I used to brag about my hours.
Not in an obvious way. I didn't pin a note on my forehead. But I'd drop it into conversations. "Yeah, I was in until nine last night." The slight pause. The nod from whoever was listening. The unspoken agreement: this person is dedicated.
I wasn't being dishonest. I believed it. I thought long hours were proof of something. Commitment. Drive. The willingness to do what others wouldn't.
I was wrong.
The Story We Tell About Hard Work
There's a story baked into most tech workplaces, and plenty of others. It goes like this: the people who leave on time aren't as serious as the ones who stay. The person still at their desk at 8pm cares more. Works harder. Gets further.
It feels true. It looks like dedication. Your manager sees you there. Your colleagues see you grinding. You feel like you're contributing.
But look at what's happening on the other side of the ledger.
The work you produce at 8pm is worse than the work you produce at 2pm. Research from Stanford's John Pencavel showed productivity falls sharply after 50 hours a week. Work 55 hours or more and you get nothing extra for the time... the output disappears into fatigue. The World Health Organization found working 55 or more hours a week raises stroke risk by 35% and heart disease risk by 17%.
You're not working harder. You're working worse, for longer, and hurting yourself doing it.
The Tech Industry's Particular Problem
I spent years in software. The culture is relentless. Startups wear their all-nighters like medals. Hustle is embedded in the language... sprints, crunches, shipping at midnight.
I've seen teams burn themselves to ash and then be surprised when everything caught fire. Engineers making sloppy decisions at 11pm. Bugs introduced in the final push because someone refused to leave a ticket open overnight. Technical debt piling up because the team was too exhausted to write the tests.
The hours were high. The output was poor.
And the worst part? The people who stayed latest were the first out the door when layoffs came. Not because they weren't dedicated... they were, deeply. But dedication isn't what companies measure when the numbers go bad. Output is. Results are. Tired, burned-out people produce less of both.
I know this conversation. The one where you're sitting across from a manager telling someone the company is going in a different direction. And you're thinking: this person works so hard. They were here before me every morning and still here when I went home. And it didn't save them.
Long hours aren't a shield. They're not a store of credit you build up. When the moment of reckoning arrives, nobody counts them.
What Late Hours Tell You
Here's what most managers won't say out loud: when someone consistently works late, it's often a warning sign, not a green flag.
It signals poor prioritization. Work expanded to fill all available time... Parkinson's Law in action.
It signals no clear boundary between what matters and what doesn't. When everything feels urgent, nothing is.
It signals, in many cases, a mismatch between workload and capacity. A management problem, not a dedication problem.
The employee who leaves at 5:30, gets a full night's sleep, and arrives fresh at 9:00am is producing better work on average than the employee who pushed through until 8pm. Research cited by TimeCamp found employees working overtime showed 20% lower productivity compared to those who stopped at end of day.
Twenty percent. The push to prove dedication costs a fifth of your performance.
Most people I know who work the longest hours are the ones with the least clarity about their priorities. Their day is a series of reactions. A Slack message arrives and they respond. Someone drops a request and they take it. They're never quite done because they've never decided what done looks like.
The people I've worked with who leave on time consistently are the opposite. They arrive knowing what they're working on. They make decisions and move on. They protect their attention. They come back the next day with good ideas instead of the fog of exhaustion.
The Skill Nobody Talks About
Leaving on time takes real skill.
It means knowing what you were hired to do. And doing it. It means being able to tell someone no, or not today, or this doesn't belong on my plate. It means spending your working hours on work... not on busywork, not on lengthy meetings, not on the performance of productivity.
It also means having the confidence to be judged on output, not presence. And for a lot of people, it's the terrifying part. What if my manager doesn't see the value I add? What if leaving on time looks like I don't care?
Those are real fears. They speak to something about the culture you're in. If your organisation rewards presence over performance, the problem isn't your hours. The problem is the organisation.
But before blaming the culture, ask yourself honestly: do you stay late because you're expected to, or because you haven't figured out how to be done?
For most of us, it's a bit of both.
If You Manage People, This Is on You
Organisations make leaving on time feel wrong. Your boss sends Slack messages at 9pm. Someone on your team posts an update at 10. The unspoken message: are you still in?
I've been the manager sending those late messages. I'm not proud of it. Without intending to, I was signaling to everyone who worked for me: this is when I expect you to be available. The damage accumulates quietly.
If you want your team doing their best work, leave on time. Do it visibly. Announce it. Stop sending messages after hours. Set up delay-send for anything you write in the evening. Stop rewarding the person who stayed until midnight for hitting a self-imposed deadline. Reward the person who shipped early because they managed their time well.
The culture shift starts at the top. It always does. And leaders who model working reasonable hours don't build lazy teams... they build rested ones. Rested people make better decisions. Better decisions mean fewer crises. Fewer crises mean fewer late nights.
What I Do Now
I leave on time. Not every single day... genuine emergencies are real. But as the default, not the exception.
I plan my day the evening before so I arrive knowing what matters. I protect the first two hours of each morning for deep work, before messages arrive. I write down the three things I'm working on today, in order of importance. If I finish them, I'm done. If I don't finish them all, I know which one to carry forward.
I stop checking messages after 7pm. I close the laptop.
My work is better for it. I'm less irritable. I remember things. I care about the work more, not less, because I'm not running on empty.
I also stopped wearing my hours as a badge. If someone asks what I was up to yesterday, I talk about what I shipped. Not how long I was at my desk.
If you're using long hours as proof of your commitment, I want to ask you one question: what are you afraid people will think if you leave at 5:30?
Whatever the answer is... sit with it. Because the confidence to walk out the door when your work is done might be the most underrated professional skill there is.
What does your current default look like?