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The meeting that runs over: what the slip costs and when to hold your hard stop

Say your hard stop out loud at the start, then leave on it. An overrun is a late start passed forward, and a 2018 paper of three studies found meetings starting late scored lower on satisfaction and effectiveness, with differences reaching what the groups produced. Leaving at the agreed end costs least when the room heard the time first. This page is about the meeting you did not call, already past its end time, with your own block going. Getting out of the meeting in the first place belongs to the meetings pillar.

What does a meeting running over actually cost?

Eleven fifty-eight, one item left, and whoever is running this says it will only take a minute. It takes nine. Those nine minutes do not come out of the organizer's afternoon. They come out of whatever you had at twelve, which is the part of the arrangement nobody in the room has to look at.

The research that exists measures the other end of the same slip. Allen, Lehmann-Willenbrock and Rogelberg published three studies on meeting lateness in the Journal of Organizational Behavior in 2018, lateness meaning a meeting that begins after the time on the invitation. In an employee sample, lateness was negatively related to both meeting satisfaction and meeting effectiveness. A second study staged the late start with a confederate and found participants expected less of the meeting before it had even run. The third assigned real groups to a 10 minute late, 5 minute late or on-time condition, 16 groups in each, and the differences reached the output: the number, quality and feasibility of the ideas those groups produced.

Take that as a bridge rather than a measurement of your Tuesday. Nobody in those studies timed a meeting past its end. What they timed was the start, and on a calendar of back-to-back bookings the two are one event seen twice, since your meeting running nine minutes over is the next meeting starting nine minutes late for everyone in it. The slip does not stop there. It gets handed on, and whoever hands it on is rarely the person who caused it.

The 2024 follow-up gives your irritation a name. Allen and colleagues put 1,432 working adults from Chile, China, Germany, Italy, the Netherlands and the USA through manipulated scenarios. The late arrival was either the meeting leader or a colleague, the lateness was 5, 10 or 15 minutes, and the question was how frustrated and upset they would be. The framing the authors chose is conservation of resources, which treats lateness as a legitimate stressor: something taken from you, rather than a manner you found rude. They also report that people from cultures with larger power distance and more collectivist orientations read the norm violation more harshly, so what counts as tolerable where you work is partly local.

Your own bill is arithmetic, not feeling. A meeting ending nine minutes late does not cost you nine minutes; it costs what was in the stretch afterwards, and that stretch was already the shorter half of your morning. What is left of it is worth less than the clock claims, for reasons the meetings pillar sets out where it explains why the gaps in a calendar are shorter than they look.

Nobody agreed to those nine minutes.

Is it rude to leave when the meeting was supposed to end?

You know the shape of it. The clock passes the end time, nobody acknowledges it, and standing up now would be the first visibly rude thing anyone has done. That reading is doing a lot of work for a meeting that is already spending time it did not book.

The nearest evidence is about arriving late rather than leaving on time, and it transfers well enough to be worth your two minutes. Mroz and Allen reported an experiment in the Journal of Occupational and Organizational Psychology in 2017. Participants read one of eight vignettes in which somebody arrived 5 or 15 minutes late to an important or unimportant meeting, then gave either a controllable or an uncontrollable reason for it. Readers reported more anger, and more willingness to punish, when the reason was controllable. Sympathy and helpful intentions followed the uncontrollable one. The authors then replicated the pattern with a survey of workers describing the last meeting somebody walked into late.

So the judgment runs on the reason, not on the act. That is the part you can actually set, and it is worth more than any wording you could reach for at the moment you stand up. A hard stop the room heard in the first minute is an uncontrollable reason, because the meeting arrived at 12:03 to find the constraint already sitting there. The same stop first mentioned at 12:03 is indistinguishable from a preference, and a preference is exactly what people score as controllable.

Two limits before you carry any of this into a room. Mroz and Allen measured reactions to a late arrival, and leaving at an agreed end is not the same transgression, so take the direction as the finding and treat the size as unknown. Their vignettes were read, not lived. Ratings collected on a screen are cheap; the colleague you sit next to on Monday is not.

A set of rooms exists where none of this applies and the answer is simply to stay. A client on the call. A meeting called to settle a disagreement you are part of. Or the item still running is the one that binds your work for the next month, and walking out means reconstructing the decision later from somebody's summary. In those, the overrun is the meeting, and nine minutes is cheap.

Everything else is a standing update that has run long.

How do you tell someone you have a hard stop?

One sentence, in the first minute. It costs less than every repair that comes after it.

