Adult Child Inherits $1M Ontario Estate: Capital Gains, Probate Fees and the 6-Month CRA Deadline

No Spouse Means No Rollover: The Starting Point

Most Canadian estate planning content focuses on the spousal rollover — the automatic tax deferral that applies when assets pass to a surviving spouse under ITA s.70(6). But what happens when the beneficiary is an adult child? The answer is straightforward and expensive: every capital asset in the estate is deemed sold at fair market value on the date of death, and the resulting capital gains are taxed on the deceased's final T1 return. There is no deferral. There is no rollover. The estate pays before the child receives anything.

This article walks through the full tax exposure on a $1,000,000 Ontario estate where the sole beneficiary is a non-spouse adult child. We will cover the deemed disposition, Ontario probate fees, the 2026 capital gains inclusion rate, the executor's personal liability risk, and whether joint tenancy actually helps. For a comparison with how the same estate would be treated if a spouse were the beneficiary, see our spousal rollover walkthrough.

Step 1: Deemed Disposition at Death — Who Pays and How Much

Under ITA s.70(5), the deceased is treated as having sold all capital property at fair market value immediately before death. This is not optional. It applies to stocks, rental properties, investment accounts, cottages, and any other capital property (the principal residence is exempt if properly designated). The capital gains generated on this deemed "sale" are reported on the deceased's final T1 return — not the beneficiary's return.

Let us assume the following estate composition:

Wait — the estate is worth $1.5 million in assets but we said $1 million. That is because the estate also carries a $500,000 mortgage on the principal residence. The net estate value is approximately $1,000,000. Probate is assessed on gross value of assets passing through the will (more on that below), but capital gains tax is calculated on the gains regardless of debts.

Step 2: Capital Gains Calculation Under the 2026 Inclusion Rate

The 2026 capital gains inclusion rate for individuals is 50% on the first $250,000 of capital gains and two-thirds (66.67%) on gains above $250,000. This tiered structure matters significantly on a $410,000 gain:

This $231,672 in taxable income is added to any other income the deceased earned in their final year (employment income, pension income, CPP, OAS). Assuming the deceased had $40,000 in other income before death, the total income on the final T1 return is approximately $271,672. At combined Ontario federal-provincial marginal rates, the capital gains portion alone generates roughly $85,000 to $105,000 in tax. For a deeper explanation of how capital gains apply to inherited property specifically, see our capital gains on inherited property guide.

What If There Is an RRSP or RRIF With No Spousal Beneficiary?

If the deceased also held a $200,000 RRSP with the adult child named as beneficiary (not a spouse or dependent), the entire $200,000 is included as income on the final T1 return — not as a capital gain, but as ordinary income taxed at the deceased's full marginal rate. Combined with the capital gains, the final return could show total income exceeding $470,000, pushing most of the income into Ontario's highest marginal bracket (53.53% on income above $220,000). For the full walkthrough on RRSP taxation at death, see our RRSP deemed disposition guide.

Step 3: Ontario Probate Fees — The Exact Calculation on $1M

Ontario's Estate Administration Tax (commonly called probate fees) is calculated on the total value of assets that pass through the will. The rate structure is:

• $5 per $1,000 on the first $50,000 of estate value
• $15 per $1,000 on estate value above $50,000

For our $1,000,000 estate (assuming all assets pass through the will):

Step 4: The Executor's Personal Liability — CRA Clearance Certificates

Here is where estate administration becomes personally dangerous for the executor. Under ITA s.159(2), an executor who distributes estate property to beneficiaries without first obtaining a clearance certificate from CRA is personally liable for any unpaid taxes — up to the value of the property distributed.

The clearance certificate (requested via form TX19) is CRA's confirmation that all income tax, GST/HST, payroll deductions, and other amounts owing by the deceased and the estate have been paid or secured. CRA will not issue the certificate until:

• The deceased's final T1 return has been filed and assessed
• Any T3 trust return for the estate has been filed and assessed
• All prior-year returns are filed and up to date
• All taxes owing have been paid in full

CRA processing time for clearance certificates is typically 3 to 6 months after the request is submitted. The entire process — from death to clearance certificate — can easily take 12 to 18 months.

Step 5: The CRA Filing Timeline for Executors

The filing deadline for the deceased's final T1 return is the later of: six months after the date of death, or April 30 of the year following the year of death. Here is how that plays out for different death dates in 2026:

Missing the deadline triggers a late-filing penalty of 5% of the balance owing plus 1% per additional month (up to 12 months). On a $90,000 tax bill, that is $4,500 on day one plus $900 per month — penalties that come directly out of the estate and reduce the child's inheritance further.

Will vs. Joint Tenancy: Which Reduces the Total Cost?

Many parents add an adult child as a joint tenant on property or bank accounts specifically to avoid probate. Here is a side-by-side comparison of the two approaches on a $500,000 non-registered investment account:

Putting It All Together: Total Cost on a $1M Ontario Estate

Here is the full picture for our $1,000,000 Ontario estate passing to an adult child, assuming all assets pass through the will:

On a $1,000,000 net estate, the adult child receives roughly 86 to 89 cents on the dollar after all taxes, fees, and professional costs. The single largest deduction is capital gains tax — not probate. Families who focus exclusively on probate avoidance while ignoring capital gains planning are optimizing for the wrong cost. For a detailed look at how blended families navigate these same challenges with additional complexity, see our blended family estate planning guide.

What the Adult Child Should Do After Inheriting

The adult child who inherits a $1M estate has several immediate priorities:

1. Understand the cost base: The child inherits assets at their fair market value on the date of the parent's death — not the parent's original cost base. Unlike the spousal rollover, there is a cost base "step-up" because the deemed disposition already occurred and the tax was already paid by the estate.
2. Do not rush the executor: Pressuring the executor to distribute before the clearance certificate creates personal liability risk for the executor and potential clawback risk if CRA reassesses.
3. Review the inherited portfolio: The child now owns assets that may not align with their risk tolerance, time horizon, or tax situation. Selling and reinvesting is not a taxable event relative to the inherited cost base (which is the fair market value at death) — capital gains only accrue on appreciation after the date of death.
4. Consider RRSP contribution room: A large cash inheritance can be sheltered in registered accounts if the child has available RRSP or TFSA contribution room.