10 things you should never tell your boss (no matter how much you trust them)

by Lachlan Brown | August 30, 2025, 5:20 pm

Workplaces thrive on trust. A strong relationship with your boss can open doors to promotions, growth, and new opportunities. But here’s the thing: trust has limits—especially in a professional environment.

No matter how friendly or approachable your manager seems, some things are better left unsaid. Oversharing can damage your reputation, shift how they perceive you, or even derail your career in ways you don’t expect.

Below are 10 things you should never tell your boss, even if you feel comfortable with them.

1. “That’s not my job.”

While you should absolutely guard against being taken advantage of, flatly refusing a request can come across as uncooperative. A better way? Reframe. You might say:
“I’m happy to help, but I also want to make sure I’m giving enough time to my core responsibilities. How would you like me to prioritize this?”
This shows willingness without sabotaging yourself.

2. “I can’t work with [colleague’s name].”

Even if you’re frustrated with a coworker, complaining directly to your boss makes you look unprofessional. It suggests you can’t manage conflict on your own. Instead, frame it around the work issue, not the person. For example:
“We have different approaches to this project, and I’d love your advice on aligning.”
That way, you keep the focus on solutions.

3. “I’m only here until I find something better.”

You may dream of launching your own business or moving into a different field, but your boss doesn’t need to know that. If you openly admit you see this job as temporary, they’ll stop investing in you. Training, promotions, and opportunities will be given to someone more committed.

Keep your long-term goals to yourself—share them with friends, mentors, or a career coach instead.

4. “I was out late last night” (or other personal excuses)

Your boss doesn’t need to know you’re tired because you were at a concert, a wedding, or binge-watching Netflix until 3 a.m. It signals a lack of professionalism, even if your performance doesn’t suffer.
If you’re not at your best, focus on delivering your work. Excuses almost always do more harm than good.

5. “I can’t stand this company sometimes.”

Venting about policies, leadership, or the workplace itself may feel cathartic, but to your boss it can sound disloyal—or worse, toxic. Constructive criticism is valuable, but that’s different from venting.
If you truly see areas for improvement, frame them as solutions:
“I think we could improve team morale if we…”
That shows initiative rather than negativity.

6. “That’s not fair.”

Life at work isn’t always fair. Promotions, raises, or recognition don’t always feel evenly distributed. But saying this phrase directly can make you sound entitled.
Instead, ask thoughtful questions:
“Can you help me understand what I can do to position myself for future opportunities?”
This keeps the conversation constructive while still addressing your concerns.

7. “I hate this project.”

Projects you dislike are inevitable. But openly saying you hate it gives the impression you’re difficult, negative, or ungrateful. A more professional approach is to share what challenges you’re facing:
“I’m finding this part of the project draining. Could we brainstorm ways to make it more effective?”
That way, you’re being honest without damaging your reputation.

8. “I need a raise because my bills are high.”

Financial struggles are real, but your boss doesn’t need to know your personal expenses. Raises and promotions should be based on performance, not your rent or childcare costs.
When asking for more money, always tie it to your contribution:
“Here’s the value I’ve delivered, and here’s why I believe my compensation should reflect that.”
Keep it professional and fact-based.

9. “That’s not how we used to do it.”

Change is hard, especially when you’ve been with a company for a while. But resisting change makes you sound stuck in the past.
If you’re skeptical about a new system or strategy, voice your concerns in a forward-looking way:
“I’d like to understand how this approach will help us achieve our goals—can you walk me through it?”
That shows curiosity, not stubbornness.

10. “Between us, I don’t think this will work.”

Confidential venting may feel like bonding with your boss, but it can backfire. If the initiative fails, you’ll be remembered as the person who lacked faith. If it succeeds, you’ll look like you weren’t on board.
Even if you have doubts, frame them as constructive feedback:
“Here are a few risks I see—should we plan for these?”
That way, you demonstrate critical thinking without undermining the team.

Final Thoughts

A strong professional relationship with your boss is built on trust, reliability, and respect. That doesn’t mean you should be fake or robotic—it means you should be mindful of what you share.

The key takeaway? Filter your words. Before speaking, ask yourself: “Will this comment build trust or damage it?” If it’s the latter, keep it to yourself.

You don’t need to overshare to prove you’re authentic. Instead, focus on showing professionalism, competence, and integrity. Over time, those qualities will say far more about you than anything you hold back.

Lachlan Brown

Lachlan Brown is an entrepreneur and co-founder of Brown Brothers Media, a digital publishing network reaching tens of millions of readers monthly. He holds a Graduate Diploma of Psychological Studies from Deakin University, though his real education came afterward: a warehouse job shifting TVs, a stretch of anxiety in his mid-twenties, and the slow discovery that studying the mind is not the same as learning how to live well. He started experimenting with Buddhist principles during breaks at the warehouse and eventually began writing about what he was learning. That writing became Hack Spirit, a widely read personal development site, and his book Hidden Secrets of Buddhism became a bestseller. His work breaks down complex ideas into frameworks people can apply immediately, whether they are navigating a career change, a difficult relationship, or the gap between knowing what to do and actually doing it. Lachlan splits his time between Singapore and Saigon. He writes about high-performance routines, decision-making under pressure, digital innovation, and the intersection of Eastern philosophy with modern life. His perspective comes from having built things from scratch, failed at some of them, and learned that clarity comes from practice, not theory.