Toddler Not Potty Trained by Age 3
The short answer
While many children are potty trained between ages 2 and 3, it is completely normal for some children to not be fully trained until age 3.5 or even 4. The AAP states there is no "right" age for potty training - readiness varies widely. Girls tend to train earlier than boys. Pressuring a child who is not ready often backfires, leading to resistance and regression. Signs of readiness include staying dry for 2+ hours, awareness of wet or dirty diapers, interest in the toilet, and ability to follow simple directions.
By Age
What to expect by age
Some children show early readiness signs at this age but most are not developmentally ready for full potty training. Introducing the potty as a concept, reading potty books, and letting your child sit on the potty (with no pressure) can build familiarity. Do not push training at this age - the average age of completion is 27-32 months for girls and 29-35 months for boys.
Many families begin potty training in this window. If your child resists after a few days of consistent effort, take a break and try again in a few weeks or months. Power struggles over the potty are counterproductive and can delay training. Signs your child is ready include telling you when they need a diaper change, hiding to poop, and showing interest in older children or adults using the toilet.
This is the most common age range for successful potty training. If your child is not showing interest despite readiness signs, try making it fun (stickers, special underwear they choose) and celebrate small successes. Daytime training typically comes before nighttime dryness. If there is preschool pressure to be potty trained, know that most programs work with families and many children are still training at this age.
About 15-20% of children are not fully daytime potty trained by age 3, and this is within the normal range. If your child is 3.5+ and showing no interest or ability, mention it to your pediatrician. Causes of delayed training can include constipation (the most common medical cause), sensory sensitivities, developmental delays, anxiety, or simply a strong-willed temperament. Addressing underlying constipation often dramatically improves potty training success.
If a child over 4 is not potty trained for stool (encopresis) or is still wetting during the day, a medical evaluation is recommended to rule out structural issues, chronic constipation, or other factors. Nighttime wetting (enuresis) is separate and remains common through age 5-7. A child who was trained but regresses may be responding to stress, a new sibling, a move, or a medical issue like a UTI.
What Should You Do?
When to take action
- Your child is between 2 and 3.5 years old and not yet fully potty trained but is showing some readiness signs
- Your child has mastered daytime training but still wears a diaper at night - nighttime dryness often lags by months or years
- Your child was doing well with potty training but had a brief regression during illness, travel, or a big life change
- Your child is potty trained for pee but still has occasional poop accidents
- Your child is over 3.5 and shows no interest or awareness of needing to use the potty
- Your child seems to be withholding stool, straining, or having very hard bowel movements
- Your child was fully trained but has regressed for more than 2-3 weeks without an obvious cause
- Your child has frequent urinary accidents alongside urgency, pain with urination, or new bedwetting
- Your child has sudden loss of bladder or bowel control along with neurological symptoms like leg weakness or gait changes
- Your child is in severe pain during bowel movements or there is blood in the stool
Sources
Related Resources
Related Behavior Concerns
Potty Training Refusal
Potty training refusal is one of the most common challenges parents face with toddlers. Many children simply are not ready when parents expect them to be, and pushing too hard often makes the resistance worse. The average age for potty training readiness is between 2 and 3 years, but some children are not truly ready until closer to 3.5 or even 4. Backing off, reducing pressure, and waiting for signs of readiness is usually the most effective strategy.
Potty Training Regression
Potty training regression is extremely common and almost never a cause for medical concern. Many children who were reliably using the toilet start having accidents again during times of stress, change, illness, or developmental leaps. This is a temporary setback, not a failure. With patience and a calm, supportive approach, most children return to their previous potty skills within a few weeks.
Toddler Afraid of the Potty
Fear of the potty or toilet is very common in toddlers and is a normal part of development. The toilet can genuinely seem scary to a small child - it is loud, it has a big hole, and things disappear into it. Some children are afraid of falling in, others are afraid of the flushing sound, and some are worried about losing a part of themselves. With patience, gradual exposure, and zero pressure, most children overcome potty fears completely.
My Toddler Is Aggressive Toward Pets
Toddlers being rough with pets is extremely common and almost never reflects true aggression or cruelty. Young children lack the motor control to be consistently gentle and do not yet understand that animals feel pain the way they do. With patient, consistent teaching about gentle touch and close supervision, most toddlers learn to interact safely with pets by age 3-4.
My Baby Doesn't Seem Attached to Anyone
By 7-9 months, most babies show clear preferences for their primary caregivers and some wariness of unfamiliar people. If your baby seems equally comfortable with everyone and shows no distress when separated from caregivers, it may simply reflect an easy-going temperament. However, if combined with other social differences, it can occasionally warrant further discussion with your pediatrician.
My Baby Arches Their Back
Back arching is very common in babies and usually a normal way of expressing frustration, discomfort, or just stretching and moving. Most babies arch their backs when upset, tired, or trying to see something. However, persistent arching with crying, especially during feeding, can be a sign of reflux or discomfort that should be discussed with your pediatrician.