Power of attorney and substitute decision-making for aged care in Ontario

One of the most consequential things a family can do before a health crisis, not during one, is get clear on who can legally make personal care decisions if a parent can no longer decide for themselves. Most families never think about this until they’re in a hospital hallway trying to figure it out under pressure.

Why this matters before it’s needed

A power of attorney for personal care is a legal document naming someone to make health and living decisions, everything from medical treatment to where someone lives, if that person becomes incapable of deciding for themselves. Without one in place, decisions default to Ontario’s automatic hierarchy of substitute decision-makers, which usually works but can create confusion or disagreement among family members who assumed someone else had authority, or didn’t expect to share it.

Setting this up while a parent is still capable of expressing their own wishes means the decision reflects what they actually want, not what the family guesses under pressure later.

What the document actually covers

A power of attorney for personal care can address consent to medical treatment, decisions about long-term care or retirement home placement, end-of-life care preferences, and day-to-day living decisions if capacity is lost. It’s a separate document from a power of attorney for property, which covers finances, and many families set up both together since the same conversations tend to come up at the same time.

If nothing is set up

Ontario’s Health Care Consent Act provides an automatic list of substitute decision-makers if no one has been named. It generally starts with a spouse or partner, then children, then parents, siblings, and other relatives, in a specific order. This works reasonably well in straightforward families, but it can create real friction when several children are equally ranked and disagree about a parent’s care, or when family relationships are complicated.

Setting it up

Step	What it involves
Have the conversation early	Discuss wishes and preferences while the person is still capable of expressing them clearly
Choose the right person or people	Consider who can act calmly under pressure and who the person actually trusts with these decisions
Put it in writing	Ontario has specific requirements for a valid power of attorney for personal care document
Share copies	Give copies to the named attorney, family doctor, and any care providers involved
Revisit it periodically	Circumstances and relationships change; the document should be reviewed occasionally, not treated as permanent

What happens without a named attorney and no clear family consensus

The automatic hierarchy works well until it doesn’t. If two children are equally ranked as substitute decision-makers and disagree about whether a parent should move into long-term care, there’s no built-in tiebreaker beyond working it out between them or, in a genuine standoff, applying to Ontario’s Consent and Capacity Board to resolve the dispute. This is a slow, stressful, and avoidable process. A named power of attorney, chosen deliberately by the parent while capable, sidesteps this entirely by giving one person, or a clearly defined group, the authority everyone already agreed to in advance.

This is general information, not legal advice

Every family’s situation is different, and the requirements for a valid power of attorney document in Ontario are specific. A lawyer can help make sure the document reflects your family’s wishes and meets the legal requirements, particularly if there’s any complexity around who should be named or how decisions should be shared.

Getting ahead of it

The families who navigate a care crisis most smoothly are usually the ones who had this conversation before it was urgent. If you’re already researching aged care options in London, this is worth handling at the same time.

A power of attorney document also matters once care actually begins, since agencies, retirement homes, and long-term care homes will often ask to see it before involving anyone other than the resident directly in care planning conversations. Having it ready, rather than scrambling to produce it partway through an admission process, keeps things moving smoothly at a point when families are already managing enough. Once someone is admitted, understanding resident rights matters just as much as having the paperwork in order; our guide to resident rights and inspection reports covers what protections apply from day one. Our home page covers the full range of local care options, and our methodology explains how we evaluate the providers listed on the site.