Every company has two or three people it cannot afford to lose.
You already know their names. So does your leadership team. In fact, you could probably write the list in under a minute.
That is not the problem.
The problem is that the list lives in your head. Nobody has written it down, tested it, or priced it. Meanwhile, it sits among the largest positions on your balance sheet.
Before we get to what that costs, it helps to be clear about what human capital actually is. Most people use the term loosely. Its actual history tells you far more than the jargon suggests.
Human capital is an economic idea, not a human resources term
The concept came out of the University of Chicago and Columbia between 1958 and 1974.
Theodore Schultz gave it a name in 1961. He argued that workers had become capitalists through acquired skills with real economic value. Gary Becker then built the math in 1964, work that later earned him a Nobel Prize. Jacob Mincer made it measurable in 1974.
The core claim is simple. Deliberate investment builds people into an asset. They are not a cost line you manage down.
Becker added the distinction that still matters most. He split human capital into two kinds.
General human capital travels. It is the training, credentials, and portable skill a person carries to any employer.
Specific human capital does not travel. Instead, it is knowledge of your customers, your operating model, your informal decision rights. Inside your company it is valuable. Outside it, nearly worthless.
That second category never appears on a balance sheet. Also, you can’t rebuild it quickly. It took years to accumulate, and it leaves in a single afternoon. Specific capital, in other words, is where human capital risk actually sits.
Then the definition changed
For decades, people treated human capital as an individual trait. You had it or you did not.
Robert Ployhart and Thomas Moliterno broke that assumption in 2011. Their argument: individual skills do not simply add up to organizational capability. Instead, capability emerges through how a unit coordinates, communicates, and shares context.
Three years later the field published a paper titled “Human Capital Is Dead; Long Live Human Capital Resources.” The provocation carries a real correction.
Here is the sharpest line in that literature. A brilliant person whose knowledge the organization cannot reach is not, strategically, a human capital resource at all.
Which reframes the whole question. You are not underwriting résumés. Rather, you are underwriting whether capability stays reachable when any one person is gone.
A meta-analysis across 66 studies tested this. The link between human capital and firm performance runs strongest when that capital is not readily tradable. In other words, the least portable capability is the most valuable. It is also the most fragile.
Then AI moved the line
Here is the part that makes this a 2026 conversation rather than a 1964 one.
AI is very good at the general layer. It drafts, summarizes, researches, models, and codifies. Consequently, the portable skills that once justified a hire are getting cheaper by the quarter.
However, AI has no access to your specific layer. It does not know why that client relationship survived a bad year. It cannot reconstruct the reasoning behind a pricing exception made in 2019.
So AI did not reduce human capital risk. Instead, it concentrated it.
As the general layer commoditizes, more of your remaining value sits in the specific, emergent layer. That layer lives in fewer people than it used to. Therefore human capital risk got denser, not lighter.
Turnover is not the risk. Concentration is.
Bain reports that ownership periods now run about seven years, up from five to six between 2010 and 2021. Furthermore, Bain finds returns start to stagnate around year seven.
Now set the turnover data beside it. AlixPartners found that 65% of investors see chief executive turnover during that window. Only 9% say they rarely replace the chief executive. Moreover, 83% say unplanned turnover stretches the timeline.
So a leadership change is close to a planning assumption. Still, most organizations treat it as a shock.
The departure itself is rarely the damage. Instead, human capital risk is the share of specific capital that walks out with the person.
The market already put a number on it
You may have no intention of selling anything. Still, the people who buy companies have run this math.
McKinsey studied what it calls chief executive alpha. In that research, 94% of general partners agreed on one finding. Company leadership drives an average of 53% of investment returns.
Read that again. More than half the return, resting on the leadership layer.
The same work found something sharper. Investors who get talent right in the first year achieve 2.5 times the return on initial capital.
Why it stays a feeling instead of a number
Part of the answer is that measurement never caught up.
That is finally changing. The international standard for human capital reporting, ISO 30414, was withdrawn in August 2025 and replaced. Notably, the new edition moved from “guidelines” to “requirements and recommendations.” Three of its eleven reporting areas map directly onto bench risk.
Meanwhile the regulator went the other way. The US Securities and Exchange Commission dropped its proposed expansion of human capital disclosure from the 2025 agenda. As a result, the market sets this bar now, not Washington.
Researchers have documented the leadership gap thoroughly. Heidrick & Struggles surveyed US boards and chief executives. At more than a third of US companies, the chief executive lacks the capabilities the business needs. Moreover, only 25% of leaders treat succession planning as a priority. One-third track no metrics at all.
