Here’s a pattern every experienced employer will recognise. Someone comes back from their summer holiday looking rested and refreshed. A few weeks later, they hand in their notice.
It’s no coincidence. Time away gives people space to think, and early autumn is consistently among the busiest times of the year for job moves. People return from their holidays, take stock of their working lives, and some of them quietly decide it’s time for a change.
Which makes right now the perfect moment to understand why good people leave in the first place. Because by the time a resignation letter lands on your desk, the decision was made weeks or months earlier, quietly, while nobody was asking the right questions.
What losing a good employee costs
Let’s start with the numbers, because retention only tends to get taken seriously once it reaches the spreadsheet.
There’s the obvious cost of losing someone: recruitment fees, job advertising, and the hours of management time spent sifting CVs and running interviews. Then there’s the less visible cost, which is usually far bigger. Months of reduced output while the new person gets up to speed. Knowledge and relationships that walk out the door with the leaver. The extra load on the rest of the team while the seat sits empty, which quietly puts the next resignation at risk too.
Most estimates put the true cost of replacing an employee at somewhere between six months and a year of their salary. On a £35,000 role, that’s realistically £20,000 to £35,000 gone, with nothing to show for it. Lose three people in a year, and you’ve spent a good salary on standing still.
It’s worth pausing on that. If turnover were an invoice that arrived in the post, every business in the country would be working hard to shrink it. Because it hides across a dozen budget lines, it often goes unchallenged for years.
It’s almost never just the money
Ask any HR professional who has read a few hundred exit interviews, and they’ll tell you the same thing. Pay matters, and it needs to be fair and keep pace with the market. But when good people leave, money is usually the final nudge rather than the real reason. It’s simply the easiest thing to write in a resignation letter.
The real reasons tend to come from a much more human list.
Their work goes unnoticed. Effort without recognition has a shelf life. People will work hard for a long time without a thank you, but not forever. Employees who feel invisible don’t usually complain. They just start looking.
They can’t see what comes next. Ambitious people don’t wait around to find out whether there’s a future for them. If the path isn’t visible, they assume it doesn’t exist, and “there was nowhere for me to grow” becomes the line in the exit interview, whether it was true or not.
The manager relationship isn’t working. The old saying holds up: people leave managers, not companies. The relationship with a direct manager shapes someone’s day-to-day working life more than pay, perks, or the office coffee machine ever will. Where that relationship is strained, everything else must work twice as hard to compensate.
They’re carrying too much for too long. Being rewarded for good work with more work, indefinitely, is a resignation in slow motion. Your most capable people are often the most quietly overloaded, precisely because they can be relied upon.
The flexibility they need isn’t there. Life happens. School runs, caring responsibilities, evening courses. Employers who won’t bend lose people to employers who will, and the person rarely mentions it until they’ve already found somewhere that said yes.
Here’s the hopeful part. Every single item on that list is within an employer’s control, and none of them costs anywhere near as much as replacing the person.
The warning signs were there all along
The most common reaction to a valued employee resigning is surprise. And that surprise is itself the diagnosis, because it means nobody was asking the right questions while the answers could still change something.
Most businesses do exit interviews. The best businesses do stay interviews.
An exit interview tells you why someone left, at the precise moment it’s too late to do anything about it. A stay interview asks your valued people why they stay, what they enjoy, what frustrates them, and what might one day tempt them away, while there’s still time to act on the answers.
The method could not be simpler. Thirty minutes, a cup of tea, and five honest questions:
What do you look forward to at work? What would you change tomorrow if you could? Do you feel your work gets the recognition it deserves? Where would you like to be in two years? And, gently, what might ever make you consider leaving?
Then comes the part that matters most: doing something with what you hear. A stay interview followed by silence is worse than no interview at all. But handled well, these conversations regularly outperform pay rises and counteroffers, because they address the real reasons people go. Most employees have never once been asked why they stay. Being asked is powerful all by itself.
The question every employer should ask themselves
If your best person resigned tomorrow, would it surprise you?
If the honest answer is yes, that’s not a reason to panic. It’s a reason to start the conversations, because the businesses that keep their best people are simply the ones who ask before someone else does.
In our next article, we’ll cover the other half of the story: the practical steps smart employers take to keep good people, from onboarding and recognition to career conversations, manager training, and flexibility.
Worried about holding onto your best people?
At Altum HR, we help businesses across the UK understand where their retention risks are and what to do about them. Our People & Retention Reviews look at how you recruit, onboard, develop, and engage your team, and provide a clear, practical plan to retain the people your business depends on.
Book your HR Consultation today.
📧 enquiry@altumhr.co.uk 📞 0800 0485 764 💬 WhatsApp: 07432 275612
