Legal Decision-Making in Ontario: Capacity, Powers of Attorney and Guardianship — A Family Guide

If you’re supporting an adult with a developmental disability in Ontario, the day they turn 18 quietly changes who is legally allowed to make their decisions — and that surprises a lot of families. This guide walks through what “capacity” actually means in Ontario law, and the full range of options from everyday informal help, to powers of attorney, to guardianship as a genuine last resort. It’s written to help you find the least restrictive path that keeps your family member in the driver’s seat wherever possible, with every rule, statute, and cost sourced.

Read this first. This is general legal information about Ontario law as of 2025–2026. It is not legal advice and cannot replace advice from a qualified Ontario lawyer who knows your family’s situation. Every person and every decision is different. Before you act — especially before applying for guardianship or signing a power of attorney — talk to a lawyer licensed in Ontario. Free and low-cost options are listed at the end.

The short version — the options, from least to most restrictive

• The starting point is autonomy. In Ontario, every adult 18 and older is legally presumed capable of making their own decisions. A developmental disability does not, by itself, remove that right. Capacity is decision-specific and can change over time. This presumption is part of your family member’s basic Rights, Accessibility, and Anti-Discrimination Law for Adults with Developmental Disabilities in Ontario.
• Informal and supported decision-making (least restrictive). Most adults with developmental disabilities can make their own choices with everyday help from trusted people — explaining information, weighing options, communicating a decision. This is how most families already operate. In Ontario it is not a formal legal status — there is no standalone statute for it.
• Powers of attorney (planning ahead, while capable). If the adult can understand what it means to appoint a helper, they can make a Power of Attorney for Property and/or a Power of Attorney for Personal Care, choosing who will decide for them if they later cannot. This is made by the person, not imposed on them.
• Guardianship (most restrictive, last resort). When an adult is found incapable and has no valid power of attorney, a substitute decision-maker can be appointed — a guardian of property (through the Public Guardian and Trustee or the court) and/or a guardian of the person (court only). This removes decision-making rights and is meant to be used only when nothing less restrictive will work.
• The law’s default is the least-restrictive option that preserves autonomy. Ontario’s Substitute Decisions Act requires that a guardian not be appointed if a less restrictive alternative will meet the need. This is the single most important principle for families to hold onto.

What every family should know

1. Turning 18 changes the legal picture. Once a person turns 18, parents no longer have automatic legal authority to make decisions for them, regardless of disability. Institutions (banks, the Canada Revenue Agency, doctors) may deal only with the adult. Families are often surprised by this.
2. “Capacity” has a specific legal meaning. Under Ontario law, a person is capable if they can (a) understand the information relevant to a decision, and (b) appreciate the reasonably foreseeable consequences of deciding or not deciding. It is about ability to reason through a decision, not about whether the decision is wise. The law explicitly protects the right to make unwise, eccentric, or risky choices.
3. Capacity is not all-or-nothing. It is decision-specific (someone may be capable of choosing where to live but not of managing complex investments), time-specific (it can fluctuate), and domain-specific (Ontario law separates capacity for property/finances from capacity for personal care).
4. Powers of attorney are made while capable; guardianship happens after incapacity. A power of attorney is chosen by the person in advance. Guardianship is imposed through a legal process after a finding of incapacity. A valid power of attorney usually avoids the need for guardianship entirely.
5. Guardianship is the most restrictive option and a last resort. It should only be used when the person is genuinely incapable and no less restrictive tool (like a power of attorney) is available. Guardianship can be limited to only the areas where the person lacks capacity.
6. Supported decision-making (SDM) has no formal legal status in Ontario. It is widely practised informally and strongly promoted by disability advocates, but Ontario has not passed legislation recognizing it — unlike several other provinces. This is a live area of advocacy and unfinished law reform.
7. This guide covers decisions about the PERSON. Managing inherited money (Henson trusts, RDSPs, ODSP asset rules) and the broader “dignity of risk” safeguarding practice are covered in separate AIM guides — see Henson Trusts and Estate Planning for a Family Member on ODSP in Ontario and Dignity of Risk and Safeguarding in Ontario: A Guide for Families and Staff. This page points to them but does not cover them in depth.

