5 signs you might be a toxic co‑worker

We all like to think we’re the “easy to work with” one—the one who gets the job done, shows up, and keeps things light. But sometimes, without realising it, our habits and attitudes can quietly make work harder for others. Toxicity at work doesn’t always look like tantrums or obvious cruelty; it’s often the quiet stuff: gossip, passive aggression, credit‑snatching, and constant negativity. If you’re worried you might be the problem rather than the solution, getting honest with yourself is the first step. The good news? Recognising these patterns means you’re already halfway to becoming a better, more supportive colleague.

If you’re often the one passing on “I heard this about X” or “No one’s saying this, but…” you might be the office gossip. Gossip creates tension, spreads misinformation, and makes people defensive instead of collaborative. It also makes trust fragile—people start watching what they say around you, which kills open communication. If your conversations gravitate toward other people’s private lives, mistakes, or drama, it’s time to pause and ask yourself: “Would I be okay if this was said about me?” Shifting to neutral, positive, or work‑focused topics helps rebuild trust and makes you someone others feel safe around.

If you’re the person who treats every team victory like a solo performance, you’re playing a high-stakes game with your reputation. It feels great to be the "star" during a big presentation, but when you erase the people who did the heavy lifting, you’re burning bridges you’ll eventually need to cross. Trust is the primary currency of any office; once you spend it by hoarding credit, it’s incredibly hard to earn back. Real influence comes from being the loudest person in the room when it's time to praise someone else. Switch "my" to "our," and watch how much faster people show up for you.

We all have those Mondays where the workload feels like a dumpster fire, but if your default setting is a cynical sigh, you might be the team’s resident joy-killer. Constant negativity isn’t just a personal mood; it’s contagious. It drains the creative energy out of meetings and makes your teammates feel hopeless about making improvements. There’s a massive difference between being a "critical thinker" and just being a "complainer." If a process is broken, bring a suggestion to the table instead of just another eye-roll. Protecting the team’s morale is just as important as hitting your KPIs.

Nobody likes working with someone who manages to let every mistake slide off them and onto someone else. Whether you’re blaming a "glitchy" piece of software or a "miscommunication" from a junior designer, dodging the bill for your errors just makes you look insecure. In reality, accepting your mistakes and giving solutions is a power move. It shows you’re mature enough to prioritize the project over your own ego. When you own your mess-ups, you give everyone else permission to be human, too. Honesty is the fastest shortcut to real respect.

Toxicity often hides in subtle behaviour: interrupting frequently, finishing others’ sentences, “forgetting” to loop someone in on emails, or subtly questioning their competence in meetings. These micro‑actions chip other's confidence and create a sense of exclusion. If you’re the one people feel they have to “be careful around,” or if you’re often the last to know about decisions, it might be a sign that your behaviour is pushing people away. Becoming more aware of how you listen, respond, and include others—such as letting them speak fully, giving credit, and actively looping them in—turns your impact from harmful to helpful, and helps you become the kind of co‑worker people genuinely want to work with.