How a Formal Capacity Assessment Works in Ontario

Families often reach for the phrase "get them assessed" long before anyone has actually explained what that involves. A capacity assessment in Ontario is a specific, formal process governed by the Substitute Decisions Act — it is not simply a doctor's note, and it is not something one relative can order for another on a whim. Knowing who conducts it, how it gets started, and what it's actually measuring can save a family weeks of confusion at an already stressful time.

This article walks through the process at a general level. Because capacity disputes often involve sensitive medical and family details, and because the right path differs by situation, treat this as a starting point for a conversation with a lawyer — not a substitute for one.

What a Capacity Assessment Actually Tests

Capacity isn't a single, all-or-nothing status. A formal assessment looks at whether a specific person can understand and appreciate the specific decision at hand — for example, managing their finances, or deciding where to live. Someone can be found capable of some decisions and not others, and a diagnosis such as dementia does not, by itself, mean a person is incapable; the question is always tied to the particular decision being assessed, at the time it's being assessed.

Who Can Conduct a Capacity Assessment

Under the Substitute Decisions Act, formal capacity assessments for the purposes recognized by the Act are carried out by qualified capacity assessors — professionals with specific training and authorization for this role, not simply any physician or the family's regular doctor. A family doctor's general opinion may be useful context, but it is generally a different thing from a formal capacity assessment under the Act.

How an Assessment Gets Requested

A capacity assessment can be initiated in more than one way, depending on the circumstances — for example, as part of a dispute about whether an existing arrangement should continue, in connection with a statutory guardianship, or as one part of a broader legal proceeding. Because the right route depends heavily on the facts, this is an area where getting advice before you act tends to save time.

Can Someone Be Forced to Undergo an Assessment?

Generally, no — a capable-seeming adult typically cannot be compelled into a capacity assessment simply because a family member wants one. There are narrower circumstances where an assessment can proceed without the person's active agreement, such as under a court order or specific statutory conditions, but this is not the default. If you're facing resistance from the person you're concerned about, that resistance itself is a reason to get legal advice about your actual options, rather than assuming the assessment can simply be scheduled.

What Happens During the Process

While the exact steps vary by assessor and situation, a formal capacity assessment generally follows a similar pattern:

1. Referral or request. The assessment is requested through an appropriate channel for the circumstances, rather than simply booked like a routine appointment.
2. Scheduling and disclosure. The assessor explains the purpose of the assessment, and — except in the narrow circumstances noted above — the person being assessed must generally understand and agree to take part.
3. The assessment itself. The assessor meets with the person, typically more than once, using structured questions and observations tied to the specific decision-making capacity in question.
4. Additional information gathering. The assessor may speak with family members, caregivers, or health providers, and review relevant records, to build a fuller picture.
5. A written opinion. The assessor produces a formal finding on the specific capacity question they were asked to assess.

What a Capacity Assessment Costs

There is no fixed government fee for a capacity assessment — assessors set their own rates individually, and costs can vary depending on the assessor, the complexity of the assessment, and the region. Ask any assessor for a clear, written quote before booking, and confirm that their qualifications and process match what your specific situation calls for (a court application, for instance, may have its own requirements for what the assessment needs to cover).

After the Assessment: What the Findings Mean

A finding of incapacity for a specific decision doesn't automatically strip someone of every legal right, and it isn't necessarily permanent — capacity can be reassessed later if circumstances change. What happens next depends on what triggered the assessment in the first place: it might support a statutory guardianship, factor into a court application, or simply confirm that an existing Power of Attorney should now be relied on for that decision.

Frequently asked questions