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Blended Family Trusts in Ontario: Protecting Your Children's Inheritance

Learn how a trust can support a new spouse while protecting your first family's inheritance in Ontario, including tax rules and trustee duties.

Wills & Estates5 min readTSLBy the Treadstone Law Team · OntarioUpdated November 1, 2026
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Key takeaways
  • A spousal trust can rollover tax on property passing at death only if the spouse or partner is entitled to all the trust income for life and no one else can use income or capital during that time.
  • Joint assets and named-beneficiary assets pass outside the estate, so they can send money to a new spouse regardless of a trust.
  • The trustee's investment duties, accounting duties and removal rules are what hold a trustee to account for the first family's children.

If you have remarried and have children from an earlier relationship, you probably want to look after your new spouse and also make sure your children still receive something. Without a plan, one goal can easily swallow the other. A trust is one tool people use to balance them.

This article explains how a trust of this kind generally works in Ontario after a death: what the tax rules say, what a trustee must do, and what can go wrong. It is general information, and the right structure depends on your family, your assets and your tax position.

Why blended families use trusts

The usual worry is simple. If everything goes directly to your spouse, your spouse decides who inherits next, and your children may receive nothing. A trust lets one person enjoy the property for a time while the people who receive it afterwards are already set.

Before relying on a trust, look at how your assets are actually held. Assets with a named beneficiary, such as RRSPs, RRIFs and TFSAs, and jointly owned assets that automatically go to the surviving owner, pass outside the estate. A trust in your estate plan will not control them unless they are arranged to fit with it.

How a spousal trust works

In a typical blended family plan, property is left by will to a trust for your spouse or common-law partner, with your children named to receive what remains later. For tax purposes, a trust created on and because of a person's death is a testamentary trust.

There is a tax-deferred rollover available for this arrangement. Property left by will to a spouse or common-law partner trust can pass at cost, but only if the survivor is entitled to all of the trust's income for life and no one else may receive or use the trust's income or capital during their lifetime. That condition matters for your children: under a rollover trust, they generally cannot receive capital while your spouse is alive.

The property must also vest indefeasibly in the spouse or the trust within 36 months after the death, although the Minister may allow a longer period if a written application is made within that time.

When your spouse dies, the trust is generally deemed to dispose of its property then, not on the usual 21-year date. A tax bill may arise at that point, so the trust should be planned with that in mind.

Tax points that affect what your children receive

Type of trust or estateKey tax feature
Trust in generalTaxed at the top personal rate on its taxable income
Graduated rate estateNot taxed at the flat top rate; can only be a GRE for up to 36 months after the death
Qualified disability trustCan be taxed at graduated rates if it jointly elects with a beneficiary on Form T3QDT and meets other conditions
Trust held longer termGenerally deemed to dispose of capital property every 21 years

A graduated rate estate must designate itself as one on its first T3 return, and there can be only one for a deceased person. It has a deemed year-end on the day it stops being a GRE.

Some people use a trust during their lifetime instead. An alter ego trust is a living trust created after 1999 by a settlor aged 65 or older, who must be entitled to all the trust's income during their lifetime. A joint spousal or common-law partner trust works similarly, with the settlor and their partner entitled to all income until the later of their deaths. Whether either fits your situation is a question for a lawyer and an accountant.

Who keeps the trust honest

Your children are only protected if the trustee does the job properly. In Ontario, a trustee investing trust property must use the care, skill, diligence and judgment of a prudent investor. A trustee is not liable for an investment loss if the conduct followed a plan or strategy a prudent investor could adopt.

In a blended family, trustee choice is delicate, because a surviving spouse and the children may want different things. The usual tools if things go wrong are:

The general limitation period in Ontario is two years from when a claim was discovered, or should reasonably have been discovered. If you think something is wrong, do not wait.

What to do next

Frequently asked questions

Can my children inherit while my spouse is still alive?

Not if you use the spousal rollover. To qualify, no one other than your spouse may receive or use the trust's income or capital during your spouse's lifetime. A different structure may allow earlier gifts, but with different tax results, so get advice.

Does a trust avoid Estate Administration Tax?

Not automatically. Ontario includes in the estate value any property the deceased owned that was held in another person's name, and putting legal title in another name does not by itself remove it. Assets with a named beneficiary or that pass to a surviving joint owner are excluded.

What if the trustee is not acting fairly?

A beneficiary can ask the court to require accounts to be passed. The Superior Court of Justice can also remove an estate trustee and appoint a replacement.

Can a new trustee be appointed if the first one dies?

Generally yes. A new trustee may be appointed in writing where a trustee dies, refuses or is unfit or incapable of acting, and the trust instrument's nominee usually appoints. The court can also appoint one.

Sources

Links go to official government, court and regulator pages. The law changes — confirm you are reading the current version.

This article is general information, not legal advice. Reading it does not create a lawyer-client relationship. Ontario laws, tax rates, and government programs change, and how the law applies depends on your specific facts. For advice about your situation, speak with a licensed Ontario lawyer. Treadstone Law is licensed by the Law Society of Ontario — reach us at 1-844-900-1070 or start a file online.

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