Deloitte’s 2026 human capital research lands in the same place. Eighty-five percent of leaders call adaptability critical. Yet only 7% say they lead on helping the workforce adapt.
Everyone agrees the layer matters. Almost nobody instruments it. As a result, human capital risk stays a conversation rather than a number.
The five places human capital risk hides
Across the companies I work with, the exposure clusters in five areas. Two sit on paper. Three surface only under pressure.
Key-person and concentration risk. Which relationships, decisions, and knowledge run through one or two people? If a key seat went dark for ninety days, what stalls?
Bench depth and succession readiness. Are there ready-now successors for the seats most likely to turn? I made this case in “The Bench is the Whole Game” — bench depth rarely shows on an org chart. It shows the week somebody leaves.
On-ramping and integration speed. When a seat turns, how fast does the next person reach full contribution? Three months and twelve months are different companies.
Alignment and durability. Do incentives match the horizon you actually operate on? Vesting that outlasts commitment is a quiet exposure.
Momentum and focus. Does the strategy live in the company, or only in a few heads? Decisions either flow or they stall.
Those five carry different weight. Key-person concentration carries the most. Still, the last three cause the most damage. For example, they surface only after something has already changed.
What this means for real leaders in plain English
Here is the plain version. Your company knows things that exist nowhere except in a few people. That knowledge is genuinely valuable, and it is genuinely fragile.
AI has made this sharper, not softer. The work a machine can now do was never your advantage anyway. What remains is the part only your people hold. So your remaining edge and your remaining human capital risk describe the same thing.
You already sense whether your team could carry the plan without you, or without your best two people. You have just never written it down in a form anybody could argue with.
That instinct is usually right. Nevertheless, an instinct does not transfer. It does not survive a board conversation, a diligence process, or your own absence.
If you run a company, human capital risk is the gap between what you know and what you can show. If you buy companies, it is the line your model leaves qualitative. I made a version of this case in “Succession Planning is a Valuation Problem”, and it holds here too.
Either way, somebody eventually prices it. Better that it is you, early, while you can still change the answer.
That is the conversation worth having.
Putting a number on it
Alchemy Leadership Lab works at the structural layer, where leadership directly shapes enterprise value. Specifically, we built a Human Capital Risk Assessment.
Twenty questions. Five weighted domains. About four minutes.
It returns a figure we call Human Capital Value-at-Risk. The number weighs five exposures: leadership concentration, thin bench, slow on-ramping, misaligned incentives, and stalled momentum. Therefore the math stays visible rather than hidden.
We built the deal version first, so it speaks the language of investors. However, the five domains describe any organization. Founders and chief executives use it as a mirror. In other words, this is how a buyer, a board, or a bank will read your company.
If you are ready for a conversation: schedule twenty minutes.
— Brynn
References
- Schultz, T. W. (1961). “Investment in Human Capital.” American Economic Review 51(1): 1–17.
- Becker, G. S. (1964). Human Capital: A Theoretical and Empirical Analysis. NBER / Columbia University Press. Authoritative record.
- Mincer, J. (1974). *Schooling, Experience, and Earnings*. NBER.
- Ployhart, R. E., & Moliterno, T. P. (2011). “Emergence of the Human Capital Resource: A Multilevel Model.” Academy of Management Review 36(1): 127–150.
- Ployhart, R. E., Nyberg, A. J., Reilly, G., & Maltarich, M. A. (2014). “Human Capital Is Dead; Long Live Human Capital Resources!” Journal of Management 40(2): 371–398.
- Crook, T. R., Todd, S. Y., Combs, J. G., Woehr, D. J., & Ketchen, D. J. (2011). “Does Human Capital Matter? A Meta-Analysis.” Journal of Applied Psychology 96(3): 443–456.
- ISO. *ISO 30414:2025 — Human resource management: Requirements and recommendations for human capital reporting and disclosure*.
- Harvard Law School Forum on Corporate Governance. (2025). “SEC’s Spring 2025 Regulatory Flex Agenda Signals a Strategic Pivot.”
- McKinsey & Company. *CEO Alpha: A New Approach to Generating Private Equity Outperformance*.
- Bain & Company. (2026). *Private Equity Outlook 2026: Gaining Traction*.
- AlixPartners. (2026). *Eleventh Annual Private Equity Leadership Survey*.
- Heidrick & Struggles. (2026). *Route to the Top US 2026: Closing the CEO Capability Gap*.
- Deloitte. (2026). *Winning Organizations Will Build the Human Advantage*.
Estimated reading time: 8 minutes