‘What's an unwritten office rule everyone learns the hard way?’: Employees discuss workplace habits they only got to discover because of a mistake they made.

Author image for María Cetra
María Cetra • Writer
Jul 20, 2026 6:00 PM EDT

Do you remember that mistake you committed in your first corporate job that made you realize that in every office there are something called "unwritten rules"? Well, today is the day to go back to the memory lane and revival that stories.

In every office, there are some rules that everyone working there knows, but they are never said aloud. The only reason you discover them is because of a mistake you commit that causes you to learn the rule. I think that everyone who works on-site in an office knows exactly what I'm talking about. Especially if they are familiar with the office kitchen. What a place, full of gossip, mixed-up lunches, and loud people. That is the main space of the office, where the real unwritten rules are. Some of them are obvious, such as not touching anybody's food, don't eat something you didn't bring, and clean the utensils after you use them. 


But the real fun starts when you find the not-so-obvious ones, such as the table where you can't sit at 12 o'clock because some people of the marketing department have it "reserved", or that the microwave can't heat your food if the bathroom light is on. Those weird things that nobody realized when they started being like that but now everyone accepts as the truth. In the thread below they are a lot of examples of this second group, the weird, not-so-expected, unwritten rules. 


I remember when I worked at my first office job, I didn't know this was a thing. I sat where I wanted, took the salt from the shelf thinking it was communal, and used the utensils from the office kitchen without bringing ones from home. That last one may feel like normal. Well, little did I know that there was this kind of unwritten rule that some people in the office had priority over the utensils, as we were extremely low on forks, so hire-ups and managers expected new hires to bring their own utensils to have lunch. Not a good thing to find out when you took the last fork from the kitchen. But, well, to these kinds of rules, you have two ways of acting. Either you fight back, or you just comply. In my experience, complying is always better to avoid arguments when you have just been hired. 
 

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  • What's an unwritten office rule everyone learns the hard way?

     

  • 01
    Every workplace has habits that never appear in the employee handbook. What's one office rule you only learned after making a mistake?
    via No_Word_2405
  • 02
    A couple of friends sharing food, sitting together, and talking.
    via Toa Heftiba

    A couple of friends sharing food, sitting together, and talking. 

    Representation. 

  • 03
    Lufty_262 Never confide in a coworker. Particularly about projects, movement, or aspirations.
    via No_Word_2405
  • 04
    Visible_Pizza_3865 Being likeable is more important than being competent
    via No_Word_2405
  • 05
    vicismael Always be aware that a coworker can become your boss or subordinate in the future
    via No_Word_2405
  • 06
    saotomesan There are three people in the office you should always always be friendly with: the front desk person / admin person / assistant, the office manager, and the IT person.
    via No_Word_2405
  • 07
    Still-Butterscotch33 Don't microwave fish
    via No_Word_2405
  • 08
    Model image of a kitchen in an office.
    via Petr

    Model image of a kitchen in an office. 

  • 09
    BratacJaglenac Do not volunteer to do anything outside of your official designation and scope, it will backfire.
    via No_Word_2405
  • 10
    Regular-Pangolin-790 Make friends with IT, Receptionists and head Admins. You'll never go without. Helps if you bring them a small treat here and there.
    via No_Word_2405
  • 11
    hetkleinezusje Never steal other people's lunches. Don't sh where you eat. Office relationships ALWAYS end badly. The most powerful person in the office probably isn't who you expect. It's more than likely the administration officer / secretary / executive assistant. her off and your life won't be worth living. Keep her onside and your way will be miraculously smoothed -even through f ups.
    via No_Word_2405
  • 12
    ExcaliburVader Don't say the first thing that pops into your head. And if your edit button is as bad as mine, don't say the SECOND thing that comes to mind.
    via No_Word_2405
  • 13
    Low Breakfast773 You should proactively appear super busy all the time if you wanna climb that career ladder.
    via No_Word_2405
  • 14
    WyvernsRest Loyalty is shown by what you say about people when they are not in the room.
    via No_Word_2405
  • 15
    Rough-Improvement-24 Never trust your co-workers because office gossip is a real thing and people use whatever they can if it means they get an edge over someone else.
    via No_Word_2405
  • 16
    TheMetalSheep Your coworkers are not your friends.
    via No_Word_2405
  • 17
    Regular-Pangolin-790 If you take initiative on anything, tell them! Not in a braggy way, but make sure they know it every time you do it. Also, it may feel good in the moment to complain about a colleague but this never goes in your favor! Speak well of the colleagues you do respect!
    via No_Word_2405
  • 18
    Lufty_262 Never let a coworker "fix" anything for you. A bike, a car, something in your home, etc. In addition, never take advice from a coworker on anywhere that fixes things either. An auto mechanic, a contractor, a tailor, etc. When either goes badly, and you mention it, you just made a perma- enemy.
    via No_Word_2405
  • 19
    pborenstein Your boss is not your boss because they know your job better than you do. Your boss is your boss because they know their boss better than you know your boss.
    via No_Word_2405
  • 20
    BeachBound Butterfly the managers/execs/leaders REALLY DON'T want your honest feedback, or for you to find holes in the organization. They want YES people who won't "rock the boat" or highlight discrepancies if it makes their ideas look bad, or even if it will cause profits to drop. They'd rather the whole place burn down than to hear they're wrong about something, or the problems that will arise.
    via No_Word_2405
  • 21
    andmen2015 I wouldn't say it's an unwritten office rule. But decades ago I decided to separate my personal life from work life and it cut way down on drama. I'm not here to make friends, I'm here to work and make money for me and my family. If I make some friends along the way that's great, but they will never be the kind I share private stuff with.
    via No_Word_2405
  • 22
    Personal Signal_6151 An old etiquette rule but it needs to come back. Never discuss money, rel_ion, or politics. I look forward to the day when politics, vaccines, etc are not so divisive that families are split apart.
    via No_Word_2405
  • 23
    Dogmund Before writing an email where you may have to call someone out for poor behavior/performance, complain to your boss, or say anything negative, do not address it. leave it in your draft file for at least 24 hours. If nothing else you may find that you will need to reword it.
    via No_Word_2405
  • 24
    lifeisabeach28 Appear to play the corporate game even if you don't really care. People who openly complained or pushed the boundaries of RTO were most of the ones laid off the in the new year. You end up with a target on your back if you aren't "rah, rah go company", so just play the game a little bit if you don't want to end up unemployed.
    via No_Word_2405

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