Have you ever noticed a specific pattern?
In your twenties, what you regret are mostly actions taken. Saying the wrong thing, dating the wrong person, quitting a job impulsively.
But as you cross into your forties, the trajectory of your regret quietly shifts. You begin to regret inactions. Not taking that trip, not learning that craft, not speaking up when you had the chance, not testing out that crazy idea when you were young.
This is not an isolated, subjective feeling. There is a formula to it.
Cornell University psychologist Thomas Gilovich has spent thirty years studying regret.
He conducted a large-scale study, asking people across different age demographics about their greatest regrets. He then categorized the responses into two buckets: “action regrets” (regretting something you did) and “inaction regrets” (regretting something you left undone).
The results were unequivocal:
In the short term, people regret actions. In the long term, people regret inactions.
Furthermore, this ratio shifts predictably with age. For young adults, action regrets and inaction regrets are split roughly 50/50. As people enter middle age, the proportion of inaction regrets rises sharply, eventually accounting for over 75% of all regrets.
Gilovich identified the psychological mechanism driving this shift.
When you make a mistake through action, your brain automatically initiates a “repair program.” You rationalize (“it was the best choice given the circumstances”), you extract lessons (“at least I know this path is a dead end”), and you eventually accept it (“what’s done is done”).
But for inactions, the brain has nothing to repair.
Because it never occurred. You have no data on what would have happened—it remains permanently in a state of “what if.” And “what if” is a simulation with no expiration date.
Twenty years later, the loop continues to run: What if I had moved to that city? What if I had spoken up? What if I had taken that risk?
Errors of action shrink over time. Errors of inaction compound over time.
That is the formula of regret.
Gilovich’s research revealed an even more stark detail.
What triggers the deepest inaction regret? It is not the pipe dreams—it is the things you “almost did.”
You hesitated, you deliberated, you were even fully prepared—but you backed out at the last second.
This “almost” regret is the most persistent. Why? Because you know the window of opportunity was real. It wasn’t a lack of options; it was a failure to execute.
How does this finding apply to your current decision-making?
The application is straightforward. The next time you are hesitating on a decision, run a “Regret Forecast.”
Instead of asking, “Will I regret doing this?” ask, “Ten years from now, will I regret the action, or the inaction?”
If the decision is reversible—trying a new role, learning a new skill, traveling to a new place—the actual risk of action is low. If it fails, you can course-correct.
But if you choose inaction, ten years from now it devolves into an unverifiable “what if.”
This is not a license for impulsivity.
Gilovich himself emphasizes that some inactions are entirely rational. Not all hesitation is meant to be broken.
But you must distinguish between two types of “inaction”: an active abandonment based on rigorous evaluation, versus avoidance driven by fear.
You will rarely regret the former, because it was a conscious decision. You will almost certainly regret the latter, because it was an evasion of a decision.
Before you face your next “almost did it” moment, filter it through these questions:
🛠️ The 3-Question Regret Forecast
| Question | Your Answer |
|---|---|
| ① Ten years from now, will I regret the action or the inaction more? | If “inaction” → Take this opportunity seriously. |
| ② Is this decision reversible? | If yes → Course-correction is possible; the true risk is lower than imagined. |
| ③ Am I making a rational choice to pass, or using “let me think about it” to avoid the decision? | If avoiding → This bullet remains in the chamber. |
Application: You do not need absolute certainty on all three questions. Answering Question ③ with brutal honesty is usually sufficient.
Is there an “almost did it” scenario playing in your mind right now?
Something you debated for months, prepared for, yet ultimately backed away from.
Gilovich’s data is definitive: It will not shrink. The more time passes, the larger it compounds.
Now may not be the optimal time.
But it is likely the moment where your cost of regret is at its absolute lowest.
Because looking back a decade from now, you will rarely say, “I regret taking the shot.” You will only say, “I regret that I didn’t.”
【 Insight 】— Decision-making is a trainable skill.
