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Ontario decision-making guide
Turning 18 does not automatically make a parent the decision-maker. Understand supportive options, Power of Attorney, and when to seek qualified legal advice before considering guardianship.
In brief
Parents navigating guardianship decisions at 18 are often the same families who waited years for early intervention that could have supported greater independence for their child.
Registered
91,97491,974Children registered
Total registered in the Ontario Autism Program
Funded
20,71120,711Have active funding
Only 22.5% of registered children
Without active agreement
71,26371,263Without an active funding agreement
An administrative status; it does not confirm current service delivery.
Verified , MCCSS FOI via OAC · May 2026
| Metric | Value |
|---|---|
| Children registered | 91,974 |
| Have active funding | 20,711 |
| Without an active funding agreement | 71,263 |
Understand the hierarchy of decision-making supports from least to most restrictive.
A legal document where a capable adult appoints someone to make decisions for them.
Court-appointed authority to make decisions for someone found mentally incapable.
Informal arrangement where trusted people help an individual understand and make choices.
In Ontario, guardianship is divided into two distinct categories. You can apply for one or both.
Managing bank accounts, paying bills, signing contracts, managing investments.
Medical consent, housing decisions, safety, nutrition, and hygiene.
A formal assessment by a designated Capacity Assessor ($500-$900 cost) proving incapacity.
You must submit a detailed plan to the Public Guardian and Trustee (PGT) on how you will manage decisions.
A lawyer files your application with the Superior Court of Justice. PGT reviews and comments.
A judge grants the guardianship order. You are now legally accountable for decisions.
The financial cost of guardianship varies by path. Budget accordingly.
$500 – $900
Conducted by a designated Capacity Assessor (list maintained by the Capacity Assessment Office). Required before court application.
$3,000 – $8,000+
Lawyer fees for preparing and filing the court application. Uncontested applications (no one opposes) are at the lower end. Contested cases cost significantly more.
$0 – $500
If the individual has capacity to understand and grant POA, this can be done with a lawyer for $300-$500 or using free templates from the Ontario government. Far simpler than guardianship.
If a parent or caregiver suddenly cannot provide care (illness, death), and no guardianship or POA is in place:
This is why advance planning before the 18th birthday is critical. Do not wait for an emergency to establish legal authority.
Yes. In Ontario, at age 18, all individuals are presumed capable of making their own decisions unless a court or capacity assessor determines otherwise. Parents do not automatically remain guardians.
Power of Attorney (POA) is voluntary, the individual chooses you while they are capable. Guardianship is court-ordered, a judge appoints you because the individual is verified as mentally incapable of making that specific type of decision.
Yes. For ODSP specifically, you can apply to be a "Trustee" just for those government payments. This is a simpler process than full guardianship of property.
Take Action
Ontario families assembled this evidence from the government’s own records. Put it to work.
Can I file a human rights complaint about autism wait times?
VerifiedFamilies can file human rights applications with the Ontario Human Rights Tribunal alleging discrimination in service access. [OHRC] While complaints require legal resources and time, successful cases can force systemic change and establish precedents for disability rights in healthcare access.
Source: Ontario Human Rights Commission [OHRC] · Open source record
What is Relationship Development Intervention (RDI)?
VerifiedRDI is a parent-based intervention teaching parents to create guided participation opportunities that build cognitive, social, and emotional development. [WHO] Because RDI emphasizes parent coaching over direct therapy, it aligns with waitlist realities-yet OAP funding mechanisms don't always recognize this family-centered approach.
Source: World Health Organization [WHO] · Open source record
Sources on this page
Key claims are paired with their source, evidence tier, and verification date so readers can inspect the public record directly.
91,974
children are registered in the Ontario Autism Program
US$2.4M
Lifetime support costs for autism with co-occurring intellectual disability can reach US$2.4 million per person (Buescher et al.)
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
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Founder & Autism Advocate