Testamentary trusts after 2016: GRE and QDT rules in Canada

A testamentary trust is any trust that arises on (and because of) a person’s death, typically created by a will. Until the end of 2015, these trusts had a major advantage over inter vivos trusts: they paid tax at the same graduated rates as individuals. A testamentary trust earning $50,000 paid far less tax than an inter vivos trust earning the same amount, because the inter vivos trust was taxed at the top marginal rate on every dollar. That benefit is gone. Since January 1, 2016, the default rule is that all testamentary trusts pay tax at the top marginal rate (currently around 33% federal, plus provincial, pushing the combined rate above 50% in most provinces). The 2014 budget eliminated the graduated-rate advantage for testamentary trusts, with two exceptions that still get preferential treatment: graduated rate estates (GREs) and qualified disability trusts (QDTs).

If you’re dealing with a Canadian estate that has cross-border beneficiaries, understanding these two exceptions isn’t optional. They control the tax rate on estate income, the fiscal year-end, the ability to carry back losses and charitable donations to the deceased’s terminal return, and the practical timeline for distributing assets. Getting the designation wrong (or missing it entirely) can cost the estate tens of thousands of dollars in the first 36 months alone.

What changed for testamentary trusts in 2016?

Before 2016, every testamentary trust paid tax at graduated rates, the same brackets that apply to individuals. An estate earning $50,000 of investment income paid roughly $7,500 in federal tax. After 2016, the same income is taxed at the top federal rate of 33%, costing $16,500 federally alone (over $26,000 combined in Ontario). The 2014 budget closed the gap because testamentary trusts were being used as long-term income-splitting vehicles, not just short-term administration tools. Only two exceptions survive: GREs (genuine administrative need, 36-month cap) and QDTs (disability-related policy reason).

• The change applies to all testamentary trusts regardless of when they were created
• An estate that stayed open for decades could previously shelter investment income at graduated rates indefinitely; that benefit is now gone

What’s a graduated rate estate?

A graduated rate estate (GRE) is defined in ITA 248(1). It must meet four conditions: the estate arose because of the individual’s death, no more than 36 months have passed since death, the estate is designated as a GRE in its first T3 return, and it is the only estate so designated for that deceased. The designation is irrevocable, and graduated rates mirror the individual brackets (15% on the first $57,375 of federal taxable income in 2026, then 20.5%, and so on). The real value of GRE status extends well beyond the rate advantage.

• You cannot have two GREs for the same person
• For an estate earning moderate income during administration, graduated rates save a substantial amount compared to the flat top rate

What does GRE status actually unlock?

GRE status provides four benefits no other testamentary trust gets: graduated tax rates on estate income, an off-calendar fiscal year-end, charitable donation carry-back to the deceased’s terminal return under ITA 118.1(5.1), and loss carry-back under ITA 164(6). The off-calendar year-end lets the executor control when income gets reported, managing brackets across multiple fiscal periods within the 36-month window. The donation carry-back is especially valuable when the deceased had a large deemed-disposition tax bill.

• If someone dies on March 15, the GRE can choose a March 14 year-end, capturing nearly 12 months in the first fiscal year with the T3 due 90 days later
• The donation carry-back under ITA 118.1(5.1) offsets the deemed disposition tax on the terminal return; without GRE status, that credit is trapped in the estate’s T3 at the top rate
• The loss carry-back under ITA 164(6) directly offsets deemed capital gains on the terminal return; it is available only in the estate’s first taxation year and only while the estate is a GRE

How does the 36-month clock work?

The 36-month period runs from the date of death, not from the GRE designation or the first T3 filing. If someone dies on June 10, 2025, the GRE window closes June 10, 2028, and every benefit (graduated rates, off-calendar year-end) disappears on that date. The estate becomes a regular testamentary trust taxed at the top marginal rate with a mandatory December 31 year-end. Complex estates with business interests, multi-jurisdiction property, or contested debts can easily exceed three years, so executors should prioritize early distributions or realize gains within the window.

• Income earned after the 36-month window closes is taxed at the top rate with no relief mechanism
• CRA will not extend the period; there is no discretionary extension or “reasonable delay” exception

What’s a qualified disability trust?

A qualified disability trust (QDT) under ITA 122(3) is a testamentary trust where at least one beneficiary is eligible for the disability tax credit under ITA 118.3. The trust and beneficiary file a joint election each year (no permanent election). A QDT gets graduated rates without a time limit, making it the primary tool for families providing for a disabled member through a testamentary trust. Unlike a GRE, it does not get an off-calendar year-end or carry-back provisions.

