Losses hurt about twice as much. Roughly.
People weigh losses roughly twice as heavily as equal gains, so show users what they’d really give up.
Loss aversion is a greatest hit of behavioral economics and a core part of Kahneman and Tversky’s prospect theory from 1979. You’ve probably heard that losses weigh 2.25 times as much as gains. That number traces back to a 1992 study of just 25 graduate students making unpaid choices between gambles. Not exactly a law of nature.
A 2024 meta-analysis in the Journal of Economic Literature pooled 607 estimates from 150 articles and landed on an average of about 1.96. Adjusting for likely publication bias pulled it down to around 1.74, and individual estimates are widely spread. So the effect looks real, but “about twice, give or take” is the honest version.
In your product, that suggests showing what a user would give up, not just what they could gain. A trial-ending email that names the 14 reports someone built speaks louder than “upgrade for more features.” Test it against your current email. And keep it true: no fake countdowns, no invented scarcity. Real losses only.
The example
- Instead of
- “Your trial ends Friday. Upgrade to unlock more features!”
- Try
- “Your trial ends Friday. Upgrade to keep your 14 dashboards and 3 client reports live.”
Before you flush
Rewrite your trial-ending email so it names the specific work the user created that they’d lose access to. Keep every detail true.