What “capacity” means in Ontario law

The presumption of capacity. Ontario law begins from the position that adults can make their own decisions. The Substitute Decisions Act, 1992 (SDA) states that a person 18 or older is presumed capable of entering into a contract, and a person 16 or older is presumed capable of giving or refusing consent about their own personal care. A person is entitled to rely on this presumption about another person unless they have reasonable grounds to believe the person is incapable (SDA s. 2). This means incapacity must be proven — the burden falls on whoever alleges it, not on the person with a disability to prove they are capable.

The legal test. Under section 6 of the SDA, a person is incapable of managing property if they are “not able to understand information that is relevant to making a decision in the management of his or her property, or [are] not able to appreciate the reasonably foreseeable consequences of a decision or lack of decision.” Section 45 sets out a parallel test for personal care (health care, nutrition, shelter, clothing, hygiene, and safety). The two building blocks are the same everywhere in the law: understand and appreciate.

Capacity is about ability, not wisdom. Ontario’s own Guidelines for Conducting Assessments of Capacity (Capacity Assessment Office, Ministry of the Attorney General) stress that “capable but risky or even foolish decisions must be respected.” Courts have said the same in memorable terms. In Koch (Re), 1997 CanLII 12138 (ON SC), the court wrote: “The right knowingly to be foolish is not unimportant; the right to voluntarily assume risks is to be respected. The State has no business meddling with either. The dignity of the individual is at stake.” This is the legal backbone of the Dignity of Risk and Safeguarding in Ontario: A Guide for Families and Staff philosophy: a capable adult has the right to make choices others think are unwise.

Two separate domains. Ontario law deliberately keeps property/finances separate from personal care. A person can be capable in one and not the other. Capacity for health-care treatment is assessed treatment-by-treatment under a different statute (below), and there is no minimum age — capacity, not age, governs.

Capacity can fluctuate. A person may be capable at one time and not another (for example, due to a temporary medical condition, medication, or crisis), and capable of some decisions but not others. Assessments must be tied to a specific decision at a specific time.

The Ontario legal framework — three statutes and one office

• Substitute Decisions Act, 1992 (SDA). Enacted 1992; came into force April 3, 1995; key amendments came into effect March 29, 1996 (at the same time the earlier Consent to Treatment Act was repealed and replaced by the HCCA). Governs capacity for property and personal care, powers of attorney, statutory guardianship of property, and court-appointed guardianship. Sets out guardians’ and attorneys’ duties.
• Health Care Consent Act, 1996 (HCCA). Governs consent to treatment, admission to long-term care, and personal assistance services. Sets the rule that everyone is presumed capable (including minors), and creates the ranked list of substitute decision-makers for health decisions.
• Mental Health Act (MHA). Relevant in narrower situations, e.g., a certificate of incapacity to manage property issued for a patient in a psychiatric facility.
• Office of the Public Guardian and Trustee (OPGT). Part of the Ministry of the Attorney General. It makes financial decisions for adults found incapable when no one else can; acts as health-care substitute decision-maker of last resort; investigates allegations of serious harm to incapable adults; maintains the guardianship register; and appoints “Section 3 counsel” to represent alleged incapable persons in court. (Note: the OPGT has advised it is moving to a new internal case-management system in early 2026, which may temporarily affect service timelines.)

The spectrum of options, least to most restrictive

Informal and supported decision-making — least restrictive

The great majority of adults with developmental disabilities make their own decisions with help — someone explaining information in plain language, breaking a choice into steps, or helping communicate a decision. Communication barriers and needing more time or accommodation are not the same as incapacity; conflating them is a common and serious error. This informal support fits Ontario’s presumption of capacity and its human-rights duty to accommodate.

