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№ 22 Wills & Estates

Can You Challenge a Joint Account Claimed After a Parent's Death in Ontario?

Learn how Ontario law treats a joint account after a parent dies, when an adult child may hold it in trust for the estate, and how a dispute is approached.

Wills & Estates4 min readTSLBy the Treadstone Law Team · OntarioUpdated November 13, 2026
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Key takeaways
  • Property that passes by survivorship goes to the surviving owner and not into the estate, even if there is a will.
  • An adult child added to a parent's account without paying for it is presumed to hold it in trust for the parent and, on death, for the estate.
  • The outcome turns on what the parent intended when the account was set up, so evidence matters.

A parent dies, and you learn that a sibling was on their bank account and has taken the balance. The will says the estate is to be shared, but the money never reached the estate. It is natural to ask whether that can be right.

Sometimes it is, and sometimes it is not. The answer depends on what the parent meant when the account was opened or the child was added. This article explains the general rules in Ontario and the kinds of evidence that usually matter.

Why a joint account can bypass the will

Property passes to the estate trustee (personal representative) only if no one else has a right to take it by survivorship. Property that does pass by survivorship goes straight to the surviving owner, whether or not there is a will. A deceased joint tenant's interest goes to the surviving joint tenant, not to the beneficiaries named in the will.

Many joint accounts carry a right of survivorship, so the surviving holder becomes the account owner. That is why the balance may never have appeared in the estate's list of assets.

The presumption that can work in the estate's favour

For gratuitous transfers, the presumption of resulting trust is the general rule, and the person receiving the transfer has the onus of showing a gift was intended. An adult child added to a parent's account or asset without paying for it is presumed to hold it in trust for the parent and, on death, for the estate.

There is an exception for minor children. The presumption of a gift is confined to minor children, and an adult child's financial dependency does not trigger it, although dependency can be strong evidence against a resulting trust.

Between spouses the rules differ. Money on deposit in both spouses' names is deemed held as joint tenants.

What evidence can show the parent's intention

Courts may look at several things when deciding what the parent intended at the time of the transfer. Later evidence can be considered if it is relevant to that intention.

Survivorship rights vest when the account is opened, so a gift is made during life, and what is gifted is the survivor's interest in the balance at death. Heirs may challenge the survivor, who may then need to show the parent intended the funds as a gift.

Other routes and practical limits

A joint asset the survivor holds on resulting trust for the estate does not escape estate administration tax, because the estate value includes property held in another person's name.

If you were a dependant, a separate route may exist. A dependant is a spouse, parent, child, or brother or sister whom the deceased was supporting, or was legally obliged to support, immediately before death. For a support claim, money deposited in an account in the deceased's name and another person's is deemed part of the net estate. Only the portion that belonged to the deceased immediately before the deposit is counted. The dependant must prove the funds belonged to the deceased.

Timing matters. No support application may be made more than six months after the certificate of appointment is granted. The court may allow an application at any time for any part of the estate still undistributed. Also, payments by a bank can still be made unless a certified copy of a suspensory order has been personally served on it.

What to do next

Each case turns on its own facts, so a lawyer can tell you how strong a claim is and which step to take first.

Frequently asked questions

Does a joint account always belong to the survivor?

No. Many joint accounts carry survivorship, but an adult child who was added without paying is presumed to hold the funds in trust for the parent and the estate. The survivor may need to show a gift was intended.

Does the will control a joint account?

Not if the account passes by survivorship. Survivorship property goes to the surviving owner whether or not there is a will.

What evidence helps show what the parent meant?

Courts may consider the bank documents, who controlled and used the funds, any power of attorney, and the tax treatment of the account. Later evidence can count if it speaks to the parent's intention at the time.

Is there a time limit?

A dependant support application cannot be made more than six months after the certificate of appointment is granted, though undistributed estate property may still be reachable. Other claims may have their own limits, so get advice promptly.

Sources

Links go to official government, court and regulator pages. The law changes — confirm you are reading the current version.

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.

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