Growth Thresholds: What Changes at 10, 50, and 250 Employees

Why growth does not proceed evenly

A business with eight people that grows to twelve is not one and a half times as large; it is a different business. Arrangements that used to happen across the hallway get lost. The owner who knew every order suddenly knows only half of them. New obligations appear that nobody mentioned before. Many owners experience this as chaos and look for the cause in individual people.

This analysis asks: Why do businesses work differently at around 10, 50, and 250 people, and how much of that is due to laws and how much to organization? To answer it, I first clarify the term threshold, then introduce a mental model with Graicunas’s formula, go through the three thresholds one by one, weigh how strongly legal thresholds actually work, and finally derive a threshold check.

A business grows in headcount, but it stumbles over relationships.

What a growth threshold is

By a growth threshold I mean a size beyond which a business can no longer be run with the same means as before. There are two kinds. Legal thresholds arise because laws are tied to the number of employees. Organizational thresholds arise because the number of coordination points and relationships grows faster than the number of people.

The figures 10, 50, and 250 are no coincidence. They correspond to the European Commission’s 2003 enterprise definition: micro enterprises have fewer than 10 employees, small enterprises fewer than 50, medium-sized ones fewer than 250, each combined with limits on turnover or balance sheet total. Many funding programs are tied to this classification. Organizationally, the figures are only reference points. A business with many part-timers or several locations reaches a threshold earlier, one with very well-established processes later.

The mental model: span of control after Graicunas

In 1933, the Paris-based management consultant V. A. Graicunas published a calculation that still appears in organization textbooks today. He asked how many relationships a manager must keep in view when directly leading a certain number of people. His answer distinguishes three kinds: direct relationships with each individual, cross relationships among those led, and group relationships when the manager deals with several at once.

Counting all three kinds, the number does not grow evenly but explosively. The formula is n times (2 to the power of (n minus 1) plus n minus 1). With four direct reports there are 44 possible relationships, with six 222, with eight 1,080. Not every one of them is maintained in daily work, and Graicunas did not intend to calculate an exact workload. But his calculation shows why a manager loses the overview beyond a certain number of people, however hard-working they are.

The model complements two ideas from other articles in this series. The article thinking in roles rather than people shows with Mintzberg (1979) that very small businesses coordinate through mutual adjustment and the owner’s direct supervision, and that neither scales. The essay the owner’s role in a growing business describes with Greiner (1972) how growth ends in management crises. Graicunas provides the calculation for why these crises occur at certain sizes: one person can only directly lead a limited number of people. Once that number is exceeded, the business needs a new level.

The three thresholds in detail

Around 10 people: from calling out to rules

Up to about ten people, the owner can lead everyone directly, and people coordinate among themselves. Beyond that, the number of direct reports exceeds what one person can oversee. The business needs fixed rules for recurring processes, a deputy for the owner, and first areas of responsibility. Legally, the threshold of the German Dismissal Protection Act falls in this range: under section 23 it applies in establishments with more than ten employees, with apprentices not counted and part-time staff counted proportionally. Employees can elect a works council once there are five employees eligible to vote.

Around 50 people: the second management level

If each manager leads five to ten people, a business with 50 people needs a level between owner and team. This fundamentally changes the owner’s role. They lead managers instead of specialists, and information reaches them filtered. The metrics they used to keep in their head now have to be written down so that all levels see the same thing. Legally, among other things, the German Whistleblower Protection Act applies here: since December 2023, businesses with 50 or more employees must have an internal reporting channel, as the analysis whistleblower protection describes.

Around 250 people: functions and procedures

At 250 people, a second level is no longer enough. Functions such as HR, controlling, and purchasing emerge with their own specialists, and many decisions run through procedures rather than people. The danger shifts: it is no longer chaos that slows things down but bureaucracy. Greiner calls this the crisis of red tape. Under the EU definition, the medium-sized enterprise ends here, and for businesses with 250 or more employees the reporting channel obligation already applied from July 2023.

Do legal thresholds slow growth? Two perspectives

The first perspective says: yes, and clearly so. Its strongest evidence comes from France, where many labor law obligations apply from 50 employees. Garicano, Lelarge, and Van Reenen (2016) analyzed data on the entire population of French companies from 1995 to 2007. They show a striking bulge of companies just below 50 employees that does not exist in the United States. According to their model, the rules act like a 2.3 percent tax on labor. The main losers, they find, are workers, and to a lesser extent large companies; the winners are small companies.

The second perspective says: the effect is overestimated. For Germany, Bauer, Bender, and Bonin (2007) used a large dataset linking establishments and employees to examine how changes in the small-business threshold for dismissal protection affected hiring and separations. Contrary to theoretical expectations, they found no statistically significant effects on worker flows. In the 1990s the threshold was raised and lowered again; since 2004 it has stood at more than ten employees.

I consider both findings compatible. In France, many obligations bundle at the threshold of 50, while in Germany they are spread over several thresholds. Both studies also look at the economy as a whole, not the individual business. For an owner, it follows that a legal threshold is a reason to know the obligations in advance, but rarely a good reason to halt growth. If you stop at 49 employees to avoid a reporting channel, you may give up more than you save.

How to tell that a threshold is approaching

Organizational thresholds announce themselves, usually one to two years before they turn into a crisis. The signs are similar across all three sizes; only the level changes.

• Decisions regularly wait for a single person, usually the owner.
• The same questions are asked repeatedly because the answers are written down nowhere.
• New employees take longer than before to work independently.
• Errors arise at handovers between people or teams, not in the work itself.
• Managers directly lead more than eight to ten people.
• The owner only learns about problems when customers complain.

If three or more points apply, the business is probably approaching a threshold. The article does a small business need an organizational chart? helps with the question of when a written structure is useful. For tasks that depend on one person, the guide defining decision paths is the next step.

The threshold check: prepare rather than repair

From the mental model and the findings, I derive a check in four steps. It is worthwhile if the business will reach one of the three sizes within the next two years.

1. Count spans of control

   For each person with management duties, write down how many people they lead directly. Spans above eight to ten indicate a missing level.

2. Check obligations

   With your advisors, list the obligations that come with the next threshold, with effort and deadline. This turns a vague worry into a task.

3. Write down processes

   Record the five most important recurring processes before new people arrive. Onboarding without anything written down ties up the experienced staff.

4. Name the next level

   Decide who should take on the next management level and give that person time to grow into the role before the threshold is reached.

Conclusion: what really makes the thresholds

To the guiding question: businesses work differently at around 10, 50, and 250 people because the number of possible relationships grows much faster than the workforce and because one person can only directly lead a limited number of people. Graicunas calculated this in 1933. At ten people, calling out ends; at fifty, a second management level is needed; at 250, functions and procedures. The legal thresholds lie in similar ranges and reinforce the impression of a leap.

How strongly legal thresholds slow growth is disputed. The French data suggest a noticeable effect, the German data on dismissal protection do not. For the individual business, I consider the organizational thresholds the more important lever, because they affect everyone who grows and because they can be prepared for. For this week, that means: count the spans of control in your business and check which threshold you will reach next.

The sober observation is this: a business rarely fails because of the number of its employees, but because of the number of relationships nobody organizes anymore.