Persuasion & consumer psychology · law 058
Endowment Effect
By Shivam Bhandari · Reviewed 31 October 2026 · How we write
what it means
People value things more simply because they own them.
How Endowment Effect works
Once something feels like ‘mine’, giving it up feels like a loss. That is why trials, test drives, and money-back guarantees are so effective.
Ownership can be psychological: customising a product or using it for a while creates the same effect.
where it comes from
Named by economist Richard Thaler in 1980. Daniel Kahneman, Jack Knetsch, and Thaler's 1990 experiments showed people given a coffee mug demanded about twice as much to sell it as others would pay to buy it.
Endowment Effect examples in business
Test drives
Car dealers encourage long test drives so buyers start to feel ownership.
Free trials
A software trial that lets users import their own data makes leaving feel like losing something.
Home trials
Furniture and eyewear brands offer home trials because few customers send items back.
How to apply it
- 1Let customers experience ownership before paying (trials, samples, demos).
- 2Encourage personalisation early.
- 3Offer easy, genuine returns — few customers use them once they own the item.
- 4Price your own assets realistically; you overvalue what you own too.
common misreading
It also affects you as a seller — you may overvalue your inventory, business, or ideas.
ask yourself
How could a customer start to feel ownership of your product before they buy?
put it into practice
Frequently asked questions
What is Endowment Effect?
People value things more simply because they own them. Once something feels like ‘mine’, giving it up feels like a loss. That is why trials, test drives, and money-back guarantees are so effective.
Who came up with Endowment Effect?
Named by economist Richard Thaler in 1980. Daniel Kahneman, Jack Knetsch, and Thaler's 1990 experiments showed people given a coffee mug demanded about twice as much to sell it as others would pay to buy it.
How do you apply Endowment Effect in business?
1. Let customers experience ownership before paying (trials, samples, demos). 2. Encourage personalisation early. 3. Offer easy, genuine returns — few customers use them once they own the item. 4. Price your own assets realistically; you overvalue what you own too.
What is a common misunderstanding of Endowment Effect?
It also affects you as a seller — you may overvalue your inventory, business, or ideas.