How much does human behaviour cost your business?
A verified cost analysis for organisations of 1,000 people
There is a number that will never appear on your company's P&L: what human behaviour is actually costing you.
Not misconduct, absenteeism but the everyday, invisible drag of disengagement, avoidance, and the conversations that never happen — running silently through every team, every meeting, every decision that gets delayed or diluted because nobody said the thing that needed saying.
Organisations have become extraordinarily precise about measurable costs. Procurement teams shave margins to fractions. Finance directors optimise fleet contracts down to the specification of the tyres. Software licences get audited quarterly.
And yet the single largest cost driver in most organisations never appears on the P&L.
Human behaviour.
Let's show our workings.
Layer one: the individual.
Source: Gallup, State of the Global Workplace
Gallup's State of the Global Workplace report confirmed what most leaders already sense: global employee engagement fell to 21% in 2024 — costing the world economy $438 billion in lost productivity in a single year.
At the individual level, Gallup puts the cost of an actively disengaged employee at 34% of their annual salary. Not their total package. Their salary.
On a $70,000 base: that is $23,800 per person, per year, in lost productivity alone.
Gallup estimates 16% of employees fall into the actively disengaged category. In a 1,000-person organisation, that is 160 people.
160 × $23,800 = $3.8M per year.
Layer two: the team.
Source: Crucial Learning (n=1,100). Mechanism: Robert Kegan, immunity to change.
Harvard psychologist Robert Kegan spent decades studying why organisations fail to change. His conclusion: most employees and leaders are not making decisions in service of the business. They are making decisions that remove their own fear — what he calls immunity to change. A hidden competing commitment that quietly overrides the stated one.
It shows up as the performance conversation that keeps getting rescheduled. The strategic risk nobody raises in the room. The peer feedback softened to the point of uselessness.
Research by Crucial Learning, drawn from 1,100 employees, establishes a $1,500 daily drag cost for every avoided conversation — the delay, the rework, the relationship cost, the decision made without the right input. Their 2021 study found that 91% of people are carrying at least one unresolved crucial conversation right now, and that half of them carry it for two weeks or more.
The workings:
People carrying at least one avoided conversation: 1,000 × 91% = 910 people
Cost per episode: $1,500 × 10 days = $15,000
Layer two subtotal (one conversation each): 910 × $15,000 = $13.6M
Additional cost — a conservative 30% carrying two or more simultaneously: 300 × $15,000 = $4.5M
Layer two annual cost: $18.1M
Note: these figures use a 10-day conservative duration. The documented average is 14+ days. Using the actual average would produce a cost of $19M+ for layer two alone.
Layer three: the organisation.
Source: McKinsey & Company, Some Employees Are Destroying Value, Others Are Building It, 2023
McKinsey research found that employee disengagement and attrition could cost a median-size S&P 500 company between $228 million and $355 million a year in lost productivity. Over five years, that is at least $1.1 billion in lost value per company.
The $228M figure applies to companies with typical attrition of 10%, combined with a 56% disengagement rate. Those with higher attrition — 20% — could be losing up to $355M annually.
These are not outlier organisations. These are the median. The middle of the distribution.
The number on the P&L that isn't there.
For a 1,000-person organisation generating $350M in annual revenue.
| Cost driver | Source | Assumption | Annual cost |
|---|---|---|---|
| Active disengagement | Gallup | 160 people × $23,800 (34% of $70K salary) | $3.8M |
| Cost of silence | Crucial Learning, 2021 | 910 people × $1,500 daily drag × 10 days | $13.6M |
| Concurrent avoidance | Crucial Learning, 2021 | 300 people carrying 2+ conversations × $1,500 × 10 days | $4.5M |
| Total invisible cost | Conservative estimate | $21.9M |
$21.9M. That is 6.3% of revenue. Unmeasured. Unmanaged. Not on the P&L.
To be explicit about what this model does not include:
The cost of the 64% 'not engaged' (as distinct from actively disengaged)
Attrition costs triggered by unresolved behavioural patterns
The cost of decisions made defensively rather than strategically
The cost of delayed or diluted decisions caused by avoided conversations
Quality and innovation drag from teams operating in a low-trust environment
The $21.9M is the floor. The actual cost is higher.
Most organisations would restructure entire divisions to recover 6% of revenue.
This one is hiding in plain sight.
What the three sources are actually describing.
Gallup, Crucial Learning and McKinsey are each measuring the same underlying phenomenon from a different angle.
What Kegan identifies as immunity to change — the psychological mechanism that makes silence feel safer than directness — Gallup measures as disengagement, and Crucial Learning traces through the cost of the conversations that never happen. McKinsey aggregates the result at organisational scale.
They are not three separate problems. They are one problem, measured three ways.
Why it stays off the P&L.
Every other significant cost in a business has an owner. Procurement owns spend. Finance owns capital. IT owns the licences. Behaviour has no owner, no category and no line — so nobody is accountable for it, and nobody is aggregating it.
It also doesn't arrive looking like a cost. It arrives as a delay. A dilution. A decision taken three times. A good person quietly pulling back. Each instance is small enough to absorb and easy to explain away as workload, personality or timing. It only becomes a number when you add it up — and nobody adds it up, because there has never been a column for the thing that never got said.
It should be the first line on the P&L, yet it isn't even on the page.
Sources.
Gallup, State of the Global Workplace. Global engagement and active disengagement rates. 34% salary cost of active disengagement. gallup.com
Crucial Learning (formerly VitalSmarts), Costly Conversations — December 2021 survey of 1,100 employees, published February 2022. Prevalence and cost of avoided conversations. cruciallearning.com
Crucial Learning / VitalSmarts, 2016 Costly Conversations study — baseline research establishing $7,500 and 7+ working days as the cost per conversation failure.
McKinsey & Company, Some Employees Are Destroying Value, Others Are Building It, 2023. Disengagement and attrition cost at the median S&P 500 company. mckinsey.com
Robert Kegan & Lisa Laskow Lahey, Immunity to Change: How to Overcome It and Unlock the Potential in Yourself and Your Organization. Harvard Business School Press, 2009. The framework for understanding immunity to change as the structural driver of defensive behaviour in organisations.
Revenue per employee benchmark: cross-industry global average of $350,000 per employee, used to establish the $350M revenue baseline for a 1,000-person organisation.
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