• An estate can be a GRE for the first 36 months and then convert to a QDT if requirements are met, losing the GRE-specific benefits but retaining graduated rates
• This GRE-to-QDT transition is the standard planning pattern for a family trust created by will for a disabled beneficiary

What happens when the GRE window expires?

On the day the 36-month period ends, the estate’s fiscal year is deemed to end and the estate becomes a regular testamentary trust. The year-end shifts to December 31, graduated rates are gone, and all income is taxed at the top marginal rate. Carry-back provisions for donations and losses also end (though claims already filed are not reversed). The forced year-end on the anniversary creates a short fiscal period that the executor must plan around to avoid concentrated income.

• If the estate’s year-end was September 30 and the GRE expires June 10, you get a short year from October 1 to June 10, then another short year from June 11 to December 31
• For estates with ongoing income (rental properties, investment portfolios), the expiry is the point to evaluate distributing assets to beneficiaries so income is taxed at their individual rates

How should executors use the GRE window?

The 36-month window is a planning opportunity, not just a countdown. The executor should consider these moves in roughly the order listed, because timing drives the tax savings.

• Realize capital gains early. Selling assets with unrealized gains inside the GRE means graduated rates apply. After the window, the same gains are taxed at the top rate. Especially relevant for real property or private company shares.
• Time distributions using ITA 104(13.4). A GRE can designate income as payable to beneficiaries, shifting it to their returns at their marginal rates. The designation is made in the T3 and requires modeling the combined tax across the estate and all beneficiaries.
• Make charitable donations. Executing a charitable bequest during the GRE period allows carry-back to the terminal return under ITA 118.1(5.1), offsetting the deemed disposition tax.
• Carry back losses. Capital or non-capital losses realized in the estate’s first taxation year can be carried back to the terminal return under ITA 164(6), directly offsetting the deemed disposition inclusion.

What’s the income-splitting play with ITA 104(13.4)?

ITA 104(13.4) allows a GRE to designate a portion of its income as payable to a beneficiary, even if the income is not physically distributed. The designated amount is included in the beneficiary’s income (not the estate’s), and the beneficiary pays tax at their own marginal rate. This designation is available only to GREs. For an estate earning $200,000 with three beneficiaries in modest brackets, splitting it to $66,667 each can substantially reduce the combined tax.

• The designation is made in the T3 return for the year and is irrevocable once filed
• If a beneficiary has substantial other income, the designation may push them into a higher bracket than the estate itself, making it counterproductive
• This analysis needs to happen every year during the GRE period

What if a beneficiary is a US person?

When a beneficiary is a US citizen, green card holder, or US resident, the entire analysis changes. The US treats any Canadian trust as a “foreign trust,” layering US tax rules on top of the Canadian ones. Most Canadian testamentary trusts are non-grantor trusts from the US perspective (the deceased settlor is gone, and beneficiaries typically lack enough control under IRC 671-679 to be treated as owners). The result is often more total tax than either country’s rules would produce alone.

• The US classifies foreign trusts as either “grantor trusts” (US person treated as owner) or “non-grantor trusts” (trust is a separate taxpayer)

For a non-grantor foreign trust, the US applies the accumulation distribution rules under IRC 665-668 to any distribution that exceeds the trust’s current-year distributable net income (DNI). The IRS allocates the excess to prior years when the trust earned income but didn’t distribute it, taxes the allocated amount at the beneficiary’s highest marginal rate for each year, and adds an interest charge calculated from the year the income was earned to the year of distribution. As we’ve covered in our full treatment of Canadian trusts with US beneficiaries, the interest charge alone can double the effective tax rate over a 10-15 year accumulation period.

The practical implication for GRE planning: distribute to US-person beneficiaries every year, without exception. Accumulating income inside the estate (even during the GRE period when Canadian rates are low) creates accumulation distribution exposure on the US side. The Canadian tax savings from graduated rates are dwarfed by the US interest charge on accumulated distributions.

How do the US reporting requirements work?

A US-person beneficiary has annual filing obligations regardless of distributions. Form 3520 is due with the US return; if the trust distributes, the beneficiary reports it in Part III. The penalty for failing to file is the greater of $10,000 or 35% of the gross reportable amount. If the US person is treated as an owner under the grantor trust rules, Form 3520-A is also required. The compliance cost (often $2,000-5,000 per year) is itself a reason to consider distributing assets outright and winding up the US beneficiary’s share.

