Why Most Trusts in Canada Pay Tax at the Highest Rate

People setting up or inheriting a trust often assume it works like a personal tax return — a set of graduated brackets, a basic personal exemption, rates that start low and climb only as income rises. For most Canadian trusts, that assumption is wrong. The general rule is the opposite: income a trust keeps for itself is generally taxed at the top marginal personal rate, from the very first dollar, with no basic personal exemption to shelter any of it.

This article explains why that rule exists, who actually benefits from the narrow exceptions to it, and what it means for anyone setting up or administering a trust in Ontario.

The General Rule

With limited exceptions, income that a trust retains — rather than paying or making payable to a beneficiary in the year it is earned — is taxed to the trust itself at the top marginal rate, without the graduated brackets or basic personal exemption an individual taxpayer gets. This applies to most family trusts and to most testamentary trusts created under a will, once any special initial-period treatment has ended.

Why the Rule Exists

The policy reasoning is straightforward: without a flat top rate, a person could spread income across multiple trusts to access multiple sets of graduated brackets and personal exemptions, multiplying tax relief that was only ever meant to apply once per individual. A trust is not a person living a life with ordinary personal expenses — it is a legal arrangement holding property for someone else's benefit. Taxing retained trust income at the top rate by default removes much of the incentive to use trusts purely as a rate-splitting tool.

Exception One: The Graduated Rate Estate

A deceased person's own estate is treated differently — but only for a limited initial period after death. During that window, the estate can generally access the same graduated rates an individual taxpayer would, rather than the flat top rate. Once that period ends, the estate is generally taxed the same way as any other trust going forward.

Exception Two: A Trust for a Qualifying Disabled Beneficiary

A further, narrower exception exists for certain trusts that have a beneficiary eligible for the disability tax credit. In some circumstances, such a trust can access graduated rates rather than the flat top rate. The eligibility conditions are technical and depend on the specific beneficiary's status and the trust's structure — this is not something to assume applies just because a beneficiary has a disability; it needs to be confirmed with an accountant familiar with the current rules.

What This Means in Practice for Ontario Families

Anyone considering a testamentary trust in their will — for a minor child, a beneficiary with a disability, or simply to protect assets for a beneficiary who isn't ready to manage them outright — should go in understanding that, outside the narrow exceptions above, income the trust keeps will generally be taxed at the top rate. That reality should factor directly into how the trust is drafted and how the trustee plans to allocate income year to year, rather than being discovered after the fact when the first T3 return comes due.

Common Misconceptions

• "Trusts get their own set of tax brackets, separate from the beneficiaries." Not true outside the narrow exceptions above — the default is a single flat top rate on retained income.
• "Once money is inside a trust, it's automatically taxed more cheaply." Often the opposite is true if the income is retained rather than allocated out to a beneficiary in a lower bracket.
• "Every trust for a disabled beneficiary automatically qualifies for better rates." It does not happen automatically — specific conditions have to be met and confirmed.

Frequently asked questions