The cost shows up in turnover, lost time, slow delivery, poor decisions, failed change programs and missed revenue. It shows up in the P&L long before it shows up in an engagement survey.
Gallup has found that managers account for at least 70% of the difference in employee engagement scores across teams. Its 2026 State of the Global Workplace report found that global employee engagement fell to 20% in 2025 (its lowest level since 2020), costing the world economy an estimated US$10 trillion in lost productivity, or roughly 9% of global GDP. The report linked much of this recent downturn to a steep decline in manager engagement, which plummeted to just 22% globally.
In other words, middle management is not a soft layer. It is a financial lever.
The invisible leak in business performance
An under-supported middle manager does not always look like an obvious failure. They may still attend the meetings, submit the reports, answer the messages and keep the team moving.
But the leak is already happening.
They spend too much time firefighting. They avoid hard conversations because they do not feel equipped to handle them. They pass unclear priorities down to their team because they do not know how to challenge them upwards. They say yes to every executive request, even when the team has no capacity to deliver it well.
The result is a hidden management tax. The business pays for it through wasted time, weaker execution and preventable turnover.
Australian data makes this cost harder to ignore. Research commissioned by SafetyCulture found that middle managers in frontline industries spend an average of 6.5 weeks a year on low-value or unnecessary tasks, with wasted time estimated to cost the Australian economy AUD$15.5 billion annually. The main drains included email overload, rostering and duplicate data entry across systems.
That is time not spent coaching, improving systems, lifting performance or solving problems before they become expensive.
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The first cost is turnover
The most visible cost of poor management is turnover.
When a middle manager leaves, the business does not just lose a salary line. It loses context, team trust, operational knowledge and the informal glue that holds work together.
The cost includes recruitment, onboarding, lost productivity, leadership handover, team disruption and the time it takes for a new manager to earn trust. For senior or specialist middle managers, this can be a serious financial hit.
A simple model looks like this:
- Manager salary: $150,000
- Replacement cost at 2.5x salary: $375,000
- Recruitment and onboarding delay: 3 to 6 months
- Team disruption: reduced output, slower decisions and higher flight risk
Even if a business uses a more conservative replacement estimate, the cost is rarely small. And this model only covers the manager leaving. It does not include the employees who may leave because that manager was not supported, trained or effective.
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The second cost is productivity drag
Turnover is expensive, but it is not the only cost. Sometimes, the more dangerous problem is the manager who stays but disengages.
This is the quit and stay problem. The manager remains on payroll, but operates below full capacity. They stop improving processes. They stop pushing back. They stop coaching with energy. They do just enough to keep the machine running.
That creates a productivity drag across the whole team.
If a manager leads 10 people, the cost is not limited to the manager’s own reduced output. Their disengagement affects the clarity, pace and focus of everyone below them. Gallup’s research shows that manager engagement affects team engagement, and team engagement affects productivity.
A simple CFO model could look like this:
- Team size: 10 employees
- Average salary: $100,000
- Total team salary: $1,000,000
- Productivity drag from poor management: 7% to 10%
- Annual leakage: $70,000 to $100,000 per team
Now multiply that across 20, 50 or 100 managers.
This is why middle management effectiveness should be measured as a business performance issue. The cost compounds.
The third cost is poor execution
The highest cost of under-supported middle managers may be failed execution.
Most strategies do not fail because the idea was wrong. They fail because the business cannot carry the change through the middle.
A new system is introduced, but the team does not understand it. A new process is announced, but old habits continue. A new priority is set, but managers do not have the confidence or skill to reset expectations, handle resistance or escalate risks early.
This is where the change failure tax appears.
The Queensland Health payroll failure is a stark Australian warning of this tax in action. Originally budgeted at just AU$6 million for the health department’s share, the botched implementation ultimately cost taxpayers over AU$1.2 billion to rectify and left 78,000 frontline healthcare workers with severe pay errors.
The official Commission of Inquiry revealed that the issue was not simply technology. Executives set an arbitrary, immovable deadline to replace the legacy system, but the middle management layers were left entirely unsupported. They lacked the training and authority to handle the sheer complexity of the change, resulting in a critical breakdown in planning, preparation, controls, and execution across the department.
For most businesses, the numbers may be smaller. But the pattern is familiar. Technology is bought. Strategy is approved. Change is announced. Then the middle layer is expected to make it work without enough training, authority, or support.
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Development is risk control.
The business case is simple: if one unsupported manager can create a six-figure replacement cost, a 7% to 10% team productivity drag and a higher risk of failed execution, then management development is not a discretionary HR spend.
It is protection against leakage.
Strong middle managers improve clarity, reduce churn, coach better performance and help strategy move faster through the business. They know how to manage up and down. They can hold commercial goals and human realities at the same time. They do not just absorb pressure. They turn it into better decisions.
That is the shift businesses need to make. Middle management should not be viewed as a cost centre. Done well, it is a profit protection layer.
Most developing leader programs focus on inspiration. Peeplcoach’s Build Program focuses on effectiveness. It gives middle managers the practical tools, coaching and structure they need to lead better, reduce the management tax and accelerate strategy execution.
Explore our programs for middle managers.
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