A power of attorney in Ontario is a legal document that lets you name someone you trust to make decisions for you if you cannot make them yourself. You stay in control while you are capable. The document only matters when life takes a turn you did not plan for, such as a stroke, a serious accident, or a slow decline like dementia.
Most people put this off. A 2025 national report found that only about 24 percent of Canadians have power of attorney documents in place, and a separate survey found that almost half of adults lack a power of attorney for personal and medical care. That gap is a problem, because without these documents your family cannot simply step in. They often end up in court instead.
This guide walks you through both types of power of attorney under Ontario law, who can act, how to sign one correctly, and what happens if you skip it. The rules come from the Substitute Decisions Act, 1992, the main statute that governs powers of attorney in the province. If you want to plan the rest of your affairs too, start with our overview of estate planning in Ontario.
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What is a power of attorney?
A power of attorney gives another person legal authority to act for you. The person who signs the document is the grantor. The person you appoint is your attorney. Your attorney does not need to be a lawyer. Most people choose a spouse, an adult child, a sibling, or a close friend.
Ontario law splits this authority into two separate documents. One covers your money and property. The other covers your health and personal care. You need both for full protection, because one document cannot do the job of the other.
Your attorney owes you a fiduciary duty. That is the highest standard of trust the law recognizes. Your attorney must act honestly, in your best interests, keep your money separate from theirs, keep records, and avoid using your property for personal gain.
The two types of power of attorney in Ontario
Ontario recognizes two main powers of attorney under the Substitute Decisions Act, 1992.
- Continuing Power of Attorney for Property. This covers financial and property decisions and keeps working even after you lose mental capacity.
- Power of Attorney for Personal Care. This covers health care, housing, food, clothing, hygiene, and safety. It only takes effect when you can no longer make a given decision yourself.
There is also a plain general (non continuing) power of attorney for property. It ends the moment you lose capacity, so it is useful only for short term needs, such as letting someone handle a sale while you travel. For real protection, you want the continuing version.
Quick comparison
| Feature | Continuing POA for Property | POA for Personal Care |
| What it covers | Bank accounts, bills, investments, real estate | Health care, housing, meals, clothing, safety |
| Minimum age to sign | 18 | 16 |
| When it takes effect | As soon as it is signed and witnessed, unless you delay it | Only when you become mentally incapable of the decision |
| Witnesses needed | Two eligible witnesses | Two eligible witnesses |
| Governing law | Substitute Decisions Act, 1992 | Substitute Decisions Act, 1992 |
Continuing power of attorney for property
A continuing power of attorney for property lets your attorney manage your finances. The word continuing matters. It means the authority keeps working even if you lose the ability to manage your own money. That is the whole point of the document.
What your property attorney can do
If you do not set limits, your attorney can do almost anything with your property that you could do yourself, with one exception. They cannot make or change your will. Typical tasks include the following.
- Pay your bills and everyday expenses
- Collect money owed to you and deposit your income
- Manage, rent, maintain, or sell your home
- Handle your bank accounts and investments
- File and pay your taxes
You can narrow these powers. You can tell your attorney not to sell your home, for example, or limit them to one specific account. A lawyer can write these limits clearly so a bank will accept the document without a fight.
Legal requirements and validity
For a continuing power of attorney for property to be valid in Ontario, all of the following must be true.
- You are at least 18 years old when you sign.
- You are mentally capable of making the document.
- The document is in writing and names it as a continuing power of attorney, or clearly says the authority continues through incapacity.
- You sign it in front of two eligible witnesses, who also sign.
Ontario does not force you to use a government form. You can download a free kit from the Ontario government, but the wording on a continuing power of attorney for property decides how much power your attorney has and when. Small drafting mistakes cause real delays at the bank. Many people ask a lawyer to draft it for this reason.
When does it take effect?
Your attorney can use a continuing power of attorney for property as soon as you sign it and the witnesses sign, unless you write something different into the document. You can state that it only starts when a doctor or capacity assessor confirms you are incapable. A delayed start gives you more control, but it can also slow your attorney down in an emergency, so weigh both sides.
How much mental capacity do you need to sign it?
The law sets a clear test. To make a continuing power of attorney for property, you must understand all of the following.
