Canada Estate Planning Worked Example: Ontario Blended Family With $2.1M — Two Adult Children, One Minor Stepchild, and the Spousal Trust That Creates a $310,000 Contingent Tax Liability in 2026

The Setup: Meet the Karim-Henderson Estate

A Mississauga man dies at age 62. Second marriage, 7 years. His estate totals $2.1M:

The family: a surviving second spouse (age 54, with her own $420,000 RRSP from a prior career), two adult biological children (ages 28 and 31, both financially independent), and one 9-year-old stepchild from the current marriage. The will creates a spousal trust for the principal residence and non-registered portfolio, names the surviving spouse as RRSP beneficiary and TFSA successor holder, and directs cash equally to all three children. The surviving spouse is named sole executor.

This is the exact configuration that produces the most estate litigation in Ontario. Every structural decision in this will contains a hidden cost or conflict. Let's walk through each one with the actual tax math.

Step 1: What Happens on Day One — The First Death

Principal Residence: The PRE Eliminates the Gain

The $950,000 Mississauga home has a $470,000 accrued gain ($950,000 FMV minus $480,000 ACB). Under section 40(2)(b) of the Income Tax Act, the principal residence exemption (PRE) eliminates this gain entirely — one property per family unit per year. No capital gains tax. The home transfers into the spousal trust at the deceased's ACB of $480,000.

Watch this number: $480,000. That's the ACB the trust inherits. If the home appreciates to $1.1M by the time the surviving spouse dies, the trust faces a $620,000 deemed gain on the second death. The PRE used on the first death does not carry forward.

RRSP: The Spousal Rollover Defers $225,000 of Tax

The $420,000 RRSP has the surviving spouse named as beneficiary. Under section 60(l) of the Income Tax Act, the full amount rolls into the spouse's own RRSP or RRIF with no immediate tax. The CRA treats it as if the spouse always held it. Combined with her existing $420,000 RRSP, the surviving spouse now has $840,000 in registered savings.

Non-Registered Portfolio: Spousal Trust Deferral

The $380,000 non-registered portfolio (ACB $250,000, accrued gain $130,000) transfers into the spousal trust under section 73(1) at the deceased's ACB. No deemed disposition on the first death. The $130,000 of accrued gain rolls into the trust, waiting for the second death or trust wind-up.

TFSA: Clean Transfer to Successor Holder

The $85,000 TFSA has the surviving spouse designated as successor holder (not just beneficiary — this distinction matters). The TFSA transfers directly to the spouse, who becomes the new account holder. No tax. No impact on the spouse's own TFSA contribution room. No probate, because TFSAs with successor holders bypass the estate entirely.

If the 9-year-old stepchild had been named TFSA beneficiary instead, the TFSA would cease to be a TFSA on the date of death. Any investment growth between death and distribution would be taxable income in the estate. On $85,000 with even a few months of growth, that's a modest but entirely avoidable tax hit.

Cash: The Only Simple Part

$265,000 in cash splits equally among the three children: $88,333 each. No tax consequences — cash doesn't trigger capital gains. But this cash passes through the will, so it's subject to Ontario probate.

Step 2: Ontario Probate — What the Estate Administration Tax Actually Costs

Ontario charges $0 on the first $50,000 and $15 per $1,000 (1.5%) on everything above. The probate-eligible estate includes only assets that pass through the will:

Probate on $1,595,000: ($1,595,000 − $50,000) × $15 / $1,000 = $23,175. If the RRSP and TFSA had no named beneficiaries and flowed through the will instead, probate would jump to $30,750 — an extra $7,575 for failing to fill out two forms.

Step 3: The First-Death Tax Bill

Because the spousal trust and spousal rollover defer the major gains and RRSP inclusion, the tax bill on the terminal return for the first death is remarkably low:

$48,175 on a $2.1M estate looks efficient. It is — for now. The spousal trust and spousal rollover didn't eliminate the tax. They moved it to the second death, where it arrives with interest.

Step 4: The Second Death — Where the $310,000 Bill Materializes

The surviving spouse dies 15 years later at age 69. The spousal trust collapses. Here's what's on the table (assuming moderate growth and RRIF withdrawals):

The Capital Gains Math on the Second Death

The home in the spousal trust does not qualify for the PRE on the second death unless the surviving spouse designated it as her own principal residence for those years (and she didn't use the exemption on another property). Assuming she lived in the trust home and designated it as her PR, the PRE covers the gain. If she owned a different home as her primary residence, the trust home's $620,000 gain is fully taxable.

Worst case — no PRE on the trust home:

• Home gain: $620,000 — 50% inclusion on first $250,000 = $125,000 taxable; 66.67% on remaining $370,000 = $246,700 taxable. Total taxable capital gain from home: $371,700
• Non-registered portfolio gain: $270,000 — entire amount falls above the $250K threshold (combined with home gains). 66.67% inclusion = $180,000 taxable
• RRIF: $680,000 fully included as income

Best case — PRE covers the trust home:

• Home gain: $0 (PRE eliminates)
• Non-registered portfolio gain: $270,000 — 50% inclusion on first $250,000 = $125,000; 66.67% on remaining $20,000 = $13,334. Total taxable: $138,334
• RRIF: $680,000 fully included as income

Step 5: The RRSP Decision — Spousal Rollover vs Refund of Premiums to the Minor Stepchild

The will names the surviving spouse as RRSP beneficiary. That's the default recommendation for most couples. But there's a less obvious option: directing part or all of the RRSP as a refund of premiums to the 9-year-old stepchild under section 60(l).

