# Why do I stay up late when I'm tired?

> If it's past midnight and you're still up, the dishes done and everyone else asleep, your eyes stinging over one more episode, this is the hour that was finally yours. And if it's the morning after and you're a little cross with yourself, how did you sleep, once you got there?

**In short:** Bedtime procrastination[^1], going to bed later than you meant with nothing in the way, is common. The late hour may be there to do a job the day had no room for[^2]. In small trials with students, choosing an ending ahead of time shortened the delay[^3], and you can choose yours this afternoon. Moving a piece of the evening earlier, such as a chapter at lunch, may help too, though it's untested.

It's later than you meant it to be, and your thumb is still moving down the screen. You may not even be enjoying it much, and you probably know exactly what tomorrow will feel like. Still, going up to bed would mean handing back the one part of the day that nobody else had a claim on.

**If you’d like to try something tonight**

You could take a moment, wherever you are, to notice what this hour has been for tonight. It might be rest, a show you love, a conversation or the sense that the day had something of yours in it. Then you could choose an ending for it[^2][^4][^1], the end of this episode or this chapter, and let the evening finish there, on something you picked.

## Why do I stay up when I'm this tired?

It can be puzzling from the inside, to be this tired and still not go. Researchers call it bedtime procrastination[^1][^5]: going to bed later than you intended when nothing outside you is stopping you. They study it apart from the trouble of not being able to sleep once you're there. A survey of Dutch adults found that a large share regularly go to bed later than they'd like[^6]. So the thing you've been scolding yourself for has a name, and researchers who take it seriously.

What sets it apart from other kinds of putting things off is that sleep itself isn't unpleasant. The researchers who first named it suggested[^1] that people aren't avoiding sleep so much as reluctant to stop what they're doing. By the time you could go up, the house is still and the messages have stopped. Going to bed would mean the next thing begins, and the next thing is tomorrow.

So what is the late hour doing for you? Researchers sat down with seventeen Dutch adults who often stayed up later than they meant to. Some said they did it on purpose, because they felt they deserved some time for themselves[^2]; others simply lost track of the hour, absorbed in what they were doing. A trial in Seoul looked at what sixty young adults' late nights were doing for them, and the commonest needs it found[^4] were managing feelings, making up for something the day had lacked and being in touch with other people. Small as these studies are, they suggest the late hour is meeting needs as well as testing discipline. And a need doesn't have to be met only at midnight.

- Then the delay you're living with is in getting to bed, which is what bedtime procrastination describes. Getting to bed late and taking a long time to fall asleep are different things: in a Japanese survey, bedtime procrastination wasn't linked to how long people took to fall asleep[^7], which fits the way you drop off as soon as your head is down.

- In the same Japanese survey, people who stayed up later than they meant also reported more insomnia symptoms[^7]. In interviews, some who called themselves procrastinators stayed up because they believed they needed to in order to fall asleep[^2], which researchers suggest may be insomnia rather than delay. If this sounds more like your nights, [Why am I wide awake at bedtime?](https://nitez.com/awake-at-bedtime) and [Do I have insomnia?](https://nitez.com/insomnia) speak to it more directly.

- Night owls report more bedtime procrastination[^5], and some researchers argue that for them it may be less a choice than a body clock that isn't ready for sleep yet[^8]. Then [What is the body clock, and how does it decide when I'm sleepy?](https://nitez.com/body-clock) is the better piece to start with.

## Is it a lack of willpower?

When bedtime slips again, it's easy to decide your willpower has given out, and the early research wondered the same. The choice to go to bed comes at the very end of the day, after hours of keeping everything going. But why would it be worst on the hardest days? Two diary studies offer one answer. People noted their days and their bedtimes as they went, and those who believed their willpower runs out[^9] put bed off more after stressful days. On easier days, they went up no later than anyone else. A survey of American adults pointed the same way: people who'd spent more of the day resisting temptations delayed bed a little more that night[^10]. The link was small, and a survey like that can't show which led to which.

A diary study of German employees found the opposite. Over a working week, they went up later than they'd planned on evenings when they felt they had more self-control left[^8]. The authors wondered whether, with a little energy to spare, people feel they can afford to stay up. So researchers don't agree yet on how much running low has to do with it.

Either way, this leaves you with a fairer reading of your own evenings. If willpower does run low by night, then a resolution made in the morning will struggle at 11pm through no fault of your character. If it doesn't, the late hour is something you're choosing for reasons of your own, and it's worth finding out what they are.

## Is it the phone that keeps me up?

You may have deleted the apps more than once, or fetched the phone back from the other room, and still the evening goes on. Researchers in Belgium asked young adults about their viewing and their sleep. Binge-watching went with worse sleep and more tiredness, while ordinary television didn't[^11], and a mind still busy at bedtime seemed to account for the link. A survey can't show that one caused the other, though anyone who has let the next episode begin at half past eleven will recognize it.

The light from the screen has an effect as well, though a modest one. After about four hours of reading on a light-emitting e-reader before bed, young adults in a lab took about ten minutes longer to fall asleep[^12] than with a printed book. That's far more screen light than most of us take in on an ordinary evening. In these two studies, what's on the screen, the next episode waiting to begin, looks like the stronger pull and the light like a smaller one, though no study has yet set the two side by side.

