Why your best employees are leaving — and how you missed every signal.

Your best people almost never leave on impulse. They leave on a schedule — and that schedule starts about 6 to 9 months before you ever hear the word 'opportunity.' By the time the resignation email lands, you have missed roughly 18 small signals, any one of which you could have acted on if you knew where to look.

I have run post-mortem interviews with hundreds of high-performer departures across four countries. The pattern is brutally consistent. Below is the timeline I now use with every founder I work with, and the questions to ask at each stage before it is too late.

The 6-month timeline of a top performer leaving

Months -9 to -6: the spark goes

Something specific happened. A promotion they expected didn't land. A peer they respected left. A project they cared about got cancelled. They didn't complain publicly. They just started spending 20% of their internal energy somewhere else — usually noticing how much they hate things they used to tolerate.

Months -6 to -3: the search begins (quietly)

They update their LinkedIn — small things, a new headline, a new skill. They start accepting recruiter messages they would have ignored. They take a Tuesday off and you find out from their calendar later that they were 'visiting family.' Their work is still excellent. Their availability for stretch projects starts to soften with polite excuses.

Months -3 to -1: they have an option

Now there is a specific other job they are considering. Their tone in 1:1s changes — less candor about long-term plans, more questions about short-term clarity. They take more half-days. They stop volunteering opinions in big meetings. They become extremely easy to manage, which is the loudest signal of all and the one almost every manager misreads as 'they're doing great.'

Months -1 to 0: they're already gone

By the time they resign, the decision was made 4–8 weeks ago. The exit interview will be polite, generic, and largely useless. Whatever they tell you was the 'reason' is the post-rationalization of a decision they made when none of you were paying attention.

The 18 signals — organized by what you can actually see

What founders should actually do

• Run a 'stay interview' with every top 10% performer every 6 months. Not a review. A 45-minute conversation about what's making them stay and what would tempt them to leave. Most are willing to tell you.
• Measure manager-to-A-player ratio. Your best people need your best managers — many companies have it inverted because A-players are 'low maintenance.'
• Track the gap between someone's current scope and their stated 18-month ambition. If the gap is widening and no plan is moving, they are leaving.
• Re-recruit them annually. People decide to stay every year whether or not you ask. Give them a reason in writing.

The one question that surfaces the truth

In a private 1:1, ask any top performer: 'Imagine it's a year from now and you have left this company. Walk me through the story of how that decision unfolded.' Then be quiet. The specificity of their answer tells you exactly how far down the path they already are. The ones who can't picture it will laugh. The ones who can will give you a 90-second answer that hits painfully close to a real timeline. Listen to that one.

“Your top performers are not loyal to the company. They are loyal to the version of themselves they are becoming at the company. Stop offering that version and they will leave for somewhere that does — usually six months before you notice.”