Your strongest employee has just saved another customer account. The customer was about to leave, the records were a mess and two colleagues had already tried to sort it out. She rebuilt the history, calmed the customer down and stayed late to close it. The department needs a head, and she looks like the obvious choice. She knows the business, she's dependable, and when something breaks everyone turns to her.
Before you give her the title, ask a harder question. Has she shown that she can manage, or has she shown how much the business depends on her own work? Those are different things, and the first is much harder to see.
A strong senior employee produces excellent work and solves hard problems. A manager has to get reliable work out of other people. A promotion changes what she's measured on, from her own output to her team's.
Why the obvious choice can go wrong
A 2019 study in the Quarterly Journal of Economics by the economists Alan Benson, Danielle Li and Kelly Shue, Promotions and the Peter Principle, looked at sales staff across 131 firms. The firms tended to promote their best salespeople, and the stronger someone's sales record before promotion, the worse their team tended to perform after they took over. That study was about sales jobs, but many founders will recognise the pattern. Being excellent at the work tells you little about whether someone can manage it.
In growing businesses the role often changes only on paper. The new manager keeps the hardest assignments, keeps correcting colleagues' work and keeps rescuing urgent jobs, now with leave approvals and management meetings on top. Her title has changed and the way she adds value hasn't. She gets more tired, the team doesn't get stronger, and difficult work still flows up to her. You've overloaded your best employee and added no management capacity.
Player-coaches are normal
In a business of 20 or 50 people, many managers still do some of the work themselves. A sales manager keeps a few big accounts. An operations manager steps into the difficult jobs. That's fine. The problem starts when their own work is the only evidence that they're performing. Technical work can be part of a manager's job. It can't be all of it.
Four things a real manager can show you
If you want to know whether someone is managing, look for evidence in four places.
The team's result. When a project misses its deadline, a senior employee can reasonably say, "My part was done on time." A manager has to ask why the team didn't deliver. If a manager can tell you how many calls were made but not whether the team hit the target, they're tracking activity.
How the work moves. When a handover fails, a strong senior employee fixes it by chasing the missing information. A manager also asks where it started going wrong and what has to change so it doesn't happen again next week. Gaps between departments are a common place for this to break down, and our article on why hiring managers hasn't reduced your workload looks at them in more detail.
How they handle weak performance. Plenty of people with management titles avoid this part. They hand out tasks, and when someone keeps missing the standard they quietly absorb the work or wait for the founder to step in. A manager doesn't need to be harsh. They do need to set the expectation, say what's falling short and follow up. If their only response to a weak employee is to complain to you, they're supervising.
Whether the team gets stronger. A manager can hit this month's target by doing the hardest work personally. The customer is happy, but ask what changed in the team. Could anyone else handle that problem next time? A manager who stays indispensable to every difficult task is protecting today's quality at the cost of next year's capacity.
An example
Take an insurance brokerage in Kisumu with a customer service team of five. (This is an illustrative example, not a client.) Miriam has run the team for two years and knows the clients better than anyone. When a claim complaint escalates, the team hands it to her. She pulls the file, chases the underwriter and calls the client. From one angle she's an excellent manager, because she protects revenue.
Look at the team instead. After two years, her staff still can't investigate a complaint on their own. What she knows about each client lives in her head and her phone. When she took a week's leave, complaints waited for her return.
Miriam hasn't failed. The business promoted her and then kept rewarding what made her a strong senior employee: personal rescues and individual reliability. Nobody asked her to set up a way of handling escalations or to train anyone, and nobody checked whether she had.
Check the role before you judge the person
If someone is struggling to manage, look at the role before concluding they can't do it. Did you take any of their old work away, or add management on top of a full job? Can they make decisions without your permission, such as approving overtime or changing the rota? And what do you praise and pay for? If their bonus still depends on their personal sales, they'll protect their personal sales.
It's also worth asking whether they wanted to manage at all. In many businesses management is the only route to a pay rise, so good technical people take it for the money. A senior specialist role, with more pay and harder problems but no team, can keep them and their skills in the business.
What this means for your business
Ask yourself about each of your managers: if this person stopped doing the team's hardest work personally, what evidence of management would be left? If the honest answer is "not much", you have senior employees with management titles, and you're probably still doing the managing yourself.
Many founders know what a good manager does. Getting it to happen across every team takes more than choosing the right people. Managers need a role that leaves time to manage, clear expectations for their teams, regular check-ins and a record of what was agreed. Those are what let you see who is actually managing, and they give a new manager something to manage with.
That's the work Talentos does with founder-led businesses. The Performance Picture is a ten-working-day assessment of how performance is actually managed across your business. We hear from leadership and staff, look at the records, and show you where things break down and what to fix first, including whether your managers are set up to manage. You can also start with the free three-minute Quick Picture. If you've already promoted someone and it isn't working, our guide to coaching a newly promoted manager covers the first few months.