The advice for dealing with difficult coworkers usually assumes something you don’t have: the upper hand. Pull them aside. Set clear expectations. Escalate if it continues. That’s manager advice, and it’s fine advice if you’re the manager. When the difficult coworker is your peer, you can’t set expectations for them, you can’t manage them out, and going over their head too early makes you look like the problem. You have exactly as much authority as they do, which is none. Every day you still have to sit near them, share a project with them, and get your own work done anyway.
That’s the situation this piece is about, and it changes everything. The cost of leaving it alone is real, though. SHRM’s incivility research found that U.S. organizations lose more than $2.7 billion a day to lost productivity and absenteeism from rude, dismissive, difficult behavior at work. Very little of that is dramatic. It’s the credit-taker, the person who never replies, the one who needs the last word.
Amy Gallo’s Getting Along mapped the archetypes of difficult people and the tactic for each, and it’s the best-known guide out there. It mostly assumes you can use position, reach HR, or lean on a manager to make the tactic stick. This piece assumes you can’t. Every move below is one a peer can make with no authority at all. That constraint drives everything below.
Difficult coworkers vs. toxic ones: know which one you have
Before any of this, sort the behavior into one of two buckets, because they need opposite responses.
| Coachable friction | HR-level toxicity |
|---|---|
| Annoying, avoidable, about the work | Harassment, discrimination, bullying |
| Takes credit, misses deadlines, won’t reply | Slurs, threats, unwanted touching, retaliation |
| A direct conversation can shift it | A conversation won’t fix it and can make you less safe |
| The moves below apply | Go to HR or your manager now |
Everything in this article is about the left column. If you’re in the right column, close the tab and talk to HR or your manager today. Do not have a conversation with the person first. That’s not a coaching problem, and treating it like one puts you at risk. People misfile constantly in both directions: they tolerate genuine harassment because they don’t want to seem dramatic, or they run to HR over a coworker who’s merely irritating. The test is simple. Ask whether skill and a good sentence could plausibly change the behavior. If yes, it’s friction. If the behavior is designed to demean, exclude, or intimidate, no sentence fixes that. Handling a difficult peer well is really applied conflict resolution, the kind you do sideways instead of from above. The rest is toxicity, and it belongs to someone with the power to act on it.
The coworker who takes your credit
The idea you floated last week comes out of Dave’s mouth in the meeting as his own. Or the deck reaches leadership with his name where yours should be.
The move is to name your contribution in writing, in the moment, as a fact rather than a grievance. In the thread or right after the meeting, reply where everyone can see it: “Glad the tiering model landed well. Happy to walk anyone through how I built the logic, since I put that together last week.” It reads like calm context, and it puts your ownership on the record while the moment is still live. Do it calmly and often enough that the pattern shows.
(If you manage the team, you can credit people yourself in the room, which is a lever a peer doesn’t get.)
Stop coaching it when the credit-taking is a repeated pattern that’s shaping how your work gets evaluated. One stolen idea is friction. A quarter of your contributions rebranded as someone else’s is a career problem. At that point, bring dated specifics to your manager.
The coworker who’s always late
Rachel’s piece is the one holding up the chain, every time. You’ve asked nicely. It keeps slipping, and now your deadline is the one at risk.
Stop chasing the person. Make the dependency visible to whoever owns the deadline. Post it in the shared channel instead of a private nudge: “Flagging that the design review can’t start until the copy lands, which is due Thursday. If that date moves, the launch moves with it.” Framed around the deadline instead of the person, it surfaces a cost the owner needs to see, which reads very differently from tattling. The deadline applies the pressure so you don’t have to.
Escalate when repeated misses start hurting clients or your own record. Then it goes to the person who owns the outcome, with dates attached.
The passive-aggressive coworker
“Must be nice to leave at 5.” The heavy sigh. “No, it’s fine, I’ll just do it myself.”
Respond to the literal words and let the subtext go unanswered. Take the sentence at face value and answer it plainly. To “must be nice to leave at 5,” you say: “It is, thanks. Anything you need from me before tomorrow?” The dig only works if you react to what was implied. Answer what was actually said, warmly, and the bait has nowhere to land. You’re not pretending you missed it. You’re choosing not to feed it.
This one stays firmly in the friction column. It leaves that column when the jabs turn into public put-downs or targeting that follows you around the office. That’s not a communication style anymore. Document it and take it up the chain.