Ontario does not, however, have a statute that formally recognizes supported decision-making (see the grey-areas section below). Supporters have no legally recognized signing authority; banks and hospitals are not obliged to deal with a “supporter.” Families sometimes use practical workarounds (for example, joint bank accounts with a trusted person) — but these carry their own risks and should be discussed with a lawyer.

Powers of attorney — chosen in advance, while capable

A power of attorney (POA) is a document in which a capable person (the “grantor”) names someone they trust (the “attorney” — who need not be a lawyer) to make decisions for them. There are two types:

• Continuing Power of Attorney for Property (CPOAP). Covers finances — banking, bills, taxes, property. “Continuing” means it keeps working even after the grantor becomes incapable. It can take effect immediately or be written to take effect only on incapacity. It can authorize anything the grantor could do with their property except make a will. Both grantor and attorney must be at least 18.
• Power of Attorney for Personal Care (POAPC). Covers health care, housing, food, hygiene, and safety. It only takes effect when and if the grantor becomes incapable of the personal-care decision in question. The grantor must be at least 16.

Key point for families: the capacity needed to make a POA is lower than full decision-making capacity. To grant a POAPC, the person needs to understand whether the proposed attorney genuinely cares about their welfare and that the attorney may need to make decisions for them. This means many adults with developmental disabilities can make a valid power of attorney — which is often a far better fit than guardianship, and a cornerstone of Future & Succession Planning in Ontario: A Guide for Aging Parents of an Adult with a Developmental Disability. Formalities: the document must be signed before two qualifying witnesses (the grantor’s spouse/partner, the named attorney, the attorney’s spouse/partner, the grantor’s child, and anyone under 18 cannot witness). Since April 2021, Ontario permits remote/virtual witnessing by audio-visual technology where one witness is a licensed lawyer or paralegal (now a permanent rule).

You can make a POA for free using the CLEO / Steps to Justice Guided Pathway or a Ministry of the Attorney General kit, or through a lawyer. Pro Bono Ontario’s hotline (1-855-255-7256) offers up to 30 minutes of free advice on POAs.

Guardianship — imposed after incapacity, most restrictive

Guardianship applies when an adult is found incapable and there is no valid POA (or the attorney can’t or won’t act). It comes in two forms — of property and of the person — and there are two routes to property guardianship.

Guardianship of property — two routes:

1. Statutory guardianship (no court hearing). A Capacity Assessor (a designated professional trained under the SDA) assesses the person under section 16 of the SDA. If they issue a Certificate of Incapacity to manage property, the OPGT automatically becomes the statutory guardian from the date it receives the certificate. A family member (spouse, partner, or relative) can then apply under section 17 to replace the OPGT, submitting a management plan (Form 2). This route is generally faster and cheaper than court. Two important limits: it covers property only (there is no statutory guardian of the person), and it cannot proceed if the person refuses the assessment — then a court application is required. A separate trigger exists for psychiatric-facility patients under the Mental Health Act.
2. Court-appointed guardianship of property (SDA s. 22). An application to the Ontario Superior Court of Justice, with evidence of incapacity (usually a capacity assessment), a management plan, and notice to the person and family. Used where statutory guardianship isn’t available or appropriate, or where matters are contested.

Guardianship of the person (court only, SDA s. 55). The only way to become guardian of the person is by applying to court. The applicant files a guardianship plan and capacity evidence. The court can order full guardianship (all areas) or, more appropriately, partial guardianship limited to the specific areas where the person is incapable — for example, health care only, if the person can still decide other personal matters.

Who can be a guardian. Any capable adult 18 or older (guardian of the person: 16+). People paid to provide health, residential, social, training, or support services to the person generally cannot be the property guardian (with exceptions for a spouse, partner, relative, or an attorney under a continuing power of attorney) — a conflict-of-interest safeguard directly relevant to service providers.

The OPGT’s role in guardianship. The OPGT is the statutory guardian of property by default; is named as a respondent in (and reviews) court guardianship applications; can be appointed guardian only as a last resort where no suitable person is willing and available, and only with its written consent; and can investigate and seek a temporary guardianship (up to 90 days) where a person is incapable and serious adverse effects are occurring or may occur.

