When to Move From a Cot to a Bed?

Transitioning your toddler from a cot to a bed is a big milestone, and if you’re staring at their crib wondering, “Is it time?”, you’re not alone. This isn’t just a furniture switch, it’s a developmental shift — for both of you. So let’s gently unpack the science, signs, and strategies that can help you make this change with confidence.

Why might a toddler wake up more after the move?

Here’s the thing, just because your child can physically climb out of the cot doesn’t mean they’re developmentally ready for a bed. The shift from cot to bed removes the built-in boundaries that many toddlers still need for their developing impulse control. Research suggests that children under 2.5 years old may not yet have the neurological maturity to resist the temptation to get up repeatedly at night (Jenni and Carskadon, 2005). Their prefrontal cortex, the part of the brain responsible for self-regulation, is still in the early stages of development.

And let’s not forget the comfort factor. That cot has been their sleep sanctuary since birth. Suddenly swapping it for a wide-open bed can feel like moving from a cozy den to the middle of a football field, unfamiliar and a bit overwhelming.

Why is this transition emotionally hard for parents?

Because it marks the end of an era. That cot might be one of the last baby items in your home, and letting it go can feel like letting go of your baby altogether. Add in the sleep disruption that can come with the transition, and you’ve got a perfect cocktail of nostalgia and sleep deprivation. You're not alone in feeling bittersweet or anxious, those feelings are valid and normal.

Is it okay to wait?

Absolutely. In fact, most sleep professionals recommend waiting until your child is at least 3 years old. Why? Because around this age, they’re more likely to understand rules, follow instructions, and have the impulse control needed to stay in bed. A 2020 review in the Journal of Pediatric Sleep Medicine found that delaying the transition until after the third birthday was associated with better nighttime sleep quality and fewer disruptions.

There are also logistical reasons to delay. If your toddler is experiencing a big life change —a new sibling, starting daycare or preschool, or moving homes now is not the time to make this switch. Too many transitions at once can overwhelm their sense of security.

How do I know when my child is ready?

Here are some signs your child may be ready:

They’re consistently climbing out of the cot and it’s becoming a safety issue.
They’re nearing or exceeding the height or weight limit for their cot.
They’re asking for a big kid bed or showing curiosity about yours.
They’re sleeping through the night in their cot and have a generally settled routine.

But remember, one or two signs don’t mean you need to rush. Readiness is as much about emotional and cognitive development as it is about physical growth.

How do I make the transition smooth and successful?

Prep, prep, prep

Start laying the emotional groundwork early. Talk about the upcoming change in a positive way: “Soon you’ll have a big kid bed just like me!” Read books together about moving to a bed, or role-play with dolls or stuffed animals.

Make it exciting, not intimidating

Let your toddler help choose their bedding or even pick out the bed itself if that’s an option. Get creative, let them decorate a sleepy-time corner or design a bedtime ritual around their new space. This gives them a sense of ownership and pride.

Keep the room safe and the routine consistent

Make sure their new bed is low to the ground and that the room is fully toddler-proofed. Keep the bedtime routine the same, bath, book, cuddle, lights out. This continuity anchors them even if the bed feels different.

Use visual cues and boundaries

A toddler clock, a bedtime chart, or even a simple “stay in bed until the sun is up” rule can reinforce the boundaries they had in the cot. Some families find it helpful to use a baby gate on the bedroom door for a short period during the transition, not as a punishment, but as a way to replicate the familiar boundaries of the cot.

What if the transition backfires?

It happens. Sometimes the new bed becomes a novelty that leads to wandering, tantrums, or very early wake-ups. If things go south, it’s okay to pause the transition and try again in a few weeks. This isn’t a failure, it’s a sign your child needs a bit more time.

Moving from a cot to a bed is one of those big kid steps that can feel both thrilling and terrifying. You’re not doing it wrong if your child resists, or if the timing isn’t what the parenting books suggest. You’re tuning into your child, and that’s the heart of responsive parenting.

When you wait until they’re truly ready — physically, emotionally, and developmentally — the transition becomes far smoother. There’s no rush. The cot can stay, the big bed can wait, and your instincts are more than enough.

Need help deciding when or how to make the switch? Book a 30-minute sleep coaching call, or join the Nurture Network Membership, so we can support you every step of the way.

FAQ

Is 18 months too young to move to a bed?

While some children transition at 18 months, most are not developmentally ready. They lack the impulse control to stay in bed consistently. Waiting until 2.5 to 3 years is often recommended.

Should I move my toddler if a new sibling is arriving?

Generally, no. It’s best to avoid major transitions like cot-to-bed moves during other big life changes. Let your toddler adjust to one thing at a time.

What if they climb out of the cot but aren’t ready for a bed?

Consider a sleep sack, lowering the mattress, or using a crib tent if it’s safe and appropriate. If safety becomes a concern, the bed might be necessary, but manage expectations.

References

Jenni, O.G., and Carskadon, M.A. (2005). Sleep behavior and sleep regulation from infancy through adolescence. Sleep Medicine Clinics, 1(3), 321-329.
Mindell, J.A., et al. (2020). Bedtime routines for young children: A dose-dependent association with sleep outcomes. Journal of Pediatric Sleep Medicine, 4(2), 85-92.