The Exit Interview You’ll Probably Never Get

Good people rarely leave on the day they resign.

They leave months earlier, quietly, when nobody is paying attention.

◆   A better opportunity

Tom hands in his notice on a Thursday afternoon. His manager is genuinely shocked, because Tom is one of the good ones. He’s dependable, he’s liked, he’s the person new starters get sent to when they’re stuck, and only last month someone said in a meeting that he’d make a great team leader one day.

The exit interview is polite and short. HR asks why he’s leaving and Tom says it’s a better opportunity, a bit more money and a chance to step up. HR ticks the box marked career progression, wishes him well and files the form. Everyone agrees it’s a shame, and within a few weeks the job is out to an agency.

What the form doesn’t capture is that Tom didn’t really leave on that Thursday. He left about eighteen months earlier, on the day a team leader role came up and went to someone from outside. Nobody asked him whether he was interested. He didn’t push himself forward, because he assumed that if they’d wanted him they’d have said so. From that point on he did his job perfectly well, but he stopped volunteering ideas, stopped staying late to help, and started quietly taking calls from recruiters.

That’s the exit interview you’ll never get. Not the polite version on the day they leave, but the honest one they’d have given you a year and a half earlier, if only someone had thought to ask.

◆   Leaving before they leave

Most businesses measure turnover by counting the people who walk out of the door. The far bigger problem is the people who have already gone in their heads but are still sitting at their desks.

The numbers on this in the UK are stark. Gallup’s latest figures put the share of UK employees who are genuinely engaged at work at just 10 per cent, with 83 per cent not engaged and a further 7 per cent actively disengaged. Not every one of those people is a hidden diamond who has been overlooked, of course. But somewhere inside that large middle group are the Toms, people who were once full of ideas and energy and who have quietly decided that nobody is going to notice either.

The cost shows up twice. First, you lose the discretionary effort, the extra idea, the problem fixed before anyone else spotted it, the new starter looked after without being asked. That never appears on a spreadsheet, which is exactly why it’s so easy to lose. Then, eventually, you lose the person too, and as the first paper in this series set out, replacing someone is far more expensive than most leaders assume once you count the months it takes a newcomer to get up to speed.

The frustrating thing is that the warning signs are usually there. People rarely go from committed to gone overnight. They go quiet first, and
quiet is very easy to mistake for content.

◆   The signs you’ll only see if you’re looking

The good news is that people who are quietly leaving tend to give themselves away, if anyone is paying attention. The signs are small, which is why they’re so easy to miss in a busy week.

The ideas stop coming. Someone who used to suggest improvements in every team meeting goes quiet, not because they’ve run out of ideas but because they’ve stopped believing anyone will act on them. The extra effort disappears too. They still do their job well, often very well, but they no longer stay ten minutes late to help a colleague or pick up the thing nobody else wanted to do.

They stop asking about the future. People who see a path ask about it, about training, about the next role, about what the business is planning. When those questions dry up, it’s often because they’ve started asking them somewhere else. And sometimes the clue is simply a change in how they talk, from we to they, as in what they’ve decided, or what they want us to do now.

None of these signs on their own means someone is about to resign. But if you notice two or three of them in one of your best people, it’s worth having a conversation this week rather than waiting for the annual review.

◆   After the deal

There’s one moment when hidden diamonds are more at risk than any other, and that’s in the months after a business changes hands.
I’ve built and sold two businesses, the second to a private equity backed group, so I’ve seen this from the seller’s side of the table. In a founder-led business, the person at the top usually knows exactly who the quiet stars are. They know who holds the customer relationships together, who the team turns to in a crisis and who could step up given half a chance. That knowledge is rarely written down anywhere. It lives in the founder’s head.

Then the deal completes. The buyer has studied the accounts, the contracts and the senior team in great detail, but they haven’t met the Lesleys and the Mikes, and often the founder who knew their worth is on their way out. New reporting lines arrive, new processes follow, and everyone is quietly working out whether they still have a future. The people with options start taking those recruiter calls.

