What Is CBT-I? A Simple Guide to CBT-I for Insomnia

Sep 29

9 min read

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

CBT-I stands for Cognitive Behavioural Therapy for Insomnia.

Sounds complicated.

It really doesn’t need to be.

CBT-I is a treatment specifically designed for insomnia. It helps us understand what might be keeping your sleep problem going and then uses simple, evidence-based strategies to help your natural sleep system work better again.

It works with things like your need for sleep, your body clock, your sleep habits and the worry or pressure that can build up around sleep.

It isn’t about forcing yourself to sleep.

It isn’t about creating the perfect bedtime routine.

And it definitely isn’t just someone telling you to put your phone away and stop drinking coffee.

It’s about understanding your sleep and working with it.

What is the difference between CBT and CBT-I?

This gets confused a lot.

CBT and CBT-I are not the same thing.

CBT stands for Cognitive Behavioural Therapy. It can be used to help with lots of different difficulties.

CBT-I stands for Cognitive Behavioural Therapy for Insomnia and is specifically focused on sleep and insomnia.

There is some overlap, particularly when we look at thoughts, worries and behaviours.

But CBT-I also looks directly at your sleep.

Things like:

What time are you going to bed?
How long does it take you to fall asleep?
How much time are you spending awake in bed?
What time are you getting up?
Are you napping?
What happens when you wake during the night?
Have you started worrying about sleep?
Are you trying really hard to make yourself sleep?

So if you’ve had CBT before and it didn’t help your sleep, that doesn’t necessarily mean you’ve tried CBT-I.

They are different approaches.

How does CBT-I help insomnia?

To understand why CBT-I can help, we first need to understand something about insomnia.

The thing that starts a sleep problem isn’t always the thing that keeps it going.

Maybe your sleep changed because of stress.

Illness.

Hormones or menopause.

Pain.

Grief.

Work.

Having children.

Anxiety.

A big life change.

Or perhaps you don’t really know why it started.

But after enough bad nights, something very normal happens.

You start trying to fix your sleep.

You might go to bed earlier because you’re exhausted.

Stay in bed later because you need to catch up.

Nap.

Cancel things.

Watch the clock.

Check your sleep tracker.

Google how many hours you should be getting.

Or lie in bed thinking:

“Come on. I HAVE to sleep.”

It all makes complete sense.

The problem is that some of the things we do to try to get more sleep can accidentally make sleep harder.

Then we can get stuck in a loop:

Poor sleep → trying harder to sleep → more worry and more time trying → sleep becomes harder → even more effort.

CBT-I helps us break that loop.

What happens during CBT-I?

CBT-I isn’t one single technique.

There are different parts to it, and we use them together depending on what is happening with your sleep.

Here’s the simple version.

1. First, we understand your sleep

Before changing anything, we need to know what your sleep is actually doing.

We might look at:

When do you go to bed?

When do you actually fall asleep?

How often do you wake?

How long are you awake during the night?

What time do you get up?

Do you nap?

How much sleep are you actually getting?

We’re not looking for perfect numbers.

We’re looking for patterns.

Because once we understand your sleep pattern, we can start working out what might be keeping the problem going.

2. We work with your body clock

Your body has an internal clock.

You might also hear this called your circadian rhythm.

Its job is to help your body know when it’s daytime and when it’s nighttime.

One of the simplest ways we can support your body clock is by looking at your morning.

Getting up at roughly the same time and getting daylight early in the day gives your brain a really clear signal:

“Morning is here.”

And when your brain has a strong daytime signal, it becomes easier for your body to understand where nighttime belongs too.

This is why I often say:

Wake time first.

3. We build your need for sleep

I call this sleep pressure.

Think of sleep pressure a bit like hunger.

When you first wake up, your need for sleep should be fairly low.

The longer you stay awake, the more that need for sleep builds.

By nighttime, we want enough sleep pressure behind you to help sleep happen.

