The 30% family business statistic counts a good sale as failure

Around 30% — but that number is doing almost none of the work people think it is. It comes from John L. Ward's 1987 book on Illinois manufacturing companies. It counts a profitable trade sale as a failure. It measures survival through the second generation rather than to it. It spans roughly sixty years, not thirty. And it has no comparison group.

The sequence usually quoted is 30/12/3 — roughly three in ten surviving into the second generation, fewer into the third, fewer still into the fourth. It appears in nearly every succession pitch made in Europe, and it is worth knowing what it actually measured before anybody uses it to make a decision.

Where the number comes from

The source is John L. Ward, Keeping the Family Business Healthy: How to Plan for Continuing Growth, Profitability and Family Leadership, Jossey-Bass, San Francisco, 1987. It was a study of Illinois manufacturing companies.

That is the entire provenance. One book, one American state, one industry, published thirty-nine years ago, now routinely applied to Swiss engineering firms, German Mittelstand suppliers and family retailers across a continent that was politically and economically a different place when the data was gathered.

The four problems, according to the author's own firm

Here is the most disarming fact in this subject. The clearest published correction of the 30% statistic comes from the Family Business Consulting Group — the firm John Ward co-founded. They set out four problems with the way their own founder's number is used.

• It measures continued family leadership and control, not survival. A company sold profitably to a trade buyer counts as a failure. So does an employee buyout. So does a planned, orderly liquidation by owners who decided to stop.
• It is "through" the second generation, not "to" it. Reaching the second generation and surviving all the way through it are different bars, and the figure is quoted as though it were the first.
• The study period spans roughly sixty years, not thirty. The number covers about double the span most people picture when they hear "a generation".
• No comparison group was used. "Only 30%" is a comparison, and no comparison was made. Low against what? The study does not say, because it did not ask.

A statistic that records a profitable sale as a failure is not measuring survival. It is measuring family control, and those are not the same thing.

What the word "failure" is doing in that sentence

Take the first problem seriously for a moment, because it is not a technicality.

An owner sells at a strong price to a strategic buyer, funds the family comfortably, and the company carries on trading under new ownership with the staff intact. In the 30% statistic, that is a failure. A management team buys the business and runs it for another thirty years while the founding family holds property and investments instead. Failure. A family looks honestly at a declining market, winds the company down in an orderly way, pays everybody in full and redeploys the capital. Failure.

Each of those is a decent commercial outcome. Two of them are outcomes I would recommend to some families over a handover. The statistic files them alongside insolvency, and the combined figure is then used to persuade the same families that a handover is the only responsible course. The number is not wrong. It is being asked to answer a question it never measured.

The comparison nobody makes

The fourth problem is the one that changes the conclusion. "Only 30%" implies a benchmark, so let us go and find one.

Daepp, Hamilton, West and Bettencourt published "The mortality of companies" in the Journal of the Royal Society Interface in 2015. The average lifespan of a publicly traded company is around 15 years.

~15 years the average lifespan of a publicly traded company — shorter than a single generational cycle in a family business.

Fifteen years is less time than it takes one generation to hand over to the next. Set against that benchmark, a population of firms of which roughly three in ten remain under family leadership after two generations does not look fragile. It looks unusually durable.

I would rather be exact about the limits of that comparison than let it do more work than it can carry. Listed companies and private family firms are different populations, measured in different ways, and what counts as the end of a company's life is not defined identically across the two. It is not a like-for-like test. But it is a benchmark, which is one more than the 30% figure has ever had, and it points in the opposite direction to the fear that figure is used to sell.

Where the real risk sits

None of this means family succession is riskless. It means the risk has been misdescribed. The strongest evidence points somewhere quite specific, and it is not a generation count.

Bennedsen, Nielsen, Pérez-González and Wolfenzon used Danish administrative data to study CEO transitions and published in the Quarterly Journal of Economics in 2007. Where a family member succeeded the departing chief executive, operating profitability on assets fell by at least four percentage points around the transition.

The identification is what makes that hard to argue with. Families choose their route, so a plain comparison of family-run and outsider-run firms confuses the decision with its consequence: a family may hand to an outsider precisely because the business is struggling. So the authors used something that strongly predicts a family appointment but has nothing to do with how the company is run — the sex of the departing CEO's first-born child. Firms whose first child was a boy were far more likely to appoint a family chief executive, and the sex of a first-born is as good as random with respect to a company's margins, its market or its management.

