The real cost of employee turnover in Australia

Key takeaways

• The cost of turnover is mostly the part you can't see on an invoice. The recruitment fee is the small, visible tip of a much larger iceberg.
• Direct costs are the obvious ones: advertising, agency fees, and the time your people spend hiring instead of doing their jobs.
• Hidden costs, lost productivity, the empty seat, onboarding drag, knowledge walking out the door, and the hit to the team left behind, usually dwarf the direct ones.
• Leaders underestimate turnover cost because most of it never lands as a single line in a budget, so it stays invisible.
• Don't take a generic industry percentage and assume it fits you. Work out your own number from your own figures.

A finance director once told me, quite confidently, that a resignation "costs us the recruiter fee, so maybe fifteen percent of salary." I asked him to walk me through what actually happened the last time his best analyst left. Twenty minutes later he'd talked himself from fifteen percent to something that made him go quiet.

That conversation happens a lot. Not because leaders are careless, but because most of what turnover costs never shows up as a line item anyone signs off on. So let's make the invisible part visible.

The costs you can see

Start with the direct costs, because they're the ones people actually think of. These land as real, traceable spend.

• Advertising and agency fees. Job board listings, and often a recruiter's percentage on top for anything hard to fill.
• The time your own people spend hiring. Every hour a manager, a panel and your HR team spend writing the ad, screening, interviewing and checking references is an hour not spent on their actual work. It doesn't invoice, but it's real.
• Administration. Contracts, background checks, setting up systems and equipment, the paperwork of exit and entry.

These are genuine, and they add up. But if this is the whole number in your head, you're looking at the tip of the iceberg and calling it the iceberg.

The costs you can't see (and they're bigger)

The hidden costs are where the real money is, and they're hidden precisely because none of them arrives as a single, obvious bill.

The empty seat. From the day someone resigns to the day a replacement is genuinely up to speed, that work either doesn't happen, gets done more slowly, or gets absorbed by colleagues who are now overloaded. That gap can run for months, and it's a productivity cost the whole time.

The ramp-up drag. A new hire isn't at full output on day one, or in month one. There's a stretch where they're learning, asking questions, and taking up other people's time to get there. You're paying a full salary for partial output, and paying other people's time to bring them up.

Knowledge walking out the door. When someone experienced leaves, they take context with them. The undocumented workaround, the client relationship, the reason you do a thing a certain way. Some of that is never fully recovered, and rebuilding it is slow.

The hit to the people left behind. This is the one leaders miss most. A resignation, especially of someone well liked or high performing, lands on the remaining team as extra workload and, often, a quiet question: should I be looking too? One departure can nudge others toward the door, and that contagion effect is a genuine cost that never appears anywhere you'd think to look.

Lost momentum. Projects stall, decisions wait, and relationships built over years reset to zero. Hard to quantify, easy to feel.

Why leaders underestimate it so badly

If the hidden costs are so large, why do smart people consistently lowball them? A few reasons, and they're all structural rather than a failure of intelligence.

The visible costs have an invoice. The hidden ones don't. We anchor on the number we can see. A recruiter's fee is concrete. "Four months of a team running at eighty percent" is real but never gets totalled, so it doesn't feel like a cost.

The cost is spread across many people and months. No single person absorbs the whole hit, so no single person feels its full weight. The manager sees some, the team feels some, the customer notices a little. Nobody adds it up.

By the time the true cost lands, the resignation is old news. The expensive part, the slow productivity drag, plays out over the months after someone's gone, long after the "we lost Priya" moment has faded. The cause and the cost are separated by time, so we don't connect them.

This is exactly why turnover gets treated as a cost of doing business rather than a problem worth preventing. The prevention, retaining people, competes for budget against things with a clear invoice, and loses, because its payoff is a cost that never shows up.

Work out your own number

Here's the thing I'd push back on hardest: don't grab a generic "turnover costs X percent of salary" figure off the internet and assume it applies to you. It won't. The real cost depends on the role, how hard it is to fill, how much specialist knowledge it holds, and how long the seat sits empty. A frontline role and a senior specialist are not remotely the same number.

The more useful exercise is to work it out for your own organisation, from your own figures. That's exactly what our turnover cost calculator is for. Put in your own salaries, time-to-fill and ramp-up assumptions, and it gives you a number grounded in your reality rather than someone else's average. In my experience it tends to be a far better conversation starter with a board than any statistic I could quote, precisely because it's theirs and they can't argue with their own inputs.

A short example

A professional services firm treated a departing consultant as roughly a recruiter's fee, a few weeks of admin, call it a known, tolerable cost. Then one departure turned into three over six months, all from the same team.

When we actually mapped it, the fees were the smallest part. The bigger costs were a project that slipped by months because the person who understood it had gone, two long-standing client relationships that needed rebuilding from scratch, and a surviving team so stretched that a fourth person started interviewing elsewhere. None of that ever appeared as a line in the budget. All of it was real, and most of it was avoidable.

Once they'd seen the actual shape of the cost, the case for investing in retention stopped being a soft "people matter" argument and became a straightforward financial one. What genuinely keeps people, and how to act before they go, is the subject of the complete guide on employee retention, and the development side of it is what our Transformation work supports.

Frequently asked questions

How much does employee turnover actually cost?

It varies far too much for a single honest figure, which is the whole point. It depends on the role's seniority, how hard it is to fill, how much specialist knowledge sits in it, and how long the seat stays empty. A frontline replacement and a senior specialist can differ by an order of magnitude. Work it out from your own numbers rather than borrowing an average.

What's the biggest hidden cost of turnover?

Usually lost productivity across the whole gap, from the day someone resigns until their replacement is genuinely up to speed, which can run for months. Close behind it is the knowledge that leaves with an experienced person and the effect on the remaining team, who absorb the extra load and sometimes start looking themselves.

Why do leaders underestimate turnover cost?

Because most of the cost never arrives as a single invoice. The recruiter's fee is visible and concrete, while the productivity drag, the knowledge loss and the strain on the team are spread across many people and months. What has no line item tends to feel like it has no cost, even when it's the larger figure.

Is it cheaper to retain people or replace them?

Almost always cheaper to retain, once you count the hidden costs honestly, though it depends on the role and the situation. The catch is that retention spending has a clear cost now and a payoff that shows up as an expense you avoid later, which is harder to see. Calculating your real turnover cost is what makes that trade-off visible enough to act on.

If you added up every cost of your last significant resignation, the empty seat, the slow ramp-up, the lost knowledge, the strain on everyone who stayed, would the number surprise you as much as it surprised that finance director?