- What property you own and roughly what it is worth
- Your obligations to the people who depend on you financially
- That you are giving your attorney the power to do almost anything with your property
- That your attorney must account for the decisions they make
- That you can cancel the document while you stay mentally capable
- That your property could lose value if your attorney manages it poorly
- That there is always a risk your attorney could misuse their authority
Changing or cancelling your property power of attorney
Your wishes can change, and so can your relationships. While you are mentally capable, you can cancel or replace your continuing power of attorney for property at any time. To cancel it, you sign a written revocation that says you are revoking the document. The revocation needs the same kind of signing and witnessing as the original.
Tell anyone holding a copy, such as your bank, that you have revoked it. A new power of attorney does not automatically pull old copies out of circulation. Clear communication prevents an out of date document from being used.
Power of attorney for personal care
A power of attorney for personal care lets someone you trust make decisions about your health and daily life when you cannot. This covers medical treatment, where you live, the care you receive, your meals, your clothing, your hygiene, and your safety.
Tell your attorney what you would want before a crisis. Some people make it clear that they do not want life support if there is no real hope of recovery. Others have strong views on care homes, specific treatments, or religious practices. Your attorney can only honour your wishes if they know them.
Legal requirements and validity
A power of attorney for personal care is valid in Ontario when all of the following are true.
- You are at least 16 years old when you sign.
- You are capable of making the document. The bar here is lower than the bar for actual care decisions, so you can be capable of granting this document even if you struggle with some daily choices.
- The document is in writing and signed by you.
- Two eligible witnesses watch you sign and then sign themselves.
When does it take effect?
A power of attorney for personal care sits dormant while you can make your own decisions. It only switches on for a specific decision when you become mentally incapable of making that decision. Your attorney does not override you while you are capable, and they do not replace your doctors. They give or refuse consent based on your wishes and your best interests.
Changing or cancelling your personal care power of attorney
As long as you stay capable, you can change or cancel your power of attorney for personal care whenever you want. Your beliefs about treatment may shift over the years, and the document should keep up. To cancel it, sign a written revocation, witnessed the same way as the original, that says you are revoking the document.
Who can witness a power of attorney?
Both types of power of attorney need two witnesses who watch you sign and then sign themselves. This is where do it yourself documents often fail, because the law bars several obvious people from acting as witnesses. The following people cannot witness your power of attorney.
| Cannot act as a witness | Why the law excludes them |
| Your attorney, or your attorney’s spouse or partner | They benefit from the document, so they are not neutral |
| Your own spouse or partner | Too close to the decision to confirm it freely |
| Your child, or someone you treat as your child | A likely beneficiary with a personal interest |
| Anyone whose property is under guardianship, or who has a guardian of the person | They may not have the legal capacity to witness |
| Anyone under 18 | Minors cannot serve as witnesses for this purpose |
Since 2021, Ontario also allows remote signing over video. If you sign by video, at least one of your two witnesses must be a lawyer or a licensed paralegal, and the signatures must happen at the same time. A notary public or commissioner of oaths can also help confirm a proper signing when you need it.
Who should you choose as your attorney?
Pick someone you trust without reservation. This person will see your finances or your medical wishes up close, often at a hard moment. Look for these traits.
- Honesty and a track record of acting in your interest
- Comfort with money and paperwork, for a property attorney
- The time and willingness to take on the role
- The ability to stay calm and make hard decisions under stress
Talk to the person first. Nobody should learn they are your attorney after the fact. Make sure they understand the job and agree to it. You should never feel pressured to name a particular person. If no one feels right, you can name a trust company for property matters, or speak with a lawyer about your options.
If you and your chosen attorney want fully independent confirmation that you understood and freely signed the document, independent legal advice adds a strong layer of protection against later challenges.
Naming more than one attorney
You can name more than one person. You can also name a backup, called a successor attorney, who steps in if your first choice cannot act. When you name two or more attorneys, you must decide how they work together.
- Jointly. They must agree and act together on every decision. This builds in a check, but it can cause a deadlock if they disagree, and it slows things down when one is away.
- Jointly and severally. Each can act alone. This is faster and more flexible, but it relies on strong trust and good communication, since one attorney can act without checking with the other.
If you appoint more than one attorney, you can also write in a tie breaker, such as a majority decision, so a disagreement does not freeze your affairs. Whatever you choose, spell it out clearly in the document.
What happens if you do not have a power of attorney?
Many people assume a spouse or an adult child can automatically take over. That is not how Ontario law works. Without the right documents, your family has no automatic authority over your money, and the process to get it is slow and costly.
With no property power of attorney
If you lose capacity and have no continuing power of attorney for property, someone must apply to become your guardian of property, or the Office of the Public Guardian and Trustee may step in to manage your finances. Guardianship means a court application, a management plan, legal fees, and often months of delay, all at a stressful time for your family.