The know-it-all who steamrolls the room
Greg announces the migration will break everything, and the room folds because he says it with total certainty.
Don’t argue the whole claim. Ask one narrow question that forces a testable version of it. “You said the migration breaks the API. Which endpoint specifically, so I can check it before the call?” A sweeping assertion shrinks fast when it has to become a single falsifiable detail. You’re asking him to make the claim checkable, which is harder to push back on than a flat disagreement. Half the time the certainty quietly evaporates on its own.
Loop in your manager when the steamrolling turns into dismissing your work in ways that dent your standing with people who matter.
The coworker who complains about everything
Every coffee break, every standup, Karen has a fresh grievance and zero interest in fixing any of it. Her mood becomes the room’s mood.
Redirect the venting to one concrete next step. Not “stay positive,” which reads as dismissive and makes it worse. After you acknowledge the frustration, ask: “That sounds rough. What’s the one thing you’d change first if it were up to you?” You’re pointing the energy at a single action instead of letting it pool. Some people take the question and run with it. Others go quiet, because the complaint was never meant to be solved, and that’s useful to learn too.
The line to watch: when constant complaining shifts into spreading damaging stories about specific people. That’s a different problem than venting, and a bigger one.
The coworker who ignores your boundaries
Tom pings you at 9 pm expecting a reply, drops work on your desk that isn’t yours, assumes your Saturday is available.
State the boundary as a fact about your availability, full stop. Don’t ask permission to have a limit. Say it the way you’d state a schedule: “I’m offline after 6, so I’ll pick this up first thing tomorrow.” No apology, no long justification. A fact doesn’t invite a counteroffer the way a request does. Say it the same way every time, and the expectation resets itself without a confrontation.
This stays in the friction column right up until the boundary-crossing turns personal, physical, or sexual. At that point none of the above applies. That’s HR, now, and you skip the conversation entirely.
The coworker who CCs your boss to win
The disagreement is ordinary, until Paul copies your manager on his reply to make the point land harder. Now it’s a performance for an audience.
Loop your boss in yourself, first, with the same information and no ambush. Before it can become a surprise, send the neutral version: “Quick heads up: Paul and I are working through a difference on the timeline. Here’s where it stands, nothing needed from you yet.” Once you’ve framed it calmly and factually, his dramatic CC just looks like noise on top of a situation that’s already handled.
(A manager can simply tell both people to drop the CC theater. A peer has to route around it.)
If it becomes a habit of trying to make you look bad to leadership, take it to your manager directly, with the thread as evidence.
The coworker who never replies
Two emails, no answer, and you’re blocked on Nina’s sign-off with a deadline of your own bearing down.
Switch the channel and attach a deadline with a default action. Move off email to wherever they actually look, and make silence cost something. A Slack message: “Sent you a note on the budget numbers. I need your sign-off by Thursday noon, or I’ll move ahead with the current draft.” The deadline plus a default means their silence stops being your problem and starts being theirs. You’ve given them a real choice and a clear consequence, without a single sharp word.
(If you’re the manager, an unanswered request becomes a performance conversation, no channel-switching required.)
When the silence is deliberate stonewalling that keeps blocking your work, make it your manager’s job to unblock. You’ve documented the attempts, so that conversation is easy.
Where this approach runs out
These moves work on difficult people. They don’t work on hostile ones. A difficult coworker is careless, insecure, or annoying, and responds to being handled with a bit of skill. A hostile one is actually trying to hurt you, and polish just hands them a cleaner target. Reading the difference between a bad week and a hostile pattern is its own skill, closer to emotional intelligence in conflict than to any single tactic.
The whole approach also assumes a working escalation path: a manager who will listen, an HR function that acts. If you don’t have that, the math changes, and protecting yourself matters more than finding the perfect sentence. Which move fits also depends on you, since your own conflict resolution style shapes what you can actually pull off under pressure.
And if you do have authority over the person, most of this gets simpler. You can name the standard instead of just the dependency. You can make the deadline an expectation instead of a request. The indirect moves here exist precisely because you can’t do that. When settling the disagreement itself matters as much as managing the person, that’s a step up into conflict resolution at work.
The hardest part is rarely knowing the move. It’s saying the sentence out loud when your pulse is up and the other person is right there. You can rehearse the conversation with Merlin first, out loud, before you have it for real. These are the everyday skills built for individual contributors who lead through influence, without the title to back it up. Pick the one coworker who’s been draining you, choose the one move, and say it this week.