Power of Attorney in Ontario: A Complete Guide (2026)

A Power of Attorney is one of the most important legal documents an Ontario resident can have — and one of the most commonly misunderstood.

It is not about hiring a lawyer. It is about choosing a trusted person to make decisions on your behalf if you become unable to make them yourself. That person is legally called your “attorney,” but they do not need to be a lawyer. They can be a spouse, an adult child, a close friend, or anyone else you trust with that responsibility.

In Ontario, Powers of Attorney are governed by the Substitute Decisions Act, 1992. There are two types — one covering your financial affairs and one covering your health and personal care — and they are separate legal documents that work in fundamentally different ways.

This guide explains both types, what makes each valid under Ontario law, how to choose an attorney, and what happens if you do not have one in place when you need it.

The Two Types of Power of Attorney in Ontario

Power of Attorney for Property

A Power of Attorney for Property authorizes your chosen attorney to manage your financial and legal affairs. This includes:

Paying your bills and managing your bank accounts
Filing your tax returns
Managing investments, RRSPs, TFSAs, and other registered accounts
Buying, selling, or mortgaging real estate on your behalf
Entering into contracts and managing business interests
Collecting money owed to you

The critical distinction in Ontario is between a regular Power of Attorney for Property and a Continuing Power of Attorney for Property.

A regular POA for Property automatically becomes void if the grantor loses mental capacity — which is precisely when it is most needed. A Continuing Power of Attorney for Property, by contrast, remains valid even if you become mentally incapable. To be “continuing,” the document must contain specific language stating that it is valid despite any subsequent incapacity of the grantor.

For most people, a Continuing Power of Attorney for Property is the correct document to have. A regular POA for Property is typically used only for specific, limited purposes while the grantor remains capable — for example, authorizing someone to complete a real estate transaction while you are traveling.

Unless you specifically intend a limited-purpose document, your Power of Attorney for Property should be a continuing one.

Power of Attorney for Personal Care

A Power of Attorney for Personal Care authorizes your attorney to make personal care decisions on your behalf if you become mentally incapable of making them yourself. Personal care includes:

Health care decisions and consent to medical treatment
Housing and living arrangements
Nutrition and diet
Clothing and hygiene
Safety-related decisions

Unlike a Power of Attorney for Property, a Power of Attorney for Personal Care only becomes active if you lose the capacity to make personal care decisions. While you are capable, your attorney for personal care has no authority. You retain full decision-making ability over your own health and care until a capacity issue arises.

This type of Power of Attorney is separate from a will. It deals with decisions made during your lifetime, not with the distribution of your estate after death.

What Makes a Power of Attorney Valid in Ontario?

Both types of Power of Attorney must meet specific requirements under the Substitute Decisions Act to be legally valid.

Who can grant a Power of Attorney?

For a Power of Attorney for Property: the grantor must be at least 18 years old and must have the mental capacity to understand the nature and consequences of the document at the time it is executed.

For a Power of Attorney for Personal Care: the grantor must be at least 16 years old and must have the capacity to understand what they are signing.

Signing and witnessing requirements

Both types of Power of Attorney must be:

In writing
Signed by the grantor (or by another person in their presence and at their direction if the grantor is physically unable to sign)
Witnessed by two witnesses who are both present at the same time when the grantor signs

Who cannot be a witness:

The attorney named in the document or that attorney’s spouse or partner
The grantor’s spouse or partner
The grantor’s child, or a person the grantor treats as their child
Anyone under 18 years of age
Anyone receiving personal care for compensation from the grantor (such as a paid caregiver)

Choosing the wrong witness can make the entire document invalid. This is one of the most common errors in improperly prepared Powers of Attorney.

Remote witnessing

Ontario permanently permits Powers of Attorney to be signed with witnesses present by video conference. At least one witness must be an Ontario-licensed lawyer or paralegal. All parties must use original wet-ink signatures on identical physical copies of the document — electronic signatures are not valid for Powers of Attorney in Ontario under the Electronic Commerce Act, 2000.

Who Should You Choose as Your Attorney?

Choosing the right attorney is the most important decision in this process. Your attorney will have significant authority over your finances, your health, or both — depending on which document you are signing.

There is no legal requirement that your attorney be a family member, a lawyer, or any particular type of professional. However, your attorney must be at least 18 years old for property matters (there is no minimum age for an attorney for personal care, but they must be capable of acting in your best interests).

