Starting a new job makes it hard to judge whether a manager's sharpness is just a bad week or something more permanent. A boss who micromanages can usually be reasoned with, but a boss who lacks basic empathy can gradually affect an employee's sleep, mood and enthusiasm for the job itself. Career experts point to several early signs that tend to separate an ordinary tough manager from a genuinely toxic one.
Still resentful about the person who left
One early clue is a manager who cannot let go of how a previous employee's departure made them feel. A boss who keeps bringing up a former team member, particularly in a critical way, is often struggling to separate personal feelings from professional outcomes. This kind of comment can also work as an indirect warning to new staff, hinting at unspoken expectations rather than stating them outright.
Quick to take credit, slow to give it
How a manager reacts to success, both their own and the team's, is often revealing. A boss who stays silent when an employee delivers strong work, yet makes their own achievements highly visible, is showing an imbalance worth watching. This pattern is sometimes linked to a narcissistic management style, where recognition flows only in one direction and staff contributions go largely unacknowledged.
Hard to reach when guidance is needed
A new employee should expect some investment from their manager, even if only through regular one-on-ones. A boss who cancels these meetings, avoids feedback conversations, or is simply difficult to get hold of can leave new staff feeling invisible. This can be mistaken at first for a busy schedule, but if the pattern continues, it usually points to a lack of basic managerial engagement rather than a temporary lull.
Colleagues behave differently once the boss appears
The atmosphere in a team can shift noticeably depending on who is in the room. If colleagues speak openly among themselves but become guarded, cautious or silent the moment a manager joins, that shift is a signal worth noting. A related sign is when co-workers avoid discussing the boss altogether with a newcomer, often because they are managing similar concerns themselves.
Clear favourites within the team
Favouritism is one of the more visible signs of a toxic dynamic. This can show up as a manager reassigning promising projects to a preferred employee without explanation, or offering feedback that is vague and personal rather than tied to actual performance. Comments based on a colleague's "vibe" rather than their output are a particular red flag, since they cannot be measured or improved upon.
Sudden changes of direction with no regard for the team
A lack of empathy often surfaces in how a manager handles shifting priorities. A toxic boss may declare a task urgent, mobilise the whole team around it, then abandon it just as abruptly, with little concern for the effort already spent. Repeated over time, this kind of unpredictability leaves staff uncertain about what is actually expected of them, which tends to raise anxiety rather than productivity.
Focused only on deadlines, not development
Some managers measure success purely by whether a task is completed on time, with little interest in how an employee might grow within the role. A supportive manager is expected to discuss what staff need to do their jobs well and how their skills can develop, alongside setting goals and having difficult conversations when necessary. A manager who avoids this kind of dialogue altogether often lacks the conflict-resolution skills needed to build a psychologically safe team.
A growing sense of unease at work
Ultimately, the clearest sign of a toxic manager is the effect they have on how an employee feels day to day. Dreading work only a few weeks into a new role, second-guessing whether a mood or comment was random or deliberate, and gradually speaking up less in meetings are all signals that a manager's behaviour may be having a real impact. Employees experiencing this pattern are often the first to notice subtle changes in their own confidence and openness, even before they can fully name what is causing it.
