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Unequal Inheritance Among Siblings in Ontario: Your Options

Got a smaller share than a sibling? See what Ontario options exist, from dependant support claims to holding the estate trustee to account.

Wills & Estates5 min readTSLBy the Treadstone Law Team · OntarioUpdated November 6, 2026
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Key takeaways
  • Some unequal outcomes come from assets that pass outside the estate, such as joint property and beneficiary designations.
  • A dependant's support claim must generally be made within six months from the grant of probate or administration.
  • An estate trustee can be compelled to account, and in some cases removed, when there are concerns about how the estate is handled.

Finding out that a brother or sister received more than you from a parent's estate hurts, whatever the reason. You may wonder whether it was deliberate, whether someone pressured your parent, or whether the estate is being handled properly.

An unequal result is not automatically unlawful, and it is not automatically fair either. This article explains where unequal outcomes come from, which claims people commonly raise, and which time limits and court routes are set out in Ontario law.

Why siblings end up with different amounts

Before assuming the will is the cause, check what actually passed through the estate. Some assets never become part of it. Jointly owned assets that pass automatically to the other owner, and RRSPs, RRIFs, TFSAs and pension plans with a beneficiary designation, are excluded from the estate's value for Estate Administration Tax. A surviving joint tenant of land registers title by survivorship, not through probate.

Whether a particular joint account was meant as a gift or only as a convenience is a legal question that depends on the evidence. A lawyer can tell you whether it is worth raising.

Common grounds people raise

Two concerns people often raise are whether the person making the will understood what they were signing, and whether someone pressured them into it. Which kind of challenge, if any, is open to you depends on the facts of your situation, so it is worth confirming with a lawyer.

Time limits and the right to start a challenge depend on the specific claim, so see a lawyer promptly rather than waiting. Acting early also helps preserve documents and witnesses.

A support claim as a dependant

Ontario law lets some dependants apply for support from an estate if the deceased did not make adequate provision for their support. For example, an unmarried partner who cohabited for at least three years, or who cohabited in a relationship of some permanence and is a parent of a child with the deceased, can apply under Succession Law Reform Act s. 58. Whether a grown child can apply as a dependant depends on your situation, so it is worth confirming with a lawyer.

PointWhat the rule says
DeadlineWithin six months from the grant of letters probate or administration.
Late applicationsThe court may allow one at any time for any portion of the estate still undistributed.
Effect on distributionOnce served with notice, the personal representative must not distribute until the application is disposed of, unless all persons entitled to apply consent or the court orders otherwise.

Holding the estate trustee to account

Even when the will itself is sound, you can ask questions about how the estate is run. No Ontario law requires an estate trustee to pass accounts at fixed intervals, but the court can compel it at the request of a person with an interest, such as a beneficiary or creditor. On a passing, the judge may make a full inquiry into the whole estate and look into complaints of misconduct, neglect or default.

What to do next

Frequently asked questions

Is it legal for a parent to leave one child more than another?

An unequal split is not automatically a legal problem. Whether a challenge is open to you depends on the facts, such as how the will was made and what the deceased provided for dependants. One claim the law does provide is a support application by a dependant where the deceased did not make adequate provision for their support. A lawyer can review your facts.

How long do I have to make a dependant's support claim?

The application must be made within six months from the grant of letters probate or administration. The court may allow a late application for any portion of the estate still undistributed.

Can the estate be paid out while a support claim is pending?

Once the personal representative is served with notice of the application, they must not distribute until it is disposed of, unless everyone entitled to apply consents or the court orders otherwise.

Can I make the executor show me the accounts?

No fixed schedule applies, but the court can compel accounts at the request of a person with an interest, such as a beneficiary. The judge may then look into complaints of misconduct, neglect or default.

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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