TREADSTONE LAW · ONTARIO · DIGITAL LEGAL SERVICES · EST. MMXXI ·TSL
Licensed by the Law Society of OntarioFlat fees published upfrontWe reply to messages within 1 business daySign in
Home/Articles/Wills & Estates
№ 22 Wills & Estates

Qualified Disability Trust in Ontario: Tax Rules and Eligibility

A plain guide for trustees on who qualifies as a qualified disability trust, why graduated tax rates matter, and the election and filing steps involved.

Wills & Estates5 min readTSLBy the Treadstone Law Team · OntarioUpdated October 28, 2026
← All articles
Key takeaways
  • A qualified disability trust (QDT) is taxed at graduated rates, unlike an ordinary trust.
  • A QDT must be a testamentary trust arising on a particular individual's death and resident in Canada, and its return must include a joint election with beneficiaries.
  • Each electing beneficiary must be named by the deceased in the instrument creating the trust and qualify for the disability tax credit for the year.
  • The election is made on Form T3QDT, and the trust uses trust code 904.

If you are the trustee of a trust for a person with a disability, the tax bill can be a surprise. Most trusts do not enjoy the graduated tax brackets that individuals do, and that can make a real difference to how far the trust's money goes.

A qualified disability trust is a special category that gets graduated rates, but only if strict conditions are met each year. This article explains who qualifies, how the election works and what a trustee should watch. Rates and thresholds change, so confirm current figures with an accountant.

Why the trust label matters for tax

For income tax, a trust is either testamentary or inter vivos. A testamentary trust is generally created on and as a result of an individual's death, for example under a will or estate. An inter vivos trust is any trust that is not a testamentary trust.

Under section 122(1) of the Income Tax Act, tax on a trust other than a graduated rate estate or qualified disability trust is the highest individual percentage rate for the year multiplied by the trust's taxable amount, so ordinary inter vivos and ordinary testamentary trusts pay tax at the top rate with no graduated brackets. A QDT is the exception: it is taxed at graduated rates.

Who qualifies as a qualified disability trust

There are conditions on the trust and on the beneficiaries. At year end the trust must be a testamentary trust arising on a particular individual's death and resident in Canada, and its return must include an election made jointly with one or more beneficiaries, including their SINs.

Each beneficiary who joins in the election must meet three conditions:

Because the test applies each year, a trust that qualifies one year may not the next. A trust created by someone during their lifetime is inter vivos, and since a QDT must be testamentary, it would not fit.

QDT, graduated rate estate and ordinary trust compared

People often confuse a QDT with a graduated rate estate (GRE). They are different. A GRE is an estate, and it can only keep that status for up to 36 months after death. A QDT is a trust that arises on death and can continue as long as it meets the yearly conditions.

TypeTax treatmentKey condition
Ordinary trustHighest individual rate with no graduated bracketsNone for graduated rates
Graduated rate estateGraduated rates while it is a GRENo more than 36 months after death, among other conditions
Qualified disability trustGraduated ratesTestamentary, Canadian resident, joint election with an eligible beneficiary

Some GRE-only features do not carry over to a QDT. For example, only a GRE is exempt from tax instalments for 2016 and later years, and only a GRE can make the section 164(6) election to carry certain first-year losses back to the deceased's final return.

Making the election and filing

A QDT is elected on Form T3QDT and uses trust code 904. The election is part of the trust's return, so it needs to be dealt with when the T3 is prepared rather than afterwards.

A T3 return and any balance owing are due no later than 90 days after the trust's tax year-end. A resident express trust that is not a listed trust must file a T3 every year, even with no income. Trusts that file also generally need to include Schedule 15 beneficial ownership information, unless they are listed trusts.

If a T3 is filed late and there is no unpaid tax at the deadline, the penalty is $25 a day, with a minimum of $100 and a maximum of $2,500. A person who knowingly or through gross negligence makes a false statement or omission, or fails to file, under the trust reporting rules may face a penalty of the greater of $2,500 and 5% of the highest fair market value of trust property in the year, though not for listed trusts.

Income that the trust pays out to a beneficiary is taxed differently from income it keeps. A trust can deduct income that becomes payable to a beneficiary in the year, and the beneficiary includes that amount in their own income. How that interacts with a QDT election is a point to review with an accountant.

What to do next

Frequently asked questions

What is the main tax benefit of a qualified disability trust?

A QDT is taxed at graduated rates, unlike an ordinary trust. Ordinary trusts pay at the highest individual rate with no graduated brackets.

Can a trust I set up during my lifetime be a QDT?

No. A QDT must be a testamentary trust arising on a particular individual's death. A trust that is not testamentary is an inter vivos trust.

Does the beneficiary have to be named in the will?

Yes, each electing beneficiary must be named by the deceased in the instrument creating the trust. The beneficiary must also qualify for the disability tax credit for the year.

How is a QDT elected?

The election is made jointly with one or more beneficiaries and included in the trust's return. It is made on Form T3QDT, and the trust uses code 904.

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.

This is a wills & estates question

Start a file online — flat, published fees, reviewed by a licensed lawyer before a dollar is owed.

ContactStart a File →