When Is the Best Age to Start Potty Training?

One of the most common questions parents ask is:

"When is the best age to start potty training?"

Unfortunately, the answer often depends on who you ask.

Some people say 18 months.

Others say 2 years old.

Some suggest waiting until your child shows readiness signs.

Others recommend waiting until closer to 3.

With so much conflicting advice, it's no wonder parents feel unsure about when to begin.

The truth is, there isn't one magic age that works perfectly for every child.

But there are some important things parents should know before deciding when to start.

Why Age Isn't the Only Thing That Matters

When people talk about potty training, they often focus entirely on age.

But age is only one part of the picture.

Potty training is really about helping your toddler develop skills such as:

• body awareness
• communication
• following routines
• independence
• confidence around the toilet

These skills don't suddenly appear on a child's second birthday.

They develop gradually over time.

That's why two children of the same age may have very different potty training experiences.

The Problem With Waiting for the "Perfect Time"

Many parents are told to wait until their child is:

• asking to use the toilet
• telling them when they need a wee
• staying dry for long periods
• asking to remove their nappies

The challenge is that a lot of these behaviours often develop during the potty training process, not before it.

If you wait for every readiness sign to appear, you may end up delaying the process unnecessarily.

In some cases, children also can become more resistant to change as they get older, making potty training feel harder rather than easier.

Why Some Families Start Before Age 2

Many cultures around the world introduce toilet learning much earlier than is common in the UK.

Even within the UK, there is growing interest in introducing the toilet before a child turns 2.

Parents who start earlier often like that:

• toilet routines become normal from a younger age
• awareness develops gradually
• there is less pressure to finish quickly
• learning happens over time rather than all at once

Starting earlier doesn't mean expecting immediate independence.

It simply means beginning the learning process sooner.

What If You Wait Until 3?

Some children potty train successfully at 3 years old.

However, waiting longer doesn't automatically make potty training easier.

Older toddlers may have:

• stronger habits and attachments around nappies
• stronger preferences and opinions
• more resistance to change
• greater awareness of accidents and embarrassment

Another factor parents don't often consider is time.

If potty training goes smoothly, this may not matter.

But if your child struggles with things like:

• pooing on the toilet
• poo withholding
• constipation
• toilet resistance

you have less time to work through those challenges before school starts.

This can sometimes create extra pressure for parents, who may suddenly feel they need to get potty training finished before a deadline.

Unfortunately, that pressure can then leak into the potty training process itself, making it feel more stressful for both parent and child.

This doesn't mean potty training at 3 is a bad idea or won't work. Many children potty train successfully at this age.

It simply means that waiting longer doesn't guarantee an easier experience, and if challenges do arise, there is often less time available to work through them.

So What Is the Best Age?

For many families, somewhere between 18 and 24 months can be a wonderful time to begin introducing potty training skills.

At this age, children are often:

• eager to copy adults
• developing independence
• open to new routines
• becoming more aware of their bodies

Rather than focusing on finding the perfect age, it can be more helpful to focus on building the skills that support successful potty training.

What Matters More Than Age

The most successful potty training experiences often have less to do with age and more to do with preparation.

Things that can make a big difference include:

• building awareness of wees and poos
• introducing toilet routines
• creating positive experiences around the bathroom
• developing confidence before nappies come off

These foundations can be introduced whether your child is 18 months, 20 months, or 2 years old.

A Structured Approach Can Help

One reason parents become confused about when to start potty training is that most advice focuses on either waiting for "signs" or jumping right in and removing nappies on Day 1.

But potty training doesn't have to begin with either of those things.

That's why some parents prefer a staged approach such as the Potty Pros Academy, which focuses on building awareness, routines, and confidence starting from 18 months, while your little one is still in nappies. 

Instead of looking for the perfect age, the focus becomes helping your child develop the skills they need over time.

FAQs

Is 18 months too early to start potty training?

Not at all.

Most toddlers, apart from those with specific additional needs can begin learning important potty training skills at 18 months, particularly when the focus is on awareness and routines rather than immediate independence.

Should I wait for readiness signs before starting potty training?

No.

The idea that parents should wait for a long list of readiness signs before starting potty training is now considered outdated advice.

Many of the so-called readiness signs that parents are told to wait for such as telling you they need a wee, showing lots of interest in the toilet, or staying dry for long periods, often develop during the potty training process, not before it.

If you'd like to learn more, read my article on New UK Potty Training Guidance: What Parents Actually Need to Know.

Is 2 years old the best age to potty train?

For many families, starting somewhere between 18 and 24 months works well, before the tricky "no" phase begins. However, there is no single perfect age that suits every child.

Is it harder to potty train a 3 year old?

Not necessarily, but older children may have stronger habits around nappies and can sometimes be more resistant to change than younger toddlers.

Can a potty training course help me know when to start?

Many parents find it helpful to follow a structured approach rather than relying on conflicting advice online.

If you'd like a calm, staged potty training method designed for toddlers aged 18–24 months, you can learn more about the Potty Pros Academy here.

If You Haven't Started Yet (Or Want It to Feel Easier)

If you're still trying to work out when to start potty training, focusing on preparation can make the decision feel much less overwhelming.

That's exactly why I created my free guide: 5 Things to Do Before Starting Potty Training

It walks you through the simple steps that help your toddler build awareness, confidence, and routines before you begin.