The short answer

Keep your toddler in their cot for as long as possible; there's no upper age limit, and a bed will not fix sleep problems, it will make them worse. Move only when they're climbing out or genuinely need night-time toilet access, avoid other big changes, involve them in the process, and recreate the cosy cot feeling in the new bed.

One of the most common questions parents ask is: when should I move my toddler out of their cot? The short answer: later than you probably think.

Don't rush it

The cot offers your toddler something really valuable: a cosy, enclosed space that feels safe and familiar. That snug, nest-like feeling is genuinely reassuring for them, and it provides a clear physical boundary that helps them stay in their sleep space through the night. As a general rule, keep your toddler in their cot for as long as possible. There's no upper age limit; plenty of four-year-olds are still happily sleeping in their cots, and that's perfectly fine. As long as your child is comfortable and sleeping well, there's no rush to make the change.

Many parents tell me they're going to move their toddler from a cot to a bed because a new baby is coming or because bedtime has become a disaster and their toddler "hates their cot". My number 1 piece of advice is this: if your toddler is having bedtime or sleep issues, a bed absolutely WILL NOT solve your problems. It will only make them worse. Work on their sleep before you move them out of the cot. Believe me, there are ways to do this.

The main reasons to consider transitioning are if your toddler is climbing out of their cot (which becomes a safety issue), or if they're toilet trained and need to be able to get up overnight to use the bathroom. But in saying this, if your toddler is toilet trained, I advise you leave them in a nappy overnight for as long as they're happy to be in one. Most toddlers won't wake to go to the toilet overnight until they're quite a bit older, so until this becomes an issue for your toddler I would keep them in their cot even when toilet trained. Just ensure they go to the toilet before bedtime and you should be ok.

Timing matters

Try to avoid making the transition during periods of other big change. Moving house, welcoming a new sibling, starting childcare: any of these can make a toddler feel unsettled, and adding a sleep change on top can compound that. Ideally, if a new baby is on the way, either make the move well before the baby arrives (but only do this if your toddler is truly ready to move out of their cot), or wait until after things have calmed down. A second-hand cot for the baby is always a better option than disrupting your toddler's sleep before they're ready. Trust me on this!

Involve them in the process

When the time does come, involve your toddler in the process of moving from cot to bed. Let them come along to choose their new bed linen, pick a special pillow, or help set up their new sleeping space. Giving them some ownership over the change helps them process what's happening and feel more ready. Talk about it in the days leading up, keeping the tone matter-of-fact and positive without over-hyping it. Toddlers can sense pressure even when it's well-intentioned.

Another misconception parents have is that they call it a "big boy / girl bed". Giving the bed this title instead of calling it just a "bed" adds to this pressure. Parents think they can hype up the bed by making it a "big boy/girl bed" which will help make the transition smoother, but in reality it might make your toddler feel worried and confused. They're at the age where they feel like both baby and big kid at the same time, or they can swing between the two very rapidly. Keeping it neutral as just a bed helps them figure out the transition and what it means for their sense of self. If anything you can call it a "spidey bed" or a "unicorn bed" if those are the style of sheets your toddler's chosen.

Also on this note of ensuring your toddler is involved in the process: avoid doing a room makeover for your toddler while they're out of the house or as a surprise. They'll feel totally shocked to see their room transform in such a big way, and they might still feel attached to how their room used to be. They need to say "goodbye" to their cot, watch as things are shifted around or taken out, and see the bed being installed or sheets put on (I get it, you don't quite need a clumsy toddler in the room while you're doing a DIY project). Do what you can for them to watch the process of their cot or room being transformed. This will help them transition much easier as they won't feel as disoriented in their own space.

Recreate the cot feeling

One of the biggest reasons toddlers struggle after moving to a bed is that it feels open and exposed compared to the cosy enclosure of their cot. To help, add a bed rail on the open side to recreate that enclosed feeling. Keep the rest of the sleep environment the same: same room, same routine, same comforter or sleeping bag if possible. The more you can make the bed feel familiar the better.

Expect some adjustment

A wobble after the transition is completely normal. Your toddler may take a few nights to adjust, and some regression in sleep quality is common. Hold your bedtime routine steady, keep your expectations clear, and give them time. If things really aren't settling, remember that there's no shame in putting the cot back. It's always an option, and your toddler's readiness matters more than any milestone timeline (which is a made up construct anyway!).

For more sleep help, browse my sleep guides or book a 1:1 consult.