Cost and time (practitioner estimates, not official schedules). A formal capacity assessment commonly starts around $1,200 and rises with complexity — Toronto firm Bobila Walker Law advises families to “expect costs for the capacity assessment (starting at approximately $1,200),” while other sources cite assessor fees ranging from roughly $1,000 to $2,500 per assessment. (For the statutory route, the OPGT’s fee to review an application to replace it as statutory guardian is $382, per ontario.ca.) An uncontested court guardianship typically runs a few thousand dollars in legal fees plus disbursements and takes roughly three to six months, while contested cases can take twelve to twenty-four months and cost substantially more. Verify current figures with a lawyer or the OPGT.

A guardian’s (and attorney’s) duties and limits

Guardians and attorneys acting during incapacity are fiduciaries. Under the SDA their powers and duties must be “exercised and performed diligently, with honesty and integrity and in good faith, for the incapable person’s benefit.” Core duties include:

• Choose the least restrictive and least intrusive course of action available and appropriate.
• Foster the person’s independence and encourage their participation in decisions as much as possible.
• Consult the person and their supportive family and friends, and foster regular personal contact with them.
• Make decisions considering the person’s comfort and well-being, and follow prior capable wishes and values where known.
• Keep detailed records and (for property) act within the approved management plan; property guardians of estates over $50,000 must file accounts with the OPGT.
• Guardians of property may receive compensation at rates set in regulation. Under O. Reg. 26/95, s. 1 (SDA): (a) 3% on capital and income receipts; (b) 3% on capital and income disbursements; and (c) three-fifths of 1% (0.6%) on the annual average value of the assets as a care-and-management fee — subject to court review on a “passing of accounts.”

Limits and oversight. Guardians and attorneys can be removed or replaced for failing their duties; the court can reduce compensation; and a guardianship can be terminated if capacity is restored or the guardianship is no longer necessary. Any person entitled to notice of the original application can seek to vary or end it. A well-documented systemic weakness (identified by the Law Commission of Ontario) is that monitoring is largely “passive” — abuse or mismanagement often surfaces only when someone complains.

Substitute decision-making for health care (the HCCA hierarchy)

For a treatment decision, if a health practitioner finds a person incapable for that specific treatment, consent must be obtained from a substitute decision-maker (SDM). Section 20 of the HCCA sets a ranked hierarchy: (1) a guardian of the person with authority; (2) an attorney for personal care; (3) a representative appointed by the Consent and Capacity Board; (4) spouse or partner; (5) child or parent (or a children’s aid society); (6) a parent with only a right of access; (7) a brother or sister; (8) any other relative. If no one is available or willing, the OPGT is the SDM of last resort. Everyone in Ontario therefore always has a health-care SDM. Key protections: the person must still be involved as much as possible; a capable refusal by the person overrides; the SDM must follow the person’s prior capable wishes, and otherwise act in their best interests; and disputes go to the Consent and Capacity Board.

Comparing the options at a glance

Feature	Informal / Supported decision-making	Power of Attorney (Property or Personal Care)	Statutory guardianship of property	Court-appointed guardianship (property and/or person)
Who decides	The adult, with help	The adult now; attorney if/when incapable	Substitute (OPGT, or family replacing OPGT)	Substitute (court-appointed guardian)
Made by / imposed?	Chosen; no formal document needed	Chosen by the adult while capable	Imposed after a Certificate of Incapacity	Imposed by court after finding of incapacity
Capacity required	Presumed capable	Capacity to grant a POA (a lower bar)	Person found incapable of property	Person found incapable of the relevant domain
Court needed?	No	No	No (assessor + OPGT/Form 2 replacement)	Yes — always
Covers person (health/housing)?	Yes, informally	Yes (POAPC)	No — property only	Yes (guardian of the person)
Formal legal status in Ontario?	No standalone statute	Yes (SDA)	Yes (SDA ss. 15–17)	Yes (SDA ss. 22, 55)
Reversible / limited?	N/A	Revocable while capable	Terminable if capacity restored	Can be partial, time-limited, terminated
Rough cost	None	Free (self-help) to modest (lawyer)	Assessment ~$1,000–$2,500; OPGT review $382	Few thousand $ (uncontested) to much more (contested)

