The Leadership Capability Gap Fast-Growth Companies Miss

Your best leaders aren't the problem. What you promoted them into is.

Most of the leaders I work with were promoted because they were good. It's worth saying that because by the time a business starts wondering whether one of their highest potential leaders can really scale, that fact has usually been forgotten. The person who delivered, who could be relied on, who always had the answer - that's who gets moved up. And the promotion is a reward for the job they were already doing well. It rarely prepares them for the one they're walking into.

Because the bigger role isn't the last one done harder - it asks for different things: setting more direction and doing less work, building more people rather than out-delivering them, holding a decision open long enough to think rather than closing it fast to feel in control. That's a different job, and almost nobody is walked across the bridge from one to the other. So a capable person leads the new role with the strengths that earned them the old one. And in time, the strength that got them promoted can be the one holding them back.

What’s Really Happening?

Here's the part that makes it so hard to catch: the work still gets done. These are capable people, so they don't fail, they absorb - they do more themselves, stay closer to the detail, carry the pressure so their team doesn't have to. A senior leader who is struggling rarely looks like they're struggling. They look like they're working harder. So the signals you'd normally trust - delivery, commitment, long hours - are the same ones covering the fact that something underneath isn't working. What you don't have is a read on where they're actually struggling, how they're leading the people beneath them, or what the pressure is doing to their judgement.

The irony of this is, under sustained pressure, most of us fall back on whatever kept us safe before - having the answer, controlling the detail, taking it all on. I've written about what that does to the individual leader in several other articles, so I won't speak to that here. The point for the business is simpler: those protective habits look like effort, so they rarely register as a problem until something downstream breaks. Or they don't register at all - business continues, and your highest potential leaders are struggling on their own and concluding they're the problem. DDI's 2025 Global Leadership Forecast found 71% of leaders report significantly higher stress since stepping into their current role, and 40% of those have considered leaving leadership altogether. Those are your future executives deciding leadership isn't for them, and you rarely find out that's why.

Constant change makes it worse, and most scaling businesses are in constant change. On top of the role, your leaders are making sense of each shift, communicating it, steadying the people unsettled by it, reworking how the team operates, absorbing a new system or structure or set of reporting lines, then doing it again a few months later. Gartner research, reported in Harvard Business Review, found the average employee now goes through around ten planned enterprise changes a year, up from two in 2016, while their willingness to get behind any of it has fallen from 74% to 43%. When people are overwhelmed, the honest human response is to narrow to getting through the day and to buy back time with hours - which reads as dedication and ends in exhaustion, and tells you nothing true about how well anyone is actually leading.

So the business does the reasonable thing with something that appears to be working. It leaves it alone. If it isn't broken, don't fix it. The trouble is that the appearance of coping is exactly what keeps a real problem from being seen. When the strain finally surfaces it's downstream and it looks individual: a decision that keeps getting revisited, an executive team that agrees to align and doesn't, a strong external hire who never quite lands. The instinct is to ask who needs replacing. The more useful question is what never got built. Only 28% of CHROs believe their leaders are adequately prepared to lead change, and managing change is one of the biggest capability gaps they name. And every CEO I speak to feels it, they just can’t place a finger on it without pointing to a particular person. The problem is felt; but where it sits, and what it's costing, at a deeper level, usually isn't.

And that cost is very real, almost invisible and slow, which is why it so often goes untraced.

When business growth outpaces leadership, everything slows down: decisions take longer, execution stalls, and culture thins under a leader holding on too tightly. If executive leadership doesn't notice and fill the capability gaps beneath a struggling leader, your strongest people, the ones with options, are the first to go. It lands on delivery, on engagement and on the P&L, but diffusely enough that it's rarely connected back to its source. I see it time and again with executives in fast-growing organisations: they carry the strain of being the ones who have to fix the problems, address the concerns and keep coaching the struggling leaders beneath them.

So, what can you do?

If what you’ve read so far resonates, it isn’t fixed by swapping people out. The first step is seeing clearly where each leader is genuinely struggling, how they're leading their teams, what the pressure is doing to them, and which of it is a capability you can build rather than a person you have to replace.

That's the work I do - coming into an organisation to diagnose your leadership capability - where the gap actually is, report an external read of it and then work with you to close it. In practice that means spending time with your leaders and the people around them, measuring leadership capability directly and mapping what comes back against what your own data is already telling you - engagement, attrition, promotion effectiveness, succession readiness, where your high potentials are going. What it usually uncovers is the difference between a leader who needs a capability built and one who's being held back by the system around them, and where the strain is concentrated rather than spread. Because you can't close a gap you can't see.

So the question I'd leave a CEO, CPO or a Head of People with isn't which of your leaders can't keep up. It's whether you have an honest read on where the gap actually is, and what it's already costing you in the places you haven't thought to look.

When business growth outpaces leadership, everything slows down - and closing that gap is the work I do at thecuriousleadership.com.

If this resonates for you, schedule a 30 minute call with me to get a high level read and how a leadership capability diagnostic could help your business.