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Adopted Children and Intestacy: Inheritance Rights in Ontario

Do adopted children inherit equally when there is no will? See how Ontario's intestacy rules treat adopted and formerly adopted children and families.

Wills & Estates4 min readTSLBy the Treadstone Law Team · OntarioUpdated November 6, 2026
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Key takeaways
  • From the adoption order, an adopted child is the child of the adoptive parent for all purposes.
  • The same adoption order ends the child's legal relationship with the former parent, except where that person is the adoptive parent's spouse.
  • Interests that had indefeasibly vested before the adoption order was made are not affected by the adoption rule.

Families with adopted children often ask a simple question when someone dies without a will: does everyone share equally? The short answer is that Ontario law generally treats an adopted child as the child of the adoptive parent, but there are details that matter.

This article explains how adoption fits into the intestacy rules, what happens to ties with birth family, and the exceptions that can change the result.

The basic rule: adopted children are children

From the date of the adoption order, an adopted child is the child of the adoptive parent. All relationships, including those with relatives, are determined on that basis for all purposes. For intestacy, that means an adopted child steps into the same position as any other child of the adoptive parent.

Parentage is not tied to marriage either. A person is the child of their parents under the Children's Law Reform Act, whether or not the parents were married, and the Succession Law Reform Act also counts relationships traced through a person born outside marriage.

What happens to the link with birth parents

The adoption order works in both directions. The adopted child stops being the child of the former parent, except where that person is the adoptive parent's spouse. In plain words, an adopted child generally does not inherit from a birth parent who dies without a will, and the birth parent's relatives are no longer treated as the child's relatives.

Whose estateHow the adopted child is treated
The adoptive parent's estateAs the adoptive parent's child.
The former (birth) parent's estateNo longer that parent's child, unless that person is the adoptive parent's spouse.
An adoptive parent's other relativesRelationships are determined on the basis that the child belongs to the adoptive family.

If an adoption involved a step-parent, the exception for the adoptive parent's spouse is the one to look at. Because the facts of each family are different, a lawyer can confirm how the rule applies to yours.

How adopted children share in an intestate estate

Once an adopted child counts as a child, the ordinary intestacy rules apply. These are some of the points that follow.

That means an adopted child and a child born to the same parent generally take equal shares. If there are no spouse or descendants, the estate goes to the parents equally or to the surviving parent, and then to brothers and sisters, with half-blood relatives inheriting equally with whole-blood relatives of the same degree. Because adoption determines all relationships, family lines are traced through the adoptive family.

Exceptions and traps

If a will exists but does not deal with everything, the intestacy rules can still apply to the part it leaves out. Whether the wording of a will includes or excludes an adopted child is a separate question, and a lawyer should review it.

What to do next

Where there is no will, the spouse or common-law partner usually has the first right to apply to administer the estate, followed by close adult relatives.

Frequently asked questions

Does an adopted child inherit equally with biological children?

Generally yes, as far as the adoptive parent's estate is concerned. From the adoption order, the adopted child is the child of the adoptive parent for all purposes. Equal sharing among children then follows from the intestacy rules.

Can an adopted child inherit from a birth parent?

Usually not on an intestacy. The adopted child stops being the child of the former parent, except where that person is the adoptive parent's spouse. A will is a different matter and its wording would need to be reviewed.

Does it matter if the child's parents were never married?

No. Parentage is set by the Children's Law Reform Act and does not depend on whether the parents were married.

What if an adopted child is under 18?

The applicant must serve the Office of the Children's Lawyer when a beneficiary is under 18. A share over $35,000 is paid into court until the child turns 18, while a smaller share can be paid to the parent the child lives with or the person with lawful custody.

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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