How Do You Know When to Start?
One of the most common questions I hear from parents is: "How do I know if my child is ready to potty train?" It is a great question, because starting too early is one of the biggest mistakes in potty training — it leads to months of resistance, frustration, and accidents that could have been avoided by simply waiting a few more weeks.
The good news is that children give clear signals when they are ready. You do not need to follow a calendar or wait for a specific birthday. You just need to know what to look for.
Here are the 5 most important signs of potty training readiness — and what to do when you see them.
Readiness signs appear gradually — watch for them rather than waiting for a specific age.
Sign 1: Staying Dry for Longer Periods
The most fundamental sign of physical readiness is bladder control. If your child's nappy is dry when you check it after 1.5 to 2 hours, it means they are beginning to hold urine rather than releasing it continuously. This is the physiological foundation that potty training is built on — without it, even the best training approach will not work.
What to do: Start checking nappies at regular intervals. Keep a simple mental note of how often the nappy is wet. When you are seeing dry periods of 90 minutes or more consistently, this sign is present.
Important: A child who is still consistently wet every 30–45 minutes does not yet have sufficient bladder control for active training to succeed. Wait and check again in 3–4 weeks.
Sign 2: Showing Awareness of Being Wet or Soiled
Watch for your child showing discomfort, pulling at their nappy, hiding to do a poo, or telling you — even after the fact — that they are wet or have soiled themselves. This awareness means the neurological connection between the physical sensation and the conscious recognition of it is developing.
You might hear: "Wet." "Poo-poo." "Yucky." Or they might simply look uncomfortable and come to find you. Any form of communication about their bodily state is a positive sign.
What to do: Respond matter-of-factly and positively when your child tells you they are wet: "Thank you for telling me! Let's get you clean." This reinforces the behaviour and builds the communication habit you will need during training.
Sign 3: Showing Interest in the Toilet
Does your child follow you to the bathroom? Ask what you are doing? Want to flush the toilet? Try to sit on the toilet seat? This curiosity is a powerful readiness indicator. Children who are interested in the toilet are pre-motivated for potty training — they already want to do what grown-ups do.
Some children become fascinated by the toilet and ask endless questions about it. Others show a quieter, observational interest. Both are positive signs.
What to do: Encourage this interest. Let your child watch you use the toilet (if you are comfortable with this). Read a potty training book together. Introduce the potty chair as an exciting new object — let them sit on it fully clothed to get used to it before active training begins.
Good potty training books for this stage include Potty by Leslie Patricelli and Once Upon a Potty — both simple, positive, and effective at building excitement about the process.
Sign 4: Being Able to Pull Pants Up and Down
This is a practical readiness sign that parents sometimes overlook. Potty training requires your child to pull their trousers and pants down independently when they feel the urge to go — and to pull them back up afterwards. If they cannot manage this on their own, they will need adult assistance for every single trip, which significantly slows the development of independence.
Test this by putting your child in elasticated-waist trousers or leggings (no buttons, no zips, no belts) and watching whether they can manage the waistband alone.
What to do: If they cannot yet manage it, practise as a game. "Let's see if you can pull your trousers down!" Make it fun and non-pressured. Most children master this skill with a few days of practice once the motor control is there.
During potty training, dress your child in the easiest possible clothing — elasticated waists only. Buttons, dungarees, and tight leggings add precious seconds that a toddler with an urgent bladder does not have.
Physical independence — including managing clothing — is a key readiness milestone.
Sign 5: Being Able to Follow Simple Instructions
Potty training involves a sequence of steps: recognise the urge, stop what you are doing, walk to the bathroom, pull down pants, sit on the potty, do a wee or poo, wipe, pull pants up, flush, wash hands. That is a lot of steps for a toddler.
Your child does not need to manage all of these independently from day one — that is what training is for. But they do need to be able to understand and follow simple two-step instructions reliably: "Go to the bathroom and sit on the potty."
If your child cannot yet follow basic verbal instructions, or is in a phase of strongly refusing everything you ask, potty training will be significantly harder. It does not mean you cannot start — but set your expectations accordingly.
What to do: In the weeks before you plan to start training, practise following instructions as a game. "Can you go and get your shoes?" "Can you put this in the bin?" Building the habit of listening and following through makes potty training much smoother.
Bonus Signs Worth Watching For
Beyond the core five, these additional signs suggest your child is ready or nearly ready:
- Regular, predictable bowel movements — if you know roughly when your child tends to poo, you can use this to time potty sits for early successes
- Ability to sit still for 2–3 minutes — enough to give a potty sit a genuine chance
- Wanting privacy when doing a poo — hiding behind the sofa or going quiet is a classic readiness sign
- Expressing a desire to be "like a big boy/girl" — this developmental motivation is powerful fuel for training
- Resistance to nappy changes — some children start pulling their nappy off or resisting changes as they develop awareness
What Age Should You Expect These Signs?
Most children begin showing readiness signs between 18 months and 3 years. The average age to begin training successfully is around 27 months for girls and 31 months for boys — but these are averages across a very wide range.
Some children are ready at 20 months. Some are not ready until 3.5. Both are completely normal. The research consistently shows that children who start later — when they are truly ready — complete training faster and with fewer setbacks than children who start early.
If your child is showing 4 or more of the 5 signs above, they are likely ready to begin. If they are showing fewer than 3, wait 4–6 weeks and reassess.
When NOT to Start (Even If the Signs Are There)
Even if your child is showing all 5 readiness signs, there are times when it is better to wait:
- A new sibling is arriving or has just arrived — major family change disrupts the consistency potty training needs
- You are moving house — the disruption to routine makes success much harder
- Your child has just started nursery — let them settle in for 4–6 weeks first
- Your child is unwell — illness, ear infections, and teething can cause accidents even in trained children
- You do not have 3 clear days — the intensive launch phase works best when you can be at home and fully focused
Timing matters — starting when both you and your child are ready makes everything easier.
Quick Summary: The 5 Signs of Potty Training Readiness
- Staying dry for 1.5–2 hours at a time — physical bladder control is developing
- Showing awareness of being wet or soiled — the neurological connection is forming
- Showing interest in the toilet — natural motivation is present
- Being able to pull pants up and down — practical independence is possible
- Being able to follow simple instructions — cognitive readiness is there
Is your child showing these signs? Then it might be time to start. Read my step-by-step guide to get the first week right:
Have a question about readiness? Leave it in the comments below — I answer every one.
Written by Baby Potty Training Mommy — sharing real-world potty training advice since 2010. Read more about me here.
This post contains affiliate links. If you purchase through my links I may earn a small commission at no extra cost to you.