Qualities to look for in an attorney for property:

Someone you trust completely with your finances
Someone who is organized and capable of managing financial records, tax filings, and banking
Someone who is reasonably accessible and available to act when needed
Someone who is not in a conflicted financial position relative to your estate

Qualities to look for in an attorney for personal care:

Someone who understands your values, beliefs, and wishes regarding healthcare and living arrangements
Someone who will advocate for your wishes, including in difficult medical situations
Someone who can communicate clearly and firmly with healthcare providers
Someone who is emotionally capable of making difficult decisions under pressure

You can appoint more than one attorney, and you can appoint them jointly (all must agree before acting) or jointly and severally (each can act independently). You can also designate a substitute attorney in case your first choice is unable or unwilling to act.

It is strongly advisable to have a conversation with your intended attorney before completing the document. They must be willing to take on this responsibility, and they should understand what you would want in various situations.

What an Attorney Can and Cannot Do

What an attorney for property can do

Within the scope granted by the document, your attorney for property can generally do anything you could do with your own financial affairs — except make a will or make other testamentary dispositions.

Under recent amendments to the Succession Law Reform Act, an attorney for property is now authorized to remake existing beneficiary designations if the grantor’s financial plan is converted, renewed, or transferred — a practical recognition of what is sometimes necessary in long-term estate administration.

Your attorney for property has legal duties under the Substitute Decisions Act, including:

Acting in your best interests
Keeping your property and their own property separate
Keeping accounts and records of all transactions
Acting within the scope of the authority granted
Consulting with you where reasonable

Compensation for attorneys for property

An attorney for property is legally entitled to take compensation for managing your affairs under the statutory tariff in the Substitute Decisions Act. The tariff generally allows:

3% of capital and income receipts
3% of disbursements
An annual management fee of 0.6% of the average total value of assets managed

Your document can authorize a higher or lower rate, or waive compensation entirely. If you have concerns about the compensation issue, this is worth discussing with an estate lawyer when having the document prepared.

What an attorney cannot do

An attorney under a Power of Attorney for Property cannot:

Make a will on your behalf
Make a gift or loan from your property to themselves unless the document specifically authorizes it
Change the beneficiaries on your registered accounts (with the limited exception above for conversions, renewals, or transfers)
Act after your death — all Power of Attorney authority ends at the moment of death

What Happens If You Do Not Have a Power of Attorney?

If you lose mental capacity without a valid Power of Attorney in place, your family cannot automatically step in to manage your affairs or make decisions for you. Their ability to help is more limited than most people expect.

For financial matters: Banks and financial institutions generally will not allow a family member to access or manage your accounts without legal authority. In the absence of a Power of Attorney for Property, a family member or other interested person would need to apply to the Ontario court for a guardianship order. This process is significantly more time-consuming and expensive than having a Power of Attorney prepared in advance.

For personal care matters: The Health Care Consent Act, 1996 provides a hierarchy of substitute decision-makers who can consent to treatment on your behalf if you have not appointed one through a Power of Attorney for Personal Care. The hierarchy generally starts with a spouse, then adult children, then parents, siblings, and other relatives. However, if there is no one in this hierarchy available — or if family members disagree — the matter can become more complicated, and the Public Guardian and Trustee may become involved.

The practical takeaway is simple: a Power of Attorney, properly prepared in advance while you have capacity, gives you control over who makes decisions for you and under what terms. Without one, those decisions fall to a court-supervised process that costs more, takes longer, and removes that control.

How to Revoke a Power of Attorney in Ontario

You can revoke a Power of Attorney at any time — provided you have the mental capacity to do so. Capacity to revoke requires the same level of capacity as was required to grant the document.

To revoke a Power of Attorney, you must execute a Notice of Revocation in writing, with the same formalities required for the original document — that is, signed and witnessed by two qualifying witnesses.

To be effective, the revocation must be brought to the attention of the attorney and, in the case of a Power of Attorney for Property, to any relevant third parties such as banks or financial institutions who have been dealing with your attorney.

Destroying the original document without a formal revocation may not be sufficient, particularly if the attorney or third parties retain a copy. A properly executed Notice of Revocation is the appropriate step.

Power of Attorney vs. Guardianship in Ontario

A Power of Attorney is created by the grantor while they have capacity — it is a proactive planning document. Guardianship is imposed by the court after a person has already lost capacity and no valid Power of Attorney exists.

Guardianship is more restrictive, more expensive to obtain, requires ongoing court supervision, and removes autonomy that a properly prepared Power of Attorney would have preserved.

A Power of Attorney prepared in advance is almost always the better outcome for both the individual and their family. The time and cost of preparing the documents while you have capacity is a fraction of what guardianship proceedings typically cost.

Should Power of Attorney Documents Be Prepared by a Lawyer?

Ontario law does not require a lawyer to prepare a Power of Attorney. The documents can technically be prepared without one.