• The Canadian trustee is technically responsible for Form 3520-A, but in practice the US beneficiary’s advisor usually prepares it
• The beneficiary may also need to report the trust on FBAR (FinCEN 114) and Form 8938 if the value exceeds the thresholds
• These obligations continue for as long as the trust exists, regardless of distributions

For a deeper look at how the US-Canada tax treaty interacts with trust distributions and withholding, including the Part XIII withholding on trust income paid to non-resident beneficiaries, the treaty’s reduced rates can partially offset the US tax, but they don’t eliminate the accumulation distribution problem.

Should you accumulate or distribute during the GRE?

The answer depends almost entirely on who the beneficiaries are. For Canadian-resident beneficiaries, there is a real trade-off: income retained in the GRE is taxed at graduated rates, which may be lower than the beneficiaries’ individual rates if they have high incomes. For US-person beneficiaries, the answer is almost always “distribute,” because the US accumulation distribution penalty under IRC 665-668 overwhelms the Canadian graduated-rate benefit. The interest charge compounds at the underpayment rate (recently 7-8%), so even a two-year accumulation produces a material cost.

• The executor should model both retain-and-distribute scenarios each year for Canadian-resident beneficiaries
• In rare cases, the US beneficiary’s FTC under IRC 904 may fully offset the US tax on a current distribution, but the default advice stands: distribute currently to US beneficiaries

How do you plan for the GRE-to-regular trust transition?

The transition from GRE to regular testamentary trust at the 36-month mark is the highest-stakes deadline in Canadian estate administration. Here’s a checklist for executors approaching the expiry.

Before the 36-month deadline:

1. Sell any assets with unrealized gains that the estate intends to dispose of. Capital gains realized inside the GRE are taxed at graduated rates; the same gains realized one day later are taxed at the top rate.

2. Make all charitable donations that qualify for carry-back to the terminal return under ITA 118.1(5.1). Once the GRE expires, the carry-back option is gone permanently.

3. Evaluate whether to distribute income-producing assets (rental properties, investment accounts) to beneficiaries outright. After the GRE expires, income earned inside the estate is taxed at the top rate. If beneficiaries have lower marginal rates, distributing the assets to them (so the income is earned in their hands) saves tax.

4. File all outstanding T3 returns. The transition creates a deemed year-end, so any unfiled returns for earlier periods should be current before the transition period creates additional complexity.

5. For estates with US beneficiaries, distribute all accumulated income before the GRE expires. The GRE-to-regular-trust transition doesn’t change the US accumulation distribution analysis, but it adds urgency: once the estate is at the top Canadian rate, there’s no Canadian-side benefit to retention, and the US-side cost of retention keeps compounding.

After the 36-month deadline:

The estate continues as a regular testamentary trust. The year-end is December 31. Tax is at the top marginal rate. The executor should consider whether the trust still needs to exist. If the trust’s purpose was estate administration (not long-term asset protection or income-splitting for a disabled beneficiary under a QDT), winding up the trust and distributing the remaining assets to beneficiaries is usually the right move. Keeping a regular testamentary trust open is expensive: top-rate tax, annual T3 filing costs, and (for US beneficiaries) ongoing Form 3520 compliance.

If the trust qualifies as a QDT (because a beneficiary is DTC-eligible and willing to file the joint election), the transition from GRE to QDT preserves graduated rates. But the executor should still evaluate whether a Henson trust or discretionary trust structure is the right vehicle, or whether the assets should be held in a different way (such as an RDSP) that provides better integration with provincial disability benefits.

What if you missed the GRE designation?

If the executor did not designate the estate as a GRE in the first T3 return, the designation is lost. CRA has no administrative process to grant a late designation. The estate is treated as a regular testamentary trust from the start: top marginal rate, December 31 year-end, no carry-back provisions. The executor may be personally liable to beneficiaries for the tax cost, depending on the province’s trustee liability rules. The GRE designation is a single checkbox on the T3, but missing it is irreversible.

• For cross-border estates, the filing coordination between the Canadian T3 and the US Form 1041 or Form 706 adds further complexity
• Engaging a CPA who handles estate returns within the first few months after death is the strongest guard against this mistake

This guide is general information, not tax advice for your specific situation. Which points apply, and how, depends on your facts.