The (Hidden) Cost of Turnover

“Someone will come and fill your vacancy.” If you’ve never heard that sentence, you probably work somewhere pretty cool. But if you have heard it, or worse, if you’ve said it, come here; let me tell you something.

Thinking that when someone leaves, replacing them is a zero-cost process is a huge mistake. And it’s not just me saying it, the science backs it up. We can calculate the monetary cost quite easily, even without getting into the intangibles that come with a departure (and those are a whole different league).

The numbers don’t lie (but they hurt)

Before we get into it, let me set the stage with a few studies that might make you rethink the whole “someone else will come along” idea:

• Gallup Research estimates that replacing an employee costs between 50% and 200% of their annual salary. Yes, you read that right. If your dev earns €50K, you could spend up to €100K replacing them. (“And that’s a conservative estimate.”)
• Center for American Progress analyzed 30 case studies and concluded that the typical turnover cost is about 21% of annual salary (and that’s still conservative).
• For technical roles, Society for Human Resource Management (SHRM) puts it between 100–150% of salary.
• And here’s the kicker: the total cost for U.S. companies is about $1 trillion a year. Yes—trillion with a T.

Sure, there will be cases where you say, “Good riddance.” But for the ones where that’s not the case, here are a few reasons why replacing someone is nowhere near free.

The tangibles you actually see on the bill

• The time HR spends posting the job. That’s assuming you don’t have to rewrite or adapt the description first. Let’s take the easy case: copy the job description and post it on several platforms.
• The time those same people spend filtering and screening candidates, preparing a longlist and let’s assume it’s just a virtual one, without even contacting candidates yet to check interest or other factors.
• Your time, dear hiring manager, reviewing that longlist and maybe discarding a few profiles.
• HR time again contacting candidates and running the first interview round.
• Your time again doing second interviews, including reviewing technical tests if there are any.
• External agency costs if you use them (typically 15–25% of annual salary, which is no small thing).
• Reference checks and background checks. Those aren’t free either.
• Administrative offboarding costs: severance payments, benefits settlement, final payroll, paperwork… Someone has to do it, and that someone is paid for their time.
• Loss of productivity during the notice period (if there is one). Let’s be honest: the person leaving is already mentally on the beach.
• Tech costs: software licenses, equipment, access configuration, permission revocation… Your IT team is already tired of this.
• Potential legal costs, because if things get messy, lawyers don’t work for free.
• And once you finally have the replacement: Onboarding time, training, and the ramp-up period until they become productive. That’s easily quantifiable too.
• Mistakes from the new employee during the learning phase that others will have to fix (which can be very expensive depending on the sector).
• Everyone else’s time helping the new person, not just the assigned trainer, but half the team answering questions like “Where’s file X?” and “How do we do Y?”
• Loss of sales or revenue while the role is vacant, especially painful in commercial roles.
• Opportunity cost: projects delayed or canceled because “we don’t have anyone for that right now.”

The intangibles you don’t see until they blow up in your face

Now let’s get into the intangibles—and this is where things really get serious.

During all this time, assuming the role wasn’t some isolated niche function that could simply pause:

• Someone had to pick up the slack, creating overload (hello burnout for the people who stay).
• You probably did a knowledge handover, but things were definitely lost along the way. And don’t tell me “everything is documented” because we both know it isn’t.
• The client relationship may suffer because their main contact changed (and clients have excellent memories).
• The savoir-faire of the person who left is gone. That intangible is unique to each individual.
• Loss of undocumented institutional knowledge: the informal “know-how” about why something was done a certain way or who to talk to in order to get something done.
• The domino or “contagion” effect: when a valuable employee leaves, others start wondering, “Why am I still here?”. Studies suggest this is one of the most devastating hidden costs.
• Disruption of organizational culture, especially if several people leave at once. Culture doesn’t appear out of nowhere.
• Loss of professional networks that person had built and that you could previously leverage.
• Damage to your employer brand: Glassdoor, LinkedIn, word of mouth… everything counts. Recruiting for a company with a bad reputation is extremely expensive.
• Impact on team morale: “If María is leaving, maybe she knows something I don’t.” (Spoiler: that’s not paranoia, it’s logic.)
• Stress and burnout among those who stay and take on extra work (which leads to… more turnover. A vicious cycle).
• Loss of mentorship: if the person leaving was a senior mentoring others, you just lost a talent-creation machine.
• Massive productivity gap: according to Josh Bersin, it can take 1–2 years for a new employee to reach the productivity level of a high performer who left. Read that again.
• Loss of team cohesion and established dynamics, that “working without speaking” rhythm that only comes with time.
• Impact on innovation: ideas and projects that were in that person’s head may never see the light of day.
• Damage to relationships with stakeholders: investors, partners, suppliers… everyone asks: “Where’s María?”
• Organizational uncertainty, when people start wondering whether the ship is sinking.
• Knowledge going straight to competitors: the former employee now knows exactly how you operate, what works, and what doesn’t.
• Emotional cost for managers and HR: the fatigue of constantly recruiting instead of building.
• Interruption of mid-term projects and loss of momentum already achieved.

The stat that will make you jump out of your chair

Multiple studies agree on one thing: two-thirds of turnover costs are intangible.

Yes, you read that correctly. What you don’t see is double what you do see.

So when you calculate, “Well, replacing them will cost us about €10K,” multiply that by three. And cry.

But wait, there’s more (and it’s worse)

A Wharton School study analyzed 50 million mobile phones and found that every one-percentage-point increase in weekly turnover raised product failure rates by 0.74–0.79%. The associated costs: hundreds of millions of dollars.

And the best part? The weeks after payday (when more people resigned) had 10.2% more product failures than the weeks before payday. Turnover doesn’t just cost you in recruiting; it also hurts product quality.

In conclusion

Yes, dear ones, people aren’t easily replaceable commodities. There’s a cost (a big, measurable one) and there are intangibles that get lost along the way—things that can sink teams, projects, and entire companies.

And for anyone still thinking “someone else will come along,” let me tell you something: Gallup found that 52% of employees who leave say their manager or the organization could have prevented it. And 51% say that, in the three months before they left, no one—NO ONE—spoke with them about their job satisfaction or their future at the company.

So the next time someone announces they’re leaving and you think “it’s fine, someone else will come,” remember this article. And remember your profit and loss statement. Because that one will remember.

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Want to know a little more about who wrote this article? 👇

Víctor Manuel Benet

I work as an IT Project Manager, helping teams turn good ideas into projects that actually get delivered. I like working between business and technology to make things happen.
I especially enjoy complex projects, diverse teams, and ambitious goals. I believe in clear communication, pragmatism, and continuously improving how we work.