This is also why spending more time in bed doesn’t necessarily mean more sleep.

If you’re sleeping for six hours but spending ten hours in bed trying to get eight, those extra hours in bed might actually make your sleep more broken.

Sometimes we need to do the opposite of what feels logical.

Spend a little less time trying to sleep so that the sleep you are getting becomes stronger.

What is sleep restriction in CBT-I?

This is probably one of the most misunderstood parts of CBT-I.

You may hear something called sleep restriction therapy.

And, quite frankly, the name doesn’t make it sound particularly appealing.

The aim isn’t simply to restrict your sleep or make you sleep deprived.

We look at how much time you’re spending in bed compared with how much time you’re actually sleeping.

We can then bring those two things closer together.

I often prefer to think about this as sleep compression.

For example, if you’re spending a very long time in bed but only sleeping for part of it, we may gradually reduce that extra awake time in bed.

This can help build stronger sleep pressure and make sleep more settled.

Then, as your sleep improves, we can gradually increase the amount of time available for sleep again.

It should always be based on you, your sleep and your circumstances.

4. We help your brain connect bed with sleep again

If you’ve had insomnia for months or years, something else can happen.

Your brain starts learning:

Bed = being awake.

Bed becomes the place where you think.

Worry.

Scroll.

Clock watch.

Try to sleep.

Get annoyed because you’re not sleeping.

Calculate how many hours are left until your alarm goes off.

Eventually, just getting into bed can make your brain more alert.

CBT-I helps change that connection.

We want your brain to start relearning:

Bed = sleep.

You may hear this part of CBT-I called stimulus control.

Again, complicated name. Simple idea.

We change some of the things you do around your bed and when you can’t sleep so that bed gradually becomes somewhere your brain expects to sleep again.

5. We work on sleep anxiety and the fear of not sleeping

Insomnia isn’t always just about sleep.

Sometimes it becomes about the fear of not sleeping.

You might start thinking:

“If I don't get eight hours, tomorrow will be a disaster.”

“I have to sleep tonight.”

“Why can't I do something as basic as sleep?”

“Here we go again.”

Understandably, those thoughts can make you more alert.

Your brain starts paying attention to sleep.

And sleep really doesn’t like being watched.

So part of CBT-I is about reducing some of that pressure.

Instead of:

“I HAVE to sleep.”

We might move towards:

“I'd like to sleep. But I don't have to make it happen.”

That sounds like a tiny difference.

But for someone who has spent months desperately trying to sleep, it can be a really important one.

6. We stop trying quite so hard to sleep

This is one of the strangest things about sleep.

The harder you try to sleep, the harder sleep can become.

You can’t decide:

Right. I’m going to be asleep in five minutes.

You can create the right conditions for sleep.

But ultimately, sleep has to happen.

So sometimes part of treating insomnia is actually about doing less.

Less checking.

Less tracking.

Less clock watching.

Less chasing the perfect bedtime routine.

Less Googling.

Less worrying about whether you’re doing sleep correctly.

Less trying to force it.

Because sleep isn’t something you perform.

Sleep is something you allow.

Is sleep hygiene the same as CBT-I?

No.

This is another really important distinction.

Sleep hygiene is not CBT-I.

Sleep hygiene includes things like:

Getting daylight.

Moving your body.

Thinking about caffeine.

Having a comfortable sleep environment.

Creating some space to wind down.

All useful things.

But if you’ve had insomnia for months or years, you probably don’t need another list telling you to buy blackout curtains and stop looking at your phone.

CBT-I goes further.

We’re trying to understand why your sleep has become stuck and what might be keeping it stuck.

Do I have to follow a strict CBT-I programme?

No.

There is a structured way of delivering CBT-I, and I offer a six-week CBT-I programme for people who need or want that approach.

But I also use CBT-I principles within my sleep coaching.

Not everybody wants a strict programme.

Not everybody needs one.