**It's revenge bedtime procrastination: taking back the hours the day took from me**

The phrase puts a name to the feeling of reclaiming the evening, and there's some research behind the idea. In interviews, people who often stayed up said they felt they deserved some time for themselves[^2], and in the Korean trial making up for what the day had lacked[^4] was one of the commonest reasons for a late night.

There isn't much research on the phrase itself yet. Only one study so far uses it, a survey of US military servicemembers. It measured ordinary bedtime procrastination and found that people who felt more overloaded at work put bed off more[^13], and its authors suggest the late nights came from too little room in the day for the rest of life[^13]. So the phrase describes how the evening can feel, and the reasons behind it have so far been studied in a demanding military setting that may be far from your own.

## How can I keep my evening and still get to bed?

It may help to begin by noticing what your late hour is for. Once you can name it, you can look for other times when some of it could happen. If it's the only time nobody needs you, one researcher suggests meeting some of that need earlier in the day[^14], through real breaks at work or any stretch you can claim, so it doesn't all have to come out of the night. Nobody has tested this yet. The same researcher warns that cutting evening time away without giving it somewhere may backfire[^14]. If you have children asleep upstairs, someone to care for or a long way home, there may be nothing earlier in the day to claim. Then the small version is still there: a few minutes that belong to you, or a piece of the evening started a little sooner.

However much room the day leaves you, you can choose the evening's ending ahead of time. It's the part that asks least of a crowded day. Because the choice to go to bed comes when you're at your most tired, researchers suggest deciding in advance exactly what you'll do when a set cue arrives[^1][^10], so the moment itself asks for no effort. It could be switching the lamp off when the chapter's done, or getting up for a glass of water as the last song ends. If you miss it one night, it's still there for the next.

Does it work? Two trials with US undergraduates suggest it can: planning ahead like this meant bedtime slipped less for them[^3]. A separate trial in Seoul tried something broader, a whole behavioral program, with sixty young adults: afterward they put bed off about forty-six minutes a night less than people still waiting for the program[^4], so they were going up the better part of an hour before those still waiting.

If you'd like the wider picture, the US sleep medicine societies advise adults to sleep seven hours or more on most nights[^15]. They tie getting less, night after night, to poorer health and performance and to more errors and accidents. [How much sleep do I really need?](https://nitez.com/how-much-sleep) goes into what that means.

**If you’d like to try something today**

Some time today, you could pick one piece of your evening, a chapter, a call or twenty minutes with nothing asked of you, and move it a little earlier[^14]: the chapter at lunch, the call on the walk home. Then you could choose one cue that will close the night[^3][^1], such as brushing your teeth when the call ends, so the decision is already made when the moment comes. If the day has no room in it at all, the cue on its own is enough to start with.

**Who were these studies about?**

Researchers have learned most of what they know about bedtime procrastination from surveys, often of students or of people recruited online. The review that pooled forty-three studies found it goes along with lower self-control and a later body clock[^5], and rated the evidence as low quality[^5]: these are mostly surveys, which can't say which comes first. The willpower survey was of 218 American adults recruited online[^10], who recalled their day afterward, and the binge-watching survey of 423 young adults in Belgium[^11].

The trials are small and short and rely on what people report about their own nights: sixty young adults in Seoul[^4], most of them women around 21, compared with people waiting their turn, and undergraduates in two US trials[^3], who pictured their goal and what got in its way, then made an if-then plan. In a pilot with fifty-five people starting their first careers in Australia[^16], everyone, the comparison group included, cut evening device use by about twenty-three minutes a day and slept about thirteen minutes longer. The e-reader study had young adults reading for about four hours on five evenings in a row[^12], in otherwise very dim light.

The one study of an overloaded working life was of US military servicemembers[^13]. No study yet has looked at parents, carers or people with long commutes, so the findings here come from people whose evenings may look different from yours.

## What if it slips anyway?

Some nights it will run late anyway, perhaps last night, perhaps this one. Researchers asked 218 US adults, recruited online, to think back to the night before, and about a third had gone up later than they meant to[^10]. If you can, you might look at a night like that the way you'd look at a friend's, as an hour that was doing something for you. Early survey evidence, from adults without insomnia, points the same way: people who treated themselves with more self-compassion reported less bedtime procrastination[^17].

So if it's late now and the hour is still going, you might let it finish on something you like, the end of this episode or the song that's playing. Then you could go up while you can still feel the good of it. Tomorrow afternoon can make a little room for whatever tonight was giving you.

## Related questions

- [Why am I wide awake at bedtime?](https://nitez.com/awake-at-bedtime)
- [How do I wind down when I’m tired but wired?](https://nitez.com/winding-down)
- [What is the body clock, and how does it decide when I'm sleepy?](https://nitez.com/body-clock)
- [How much sleep do I really need?](https://nitez.com/how-much-sleep)
- [How do I get through the day after a bad night?](https://nitez.com/after-a-bad-night)
- [Do I have insomnia?](https://nitez.com/insomnia)

## Sources

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https://nitez.com/staying-up-late · Trouble sleeping · updated 2026-08-09