How a family decides what, if anything, is legally needed

Work from least restrictive to most restrictive, and stop at the first option that genuinely meets the need:

1. Start by assuming capacity. Ask: can the adult make this decision with the right support — plain-language explanation, more time, a trusted person to talk it through, accessible formats? If yes, no legal tool is needed. Communication needs are not incapacity.
2. Identify which decisions are actually a problem, and in which domain (property vs. personal care). Don’t reach for a global solution to a narrow issue. A one-time transaction may be solvable without any ongoing appointment.
3. If planning ahead and the person can understand appointing a helper, consider powers of attorney. This keeps the choice of decision-maker in the adult’s hands and usually avoids court. Get advice on whether the person has capacity to grant a POA (a lower bar than many assume).
4. Consider guardianship only if the person is genuinely incapable and there is no POA and no less restrictive option — and even then, seek the narrowest, time-limited order that fits. Statutory guardianship of property (via a capacity assessment) may avoid court for financial matters; guardianship of the person always requires court.
5. Get legal advice before acting. The stakes — a person’s legal rights — are high, and mistakes (over-restricting a capable adult, or leaving a genuinely at-risk person unprotected) are costly.

Why “least restrictive” is the default. It is not just good practice — it is built into the statute: a court must not appoint a guardian if a less restrictive alternative that does not require a finding of incapacity will meet the need. This aligns the law with a dignity-of-risk approach to supporting adults.

A note on where this fits with AIM’s other guides: managing inherited or gifted money — Henson trusts, RDSPs, ODSP asset rules, trusteeship of benefits — is covered in Henson Trusts and Estate Planning for a Family Member on ODSP in Ontario and in Future & Succession Planning in Ontario: A Guide for Aging Parents of an Adult with a Developmental Disability. The broader safeguarding and dignity-of-risk practice (how to support risk-taking safely in programs) is covered in Dignity of Risk and Safeguarding in Ontario: A Guide for Families and Staff. This guide deliberately stays on decisions about the person.

A staged plan for families

Stage 1 — Before or around the 18th birthday (planning, low-cost):

• Assume capacity and identify the specific decisions that may be difficult, in each domain (property vs. personal care).
• Explore what support the adult needs to make and communicate their own decisions (plain language, extra time, accessible formats, a trusted supporter). Document these supports.
• If the adult can understand appointing a helper, make powers of attorney (property and/or personal care) using the free CLEO / Steps to Justice Guided Pathway or a lawyer. This is usually the single most protective, least restrictive step a family can take.
• Trigger to escalate: a bank, hospital, or agency refuses to deal with the informal supporter for a decision that genuinely must be made and can’t wait.

Stage 2 — If a decision must be made and no POA is possible (the person cannot grant one):

• Get legal advice on whether the person is truly incapable for that decision, and whether a one-off solution (e.g., a specific health-care SDM under the HCCA hierarchy, or trusteeship of a government benefit) avoids the need for guardianship.
• For finances only, consider statutory guardianship of property (capacity assessment + Form 2 to replace the OPGT) — faster and cheaper than court — but only if the person will undergo assessment.
• Trigger to escalate: the person refuses assessment, needs personal-care decisions made, or the situation is contested among family.

Stage 3 — Guardianship (last resort):

• Apply to the Superior Court, seeking the narrowest and, where possible, time-limited order (partial guardianship covering only the areas of incapacity). Guardianship of the person always requires court.
• Ensure the guardian understands the fiduciary duties: least restrictive action, foster independence and participation, consult and keep contact with family, keep records, and file accounts (estates over $50,000).
• Trigger to revisit or terminate: capacity is restored, circumstances change, or the guardianship is no longer necessary — any person entitled to notice can move to vary or end it.

