Second Marriage in Ontario: Leaving $1.3M to a New Spouse Without Disinheriting Adult Children From a First Marriage in 2026

The Scenario: $1.3M Blended Estate With Competing Claims

Robert Patel is 62, remarried for 7 years to Diana (his second wife, age 58). He has two adult children — Priya (34) and Amir (31) — from his first marriage, which ended in divorce in 2014. Robert's estate:

Robert wants Diana to live comfortably if he dies first. He also wants Priya and Amir to inherit the bulk of his wealth eventually. The problem: Ontario law makes this deceptively difficult without proper structuring.

The Threat: Ontario's Family Law Act Election

Under section 6 of Ontario's Family Law Act (FLA), when a married person dies, the surviving spouse has the right to elect for an equalization of net family property instead of taking what the will provides. This election must be made within 6 months of death (extendable by court order).

Here is how the equalization calculation works for Robert and Diana:

Note: The matrimonial home receives special treatment under the FLA. Unlike other assets, its value at the date of marriage is not deducted when calculating net family property. If Robert owned the home before the second marriage and it is now worth $850,000, the full $850,000 is included in his net family property for equalization purposes — not just the growth during the marriage. This dramatically increases the equalization payment.

The RRSP Problem: Beneficiary Designations Override the Will

Robert's $280,000 RRSP currently names Diana as beneficiary. This creates two issues:

• The RRSP bypasses the estate entirely. Even if Robert's will says “divide my estate equally among my children,” Diana receives the $280,000 RRSP directly — it never enters the estate for the executor to distribute.
• If Robert changes the beneficiary to his children, the entire $280,000 is included as income on his terminal tax return. At the highest Ontario marginal rate (53.53%), the tax is approximately $150,000 — leaving only $130,000 for the children after the estate pays the tax bill.

The tax cost of naming children directly as RRSP beneficiaries in a second marriage is brutal. For a deeper look at how RRSP taxation works at death, see our spousal RRSP inheritance strategies guide. The planning solution — a testamentary spousal trust as RRSP beneficiary — solves both problems simultaneously.

Structure 1: The Testamentary Spousal Trust

A testamentary spousal trust is created in Robert's will and funded at death. The trust holds assets for Diana's benefit during her lifetime, then distributes the remaining capital to Priya and Amir after Diana dies.

How it works for the $1.3M estate

During Diana's lifetime, the trust pays her all investment income (dividends, interest, RRIF minimum withdrawals). The trustees can also distribute capital for her maintenance and support if needed. Diana lives comfortably. But she cannot redirect the capital to her own family, a new partner, or anyone else.

When Diana dies, the trust winds up and distributes the remaining capital to Priya and Amir. At that point, any deferred capital gains and RRIF balances are taxed on the trust's final return — but the children inherit the after-tax balance.

Structure 2: The Marriage Contract (Domestic Contract)

The spousal trust protects assets after death. The marriage contract protects against the FLA election at death. Without a marriage contract, Diana can elect for equalization and potentially claim $165,000 or more — in addition to whatever the spousal trust provides.

What the marriage contract must contain

• Waiver of equalization on death: Diana agrees to accept the provisions of Robert's will (including the spousal trust) instead of electing for equalization under section 6 of the FLA
• Full financial disclosure: Both parties attach sworn financial statements showing all assets, liabilities, and income — without this, the contract is vulnerable to being set aside
• Independent legal advice: Each party signs a certificate confirming they received independent legal advice (ILA) from their own lawyer — this is not legally required but is practically essential for enforceability
• Consideration for Diana: The contract should specify what Diana receives in exchange for waiving equalization — typically the spousal trust provisions, life insurance, or a specific bequest — so a court does not find the contract unconscionable

Structure 3: Severing Joint Tenancy on the Matrimonial Home

Robert's home is held in joint tenancy with Diana. This means on Robert's death, Diana automatically becomes sole owner by right of survivorship — the home never enters the estate, is not governed by the will, and cannot be directed to the spousal trust or the children.

