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When is the best age to start potty training?

Last updated on June 3, 2026

There is no one "best" age to start potty training, but the research notes the age at which potty training is started can impact how long it takes to complete. Children who start training later complete later, but training takes a long time if you start earlier. For example, if you start training around 27 months, you can expect to finish around age three, but it will take ten months. If you start at age 3, you finish later, but it might take you less than six months to fully train. It is also important to consider your child's individual development and readiness, as well as their personality. A three-year-old may have more control over their bathroom functions, but they may also be more willful and difficult to train. On the other hand, an 18-month-old may be less likely to resist training, but also may have less control over their bodily functions. Ultimately, the decision of when to start potty training should be based on what works best for your child and family.

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