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Cognitive Behavioural Therapy for Insomnia (CBT-I)

If you’ve been struggling with sleep for a while, you may have come across the term CBT-I.


Cognitive Behavioural Therapy for Insomnia, or CBT-I, is the internationally recommended first-line treatment for chronic insomnia. But despite the name, it isn’t simply about changing your thoughts, and it certainly isn’t another list of sleep hygiene rules.


CBT-I looks at the patterns that can keep insomnia going and helps retrain the mind and body for sleep.

What is CBT-I?

Cognitive Behavioural Therapy for Insomnia (CBT-I) is a structured, evidence-based treatment specifically developed for insomnia.

It works with the behaviours, thoughts and physiological responses that can interfere with the natural sleep process.

This is important because insomnia often begins for a very understandable reason. Stress. Illness. Grief. A new baby. Menopause. Pain. Shift work. Travel. A demanding period at work. Sometimes simply a run of bad nights.

But the thing that starts insomnia isn't always the thing that keeps it going.

Over time, we naturally start trying to fix the problem. We may go to bed earlier, sleep in when we can, spend longer in bed, cancel things because we're tired, monitor how much sleep we're getting or start worrying about what another bad night will mean for tomorrow.

The harder we work at sleep, the more attention we can inadvertently give it.

CBT-I helps identify and change the patterns that are now getting in the way of sleep.

Why CBT-I is the 1st-line treatment for insomnia?

CBT-I is recommended internationally as the first-line treatment for chronic insomnia because it addresses the factors that maintain insomnia rather than simply providing temporary relief from its symptoms.

Unlike sleeping medication, CBT-I isn't designed to make you sleep on a particular night. It helps change the underlying patterns around sleep so that your natural sleep system can do its job more effectively again.

For many people, this is an important shift.

The aim isn't to become better at making yourself sleep.

It's to create the conditions in which you no longer need to try so hard.

How does CBT-I work?

When sleep has been difficult for long enough, bedtime can gradually become associated with being awake, thinking, checking, worrying and trying.
You may be exhausted during the day,
only to find yourself strangely alert when your head hits the pillow.
Your brain can effectively learn: bed = awake
At the same time,
 changes to bedtime, wake time, naps and time spent in bed can weaken the natural biological processes that help regulate sleep.
CBT-I works on both sides of this equation.
It helps strengthen the body's natural drive for sleep while changing the learned patterns, behaviours and thinking that can keep the brain alert around bedtime.
Over time,
bed becomes a cue for sleep again,
rather than a place where you try to make sleep happen.

How does CBT-I work?

When sleep has been difficult for long enough, bedtime can gradually become associated with being awake, thinking, checking, worrying and trying.
You may be exhausted during the day,
only to find yourself strangely alert when your head hits the pillow.
Your brain can effectively learn: bed = awake
At the same time,
 changes to bedtime, wake time, naps and time spent in bed can weaken the natural biological processes that help regulate sleep.
CBT-I works on both sides of this equation.
It helps strengthen the body's natural drive for sleep while changing the learned patterns, behaviours and thinking that can keep the brain alert around bedtime.
Over time,
bed becomes a cue for sleep again,
rather than a place where you try to make sleep happen.

What does CBT-I involve?

Understanding your sleep and patterns

You’ve probably already learned a lot about sleep, but there’s also plenty of conflicting advice, rigid rules and misinformation about what “good sleep” should look like.


CBT-I helps separate what is useful from what may be adding pressure. We look at your sleep patterns, health, medications, daytime functioning and expectations to build a clearer picture of what your sleep system actually needs.

Strengthening sleep drive & timing

The timing and amount of time you spend in bed can strongly affect how ready your body is for sleep.


CBT-I helps strengthen sleep drive, improve sleep continuity and support a more consistent sleep-wake rhythm. This may include adjusting bedtime and wake time, reducing excessive time in bed and using sleep compression where appropriate.

