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Adoption and Inheritance in Ontario: Do Children Lose Intestacy Rights After Adoption?

March 25, 2026

By Pere Eze, PAE Legal

When a parent dies without a will, questions often arise about who is entitled to inherit - especially where a child is later placed for adoption or formally adopted.

 

Under Ontario law, the answer turns on timing and a key legal concept: whether the child’s interest in the estate has already vested indefeasibly.

 

This article explains how adoption affects a child’s inheritance rights where a parent dies intestate before the adoption process is completed.

Intestacy and the Definition of “Child” in Ontario

In Ontario, intestate succession is governed by the Succession Law Reform Act (“SLRA”).

Section 1(1) of the SLRA defines a “child” broadly to include a child conceived before but born alive after the parent’s death and a child conceived and born alive after the parent’s death (subject to statutory requirements in section 1.1(1) of the SLRA).

 

While the SLRA defines a "child" to include natural children, adopted children also inherit under Ontario law. A combined reading of section 217 (4) of the Child, Youth and Family Services Act (CYFSA), sections 2(1)(a), 4(2)(b), (3) & (4) of the Children's Law Reform Act (CLRA), and section 1(1) of the SLRA indicates that adopted children are entitled to the inheritance of their deceased adoptive parent’s estate who died testate or intestate. This was the position of the court in Ksianzyna Estate v. Pasutszok 2008 CanLII 59321 (ON SC), where it was held that “Under Ontario law, a person is the child of his or her natural or adopting parents: Children’s Law Reform Act, R.S.O. 1990, c. C.12, s. 1(1) and (2).”

 

The decision in Ksianzyna Estate was reinforced in the case of Estate of Sydney Monteith v. Monteith et al., 2023 ONSC 7246, where the court held that a foster child who enjoyed a special relationship with the deceased does not qualify as the deceased’s child under the law in the absence of a formal adoption order and is not entitled to inheritance under intestacy.

 

In Ontario, where a person dies intestate and is survived by a child, whether biological or adopted, that child is entitled to share in the estate. Importantly, this entitlement is determined at the time of death, not at a later stage in the administration of the estate. Section 46 of the SLRA.

What Happens When a Child Is Placed for Adoption?

 

Placing a child for adoption does not, in itself, affect the child’s legal status.

 

Until an adoption order is made, the child remains the child of his or her legal parent prior to the adoption order and is entitled to inherit from that parent’s estate in intestacy before an order of adoption. Section 217(2) of the CYFSA.

Effect of a Finalized Adoption Order

An adoption order has significant legal consequences. Under the CYFSA:

  • The adopted child becomes the legal child of the adoptive parent(s) on the day of the adoption order; and

  • The legal relationship between the child and former parents is severed, except in step-parent adoptions.

 

Do Adoption Orders Affect Inheritance Rights?

 

Section 217(5) of the CYFSA provides that an adoption order does not affect:

“any interest in property or right of the adopted child that has indefeasibly vested before the date of the making of the adoption order.”

 

A child’s interest in property or right (“inheritance right(s)” or “right”) is deemed to be indefeasibly vested if the right is legally recognized and cannot be defeated, divested, or lost by a future event, even if possession is delayed.

 

This means that if a child’s inheritance rights have already vested indefeasibly before the adoption order is made, those rights are preserved.

When Do Inheritance Rights Vest?

In the context of intestacy, a child’s beneficial interest in an estate generally arises at the date of the parent’s death, and in most cases, will ordinarily vest at that time.

For the purpose of 217(5) of the CYFSA, a child’s inheritance right will indefeasibly vest on the date of the parent’s death in the absence of contingencies or statutory divesting mechanisms, such as section 9(1) of the Estate Administration Act.

The characterization of an interest as “indefeasibly vested” is ultimately context-specific and cannot be exhaustively discussed in this article.

Key Takeaways

  • A child’s entitlement on intestacy is determined at the date of the parent’s death.

  • Placement for adoption does not affect inheritance rights.

  • An adoption order does not impact a child’s proprietary interest or other beneficiary rights that have indefeasibly vested before the adoption order was made.

  • A finalized adoption generally severs the legal relationship between a child and the parent before the adoption order. This affects the child’s right to inherit from such a deceased parent who died intestate if rights did not vest indefeasibly before the adoption order.

 

Final Thoughts

 

The interaction between adoption law and estate law can be complex, but the governing principle in intestacy is clear: rights that have already vested indefeasibly cannot be taken away by a later adoption order.

 

This article is for general information only and does not constitute legal advice. Each situation may turn on specific facts and applicable law, particularly the timing of death, placement, vesting and adoption. Consult a qualified lawyer for context-specific guidance.

Contact PAE Legal for tailored advice concerning your process.

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