Option A: Full Spousal Rollover ($420,000 → Spouse's RRSP)

• Immediate tax: $0
• Spouse's combined RRSP: $840,000
• Eventual tax on spouse's death (assuming $680,000 RRIF balance after withdrawals): ~$364,000 at 53.53%
• Net deferral benefit: significant, but the tax is the spouse's estate's problem

Option B: Refund of Premiums to Minor Stepchild ($420,000 → Annuity to Age 18)

• The stepchild must be financially dependent on the deceased at date of death — at age 9 and living in the household, this is likely provable
• The $420,000 is taxed in the child's hands, not the estate's. At a child's marginal rate (near 0% on the first ~$16K of income, then graduated), the tax is dramatically lower
• However: the CRA requires the refund of premiums be used to purchase a term annuity to age 18 — the child receives annual payments over 9 years, each taxed as income
• Annual annuity payment: ~$46,667/year for 9 years
• Tax on $46,667/year at graduated rates (child has no other income): approximately $6,700/year, or ~$60,300 total

In practice, most estate lawyers default to the spousal rollover because it's simpler and the spouse usually needs the capital. But in a blended family where the deceased wants to ensure the stepchild receives a substantial share, the refund of premiums is one of the most tax-efficient tools available — and almost nobody uses it.

Step 6: The TFSA Problem — No Rollover for the Stepchild

The TFSA successor holder designation goes to the surviving spouse — clean, no tax, no probate. But if the deceased had wanted the stepchild to receive the TFSA instead, there's no equivalent of the successor holder for a non-spouse.

A non-spouse TFSA beneficiary receives the fair market value at the date of death tax-free, but any growth between the date of death and the date of distribution is taxable income in the estate (or in the beneficiary's hands, depending on how the executor distributes). On an $85,000 TFSA earning 5% annually, a 6-month delay in distribution creates roughly $2,125 of taxable income that could have been avoided by distributing immediately.

The lesson: for the stepchild, speed matters. The executor should distribute TFSA proceeds to a non-spouse beneficiary as fast as the estate administration allows.

Step 7: The Dependant Support Claim — The Adult Children's Legal Lever

Ontario's Succession Law Reform Act, Part V, allows dependants of the deceased to apply to court for support from the estate if the will fails to make adequate provision for them. “Dependant” includes a spouse and children — including adult children who were receiving ongoing financial support from the deceased.

In this scenario, the adult children (ages 28 and 31) are financially independent. They're unlikely to have a successful dependant support claim. But the Act also creates standing for the surviving spouse and the minor stepchild to claim dependant support — and the will already provides generously for both.

The real risk is different: the adult children may not challenge the will under Part V, but they can demand a passing of accounts — a court-supervised review of every transaction the executor made. If the executor (their stepmother) made any discretionary decisions that favoured herself or her child over them, the court can surcharge her personally for the misallocated amounts. This is not a hypothetical. It is the most litigated scenario in Ontario estate law.

Step 8: The Executor Conflict — Why the Surviving Spouse Should Not Be Sole Executor

The will names the surviving spouse as sole executor. She is also the income beneficiary of the spousal trust, the RRSP beneficiary, and the TFSA successor holder. Every decision she makes as executor — how to invest the trust assets, when to sell the home, how to allocate estate expenses, how much to claim as executor compensation — directly affects her own economic interest.

Ontario's standard executor compensation is 2.5% each of capital receipts, capital disbursements, revenue receipts, revenue disbursements, and a care-and-management fee. On a $2.1M estate, this could reach $50,000–$100,000. The adult children can challenge this at the passing of accounts, arguing the executor over-compensated herself.

The fix is structural, not personal. Appoint an independent co-executor — either a trust company (fees typically 2–5% of estate value) or a neutral professional (lawyer, accountant). The co-executor provides arm's-length oversight on every discretionary decision, which makes a passing-of-accounts challenge much harder to win. The cost of a corporate co-executor ($40,000–$100,000) is less than the legal fees of a contested estate administration, which regularly exceed $150,000 in Ontario for estates of this size.

The Complete Picture: First Death vs Second Death Tax Summary

Combined lifetime estate cost: approximately $378,000 — roughly 18% of the original $2.1M estate. The spousal trust didn't reduce the total tax. It shifted the timing. Whether that shift was worth it depends on what the surviving spouse did with the deferred capital during those 15 years.

What Could Have Been Done Differently

Provincial Comparison: What If This Family Lived in Alberta or Quebec?

Province of residence at death is one of the largest single levers in estate tax outcome. On this $2.1M estate, the probate difference between Ontario and Alberta exceeds $22,000. But don't move provinces solely for probate savings — family location, healthcare, employment, and quality of life dominate the math on all but the largest estates.

The One Decision Lever That Mattered Most

In this entire $2.1M blended-family estate, the single decision with the largest dollar impact isn't the spousal trust. It isn't the probate strategy. It's the RRSP beneficiary designation. Naming the spouse saves $225,000 of immediate tax but creates a $360,000+ deferred bill. Naming the financially dependent stepchild as refund-of-premiums recipient triggers $60,000 of tax spread over 9 years. The difference is $300,000.

Most estate plans get this one wrong because they default to the standard spousal rollover without modelling the second-death outcome. In a blended family, the second death is where the real planning happens — and by then, the first will has already locked in the structure. Plan both deaths at the same time, or plan neither effectively.