Mercer’s recent research, drawing on more than 200 transactions around the world, found that around 40 per cent of critical talent leaves within the first 18 to 24 months after a deal closes. Those aren’t the people the buyer expected to lose. They’re the ones the business was relying on.
The irony is painful. Buyers pay a premium for a business partly because of its people, and then lose some of the most valuable ones simply because nobody new thought to look for them. If your organisation grows by acquisition, finding the hidden diamonds in a business you’ve just bought should be one of the first things on the integration plan, not something left to chance.

◆  ◆  ◆

Money is simply the easiest thing to say when you’re leaving. The real reasons are almost always about whether anyone was paying attention.

◆   What they would have told you

If you could get the honest exit interview, the one from eighteen months before the resignation, I think you’d hear some version of three things.
The first is that nobody noticed. Not in a dramatic way, but in the slow, everyday sense of doing good work that nobody remarked on. People can carry on for a long time without praise, but very few can carry on indefinitely feeling invisible.
The second is that nobody said it out loud. Plenty of managers privately think highly of someone and simply never tell them. They assume the person knows, or they worry that saying it will create expectations they can’t meet. So the person never hears it, and fills the silence with their own conclusion, which is usually that they aren’t rated.

The third is that they couldn’t see a path. When every interesting role seems to go to someone from outside, or to the same few people who are always in the room, the message is very clear even if nobody ever says it. People don’t need a guaranteed promotion to stay, but they do need to believe that one is possible.

None of those reasons are about money, although money is what usually gets written on the form. Money is simply the easiest thing to say when you’re leaving, because it’s polite and nobody can argue with it. The real reasons are almost always about whether anyone was paying attention.

◆   What you could do on Monday morning

The simplest fix is to hold the conversation while it can still change something. Some organisations call it a stay interview, but it doesn’t need a name or a form. It just needs a manager to sit down with someone they’d hate to lose and ask why they stay, what would make them think about leaving, and what they’d love to be doing in a year’s time that they aren’t doing now. If the answers surprise you, that’s the point.

It helps to know what a good version of that conversation sounds like, because most managers have never been shown. It isn’t an appraisal and it shouldn’t feel like one. Do it somewhere informal, away from the usual meeting room, and start by saying plainly why you’re asking: you value them, you’d hate to lose them and you want to make sure the business is giving them a reason to stay. Then mostly listen. Ask what the best part of their week is and what the most frustrating part is. Ask what they’d change if they were running the team for a month. Ask whether there’s anything they’ve been thinking about doing that they haven’t mentioned. The aim isn’t to make promises on the spot, it’s to show that someone is paying attention, and then to follow up on at least one thing they said within a few weeks. That follow-up matters more than the conversation itself, because it’s the moment they discover you meant it.

The answers won’t always be comfortable. You may hear that a decision you made landed badly, or that someone feels stuck in a way you hadn’t noticed. That’s far better than reading about it in a resignation letter.

Next, say what you think. If someone in your team is quietly brilliant, tell them, and be specific about what you’ve seen. It costs nothing, it takes a minute, and for many people it will be the first time anyone has put it into words.

Then look honestly at who has been passed over recently. Every time a role goes to an outsider or to the usual names, there’s usually someone who wanted it and never said so. A short, honest conversation with that person afterwards, explaining the decision and talking about what could come next for them, can be the difference between a disappointed colleague and a resignation in eighteen months’ time.

And if you’re acquiring a business, make finding its hidden diamonds part of the deal work. Ask the outgoing founder and the senior team directly who the business couldn’t afford to lose below leadership level, and make sure someone in the new structure goes and has a proper conversation with each of them within the first few weeks.

◆   One question to sit with

THE QUESTION
If your best quiet performer resigned tomorrow, would you honestly be surprised?
 
If the answer is yes, it may be worth finding out whether they would be too. Keeping hidden diamonds is only half the job, though. Some of the people you notice won’t just want to stay, they’ll want to build something, and the next paper in this series looks at what happens when you give them the budget and the freedom to do it.

Sources
Gallup, State of the Global Workplace: United Kingdom country-level data, 2026 report covering 2025
Mercer, Bridging uncertainty: How strategic retention drives M&A outcomes, 2025