You have built something over a lifetime. You have a spouse you love and want to provide for, and you have children — perhaps from a first marriage — whose inheritance you also want to protect. On paper these two goals look compatible. In practice they compete, and the standard estate documents most people sign do not resolve the tension. They pick a winner, usually by accident.
This is the defining problem of estate planning for blended families. It is not a legal footnote. It is the whole game.
Why "everything to my spouse" can disinherit your children
The most common will in Canada leaves everything to the surviving spouse, then to the children after the second death. In a first marriage where both parents share the same children, that ordering is usually harmless. In a blended family it can be quietly catastrophic.
Once your assets pass outright to your spouse, they are your spouse's assets. Your spouse can write a new will. Your spouse can remarry. Your spouse's own children — not yours — can become the ultimate beneficiaries. Nothing legally binds a surviving spouse to honour the informal understanding you had while you were alive. Your children may receive nothing, and they may learn this only after both of you are gone, when it is far too late to fix.
The uncomfortable truth: an outright gift to a spouse and a promise to "take care of the kids" are not the same instrument. One is enforceable. The other is a hope.
Spousal trusts and testamentary trusts
The tool that resolves the tension is the trust. Instead of leaving assets to your spouse outright, you leave them to a trust.
A spousal trust can give your surviving spouse the income (and, if you choose, access to capital) for the rest of their life, while guaranteeing that whatever remains passes to your children on your spouse's death. Your spouse is provided for. Your children's remainder is protected and cannot be redirected. A properly structured spousal trust also defers the tax bill at death by rolling assets over at cost rather than triggering it immediately — more on that below.
A testamentary trust — any trust created by your will — can hold a child's share until they reach an age you consider sensible, protect an inheritance from a child's own divorce or creditors, or provide for a child with a disability without jeopardizing provincial benefits.
Trusts are not exotic. They are the ordinary machinery of doing this properly, and in a blended family they are close to essential.
Beneficiary designations override your will
Here is a detail that undoes more blended-family plans than any other: the beneficiary designation on your RRSP, RRIF, and TFSA is not governed by your will. It passes directly to the named person, outside the estate, no matter what your will says.
If you updated your will to build careful trusts for your children but left an ex-spouse or only your current spouse named on a RRIF from years ago, that account pays out exactly as the old form directs. The will never touches it.
- Review every beneficiary designation — RRSP, RRIF, TFSA, pensions, and life insurance — every time your family situation changes.
- Confirm the named beneficiary is consistent with the intention in your will, not in conflict with it.
- Remember that a registered account left to a non-spouse is generally fully taxable to your estate, while the account itself passes to the named beneficiary — a mismatch that can leave the wrong person paying the tax.
Life insurance to equalize the estate
Blended families often hold one large, indivisible asset — a home, a cottage, or a business — that cannot easily be split between a surviving spouse and children from a prior marriage. Life insurance is the classic solution.
You leave the illiquid asset to one side of the family and use a life insurance policy to deliver an equivalent, tax-free lump sum to the other. The estate is equalized without forcing a sale. Insurance is also the cleanest way to fund the tax bill that death itself creates.
A hypothetical illustration. Consider a hypothetical couple, R and M, both in their early sixties and in a second marriage. R has two adult children from a first marriage. R owns a cottage worth roughly $1.2 million and an investment portfolio of about $1.5 million. R wants M to keep the family home and remain comfortable, but wants the cottage and its value to reach R's own children. A spousal trust holds the portfolio to support M for life, with the remainder passing to R's children. The cottage is left directly to the children, and a life insurance policy provides M with a tax-free amount to offset it. Each side is provided for; nothing has to be sold in a hurry; and the plan does not depend on anyone's goodwill after R is gone. These figures are illustrative only.
Probate, deemed disposition, and keeping assets in the family
Two tax realities shape every Ontario plan.
Estate administration tax (probate). Ontario charges roughly 1.5% on the value of assets passing through the estate above $50,000 — about $15,000 per $1 million. Assets that pass outside the estate (registered accounts with named beneficiaries, jointly held property, insurance) generally avoid it. For business owners, multiple wills are a well-established Ontario strategy: a primary will for assets that require probate and a secondary will for private-company shares and certain personal property that do not, keeping the value of the business out of the probate calculation entirely.
Deemed disposition at death. For tax purposes you are treated as having sold everything you own the moment before you die. Non-registered capital gains are realized, and a RRSP or RRIF is fully added to income unless it rolls to a spouse or a qualifying spousal trust. A large portfolio or a long-held cottage can generate a substantial final tax bill in a single year — which is precisely why the spousal-trust rollover and insurance funding matter, and why the family business or cottage needs its own plan to stay in the family rather than being sold to pay the taxman.
What this means for you
A blended-family estate has three moving parts that must be built together: the portfolio (what you own and how it is titled), the plan (wills, trusts, and beneficiary designations), and the lawyer who drafts the documents. When these are handled in isolation — a will written without reference to the RRIF beneficiary, a portfolio managed without reference to the deemed disposition — the plan fails at the seams.
- Have you looked at your will and every beneficiary designation together, as one system?
- Is any large asset left outright to a spouse when a spousal trust would protect your children's remainder?
- Do you know the approximate tax bill your estate would face today, and how it would be funded?
We work alongside your estate lawyer and accountant, not in place of them. Our role is to make sure the portfolio is structured, titled, and tax-aware so that the plan your lawyer drafts actually works when it is called upon — and so no piece quietly overrides another.
If your family is blended and you are not certain all three parts are pulling in the same direction, start with a Second-Opinion Portfolio Review. We will look at how your assets are held and coordinated with your estate plan, and flag where a beneficiary designation or an outright gift may be working against your intentions. Call us at (416) 930-5550.
This article is general information, not individual legal, tax, or investment advice. BlueSky Investment Counsel Inc. is a registered portfolio manager; please consult your estate lawyer and accountant on your specific situation.