With no personal care power of attorney
If you have no power of attorney for personal care, Ontario law turns to a ranked list of substitute decision makers for your health care, set out in separate health consent legislation. A relative usually ends up making the call, but it may not be the person you would have chosen, and the ranking may not match your wishes. For bigger personal care decisions, your family may again have to seek guardianship through the court.
Either way, the path runs through the courts and the probate and estate system far more than it needs to. A signed power of attorney keeps these decisions with the people you chose, not with a process you never wanted.
How to make a power of attorney in Ontario
You can set up both documents with a few clear steps.
- Decide which documents you need. Most people sign both a continuing power of attorney for property and a power of attorney for personal care.
- Choose your attorney, and a backup, and confirm they agree to act.
- Decide on any limits, conditions, or instructions you want to include.
- Put it in writing. Use a lawyer drafted document or, for simple situations, the free Ontario government kit.
- Sign in front of two eligible witnesses, who sign in your presence.
- Store the originals safely and tell your attorney where to find them. Give a copy to your bank if your attorney will deal with it.
A power of attorney is one piece of a larger plan. Pairing it with a will and a clear estate plan gives your family a full set of instructions. Our wills and estates team in Toronto can prepare these documents together so they fit one another.
How an attorney resigns
An attorney can step down. If they have already started acting under the power of attorney, the resignation only becomes effective once they deliver a copy of it to the right people. These include the following.
- You, the grantor
- Any other attorneys named in the same document
- Any substitute attorney named in the document
- In some cases, your spouse or partner and your close relatives in Ontario, if the attorney believes you are incapable of managing property and no substitute is willing to act
A resigning attorney also has to take reasonable steps to wrap up. If they registered the document with your bank, they tell the bank. If they dealt with your care home, they tell the home. If your document names no substitute attorney, the power of attorney ends when that attorney resigns, which is exactly why a backup matters.
Common mistakes to avoid
- Using disqualified witnesses. A spouse or child signing as a witness can sink the whole document.
- Waiting too long. You must be mentally capable to sign. Once capacity is gone, it is too late, and your family is left with guardianship.
- Naming only one attorney with no backup. If your sole attorney cannot act, the document can fail entirely.
- Vague wording. Unclear powers lead to banks refusing the document or attorneys disagreeing.
- Never telling anyone. A perfect document helps no one if your attorney cannot find it.
People treat a power of attorney as paperwork for old age. I treat it as insurance. A car accident at 30 can take your capacity as fast as illness at 80. The document is cheap. Going to court without one is not. Demet Altunbulakli, Founding Lawyer
Frequently asked questions
Does a power of attorney let someone take my money while I am still capable?
It depends on the document. A continuing power of attorney for property can take effect as soon as you sign it, so your attorney could act right away unless you delay the start date. You can write in that it only begins when a doctor or assessor confirms you are incapable. Even when it is active, your attorney owes you a fiduciary duty and must act in your interest.
Do I need a lawyer to make a power of attorney in Ontario?
No, the law does not require a lawyer, and free government forms exist. That said, the wording controls how much power your attorney has and whether banks will accept the document. For anything beyond the simplest situation, a lawyer drafted document prevents costly problems later.
Is a power of attorney the same as a will?
No. A power of attorney works while you are alive but unable to act for yourself. A will only takes effect after you die. The two documents do not overlap, and you need both for a complete plan. Your power of attorney ends at your death, when your will and estate trustee take over.
Can my attorney make medical decisions for me?
Only if you sign a power of attorney for personal care naming them. A property document does not cover health care. A personal care attorney can give or refuse consent to treatment once you are incapable of that decision, based on your known wishes and best interests.
Does my Ontario power of attorney work in other provinces or countries?
Not always. Other provinces and countries have their own rules, and they may not recognize an Ontario document, especially for personal care. If you spend significant time elsewhere or own property in another jurisdiction, get local advice and consider a separate document there.
Can I cancel my power of attorney later?
Yes. While you are mentally capable, you can cancel or replace either document at any time. Sign a written revocation, witnessed the same way as the original, and tell anyone holding a copy, such as your bank, that the old document no longer applies.
The information provided above is of a general nature and should not be considered legal advice. Every transaction or circumstance is unique, and obtaining specific legal advice is necessary to address your particular requirements. Therefore, if you have any legal questions, it is recommended that you consult with a lawyer.
