TREADSTONE LAW · ONTARIO · DIGITAL LEGAL SERVICES · EST. MMXXI ·TSL
Home/Articles/Wills & Estates
№ 84 Wills & Estates

Mental Health Decisions and Your Ontario Power of Attorney for Personal Care

Learn how a mental health personal care POA Ontario works for psychiatric treatment, capacity decisions, and naming a trusted attorney under Ontario law.

Wills & Estates5 min readTSLBy the Treadstone Law team · OntarioUpdated 2026-06
All articles
Key takeaways
  • Under the Substitute Decisions Act and the Health Care Consent Act, legal capacity is decision-specific and moment-specific.
  • A Power of Attorney for Personal Care is a document you sign while capable that names a trusted person (your attorney) to make personal care decisions on your behalf if you later become…
  • One of the most valuable — and underused — features of a personal-care POA is the ability to include specific advance instructions about what you want or do not want during a future…

If you live with a mental health condition — or you're a family member watching someone you love navigate episodes of crisis — you've probably wondered: who makes decisions if things get serious? What happens if a psychiatrist finds them incapable? Can a document signed today actually protect someone during a future episode? These are exactly the kinds of questions a mental health personal care POA Ontario residents should understand before a crisis arrives, not during one.

Having a Mental Health Condition Does Not Mean You Lack Capacity

This is one of the most important — and most misunderstood — points in Ontario law.

Under the Substitute Decisions Act and the Health Care Consent Act, legal capacity is decision-specific and moment-specific. A person can be fully capable of making their own treatment decisions even if they have been diagnosed with a serious psychiatric condition. The test is the same for everyone: can the person understand the information relevant to the decision, and can they appreciate the reasonably foreseeable consequences of making — or not making — that decision?

A diagnosis alone never strips someone of legal capacity. A person with bipolar disorder, schizophrenia, or major depression may be fully capable of consenting to or refusing psychiatric treatment. A capacity finding must be made by a qualified health practitioner in relation to a specific decision at a specific time.

This matters because it means that when you are capable — even temporarily between episodes — your instructions and choices carry full legal weight.

What a Personal-Care POA Can Cover in a Psychiatric Context

A Power of Attorney for Personal Care is a document you sign while capable that names a trusted person (your attorney) to make personal care decisions on your behalf if you later become incapable of making those decisions yourself.

In a mental health context, a personal-care POA can authorize your attorney to:

What it cannot do is addressed below — but the key point is that a thoughtfully drafted personal-care POA is one of the most powerful tools available to a person with an episodic mental health condition.

Advance Instructions: The "Ulysses Clause" Concept

One of the most valuable — and underused — features of a personal-care POA is the ability to include specific advance instructions about what you want or do not want during a future episode of incapacity.

Practitioners and courts sometimes call these "Ulysses agreements" or "Ulysses clauses," borrowing from the myth of Odysseus tying himself to the mast. The idea is that when you are well, you can make binding choices about your future care that reflect your values and past experiences — choices that may be difficult to express clearly when you are unwell.

Examples of instructions people include:

Important limitation: The Health Care Consent Act permits health practitioners to follow expressed wishes, but it also provides that an attorney cannot give instructions that would require a health practitioner to act contrary to their professional obligations or to provide care that is not therapeutic. A practitioner who believes a particular instruction cannot ethically be followed may decline — so these clauses work best when they are discussed in advance with your care team as well as your attorney.

The Mental Health Act: A Separate Pathway

A personal-care POA does not replace or override the involuntary admission process under the Mental Health Act.

When a physician completes an application to detain someone for a psychiatric assessment, that is an independent legal mechanism rooted in public safety and the person's need for examination. An attorney under a personal-care POA cannot block an involuntary admission that is lawfully authorized under the Mental Health Act.

However, once a person is admitted — voluntarily or involuntarily — and a health practitioner finds them incapable of making treatment decisions, the personal-care attorney steps in to make those decisions. Being involuntarily detained does not transfer consent authority to the hospital; consent is still required for treatment. If the patient is incapable, the attorney is the substitute decision-maker.

Community Treatment Orders, which allow supervised treatment in the community for eligible patients under the Mental Health Act, also operate independently — but again, the personal-care attorney plays a key role in consenting to treatment conditions if the patient is incapable.

The Consent and Capacity Board

The Consent and Capacity Board is a specialized tribunal that is especially active in psychiatric settings. Its roles include:

  1. Reviewing findings that a person is incapable of making treatment decisions
  2. Reviewing whether an attorney or other substitute decision-maker is complying with their obligations
  3. Reviewing applications related to Community Treatment Orders
  4. Ensuring patients receive rights advice when their capacity is questioned

If you or someone you care for is involved in a psychiatric admission and a capacity finding is made, the Consent and Capacity Board is often the fastest route to have that finding reviewed. The timeline is tight — as of writing, hearings are typically scheduled within days of an application, but you should verify current procedures with a lawyer or the Board directly.

Why This Document Matters Especially for Episodic Conditions

People with episodic conditions — periods of full capacity alternating with periods of reduced capacity — are in a unique position. During a window of full capacity, you can create a legal document that will speak for you when you need it most.

Without a personal-care POA, decisions may be made by a family member you would not have chosen, or by a series of substitute decision-makers in a priority hierarchy set out in the Health Care Consent Act — a hierarchy that may not reflect your actual relationships or wishes.

With a personal-care POA, you choose your attorney, you can set out what matters to you, and you reduce the risk of conflict between family members or between family and your care team during an already-difficult time.

Practical Steps

Getting this right takes some preparation:

  1. Talk to your mental health care providers. Share your wishes about specific treatments while you are well. This creates a clinical record that supports your advance instructions.
  2. Choose your attorney carefully. This person will have significant authority during periods when you are incapable. They should understand your values, your history with treatment, and your preferences.
  3. Be specific in the document. General authority to "make health decisions" is valid, but naming specific wishes — within the limits described above — gives your attorney real guidance and reduces guesswork.
  4. Have the document drafted by a lawyer. The Substitute Decisions Act has formal execution requirements. A document that is not properly witnessed is invalid when you need it most.
  5. Tell people where to find it. Your attorney, your family physician, and your primary psychiatric care team should all know the document exists and how to access it.
This article is general information, not legal advice. Reading it does not create a lawyer-client relationship. Ontario laws, tax rates, and government programs change, and how the law applies depends on your specific facts. For advice about your situation, speak with a licensed Ontario lawyer. Treadstone Law is licensed by the Law Society of Ontario — reach us at 1-844-900-1070 or start a file online.

This is a wills & estates question

Start a file online — flat, published fees, reviewed by a licensed Ontario lawyer before a dollar is owed.

ContactStart a File →