However, there are meaningful reasons to work with an estate lawyer when preparing these documents:

Execution requirements are specific. A document with an improper witness, missing language, or an ambiguous scope may be unenforceable precisely when it is most needed.

The documents should reflect your intentions. A lawyer can ensure the scope of authority granted aligns with what you actually want — particularly around compensation, specific transactions, and any limitations you wish to impose.

Coordination with your overall estate plan. Your Power of Attorney should work alongside your will, your beneficiary designations, and your overall intentions. A lawyer reviewing the whole picture can identify inconsistencies before they cause problems.

Peace of mind for third parties. Financial institutions, healthcare providers, and other third parties are more likely to accept a properly witnessed and clearly drafted document without delay or question.

Our Wills & Estate Planning team at Estate Law Ottawa can prepare both a Continuing Power of Attorney for Property and a Power of Attorney for Personal Care as part of a complete estate plan. Contact us to discuss your situation.

Frequently Asked Questions

What is the difference between a Power of Attorney for Property and a Power of Attorney for Personal Care in Ontario?

A Power of Attorney for Property authorizes your attorney to manage your financial affairs — bank accounts, investments, real estate, and other assets. A Power of Attorney for Personal Care authorizes your attorney to make decisions about your health care, housing, nutrition, and other personal care matters if you become incapable of making those decisions yourself. These are two separate legal documents in Ontario, and most people benefit from having both as part of a complete estate plan.

What is a Continuing Power of Attorney for Property in Ontario?

A Continuing Power of Attorney for Property is a Power of Attorney for Property that specifically remains valid even if the grantor becomes mentally incapable. The document must contain language to this effect. Without this feature, the Power of Attorney for Property becomes void upon incapacity — which is typically when it is most needed. Most estate planning lawyers recommend a Continuing Power of Attorney for Property rather than a limited one for this reason.

Who can witness a Power of Attorney in Ontario?

Two witnesses must be present at the same time when the grantor signs. Witnesses cannot be the named attorney or their spouse, the grantor’s spouse or partner, the grantor’s child, anyone under 18, or anyone receiving personal care compensation from the grantor. Choosing an invalid witness is one of the most common reasons a Power of Attorney is found to be defective.

Can I make a Power of Attorney if I am sick or elderly?

Yes — provided you have the mental capacity to understand what the document does and the consequences of signing it. Age and illness do not by themselves disqualify someone from executing a Power of Attorney. A lawyer can help assess whether capacity concerns warrant additional steps to document the signing process.

Does a Power of Attorney in Ontario need to be notarized?

No. Ontario law does not require a Power of Attorney to be notarized. It requires two qualifying witnesses. However, some institutions — particularly those outside Ontario — may request notarization for their own purposes. If you need a document recognized in another province or country, additional steps may be required.

What happens to a Power of Attorney when I die?

All Power of Attorney authority ends at the moment of death. After death, authority to deal with your estate passes to your executor under your will — or, if there is no will, to an administrator appointed by the court. An attorney under a Power of Attorney has no authority after death and cannot continue to act on behalf of the estate.

Can my attorney use my Power of Attorney to change my will?

No. An attorney under a Power of Attorney for Property cannot make or change a will on your behalf, and cannot alter the distribution of your estate at death. A will can only be made by the grantor personally, while the grantor has testamentary capacity. For information on wills, see our article on Can I Write My Own Will in Ontario.

Can I have more than one attorney in Ontario?

Yes. You can appoint multiple attorneys to act jointly (meaning all must agree before acting), jointly and severally (each can act independently), or with a specified division of responsibilities. You can also name an alternate attorney to step in if your first choice is unable or unwilling to act.

How do I revoke a Power of Attorney in Ontario?

You can revoke a Power of Attorney at any time while you have the mental capacity to do so, by executing a written Notice of Revocation with the same formalities as the original document — signed and witnessed by two qualifying witnesses. The revocation must be communicated to the attorney and to relevant third parties to be effective.

Getting Your Power of Attorney in Place

A Power of Attorney is not a document to leave for later. It can only be made while you have the mental capacity to grant it. Once that capacity is lost, the option is gone — and the alternatives are significantly more difficult for your family.

Whether you are planning ahead, updating an existing document, or dealing with a situation where a loved one may need legal support for their affairs, Estate Law Ottawa can help. Contact us to book a consultation and we will walk you through the options.

This article is provided for general informational purposes only and does not constitute legal advice. Ontario law governing Powers of Attorney is set out in the Substitute Decisions Act, 1992 and related legislation, which are subject to amendment. The information above reflects Ontario law as of September 2026. Reading this article does not create a lawyer-client relationship with J. Solomon Law Professional Corporation. Please consult a qualified Ontario estate lawyer before making decisions about Powers of Attorney or estate planning.