For Robert's plan to work, he should consider severing the joint tenancy and converting ownership to tenancy in common. This changes the outcome:

Severing joint tenancy is a unilateral act in Ontario — Robert can do it without Diana's consent by registering a notice on title. However, this introduces a significant complication: Robert's 50% interest now passes through the estate and is subject to Ontario's estate administration tax (probate fees) of 1.5% on values over $50,000 — approximately $6,000 on a $425,000 interest. For a detailed comparison of how probate fees work across provinces, see our Ontario vs. Nova Scotia probate fee comparison.

Why Mutual Wills Are Not the Answer

Many couples in second marriages sign “mutual wills” — mirror-image wills where both spouses agree not to change the will after the first death. The theory: after Robert dies, Diana cannot revoke the will and redirect everything to her own family.

In practice, the mutual wills doctrine has serious weaknesses in Ontario:

• Spending down is not prevented: Diana can spend the inherited assets during her lifetime. The mutual wills doctrine only prevents her from changing her will — not from depleting the estate through living expenses, gifts, or poor investments
• Enforcement requires litigation after two deaths: The children cannot enforce the mutual will agreement until Diana dies. By then, the assets may be gone — and enforcement requires expensive trust litigation
• Evidentiary problems: Courts require clear proof of a binding agreement not to revoke — not just two similar wills drafted at the same time. If the agreement is not explicitly documented, courts may refuse to enforce it
• No asset protection: Unlike a spousal trust where a trustee controls the capital, mutual wills give the surviving spouse outright ownership with no restrictions on spending

Estate lawyers in Ontario overwhelmingly recommend the spousal trust over mutual wills for blended families. The trust provides structural protection through a trustee with fiduciary duties — not just a promise that can be spent around.

The Complete Plan: All Three Structures Working Together

For Robert's $1.3M estate, the optimal plan combines all three structures:

The outcome after all three structures

Diana's total position: she lives in the family home for life, receives $20,000+ per year in trust income, and owns the $50,000 TFSA outright. She is financially secure.

Priya and Amir's position: they eventually inherit Robert's 50% of the home ($425,000), the remaining RRIF balance, and the non-registered investment capital — potentially $600,000 to $800,000 depending on how long Diana lives and what the trustee distributes for her maintenance.

The Conversation No One Wants to Have

The hardest part of blended-family estate planning is not the legal structures — it is the conversation. Robert must ask Diana to sign a marriage contract that limits her rights. Diana must agree that Robert's children will eventually inherit assets she might otherwise receive outright. Both must hire independent lawyers and exchange financial statements.

This conversation is easier when framed correctly: the marriage contract does not leave Diana with nothing — it guarantees her specific, generous provisions (lifetime home, lifetime income, TFSA outright) while ensuring Robert's children are not disinherited. Without the contract, the fallback position (FLA election, contested will litigation) is worse for everyone — including Diana, who may spend years in litigation with step-children.

For families navigating the emotional complexity of blended-family financial planning, professional guidance makes the difference between a plan that holds and one that collapses into litigation. See our remarriage financial planning checklist for the complete preparation steps, or book a consultation to model these structures with your actual numbers.

Tax Implications: What the CRA Takes at Each Stage

The combined plan produces the following tax profile:

The spousal trust plan saves approximately $154,000 in immediate tax at Robert's death. The tax is not eliminated — it is deferred until Diana dies or the trust disposes of the assets — but deferral over 20+ years at lower marginal rates produces real savings of $50,000 to $80,000 in present-value terms. For more on how Ontario capital gains interact with estate planning, see our joint tenancy and capital gains guide.

When to Put This Plan in Place

The optimal time to implement blended-family estate planning is:

• Before the second marriage: A marriage contract signed before marriage (a “prenup”) is easier to enforce than one signed after — courts are less likely to find duress or undue influence
• If already married: A postnuptial marriage contract is still enforceable in Ontario provided both parties have ILA and full disclosure — but do not delay further
• At minimum, before any health decline: If Robert develops a serious illness, Diana's leverage increases and her incentive to sign a contract decreases — the window for planning closes when capacity or willingness evaporates

The total implementation cost of $8,000 to $15,000 protects $1.3M in assets and prevents litigation that routinely costs $50,000 to $200,000. Every year of delay is a year in which Robert's estate plan has a $165,000+ hole that Ontario law will exploit on his death.