Testamentary Trust vs. Living Trust: What's the Difference?

Trusts are among the most flexible tools in estate planning, but they come in two broad families that are easy to confuse. A testamentary trust is created by your will and only springs into existence when you die. A living trust, properly called an inter vivos trust, is created and funded while you are alive. That single difference, timing, cascades into differences in control, privacy, cost, probate and tax. Choosing between them, or deciding whether you need a trust at all, depends on what you are trying to achieve.

This guide is for anyone considering a trust as part of their estate plan and wanting to understand the distinction clearly. It is general information; trusts are technical and must be established with a lawyer and accountant, because the tax rules in particular are detailed and have changed in recent years.

What a trust is, briefly

Before comparing the two, it helps to recall what a trust actually is. A trust is a legal relationship in which one party, the trustee, holds and manages property for the benefit of others, the beneficiaries, according to terms set by the person who created it, the settlor. The trustee has legal title and a fiduciary duty; the beneficiaries have the benefit. Our overview of trusts in Canada explains the fundamentals in more depth.

The reason trusts matter in estate planning is control. A trust lets you decide not just who benefits from your assets, but how and when, which an outright gift or bequest cannot. That control is valuable where beneficiaries are young, vulnerable, or where you want to protect assets or manage tax across time.

The core difference: when the trust is created

The defining distinction between the two types is timing, and everything else follows from it.

A testamentary trust is written into your will and has no effect while you are alive. It comes into existence only on your death, funded by assets from your estate. Because it lives in your will, it costs little to create beyond the will itself, and you can change it anytime by updating your will. It cannot, however, do anything before you die, so it offers no help with lifetime management or incapacity.

A living trust is created by a separate trust document and funded during your lifetime by transferring assets into it. It operates immediately and continues through your life and potentially beyond. This lets it serve purposes a testamentary trust cannot, such as managing assets if you lose capacity and passing assets outside your estate. It costs more to establish and maintain, and transferring assets into it can have tax consequences.

How each is taxed

Tax is often the deciding factor, and here recent changes matter. For many years, testamentary trusts enjoyed graduated tax rates, which made them a popular income-splitting tool. That advantage has largely been removed.

Feature	Testamentary trust	Living (inter vivos) trust
Created	By your will, on death	By deed, during your lifetime
Takes effect	Only after you die	Immediately
Avoids probate	No, assets pass through estate	Yes, if funded before death
Helps with incapacity	No	Yes
General tax rate	Top marginal rate	Top marginal rate
Possible graduated rates	Graduated rate estate (first 36 months); qualified disability trust	Qualified disability trust only
Setup cost	Low (part of the will)	Higher

Today, most testamentary and living trusts are taxed at the top marginal rate on income they retain, which removes much of the historic tax appeal of testamentary trusts. Two important exceptions remain. A graduated rate estate can access graduated rates for up to 36 months after death, which is why the early administration of an estate is worth planning. And a qualified disability trust, for a beneficiary eligible for the disability tax credit, can also use graduated rates, which connects to planning such as a Henson trust. Because these rules are detailed and have changed, the tax treatment of any trust should be confirmed with your accountant.

When a testamentary trust makes sense

Even without the old tax advantage, testamentary trusts remain useful, because their real value is control over how an inheritance is received, not tax. They are commonly used to:

• Hold a minor child’s inheritance until they reach an age you specify, rather than handing a large sum to an 18-year-old.
• Provide for a beneficiary who needs protection, such as someone with a disability, a spendthrift, or a person vulnerable to influence.
• Manage a staged inheritance, releasing funds over time or at milestones.
• Provide for a surviving spouse while preserving capital for children, often used in blended families, as discussed in our guide to estate planning for blended families.

Because a testamentary trust costs almost nothing to include in a will and can be revised anytime, it is a low-commitment way to build this kind of control into your plan.

When a living trust makes sense

A living trust is more expensive and more involved, so it is used where its lifetime capabilities justify the cost. Typical reasons include:

• Probate avoidance, since assets held in the trust are not part of your estate. This can matter for larger estates, though the probate saving must be weighed against the cost and the tax of funding the trust.
• Incapacity planning, because the trustee can manage trust assets if you become unable to, complementing a power of attorney.
• Privacy, as a living trust does not become a public document the way a probated will can.
• Specific strategies, such as an alter ego or joint partner trust for those over a certain age, which allow a tax-deferred transfer of assets into the trust and can simplify succession.

Living trusts are powerful but not for everyone. The setup cost, ongoing administration and the tax on funding mean they earn their place only in particular circumstances, which is why they should be considered with professional advice rather than adopted by default.

Choosing between them

The choice is not really testamentary versus living in the abstract; it is a question of what you need the trust to do. If your goal is to control how beneficiaries receive an inheritance after your death, a testamentary trust in your will is usually the efficient answer. If you need the trust to operate during your lifetime, to avoid probate, manage incapacity or provide privacy, a living trust may be worth its greater cost. Many comprehensive plans use both, a living trust for certain lifetime objectives and testamentary trusts in the will for the next generation.

The sensible approach is to define your goals first, then let the structure follow, with your lawyer and accountant confirming the tax and legal mechanics.

Common misconceptions

A few persistent misunderstandings lead people toward the wrong structure, and clearing them up helps.

• “A living trust always saves tax.” It generally does not. Most living trusts are taxed at the top marginal rate, and transferring assets into one can itself trigger tax. The benefits of a living trust are usually about probate, control and incapacity, not income tax.
• “A testamentary trust splits income with my heirs.” This was largely true before the rules changed, but today most testamentary trusts are taxed at the top rate, so the old income-splitting rationale rarely applies.
• “A trust replaces a will.” It does not. Even with a living trust, you still need a will to deal with assets outside the trust and to appoint an executor and guardians.
• “Trusts are only for the very wealthy.” Testamentary trusts for minor children or vulnerable beneficiaries are useful at modest wealth levels, because their value is control, not size.

Approaching trusts with these corrections in mind keeps expectations realistic and the choice grounded in what the structure genuinely does.

How Hayes Wealth Partners can help

Deciding whether and how to use trusts is a question of matching the right structure to your goals around control, tax, privacy and timing. Our estate planning work helps you clarify what you want your estate to achieve, then evaluate whether a testamentary trust, a living trust, or a combination fits, modelling the tax and coordinating with the lawyer who drafts the documents and the accountant who handles the filings.

If you are considering a trust and want to understand which type serves your situation, book a private consultation and we will help you weigh the options clearly.