Autism and guardianship in Ontario: what changes at 18

If decision-making support is needed, supported decision-making should be explored before guardianship.

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At 18, parental authority ends, but guardianship is not automatic Guardianship is a court-ordered legal arrangement that removes a person's right to make their own decisions in specified areas This page provides general information, not legal advice. Healthcare providers cannot share medical information without your child's consent. Understanding what changes, and what does not, is the foundation of future planning. If decision-making support is needed, supported decision-making should be explored before guardianship. Read the guide www.endthewaitontario.com/autism-guardianship-ontario

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If decision-making support is needed, supported decision-making should be explored before guardianship. A short silent explainer with captions. Illustrations after Julius Klinger. 38 seconds.

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US$2.4M

Lifetime support costs for autism with co-occurring intellectual disability can reach US$2.4 million per person (Buescher et al.)

Primary source Buescher et al. (2014) Verified 2014-08-01

1 in 50

According to the 2019 Canadian Health Survey on Children and Youth, about 1 in 50 children and youth aged 1 to 17 in Canada had an autism diagnosis

Primary source Public Health Agency of Canada (2024) Verified 2024-03-26
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Last system verification: 2026-11-03. Next scheduled update: 2027-02-01.

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Written by Spencer Carroll

Founder & Autism Advocate

Lived experience: Parent of autistic child in the OAP system