The goal is stronger sleep pressure and better timing.

Reconnecting bed and  sleep

When you spend a lot of time awake in bed, the brain can begin to associate bed with thinking, frustration and trying to sleep.


CBT-I helps rebuild the connection between bed and sleep. The traditional idea that “bed is for sleep and sex only” comes from stimulus control, but it doesn’t need to become another rigid rule.

The aim is for bed to become a stronger cue for sleep again.

Working with thoughts about sleep

After enough difficult nights, it’s hard not to start thinking about sleep.


You may calculate how many hours are left, worry about tomorrow or analyse what went wrong the night before.

CBT-I helps you notice these patterns and respond differently, so sleep feels less urgent and less like a problem you have to solve.

The aim isn’t positive thinking. It’s reducing pressure, fear and mental effort around sleep.

Reducing sleep effort and arousal

When sleep has been difficult for a while, it can start to feel like something you have to work at.


You may check whether you feel sleepy enough, try hard to relax or become increasingly aware that sleep still hasn’t arrived.

CBT-I helps reduce that effort and the arousal that goes with it, so you can respond to wakefulness with less urgency and pressure.

The aim is to make sleep feel less like a task.

Helping mind and body let go

Sometimes the problem isn’t tiredness. You can feel exhausted all day, then get into bed and suddenly feel more alert.


Thoughts become louder. The body feels tense or “on”. You start checking whether sleep is coming.


A big part of my work is helping reduce that mental and physical arousal, quieten the mind and move out of problem-solving mode.


The aim is to create the conditions where sleep can happen more naturally, rather than trying to force it.

What does CBT-I involve?

Understanding your sleep and patterns

You’ve probably already learned a lot about sleep, but there’s also plenty of conflicting advice, rigid rules and misinformation about what “good sleep” should look like.


CBT-I helps separate what is useful from what may be adding pressure. We look at your sleep patterns, health, medications, daytime functioning and expectations to build a clearer picture of what your sleep system actually needs.

Strengthening sleep drive & timing

The timing and amount of time you spend in bed can strongly affect how ready your body is for sleep.


CBT-I helps strengthen sleep drive, improve sleep continuity and support a more consistent sleep-wake rhythm. This may include adjusting bedtime and wake time, reducing excessive time in bed and using sleep compression where appropriate.

The goal is stronger sleep pressure and better timing.

Reconnecting bed and  sleep

When you spend a lot of time awake in bed, the brain can begin to associate bed with thinking, frustration and trying to sleep.


CBT-I helps rebuild the connection between bed and sleep. The traditional idea that “bed is for sleep and sex only” comes from stimulus control, but it doesn’t need to become another rigid rule.

The aim is for bed to become a stronger cue for sleep again.

Working with thoughts about sleep

After enough difficult nights, it’s hard not to start thinking about sleep.


You may calculate how many hours are left, worry about tomorrow or analyse what went wrong the night before.

CBT-I helps you notice these patterns and respond differently, so sleep feels less urgent and less like a problem you have to solve.

The aim isn’t positive thinking. It’s reducing pressure, fear and mental effort around sleep.

Reducing sleep effort and arousal

When sleep has been difficult for a while, it can start to feel like something you have to work at.


You may check whether you feel sleepy enough, try hard to relax or become increasingly aware that sleep still hasn’t arrived.

CBT-I helps reduce that effort and the arousal that goes with it, so you can respond to wakefulness with less urgency and pressure.

The aim is to make sleep feel less like a task.

Helping mind and body let go

Sometimes the problem isn’t tiredness. You can feel exhausted all day, then get into bed and suddenly feel more alert.


Thoughts become louder. The body feels tense or “on”. You start checking whether sleep is coming.


A big part of my work is helping reduce that mental and physical arousal, quieten the mind and move out of problem-solving mode.


The aim is to create the conditions where sleep can happen more naturally, rather than trying to force it.

Frequently asked questions about CBT-I

Is CBT the same as CBT-I?

