There is a pattern I see in almost every fast-growing team I work with.
The company started with a small group of people who knew each other well, moved fast, and trusted each other implicitly. Culture was not something they thought about. It was just how they worked. Decisions got made quickly because everyone was in the same room. Problems got solved informally because everyone knew who to talk to.
Then the company grew. New people joined. The team doubled, then doubled again. And at some point, something changed.
Not the product. Not the revenue. The feeling.
Why culture does not scale automatically
Culture is not a set of values on a wall. It is the sum of daily behaviours: how decisions get made, how conflict gets handled, how information flows, how people treat each other when things get hard.
In a small team, culture is maintained through proximity and repetition. Everyone sees everyone else. Norms are transmitted directly, corrected in real time. The founder's behaviour sets the tone and it reaches everyone immediately.
When the team grows, that transmission mechanism breaks down.
New people join who did not experience the founding period. They did not build the culture. They arrived into it, and they are reading it from incomplete signals. The culture that felt obvious to the people who built it becomes increasingly invisible to the people who joined it. And invisible culture is fragile culture.
What breaking looks like
The breaking of a culture is rarely dramatic. It happens in the accumulation of small moments that go unaddressed.
The first hire who brings different norms and no one names the difference. The first time a decision is made that contradicts a stated value and no one says anything. The first time someone new asks "why do we do it this way" and the answer is "we have always done it this way."
What founders often describe, looking back, is a sense that the company slowly became something slightly different from what they built. Less certain of itself. More political. More careful. Less honest.
The meetings that used to be energetic became careful. The feedback that used to flow became scarce. The shared sense of mission became something written in a document rather than something felt in the room.
What actually needs to happen at fifty people
At ten people, culture maintenance is informal and automatic. At fifty, it requires intention.
The most important structure is honest conversation at the leadership level. The leadership team sets the cultural conditions for everyone below them. How they handle disagreement, how they make decisions, how they treat each other when things are hard: these behaviours are watched and replicated throughout the organisation.
If the leadership team has learned to manage around its tensions rather than through them, the organisation learns to do the same.
The second structure is clarity about what the culture actually is, separate from what it is supposed to be. Most founding teams have an instinctive sense of their culture. They have rarely examined it explicitly. At fifty people, the gap between the instinctive sense and the experienced reality is often significant, and almost always unexamined.
The window
There is a window in the growth of every company where cultural work is most effective: roughly between thirty and one hundred people.
Before thirty, the founding culture is still strong enough to transmit naturally. After one hundred, the culture is established enough that changing it requires significant sustained effort.
Between thirty and one hundred, the founding team still has direct cultural influence. Decisions made about culture in this window have disproportionate impact on what the company becomes at two hundred, five hundred, a thousand people.
Most founding teams do not use this window intentionally. They are too busy growing the company to work on the culture of the company. By the time the cultural problems become impossible to ignore, the window has partially closed and the work is harder.
The best time to work on culture is before it is broken. The second best time is now.
Mees Loman is the founder of Loman Leadership, a leadership coaching practice for founders and leadership teams of fast-growing companies in Amsterdam and beyond. lomanleadership.com