The 90 Percent Rule
Score every option on importance and keep only what hits 90 or above
- Difficulty
- Easy
- Time to result
- ~weeks to results
- Steps
- 5
- Confidence
- 90%
The 90 Percent Rule turns vague prioritization into a single numeric filter. You imagine every option, opportunity, or commitment plotted on an importance continuum from zero (totally unimportant) to one hundred (absolutely essential). Then you apply a deliberately extreme cutoff: anything scoring below 90 percent you question and probably eliminate, and anything below 10 percent you cut without ceremony. The high bar exists because a 'pretty good' 60-percent yes is not free; it silently trades away time that belonged to a 90-percent priority. By forcing a score and refusing the middle, you convert a fog of good-enough options into a short list of vitally important ones, freeing capacity to go further and faster on what actually matters.
Origin
Greg McKeown developed the rule while advising Silicon Valley executives who, after early focused success, fell into the undisciplined pursuit of more. It became a centerpiece of his book Essentialism as a practical antidote to the trade-off blindness he saw everywhere.
Core principles
- 01Every option can be plotted on a 0-100 importance continuum
- 02A 'good' opportunity at 40% still steals from a vital 90% one
- 03Saying yes to the mediocre is an invisible trade-off against the essential
- 04The joy lives in the 90%-and-above, not in the scattered rest
- 05Selectivity is a discipline, not a personality trait
How to run it
- 1
Plot the option on the continuum
Take the specific commitment in front of you and place it on a mental scale from 0 (unimportant) to 100 (completely essential).
Pro tip Rate importance to your own mission, not how impressive it looks to others.
- 2
Apply the 90 percent cutoff
If the option does not clear 90 percent, flag it for questioning and likely elimination. Resist the urge to keep a 60 or 70 just because it is 'good'.
Watch out Refusing the middle feels wasteful at first; that discomfort is the rule working.
- 3
Name the hidden trade-off
For every sub-90 yes, ask what 90-plus priority it would take time and attention away from. Make the invisible cost visible.
- 4
Eliminate the bottom decile
Anything sitting below 10 percent importance gets cut outright, no further deliberation required.
Pro tip Batch this: sweep your calendar and commitments and delete the obvious sub-10s in one pass.
- 5
Reinvest the freed capacity
Pour the reclaimed time into the confirmed 90-plus items so you make a hundred units of progress on one thing instead of one unit across a hundred.
In the wild
A woman McKeown met wore her exhaustion as a badge, proud of four hours of sleep across two weeks. Weeks later she returned having stripped away how she worked, slept properly, and made prioritized decisions about what she actually wanted to pursue. Applying a high importance bar rather than accepting every demand, her stress fell and her productivity rose.
→ Lower stress, higher output, and a clear sense of what was worth her time.
McKeown describes an evening making s'mores over a fire with his wife and children. On the importance continuum that experience sat well above 90 percent for him, so it was an easy, joyful yes, unlike aimlessly scanning social media in another room, which would have scored low and been eliminated.
→ Time spent on a top-tier priority that felt free and playful rather than rigid.
Common mistakes
Treating 'good' as good enough
A 40-percent option feels harmless because it is genuinely fine; the error is not seeing that it quietly steals from a vital 90-percent priority.
Softening the bar to 70 or 80
The rule only works because 90 is deliberately extreme. Lowering the cutoff lets the trivial many flood back in.
Mistaking rigor for a joyless life
If a priority feels violated, the list is wrong, not the method; done right the 90-plus items are the most liberating, joyful ones.
Is it for you?
Best for
Anyone chronically overcommitted who needs a hard filter to decline good-but-not-great options.
Not ideal for
Low-stakes, reversible daily choices where deliberation costs more than the decision is worth.
From the transcript
“anything that is underneath 90 percent anything that's lower than 90 percent important you question and maybe even eliminate you're looking for just the things…”
“every time you do something that's below 90 percent you're taking it away from something that is 90 percent robust you're making a trade-off”
From the episode
Essentialism Explained: How To Focus On What Matters In Life - Greg McKeown - #175
Greg McKeown