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Find a Lawyer » Canada Legal Guides » Ontario Legal Guides » Wills & Estate Planning Ontario » Making a Will & Power of Attorney Ontario » Drafting an Ontario Will That Accounts for Future Unborn Grandchildren

Drafting an Ontario Will That Accounts for Future Unborn Grandchildren

29 Jun 2026 5 min read No comments Making a Will & Power of Attorney Ontario
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In Ontario, you can draft your Will using “class gift” terminology (e.g., “to my grandchildren”) to automatically include future, unborn descendants. This prevents the need to constantly update your Will every time a new grandchild is born, ensuring no one is accidentally disinherited.

Welcoming a new grandchild into the family is a joyous occasion. 👶 For many grandparents in Ontario, leaving a legacy to the next generation is a primary goal of estate planning. However, families grow and change rapidly. If you live in Markham, Kitchener, or Windsor, and you specifically list your three current grandchildren by name in your Will, what happens if a fourth grandchild is born next year?

If you fail to update your documents, that fourth child could be completely legally disinherited. To solve this problem, Ontario estate law allows the use of “class gifts.” Instead of naming individuals, you define a group-such as “all my grandchildren alive at my death.” This dynamic drafting creates a flexible Will that automatically expands to include any unborn grandchildren who arrive after the document is signed.

Drafting a class gift requires precise legal language to avoid catastrophic confusion. 📋 Below is a detailed, step-by-step guide explaining how to draft an Ontario Will that accounts for future unborn grandchildren. Most testators in this province choose to hire an estate planning lawyer to ensure these trust structures are legally airtight.

Step-by-Step Process in Ontario

Protecting unborn generations requires forward-thinking legal strategies. The exact wording of your Will determines who gets a cheque and who is left out.

Step 1: Define the “Class” Clearly

The fundamental step is abandoning specific names for the group designation. Your lawyer will draft a clause leaving a portion of your estate to a class, such as “my children’s children.” You must also define the closing date of the class. Usually, this is “those living at the date of my death.” Any grandchild born before you die is included; any conceived after you die is generally excluded, preventing the estate from being held up indefinitely.

Step 2: Establish the Division Method

You must instruct the executor on how to divide the money if one of your own children passes away before you. 📝 In Ontario, most lawyers use the term Per Stirpes (by the roots). This means if your son passes away, his share flows equally down to his children (your grandchildren). Alternatively, Per Capita means the money is divided equally among all surviving heads, regardless of which family branch they belong to.

Step 3: Set an Age of Majority Trust

In Ontario, a minor child (under 18) cannot legally inherit a large sum of cash directly. Your Will must establish a trust for these minor grandchildren. You will appoint a Trustee (often your executor) to hold the funds. You can dictate that the grandchild receives the money when they turn 21 or 25, while allowing the Trustee to dip into the funds early for the child’s education or healthcare in cities like Toronto or London.

Step 4: Include Adopted and Assisted Reproduction Children

The definition of a “child” has evolved. 👪 Under the modern Ontario Children’s Law Reform Act, legally adopted children are automatically treated exactly the same as biological children. However, to be absolutely safe, your Will should contain an interpretation clause explicitly stating that “grandchildren” includes any legally adopted children, as well as those conceived through assisted reproduction, ensuring zero discrimination.

Step 5: Planning for the Worst-Case Scenario (Gift-Over Clauses)

What happens if an entire branch of the family tragically passes away in a common accident? A robust Will always includes a “gift-over” or ultimate disaster clause. This dictates where the money should go if none of the intended class (children or grandchildren) survive you. Often, testators in Ontario designate a registered charity or remote relatives to receive the funds in this incredibly rare scenario.

How Much Does it Cost in Ontario?

Drafting a flexible Will now saves your estate from massive legal fees and family fractures later. 💵

  • Drafting a Trust Will: A comprehensive Will featuring class gifts and minor trusts typically costs between $800 CAD and $2,000 CAD at an Ontario law firm.
  • Trust Administration Fees: When the time comes, the Trustee managing the grandchild’s money is legally entitled to compensation, generally up to 5% of the trust’s value, though family members often waive this fee.
  • The Office of the Children’s Lawyer: If a minor grandchild inherits without a proper trust in place, the government’s Office of the Children’s Lawyer (OCL) may step in, which complicates the process and restricts access to the funds.

How Long Does the Process Take?

Managing an estate with minor beneficiaries is a long-term commitment. ⏱️

Stage of Estate PlanEstimated Timeline in Ontario
Drafting the Class Gift Will2 to 4 weeks
Probate Process (Post-Death)4 to 8 months to secure the Certificate
Trust Management for MinorsCan last 10 to 20+ years (until age 25)

Frequently Asked Questions (FAQ)

What happens if a grandchild is in the womb when I die?

Under Ontario law, a child conceived before your death and born alive afterward (en ventre sa mere) is legally treated as if they were alive at the time of your death. They will be included in the class gift.

What happens if I use a DIY Will kit for a class gift?

Do-it-yourself Will kits are notoriously rigid and often fail to provide the nuanced language required to establish proper minor trusts or per stirpes distributions. Using a cheap template for a growing family frequently results in vague wording, forcing the estate to spend tens of thousands of dollars on a court application for a judge to interpret your true intentions.

Can I exclude a specific grandchild from the class?

Yes. You can draft a class gift that says, “to all my grandchildren, with the strict exception of John Doe.” However, intentionally disinheriting a grandchild should be accompanied by a private Memorandum of Wishes to explain your reasoning and prevent litigation.

Do step-grandchildren automatically inherit under a class gift?

No. In Ontario, the legal term “grandchildren” generally only refers to biological or legally adopted descendants. If you want step-grandchildren to inherit, you must explicitly name them or specifically expand the definition of the class in your Will.

Who manages the money if the grandchild is only 2 years old?

The Trustee named in your Will manages the funds. The money is invested, and the Trustee files annual tax returns for the trust until the grandchild reaches the age specified in the Will (e.g., 21 or 25).

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