The IKEA effect
The IKEA effect is the tendency to place disproportionately high value on things we partly made ourselves. The labour we put in inflates our sense of worth — a wobbly self-assembled shelf can feel more valuable than a sturdier store-bought one.
Why does the IKEA effect happen?
Effort creates attachment and signals competence, and we justify the work by valuing its result. Our own contribution looms large in how we appraise the outcome.
The market prices the result; you price the result plus your labour, and the gap feels like injustice.
What does the IKEA effect look like in real life?
- Valuing self-built furniture, gardens, or code above objectively better alternatives.
- Founders overvaluing their own product or startup.
- Cake mixes selling better when they require adding a real egg — a little effort creates ownership.
How do you counter the IKEA effect?
- Separate the value of your effort from the value of the result.
- Get an outsider’s appraisal, free of your sweat-equity.
- Ask whether you’d pay the same price if someone else had made it.
The deeper point
It’s why feedback on your own work is so hard to hear: the effort that built it is invisible to everyone else but enormous to you. The market prices the result; you price the result plus your labour, and the gap feels like injustice.
Frequently asked
- What is the IKEA effect?
- The tendency to overvalue things you partly made yourself — the effort you invested inflates your sense of the result’s worth, regardless of its objective quality.
- What’s an example of the IKEA effect?
- Cake mixes sold better once they required adding a real egg: the small effort created ownership, making bakers value the result more.
- How does the IKEA effect mislead founders?
- It inflates how they value their own product or startup, making honest outside feedback hard to accept because the invisible effort feels like part of the worth.
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Go deeper
The book behind this idea: Predictably Irrational by Dan Ariely. Hear the whole thing free — start an Audible trial and your first audiobook is on the house.
Read the full summary of Predictably Irrational →
More canonical picks:
- Thinking, Fast and Slow — Daniel Kahneman
- The Art of Thinking Clearly — Rolf Dobelli
- The Great Mental Models, Volume 1 — Shane Parrish
- Poor Charlie’s Almanack — Charlie Munger
- Super Thinking — Gabriel Weinberg & Lauren McCann
- Seeking Wisdom — Peter Bevelin
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Cite this page
ReadGlobe. (2026). The IKEA effect. https://readglobe.com/bias/ikea-effect/
"The IKEA effect." ReadGlobe, 29 May 2026, readglobe.com/bias/ikea-effect/.
Primary source: Wikipedia
Editorial synthesis © ReadGlobe 2026, drawing on Kahneman’s Thinking, Fast and Slow, the Tversky–Kahneman research program, and the primary cognitive-science literature. · Last reviewed 2026-05-29.