Estimated that way, the effect came out larger than the simple correlation. The direction of that correction is the part worth holding on to. If the raw comparison had been flattered by families keeping only their easiest businesses in-house, adjusting for selection would have shrunk the estimate. It grew. The correlation was understating the cost, not inventing it.

The finding that tells you what to do about it

Pérez-González, in the American Economic Review in 2006, found on US data that firms promoting family chief executives underperformed on operating profitability and on market-to-book. The important part is where that underperformance is concentrated: in firms whose incoming family CEO did not attend a selective undergraduate institution.

That is a proxy, and a rough one. It records a single filter passed at eighteen, and a great many capable operators never sat it. But as a marker for "this person has at some point been measured against a field of others and came through", it splits the sample in a way that ought to change how families think about the whole question.

The penalty is not attached to being the founder's child. It is attached to never having been chosen. What the data describes is not family ownership failing. It is unselected succession failing — the heir who got the job because they existed rather than because they were preferred over a real alternative. A family that seriously evaluates an outside chief executive is running exactly that comparison, which is a decision with its own consequences, and which produces a genuinely selected successor whichever way it lands.

The present-tense numbers to use instead of a 1987 one

If you want figures that describe succession risk in Switzerland now, there are two, and both are recent.

UBS and the Center for Family Business at the University of St. Gallen surveyed 401 Swiss SME owners in September 2025 and published in January 2026. 168,000 Swiss SMEs will face an ownership transfer by the end of 2030, and approximately 59,000 of those successions are projected to fail over five years. That division is worth doing out loud: 59,000 of 168,000 is 35.1%, implying a realistic completion rate of about 65%.

Dun & Bradstreet Switzerland reported in March 2025 that 13.7% of Swiss firms with up to 249 employees have unresolved succession, equal to 90,667 SMEs. The breakdown by legal form is where it gets interesting.

Swiss firms with up to 249 employees and unresolved succession, by legal form. Dun & Bradstreet Switzerland, 19 March 2025.

Legal form	Share with unresolved succession
Sole proprietorship	19.3%
AG	14.0%
GmbH	9.6%
All firms up to 249 employees	13.7% — 90,667 SMEs

Sole proprietorships run at roughly double the rate of a GmbH. That is not a cultural observation about sole traders. It is a structural one. The less a business is separable from the person who owns it, the harder it is to hand to anybody, and a sole proprietorship is the legal form of maximum inseparability. The same logic runs through everything above: whatever cannot be detached from the owner is the part that does not transfer, and that is where the risk actually lives.

What this means in practice

The 1987 number is used to sell fear, and fear sells process. Plans, charters, family constitutions, governance frameworks, family councils, next-generation development programmes. Each of these can be useful. None of them is what the evidence identifies as decisive.

The evidence identifies two things. First, whether the successor was selected against a real alternative — whether there was ever a moment at which somebody else could have had the job, and this person was preferred on grounds that anybody in the room could state out loud. Second, whether the business was commercially fit at the moment of handover: margins that hold without the owner present, customers held by contract rather than by friendship, growth that came from demand rather than from price indexation.

Neither of those is a document. No family constitution turns an unselected successor into a selected one, and no governance framework repairs a business whose profit is one person's relationships. Both are testable — the first by structuring a genuine choice, the second by looking properly at the numbers — and both are usually skipped, because they are the two conversations a family least wants to have. I have set out what the second one involves in the piece on assessing whether the business is worth taking over, and the timing constraints that decide which routes remain available in the piece on handing over versus selling.

What this cannot tell you

The Danish study is an average across an economy, and averages contain firms that improved under a family successor. The US study covers listed companies, larger and better documented than the businesses most of this is written for. The Swiss figures are survey responses and projections rather than audited outcomes — 401 owners in one, a database analysis in the other — and a five-year projection is a projection. The 15-year company lifespan is not a like-for-like comparator, as I said above.

What none of it tells you is whether your own business would still produce its current operating result if you stopped next year. That is a specific and answerable question about particular customers, particular contracts and particular margins, and it is the only version of the survival question with a useful answer attached.

It is also a question nobody at the table has been engaged to answer. The fiduciary reports the year that has closed. The lawyer drafts what has been agreed. The family consultant improves the conversation. The 30% statistic gets quoted at the start of the meeting to establish urgency, and then everybody proceeds to work on documents — which is precisely the substitution the number was recruited to produce.