The Quiet Line Item That Is Costing You Millions

There are costs in your business that are visible; often scrutinised, debated, and subsequently optimised. Then there are costs that sit quietly beneath the surface. Rarely challenged or quantified properly. Yet they compound year after year, eroding profitability and weakening competitive advantage.

Employee turnover is one of them.

Most CEOs encounter turnover as a percentage. It appears in a quarterly report, is compared against industry benchmarks, and (if it seems acceptable) is quickly deprioritised. This framing is misleading because turnover is not only a people and culture metric, it is also a financial one. It is a performance indicator and in many cases, a signal of misallocated capital.

If it is not being calculated properly, it is almost certainly being underestimated.

The Cost You Don’t See

The common narrative around turnover focuses on hiring costs; agency fees, job ads, onboarding. These are visible, easy to account for, and therefore overemphasised.

The real cost sits in places that are far too inconspicuous to notice at first glance. 

When someone leaves, value creation does not simply pause; it fragments. The role ceases to produce at full capacity and more often than not, the surrounding team absorbs the gap and becomes less effective. The incoming replacement, no matter how capable, requires time to reach full productivity.

This gap (between departure and full contribution) is where most of the economic loss occurs. It is also where most organisations stop measuring.

What It Looks Like in Practice

Consider a mid-level manager earning $120,000 annually, contributing approximately $300,000 in value to the organisation.

When they resign, the first impact is vacancy: For a period (often 60 days or more) the role delivers little to no output. At a daily value of roughly $1,364, that vacancy alone represents a loss of over $80,000.

Replacement introduces its own layer of cost: Recruitment fees, typically around 20% of salary, combined with internal hiring time, can conservatively reach $30,000.

But the most underestimated phase is what follows: Ramp-up. A new hire rarely performs at full capacity immediately. If productivity sits at 50% over the first six months, the organisation effectively forfeits another $30,000 in unrealised value.

By the time the role stabilises, the total cost of a single resignation can exceed $140,000; more than the employee’s annual salary.

And this, of course, assumes everything goes well.

When Hiring Goes Wrong

The economics become significantly more severe when the issue is not turnover alone, but poor hiring decisions.

A mis-hire doesn’t simply reset the process; it compounds it.

Imagine hiring a senior leader who exits within six months. The business absorbs half a year of salary, the initial recruitment cost, and a period of underperformance that often extends beyond what is formally acknowledged. The team adjusts, compensates, and in many cases slows down. Strategic initiatives lose momentum.

Then the cycle begins again.

A second recruitment process; another vacancy period; another ramp-up phase.

It is not uncommon for the total impact of a single failed hire to reach $200,000 to $250,000 or more. And this still excludes the harder-to-quantify consequences: reputational damage and cultural friction.  Even in the absence of obvious hiring failures, so-called “normal” turnover carries a significant cost. A team of ten people experiencing 30% turnover may quietly lose hundreds of thousands of dollars over a few years without any single event triggering concern.

More subtle still is the productivity tax imposed on those who remain. Small declines in focus and increased workload accumulate. A marginal 5% drop in productivity across a team can translate into six-figure losses annually, none of which appear explicitly in financial reporting.

Why It’s Consistently Underestimated

There are structural reasons why turnover remains under-analysed.

Traditional accounting captures explicit costs but struggles with opportunity cost and unrealised value. Responsibility for turnover often sits within HR, while its consequences are felt across revenue, operations, and strategy. And short reporting cycles obscure the cumulative nature of the problem.

The result is a systematic underestimation of impact and therefore a lack of urgency in addressing it.

A Strategic Perspective

At a CEO level, turnover is a question of capital efficiency.

Every hire represents an investment and every failed hire represents a loss. To take this even further, every preventable resignation represents avoidable leakage.

Framed this way, the objective shifts and it’s no longer about reducing turnover in isolation. It is about improving the accuracy and quality of hiring decisions.

Organisations that perform well in this area do not rely on intuition alone. They define roles with clarity, focusing on outcomes rather than generic responsibilities and they structure hiring processes to reduce bias and increase predictive accuracy. They assess not only capability, but alignment between the individual, the role, and the environment in which they will operate.

The goal is more about precision than it is about speed because the economic return on getting it right the first time is substantial.

What CEOs Should Pay Attention To

To understand the true impact of turnover, it is necessary to move beyond surface-level metrics.

What matters is not simply how many people leave, but what each departure actually costs. 

• How long it takes for a replacement to reach full productivity. 
• How frequently new hires fail within their first year. 
• How performance varies across hiring decisions. 
• How all of this connects to revenue per employee and overall output.

Without this level of visibility, organisations are operating with incomplete financial information.

Final Thought

Turnover is often treated as inevitable, and this is true to a certain degree. But in reality, much of its cost is avoidable.

When measured properly, it becomes clear that hiring decisions are among the most financially consequential choices an organisation makes.

Getting the wrong person into a role is expensive.

Getting the right person into the right role is one of the highest-return investments available.

Appendix: How to Calculate Your Own Turnover Cost

The following provides a practical way to estimate the financial impact of turnover using your own data.

The cost of vacancy can be approximated by dividing annual revenue (or value) per employee by the number of working days in a year (typically 220), and then multiplying by the number of days the role remains unfilled. 

For example, if revenue per employee is $300,000 and the role is vacant for 60 days, the calculation becomes $300,000 ÷ 220 × 60, resulting in approximately $81,840 in lost value.

Recruitment cost is calculated by combining external and internal expenses. 

For example, if a role with a $120,000 salary incurs a 20% agency fee ($24,000) and approximately $6,000 in internal hiring costs, the total recruitment cost is $30,000.

Ramp-up loss reflects the gap between full productivity and the performance of a new hire during their initial months. 

For example, if a new employee operates at roughly 50% productivity for the first six months, the organisation effectively loses half of half a year’s salary. In this case, $120,000 × 0.5 × 0.5 results in a loss of $30,000.

When combined, these components provide a conservative estimate of total turnover cost. 

Using the figures above, $81,840 (vacancy) + $30,000 (recruitment) + $30,000 (ramp-up) results in a total cost of $141,840.

As a general guide, turnover costs tend to range from:

• 30% to 50% of salary for entry-level roles, 
• 50% to 100% for mid-level positions, and 
• can exceed 100% to 200% for senior or highly specialised roles.

A useful exercise is to apply this framework across your organisation. Multiply the cost per departure by the number of employees who left in the past year. The resulting figure often reveals a level of financial impact that has previously gone unnoticed, and once seen, is difficult to ignore.