Benchmarks that would change this guidance: (1) if Ontario passes supported decision-making legislation or otherwise implements the Law Commission of Ontario’s 2017 recommendations, the “informal only” status of SDM changes — re-check; (2) if the person’s capacity changes materially, reassess which stage applies; (3) verify current assessment fees, the OPGT review fee, and processing times before budgeting.

Grey areas and points of confusion — guardianship vs. supported decision-making

This is the area where families should understand that the law is debated and, in Ontario, largely frozen.

What supported decision-making (SDM) is, and how it differs from substitute decision-making. In substitute decision-making, someone makes the decision for the person (a guardian or attorney). In SDM, the person keeps the legal right to decide and receives support from trusted people to understand information, weigh options, and communicate — the way most people consult family and friends before big decisions. Advocates frame it as respecting legal capacity (the right to decide) as distinct from mental capacity (the functional ability to decide independently).

The CRPD Article 12 grounding (advocacy position). Article 12 of the UN Convention on the Rights of Persons with Disabilities (CRPD) — which Canada ratified — says persons with disabilities enjoy legal capacity “on an equal basis with others” and must be given access to the support they need to exercise it. In General Comment No. 1 (adopted 11 April 2014), the UN CRPD Committee interpreted Article 12 to require states to abolish substitute decision-making regimes and replace them with supported decision-making. This interpretation is an advocacy / treaty-body position, not settled domestic law: many States Parties — including Canada, which filed an interpretive declaration/reservation — reject an absolute prohibition on substitute decision-making, and the Committee’s view is contested among governments and scholars. It should be understood as a normative goal, not a description of Ontario law.

The Ontario/Canadian advocacy push (clearly labelled as advocacy). Disability-rights organizations argue Ontario relies too heavily on guardianship and should legislate SDM:

• Inclusion Canada takes the position that “imposed guardianship arrangements must be abolished everywhere in Canada” and that people must have access to legally recognized supporters and support networks.
• Community Living Ontario’s “Right to Decide” project argues guardianship “strips away people’s rights and can increase their risk of being abused and neglected.” In its April 2024 resource on SDM legislation across Canada, it concludes that “Ontario has fallen behind in recognizing and supporting the legal capacity rights of people with intellectual disabilities and other cognitive impairments” (report co-produced with Inclusion Canada, PooranLaw, and the IRIS Institute).
• ARCH Disability Law Centre advises people on SDM and on regaining control from the OPGT, and distinguishes SDM (deciding with support) from substitute decision-making (someone deciding for you).

These are principled advocacy positions, not neutral statements of what the law currently requires. They reflect real evidence of over-use of guardianship and genuine harms, but also sit within an unresolved debate (including in the mental-health and elder-care sectors) about how far to go and how to protect against abuse.

Where the law actually stands (settled fact). As of 2025–2026, Ontario has no statute that formally recognizes supported decision-making. The governing statutes remain the SDA (1992) and HCCA (1996). SDM in Ontario is informal — supporters have no statutory legal authority. The firm PooranLaw states plainly: “In Ontario, we do not currently have a supported decision-making framework recognized by the law.” By contrast, several provinces have legislated forms of it: British Columbia (Representation Agreement Act, in force since 1996), Alberta (Adult Guardianship and Trusteeship Act — supported and co-decision-making), Manitoba, Yukon, and New Brunswick (Supported Decision-Making and Representation Act — Bill 20, SNB 2022, c. 60, which received Royal Assent December 16, 2022 and was proclaimed in force January 1, 2024, replacing the Infirm Persons Act).

The Law Commission of Ontario reform (and its stall). In its landmark Final Report on Legal Capacity, Decision-making and Guardianship (released March 8, 2017) — the most comprehensive review of these laws in nearly 30 years — the Law Commission of Ontario (LCO) made 58 recommendations. The report noted these laws “affect the approximately 17,000 Ontarians who are currently subject to some kind of a guardianship order.” Notably, Recommendation 7 called on Ontario to enact supported decision-making legislation allowing people to receive help with day-to-day property and personal-care decisions while keeping decision-making power. Importantly, the LCO did not endorse the full CRPD/abolitionist model: it recommended Ontario keep its cognitive/functional capacity test, which drew criticism from some advocates as not going far enough.

