effect
- Let users experience and customise the product before asking them to pay.
- Encourage users to add their own content and data early.
- Use language that reinforces ownership, such as 'your workspace'.
- Make it easy to keep what users have created.
- Respect users' data: allow export, so ownership feels real and fair.
Want Endowment Effect checked in your own product? Our retention & churn audit evaluates it alongside the other principles that shape how users decide, onboard and stay.
Common mistakes
- Locking users' own data behind paywalls after a trial.
- Creating fake ownership through misleading language.
- Making it hard to export data, which damages trust.
How to measure it
Compare conversion and retention for users who customised the product or created content against those who did not. Test trial formats and personalisation steps to see their effect on paid conversion.
Frequently asked questions
What is Endowment Effect?
People value things more once they feel they own them — including progress, content and customizations inside an app.
Where does Endowment Effect come from?
Coined by economist Richard Thaler in 1980. In a well-known 1990 study by Daniel Kahneman, Jack Knetsch and Thaler, people given a coffee mug asked roughly twice as much to sell it as others were willing to pay to buy it.
How does Endowment Effect apply to app design?
Playlists, saved workouts, custom avatars and personalized feeds create ownership that strongly supports retention.
Who discovered the endowment effect?
Economist Richard Thaler named the endowment effect in 1980, and Kahneman, Knetsch and Thaler demonstrated it in a famous 1990 study using coffee mugs.
How do free trials use the endowment effect?
By giving users temporary ownership of features and data, trials make giving them up feel like a loss, which encourages upgrading.
How do you measure Endowment Effect in a product?
Compare conversion and retention for users who customised the product or created content against those who did not. Test trial formats and personalisation steps to see their effect on paid conversion.
Sources
- Thaler, R. (1980). Toward a positive theory of consumer choice. Journal of Economic Behavior & Organization, 1(1). Find on Google Scholar ↗
- Kahneman, D., Knetsch, J. L. & Thaler, R. H. (1990). Experimental tests of the endowment effect and the Coase theorem. Journal of Political Economy, 98(6). Find on Google Scholar ↗
Related laws
Motivation & emotionIKEA Effect
People place disproportionately high value on things they helped create, even when the result isn't perfect.
Decision-makingLoss Aversion
Losses feel more powerful than equivalent gains — in many studies roughly twice as strong — so people work harder to avoid losing something than to gain it.
Motivation & emotionGoal-Gradient Effect
People speed up their effort as they get closer to a goal, so visible progress — even artificial head starts — increases completion.
Endowment Effect in practice
- Making moneyApp monetization strategies that don't annoy users — designed with behavioural scienceMonetize your app without wrecking retention: value-first paywalls, honest trials, rewarded ads, anchoring and decoy pricing done ethically, and what to avoid.
- App marketing & ASOHow to reduce app uninstalls: the eight reasons users delete apps, and the fixesWhy users uninstall apps — storage, no value, notifications, ads, crashes, battery, permissions, friction — and practical fixes, especially for India.
- App marketing & ASOApp retention rate benchmarks by category — and how to read your own numbersApp retention rate benchmarks by category — day 1, day 7 and day 30 ranges compiled from public industry roundups — plus how to measure and improve your own.
- Making moneyThe business model of Duolingo, Spotify and Tinder — three freemium playbooksThe business model of Duolingo, Spotify and Tinder: how each turns free users into payers, with Q2 2026 numbers, pricing tactics and lessons for your own app.
- UI/UX designOnboarding screen examples: 40 patterns that get users to value faster40 app onboarding examples and patterns — welcome, sign-up, personalisation, permissions, empty states and first success — and why each works.
- Career guidesHow to get a behavioral design job in 2027: applying behavioural science to products ethically — friction, defaults, motivation and testingHow to get a behavioral design job in 2027: behavioural science for products, friction, defaults, motivation, ethics, dark pattern rules and testing.
Certifications that test it
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