And for some people, particularly those who are anxious about sleep, perfectionistic or neurodivergent, adding lots more rules can sometimes make them even more focused on whether they’re getting sleep “right”.

So instead, we can take the parts of CBT-I that are most useful for your sleep and use them more flexibly.

That might mean working on:

your wake-up time
building more sleep pressure
reducing the amount of time you spend awake in bed
what you do when you wake at 3am
sleep anxiety
clock watching or sleep tracking
your thoughts about a bad night
rebuilding trust in your ability to sleep

The science stays the same. The way we use it can change.

I don't need you to fit neatly into a sleep programme.

I need the sleep plan to work for you.

How long does CBT-I take to work?

CBT-I isn't a sleep hack.

And it isn't designed to give you one magically perfect night.

We might be changing sleep patterns that have been around for months or even years.

That takes a little time.

Sometimes sleep can even feel a bit harder at the beginning while we change some of those old patterns.

But we're working towards something much bigger than one good night.

We want your sleep to become more settled.

More reliable.

Less effortful.

And much less scary.

Because one of the biggest changes I see isn't always:

“I sleep perfectly every night now.”

Sometimes it's:

“I'm not scared of a bad night anymore.”

And that is a huge shift.

Can CBT-I help with waking up at 3am?

Yes, CBT-I isn't only for people who struggle to fall asleep.

It can also be used when you fall asleep reasonably easily but wake during the night and struggle to get back to sleep, including those frustrating 3am wake-ups.

We look at the whole sleep pattern rather than treating that one wake-up in isolation.

That might mean looking at your sleep pressure, body clock, time in bed and, importantly, what happens after you wake.

Because sometimes it isn't the waking that's become the biggest problem.

It's everything that happens next.

CBT-I in really simple terms

If you remember nothing else from this blog, remember this.

CBT-I helps us:

Build your natural need for sleep.

Get your body clock working with you.

Help your brain connect bed with sleep again.

Reduce the worry and pressure around sleep.

Stop spending so much energy trying to make sleep happen.

We're not teaching your body how to sleep.

Your body already knows how to sleep.

Sometimes we just need to remove some of the things that have started getting in its way.

Sleep doesn't need fixing. The conditions around it do.

Frequently asked questions about CBT-I

What does CBT-I stand for?

CBT-I stands for Cognitive Behavioural Therapy for Insomnia. It is specifically designed to help people with insomnia and persistent sleep problems.

Is CBT-I the same as CBT?

No. CBT is used for many different difficulties. CBT-I is specifically focused on insomnia and includes strategies that work with the systems that control sleep.

Is CBT-I just sleep restriction?

No. Sleep restriction or sleep compression can be one part of CBT-I, but CBT-I also looks at your body clock, sleep pressure, time awake in bed, sleep habits, thoughts about sleep and sleep anxiety.

Is CBT-I the same as sleep hygiene?

No. Healthy sleep habits can support sleep, but CBT-I goes beyond general sleep hygiene. It looks at the patterns that may be keeping insomnia going and uses specific strategies to change them.

Do I have to do a full CBT-I programme?

Not necessarily. Some people benefit from a structured CBT-I programme, while others may use individual CBT-I principles as part of more flexible sleep coaching.

Can CBT-I help if I wake during the night?

Yes. CBT-I can be used for difficulty falling asleep as well as waking frequently or being awake for long periods during the night. The approach depends on your individual sleep pattern.

Want help understanding what's happening with your sleep?

If you've been trying everything and still can't work out why you're not sleeping, the first step isn't necessarily another sleep tip.

It's understanding your sleep.

I offer a Personal Sleep Strategy Session

where we look at your sleep pattern, what might be keeping the problem going and what I'd recommend you work on next.

For people with ongoing insomnia who need a more structured approach, I also offer a six-week CBT-I programme.

Because you probably don't need another list of things you're doing wrong.

You need your sleep to make sense.

Kerry