Name the clock time rather than a vague need to get on, and name what you owe before it. I have to drop at twelve and my part is the second item, so could we take that early. Three facts and a request. The request is the easy yes, because moving an item costs the organizer nothing while the agenda still has room. The practitioner note attached to that 2017 lateness experiment argues the same from the other side, that agendas should stay flexible enough for discussion points to move.

When twelve arrives and your item has not, leave on the sentence you already said. Repeat it once, short: I need to drop here, I will read the notes, send me anything you want from me. Keep the apology shorter than the exit, since a long one reads as an opening offer to stay. Switching the camera off and slipping away without a word is the version that costs you most, because the room then invents its own reason for the empty square, and invented reasons are rarely generous.

A meeting that overruns every week needs a different repair from a meeting that overran once. The weekly one is not an accident and will not be fixed from inside the room, so ask the organizer, in writing, once, for either a longer slot or a shorter agenda. Then hold your own end. Book the work that follows, so your hard stop is an appointment rather than an intention, which is the case Time Blocking makes in general: what holds a slot gets defended, and what does not is available. How much slack a day needs before one overrun takes the afternoon with it is a planning question.

If the meeting is yours to design, the moves belong one page up. The meetings pillar covers them: a length taken from the agenda, the decision taken early instead of last where it competes with the clock, and Timeboxing doing the stopping. A slot booked for an hour tends to use the hour, which that page files under Parkinson's Law as a rule of thumb rather than a measured effect. Most overruns you sit through are not yours to design. That is why this page is about the two minutes around the end time rather than the fifty before it.

How does your working style change the answer?

Which part of this goes wrong depends on how you already work. The four names below are this site's, from the working-style self-check on the home page.

Readers closest to the Architect style have the next block in the calendar already and still sit through the overrun, because the stop was never said out loud, and a block nobody heard about constrains nobody. If that is you, planning is not the gap. Sprinters fail at the other end and find out faster. The stretch after the meeting was the one strong run of their day; nine minutes come off the front of it, and what is left is short enough that it goes on mail.

Visionary-leaning readers lose the most and notice it least. The work they were protecting needs a run at it, so an overrun does not shorten the stretch, it cancels it, and the hour gets written off without anybody deciding to write it off. If you recognize yourself there, saying the stop out loud buys you more than it buys anyone else on this list. It is also the group least likely to bother.

Improvisers handle the room best of the four. Saying it lightly at the start, asking for an item to move, leaving on the sentence: none of that costs them much, and they read a room well enough to know where it will not survive. Their exposure sits after the exit. Nothing was booked into the recovered time either, and an unbooked nine minutes is the easiest thing on a calendar to lose.

So take the next meeting on your calendar that has something of your own directly behind it. Say the time in the first minute. Put the thing that follows into your calendar, where anyone looking can see it, and then hold your stop once. Watch what happens when you go. Most of the time the room notices for about four seconds.

Frequently asked questions

What do you do when a meeting runs over time?

Say your hard stop in the first minute of the meeting, then leave on it when the clock passes the end time. Naming the time early is what does the work, because the reason people judge is the reason they heard first. Ask for your item to be moved up while the agenda still has room to move it. When you go, repeat the sentence once and say where to send anything you owe, rather than leaving silently.

Is it rude to leave a meeting when it was supposed to end?

Much less rude when the room heard your stop before the overrun started, since people judge the reason rather than the act. A 2017 experiment on meeting lateness found more anger, and more willingness to punish, when the late arrival gave a reason they could have controlled, and sympathy when they could not. That was measured on late arrivals rather than early exits, so take the direction as the finding. A stop announced in advance reads as a constraint; the same stop announced as you stand up reads as a preference.

How much does a meeting starting late actually cost?

Enough to show up in what the meeting produces, not only in how the room feels about it. In a 2018 set of three studies, meeting lateness was negatively related to satisfaction and effectiveness in an employee sample. Groups assigned to a 5 or 10 minute late start, 16 per condition, also differed in the number, quality and feasibility of the ideas they produced. A 2024 study of 1,432 working adults across six countries framed lateness as a stressor that takes a resource, not as a question of manners.

How do you tell someone you have a hard stop?

Name the clock time, name the item you need covered before it, and say both in the first minute. I have to drop at twelve and my part is the second item, so could we take that early: three facts and a request, and the request is the easy yes while the agenda still has room. Book the work that follows, so the stop is a real appointment. If the same meeting runs over every week, ask the organizer once, in writing, for a longer slot or a shorter agenda.

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