Testamentary Trusts After 2016: the Graduated Rate Estate, the QDT, and What Cross-Border Families Still Use Them For

Testamentary trusts used to be a bracket game: a will could sprout multiple trusts, each with its own run up the graduated rates. The 2016 reforms ended it. A trust created by will is now taxed at the top marginal rate on retained income, with a calendar year end, like any inter vivos trust — with two exceptions. The graduated rate estate (GRE): the estate itself, for up to 36 months after death, if it designates itself as such — one per deceased — keeps graduated rates, a non-calendar year end, and a set of privileges wired to GRE status (notably the flexible charitable donation rules and access to certain loss carrybacks). The qualified disability trust (QDT): a testamentary trust with an electing beneficiary eligible for the disability tax credit keeps graduated rates for as long as the conditions hold. Everything else pays top rate, which changed the default advice from "trusts for everyone" to "trusts where control, protection, or disability planning justifies them." For cross-border families the 2016 rules are only half the reading: the same will-created trust is a foreign trust to the US, and its usefulness depends on who among the beneficiaries — or the deceased — is a US person.

Key takeaways

• GRE: designate in the estate's first T3; up to 36 months; graduated rates; choose an off-calendar year end for deferral; the donation flexibility (claim on the final return, the prior year, or the estate) is GRE-only and drives charitable estates.
• The 36-month clock is administrative pressure: income earned in the estate after month 36 is top-rate; executors of estates with income-producing assets plan distributions and the wind-up against the clock.
• QDT: joint election by the trust and a beneficiary who qualifies for the disability tax credit; graduated rates continue; recovery tax applies if capital ultimately goes elsewhere. For families with a disabled child it pairs with (and is compared against) the Henson-trust and RDSP toolkit.
• All other testamentary trusts: top rate on retained income — but income paid or payable to beneficiaries is taxed in their hands at their rates, so a distributing trust still splits income effectively; the 2016 rules punish accumulation, not trusts.
• US overlay: a Canadian testamentary trust is a foreign non-grantor trust to the US. A US-person beneficiary files Form 3520 for distribution years and needs beneficiary statements; accumulated income distributed later is throwback territory; PFICs inside compound it. A deceased US person's estate also has its own US filings (1041, possibly 706) running parallel to the GRE.
• Cross-border design choice: for a US-person beneficiary, trusts that distribute income currently read cleanly in both systems; trusts built to accumulate for decades collide with both the top-rate rule and throwback, and usually get redesigned.

What the GRE window is actually for

Three years is enough to do most of what estates need: realize losses and carry them back against the final return's deemed-disposition gains (a GRE-linked privilege), run the donation strategy, hold graduated-rate income while administration is genuinely ongoing, and stage distributions to beneficiaries in their best years. Executors who treat the GRE as a parking spot lose it by drift — the designation and year-end choices in the first T3 are where the value is captured or missed.

Worked example

A Victoria widow dies leaving $3 million, including a rental building and a portfolio, to be split between her son in Vancouver and her daughter in Denver — a US citizen. The will creates ongoing trusts for each child to age 40. The executor designates the estate a GRE with a November year end: the building's income is graduated-rate for up to three years; a portfolio loss in month nine is carried back against the final return's gains; her $200,000 charitable bequest is claimed where it saves the most. At month 30 the estate winds into the two trusts. The son's trust accumulates (top rate on retained income — accepted for creditor-protection reasons, mitigated by paying income out to him most years). The daughter's trust is drafted to distribute all income annually: she files a Form 3520 with a beneficiary statement each year, her distributions are current income in both countries with credits lining up person-to-person, the portfolio holds no PFICs, and no accumulation ever builds UNI for the throwback rules. Same will, two trusts, two systems — and the drafting differences between the children's trusts are entirely the daughter's passport.

Official sources

The CRA states that a graduated rate estate "is the estate that arose on and as a consequence of the individual's death, if... that time is no more than 36 months after the death" and the estate is a testamentary trust that so designates itself; a GRE is taxed at graduated rates, while other testamentary trusts are generally taxed at the top marginal rate. — Canada Revenue Agency, Types of trusts, https://www.canada.ca/en/revenue-agency/services/tax/trust-administrators/types-trusts.html

The CRA states that "Bare trusts are not subject to the trust reporting rules and are therefore not required to file a T3 return, including Schedule 15, for taxation years ending on or after December 31, 2024 and before December 31, 2026" (and were exempted for 2023 as well); other affected trusts must file a T3 with Schedule 15 for tax years ending after December 30, 2023. The T3 late-filing penalty is "$25 a day... from a minimum of $100 to a maximum of $2,500," and the gross-negligence penalty is "the greater of $2,500 and 5% of the highest amount of the fair market value of all the property held by the trust at any time in the year." — Canada Revenue Agency, New trust reporting requirements for T3 returns, https://www.canada.ca/en/revenue-agency/services/tax/trust-administrators/t3-return/new-trust-reporting-requirements-t3-filed-tax-years-ending-december-2023.html

Practitioner note

The 2016 rules made accumulation expensive and the GRE window valuable, and the cross-border overlay pushes the same direction — distribute currently to US beneficiaries and keep the trust's books US-legible. Our will reviews for families with a US child almost always end with two differently drafted trusts, because one document trying to serve both children serves neither.

See also: Browse every cross-border tax topic guide, organized by situation.

Next step

Fairlight prepares the will and trust review for the 2016 rules and the US overlay — GRE designation strategy, QDT eligibility, and per-beneficiary trust design. See cross-border pricing or book a call.