Status of reform as of 2025–2026: The Ontario government has not enacted the LCO’s recommendations. There is no evidence of any bill to legislate SDM or implement Recommendation 7, and Ontario government pages still describe only guardianship, powers of attorney, and substitute decision-making. Community Living Ontario notes that Ontario’s SDM efforts “have faltered, in part, because of disagreements between stakeholders in the intellectual disability, mental health, and elder care sectors.” Bottom line: meaningful reform remains aspirational, and families must plan around the law as it is today, not as advocates hope it will become.

The core tension, held honestly. Ontario’s system tries to balance two real dangers:

• Over-restriction: stripping a capable (or partly capable) adult of the right to make their own choices — labelling a communication difference as incapacity, or imposing a broad guardianship where a narrow tool or support would do. This is a genuine, documented harm and the reason “least restrictive” is the legal default.
• Under-protection: leaving a genuinely incapable adult exposed to neglect, financial exploitation, or unsafe situations because no decision-maker is in place.

There is no formula that resolves this. The honest answer is that the right balance is case-specific, should default toward autonomy and the least restrictive option, and should be revisited as capacity and circumstances change.

How current is this, and what to double-check

This is general legal information, not legal advice. It describes Ontario law in general terms as of 2025–2026. It cannot tell you what to do in your family’s specific situation. Please consult a qualified Ontario lawyer before making or acting on any decision about capacity, powers of attorney, or guardianship. For free/low-cost help: ARCH Disability Law Centre (summary advice for persons with disabilities), CLEO / Steps to Justice (plain-language information and free POA Guided Pathways), Pro Bono Ontario (1-855-255-7256), JusticeNet, and the Law Society of Ontario Referral Service.

• Source reliability. Statutory rules and definitions here are drawn from the SDA and HCCA themselves (via Ontario’s e-Laws and CanLII) and official Ontario government / OPGT and Capacity Assessment Office publications. Process, cost, and timing details are supplemented by Ontario legal-practitioner sources (law-firm guides) and should be treated as practical estimates, not official figures — verify current fees and timelines with a lawyer or the OPGT.
• Advocacy vs. law. Positions from Inclusion Canada, Community Living Ontario, ARCH, PooranLaw, and the UN CRPD Committee’s General Comment No. 1 are advocacy or treaty-interpretation positions, clearly labelled as such. They describe where advocates want the law to go, not what Ontario law currently requires.
• Recency and staleness flags. The core statutes (SDA 1992, HCCA 1996) remain in force and have not been overhauled. The LCO Final Report is from 2017 and, as of 2025–2026, has not been implemented; if you are reading this later, check whether Ontario has since passed supported-decision-making or capacity-reform legislation, as this is the most likely area to change. The 2021 remote-witnessing rule for POAs is now permanent. Dollar figures, the ~17,000 guardianship figure (2017 LCO estimate), and processing times may drift over time. The OPGT flagged a case-management system transition in early 2026 that may temporarily affect service.
• Scope. This document covers decisions about the person. It does not cover trusts, RDSPs, or ODSP asset rules (see Henson Trusts and Estate Planning for a Family Member on ODSP in Ontario and Future & Succession Planning in Ontario: A Guide for Aging Parents of an Adult with a Developmental Disability) or safeguarding practice (see Dignity of Risk and Safeguarding in Ontario: A Guide for Families and Staff) in depth.

Related: Rights, Accessibility, and Anti-Discrimination Law for Adults with Developmental Disabilities in Ontario · Dignity of Risk and Safeguarding in Ontario: A Guide for Families and Staff · Henson Trusts and Estate Planning for a Family Member on ODSP in Ontario · Future & Succession Planning in Ontario: A Guide for Aging Parents of an Adult with a Developmental Disability