Employee disengagement rarely happens overnight, yet organisations often miss the subtle behavioural changes that signal much trouble ahead. Laura Brennan explores why traditional performance measures fail to capture emerging problems, and how recognising withdrawal, mistrust and declining collaboration could help leaders prevent costly consequences before they become impossible to ignore.
In 2024, the drop in global employee engagement cost the world economy $438 billion in lost productivity. This wasn’t through redundancy or restructure, but through the quiet, cumulative effect of people showing up while steadily disconnecting. Gallup’s 2025 State of the Global Workplace report found managers were the most affected group, dropping five percentage points in a single year.
This did not happen suddenly. It never does. Before disengagement shows up in data, it shows up in behaviour. And most organisations are not built to read it.
What the numbers don’t show
According to the CIPD, average UK employee turnover sits at 34%. The average cost of replacing a single employee earning over £25,000 is £30,614. For specialist or senior roles, that figure rises to between £40,000 and £100,000. These are the figures organisations track. What they rarely track is what preceded them.
Months before someone hands in notice the signal was already there
People do not disengage cleanly or suddenly. They withdraw gradually, in how they communicate, how they contribute, and how much of themselves they bring to a decision. Months before someone hands in notice, or a project stalls, or a team stops functioning at the level it was, the signal was already there. It simply had nowhere useful to go.
A systematic review of organisational failure found the most consistent early markers were behavioural: employee mistrust, withdrawal from collaboration, low morale, internal conflict. None of these appear in a performance dashboard until the damage has already taken hold. By the time a risk registers formally, it has typically been developing beneath the surface for weeks, sometimes months.
The cost organisations are paying is real. The cause is rarely where they are looking.
The gap that processes cannot fill
The typical response is to improve the process: better feedback mechanisms, more frequent check-ins, updated risk frameworks. These are sensible. They are also insufficient, because the problem is not structural. It is perceptual.
A study on psychological safety in complex project environments found that the single most important factor in whether people surfaced concerns was not policy or reporting structure, it was the behaviour of the person directly above them. Where speaking up felt unsafe, people continued to perform while silently absorbing strain the organisation could not detect.
Gallup’s research finds that managers account for 70% of the variance in team engagement. When a manager is absorbing strain invisibly, the effect moves through everyone around them, long before it appears in any measure of performance.
Why this belongs in every role, not just at the top
Behavioural strain does not respect hierarchy. It presents at every level of a system simultaneously. A team member who notices a colleague withdrawing is reading the same category of signal as a director observing a shift in how their leadership team engages. Both are data. The difference is whether the organisation has built conditions in which that data can move, where it can be named, heard, and acted on before it compounds.
The organisations that navigate pressure well are not always the ones with the most sophisticated frameworks. They are the ones where people closest to emerging problems have the capability and confidence to name what they are seeing, and where that information can actually reach the people who need it.
The signal was already there
Failed projects, delayed decisions, institutional knowledge walking out of the door. None of this appears in a turnover figure. It accumulates quietly, in the space between what an organisation measures and what it can actually see.
The $438 billion is not an anomaly. It is the aggregate cost of signals that went unread across an entire year.
The question for any organisation is not whether those signals exist within their system. They almost certainly do. The question is whether they have built the sensitivity to catch them before the cost of missing them shows up somewhere it can finally be counted.
Laura Brennan is a Behavioural Systems Specialist and the Founder of I CAN Collective
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