No. CBT is a broad form of psychological therapy used for many different concerns. CBT-I is a specific treatment developed for insomnia.

While CBT-I draws on cognitive and behavioural principles, it also works directly with the biological and learned processes that regulate sleep, including sleep drive and timing, the association between bed and wakefulness, and the effort and arousal that can develop around sleep.

Someone trained in CBT is therefore not automatically trained in CBT-I. CBT-I requires additional, specific training in insomnia and its treatment.

Is CBT-I just sleep restriction?

No. This is probably one of the biggest misconceptions about CBT-I.

Adjusting the amount of time you spend in bed can be one part of treatment, but CBT-I is much broader than that. It also works with sleep timing, the connection between bed and sleep, thoughts and worries about sleep, sleep effort and the arousal that can keep you awake.

And it shouldn’t be a one-size-fits-all approach. Depending on the person, I may use a more gradual approach such as sleep compression rather than more restrictive sleep scheduling.

Is CBT-I the same as sleep hygiene?

No. If you’ve had insomnia for a while, chances are you already know plenty about caffeine, screens, exercise, bedroom temperature and keeping the room dark.

Those things can support healthy sleep, but they don’t usually address what is keeping chronic insomnia going.

CBT-I goes much deeper. It looks at the patterns that have developed around your sleep and works directly with the biological, behavioural and psychological processes that can keep you awake.

How long does CBT-I take?

CBT-I is designed to be a relatively short-term treatment, but there isn’t one number of sessions that is right for everyone.

Some people begin to turn a corner quite quickly. Others have had insomnia for years or have several things contributing to their sleep difficulty and need more time.

I prefer to start by understanding what is happening with your sleep, then recommend an approach based on what you actually need rather than putting everyone through the same fixed program.

What is BBT-I?

BBT-I stands for Brief Behavioural Therapy for Insomnia.

Think of it as a more streamlined version of insomnia treatment that focuses on some of the key behavioural strategies used in CBT-I, particularly sleep timing, strengthening sleep drive and rebuilding the connection between bed and sleep.

For some people, that may be enough. For others, particularly where thinking, worry, sleep effort or heightened arousal are a big part of the problem, a broader CBT-I approach may be more appropriate.

Do I need a sleep study before CBT-I?

Usually, no.

Chronic insomnia is generally assessed by looking closely at your sleep history and patterns, health and medications, daytime functioning and what happens around sleep. A sleep diary and some screening questionnaires can also give us useful information.

If something in your symptoms suggests another sleep disorder may be involved, such as obstructive sleep apnoea or restless legs syndrome, I’ll recommend appropriate medical assessment rather than trying to treat everything as insomnia.

Can I do CBT-I while taking sleeping medication?

Yes, in many cases you can.

You don’t need to stop sleeping medication before starting CBT-I, and I would never ask you to suddenly stop medication that has been prescribed for you.

If reducing or stopping medication becomes something you want to explore, that decision should be made with the doctor or healthcare professional who prescribed it. CBT-I can continue alongside that process.

Who can provide CBT-I?

This is an important question, because CBT-I is sometimes described as something that can only be provided by a psychologist.
That isn't the full picture.

International sleep research and clinical practice recognise that CBT-I can be delivered by appropriately trained professionals from a range of healthcare disciplines. What matters is not simply the professional title someone started with. What matters is whether the practitioner has:

  • specific education and training in insomnia and CBT-I
  • an understanding of sleep and sleep disorders
  • appropriate clinical and therapeutic skills
  • the ability to recognise when insomnia may not be the only problem
  • clear professional boundaries and scope of practice
  • appropriate referral pathways
  • ongoing professional development and, where appropriate, supervision.

This doesn't mean that anyone who calls themselves a sleep coach is qualified to treat insomnia. Nor does it mean that all sleep problems can or should be treated outside medicine or psychology.

It means that the right practitioner depends on the sleep problem in front of them.
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