What time should a 12 year old go to bed?

Last reviewed: 14 September 2026

Twelve-year-olds need nine to twelve hours and typically get seven and a half. The gap is almost entirely at the bedtime end.

Bedtime chart for a 12-year-old

Find the time your child has to be up, and read across. These bedtimes are lights out, not the start of the evening — they already include about 15 minutes to fall asleep, which is a typical figure at this age.

If your 12-year-old wakes on their own at roughly the right time and is cheerful for the first twenty minutes of the day, the bedtime you are using is working. If they need waking every morning, it is too late — whatever the chart says.

How much sleep does a 12-year-old need?

A 12-year-old needs 9 to 12 hours of sleep a night. The major guidelines agree closely, and all of them give a range rather than a number because healthy children genuinely vary by an hour or more either side.

Why an earlier bedtime stops working

By twelve, the pubertal delay in melatonin release is well established — the signal to sleep arrives one to two hours later than it did at nine. That is why the standard parental response of moving bedtime earlier so often fails: an 8:00 PM lights-out simply produces a 12-year-old lying awake until 9:30 PM, which then becomes an association between bed and not sleeping.

The interventions with the best evidence behind them all work on the clock rather than on the bedtime:

• Fix the wake-up time, seven days a week. A consistent morning anchors the clock far more strongly than a consistent evening. Within an hour of the school time at weekends.
• Get light in the morning. Fifteen minutes outside, or at least curtains open and breakfast by a window. Morning light pulls the clock earlier; evening light pushes it later.
• Protect the last hour. Not because of blue light, mainly, but because a device at 9:00 PM is a device at 10:30 PM.
• Move bedtime in 15-minute steps. If it needs to come forward an hour, that is a month's project, not a Sunday-night decision.

Social media and the 11:00 PM problem

Twelve is when group chats start running late, and the pull is social rather than technological — the fear of missing the conversation is what keeps the phone on, not the screen. Because of that, rules about screen time tend to work less well than rules about where the phone sleeps. A charging point in the kitchen, applied to the whole household, removes the decision from the child.

Signs a 12-year-old is not getting enough sleep

Tiredness in children rarely looks like tiredness. It is far more likely to arrive as behaviour, and the timing is the giveaway — it clusters in the late afternoon and gets worse as the school week goes on.

• sleeping five or more hours later at weekends than on school days
• falling asleep in lessons, or on the bus home
• persistent low mood, irritability or anxiety that is worse in term time
• relying on caffeine — energy drinks in particular — to get through the day

Snoring every night, long pauses in breathing, or persistent mouth-breathing during sleep are different — those are worth raising with your GP rather than treating as a bedtime problem.

A bedtime routine that works at twelve

At twelve the routine is mostly boundaries: a phone that charges outside the bedroom, a homework cut-off an hour before lights out, a fixed wake-up, and morning daylight. Add a short wind-down they choose themselves — reading, music, a shower — rather than one you impose.

Involving them in the arithmetic is genuinely effective at this age. Show them what nine hours before the alarm looks like and let them see how far the current bedtime is from it.

How to move bedtime earlier without a fight

1. Fix the wake-up time first. Same time every day, weekends included, for a week. A stable morning anchors the body clock far more effectively than a stable bedtime does.
2. Move in 15-minute steps. Shift lights out 15 minutes earlier every three or four nights. The body clock will follow that; it will fight an hour.
3. Get daylight into the morning. Curtains open on waking, and ten to fifteen minutes outside before school if you can manage it.
4. End screens before the wind-down starts, not as part of it — stopping something engaging is itself stimulating.
5. Give it a fortnight. Two or three nights tells you nothing. Judge it by how the mornings look after two weeks.