When a Canadian resident dies owning US assets, two tax systems fire at once. The United States levies estate tax on a nonresident’s US-situs assets above a $60,000 USD filing threshold, at graduated rates that reach 40 percent; Canada charges no estate tax but treats death as a deemed sale of every capital property at fair market value and taxes the gain on the final return.[IRS, Estate tax for nonresidents not citizens of the United States, 2026-07] Article XXIX-B of the Canada-US tax treaty reconciles the two: a pro-rated share of the full US exemption, a marital credit for property passing to a spouse, and a Canadian credit for any US estate tax that survives.
Our read: at 2026 exemption levels, the treaty credit zeroes out the US estate tax bill for nearly every Canadian-resident estate. What remains is a hard filing obligation, Form 706-NA within nine months of death plus a treaty disclosure, and the Canadian capital gains bill on the terminal return. The estates that still lose are large ones concentrated in US assets, and any estate whose executor never files. This page owns the treaty mechanics; wills, ownership structures, and the country-by-country playbook live in cross-border estate planning for Canadian buyers.
One death, two systems
| US estate tax (nonresident) | Canadian deemed disposition | |
|---|---|---|
| What is taxed | Fair market value of US-situs assets | Accrued capital gain on all capital property |
| Legal basis | IRC chapter 11; Form 706-NA regime | Income Tax Act, subsection 70(5) |
| Rate | Graduated, up to 40% of asset value | One-half of the gain, at the deceased’s marginal rate |
| Threshold | $60,000 USD in US-situs assets triggers filing | None; applies from the first dollar of gain |
| Who pays | The estate, before assets transfer | The deceased, on the terminal T1 |
| Deadline | 9 months after death | The terminal return’s normal filing deadline |
| Spousal relief | Marital deduction (US-citizen spouse or QDOT), or treaty marital credit | Rollover at cost to a surviving spouse under 70(6) |
US estate tax is a wealth levy: it taxes the value of what the decedent owned, gain or no gain. Canada’s charge is an income tax event: subsection 70(5) deems every capital property sold at fair market value immediately before death, and the resulting gain lands on the deceased’s final return.[Income Tax Act, section 70 — deemed disposition on death, 2026-07] A Florida condo bought at US$400,000 and worth US$700,000 at death produces a US calculation on the full US$700,000 and a Canadian calculation on the US$300,000 gain. Same condo, same death, two different tax bases.
What the US counts as yours: the situs rules
The US estate tax reaches a nonresident noncitizen only through US-situs assets, and the situs list is broader than most Canadian owners expect: US real estate, tangible personal property physically in the US, and shares of corporations organized under US law, even when the certificates sit in a Canadian brokerage account.[IRS, Some nonresidents with US assets must file estate tax returns, 2026-07] The Toronto retiree who never bought US property but holds US$500,000 of Apple and Microsoft in a non-registered account has a US-situs estate five times larger than her Arizona-condo-owning neighbour.
Excluded from US situs: securities generating portfolio interest, bank deposits not connected to a US trade or business, and certain life insurance proceeds. That is why a US bank account rarely creates exposure while a US stock portfolio always does.
The $60,000 USD figure is a filing threshold, not an exemption. Statute gives a nonresident’s estate a unified credit of just $13,000 USD, the amount that shelters exactly $60,000 USD of assets, and requires Form 706-NA within nine months of death whenever US-situs assets plus adjusted taxable gifts exceed that line.[IRS, Instructions for Form 706-NA (Rev. September 2025), 2026-07] Compare the domestic side: a US citizen or resident dying in 2026 excludes US$15 million, indexed and made permanent by the One Big Beautiful Bill Act.[IRS, Tax inflation adjustments for tax year 2026, including amendments from the One, Big, Beautiful Bill, 2026-07] That 250-to-1 gap is the reason Article XXIX-B exists. Above the credit, the unified rate schedule climbs to a top rate of 40 percent.[Internal Revenue Code, section 2001(c) — rate schedule, 2026-07]
Canada’s answer: a capital gains bill, not an estate tax
Canada abolished federal estate tax in 1972 and replaced it with the deemed disposition: the gain or loss on every capital property lands on the deceased’s final return, with recapture added for depreciated rental property.[CRA, Taxable capital gains on property, investments, and belongings when someone dies, 2026-07] The inclusion rate is one-half; the proposed increase to two-thirds was cancelled in March 2025.[Prime Minister of Canada, cancellation of the proposed capital gains inclusion rate increase, 2026-07]
Two Canadian features soften the event. Property passing to a surviving spouse or a qualifying spousal trust rolls over at cost under subsection 70(6), deferring the whole gain until the survivor sells or dies. And because the charge is an income tax, foreign tax paid on the same property can enter the credit machinery; Article XXIX-B builds on that below.
Provincial probate fees still apply in most provinces: court charges on the value passing through the will, untouched by any treaty.
For American readers the mirror image applies: a US resident dying with Canadian real property faces the deemed disposition on that property as taxable Canadian property, plus US estate tax on the worldwide estate, and the treaty credits Canadian income taxes payable at death against the US estate tax on those assets.
Article XXIX-B: the treaty layer
The 1980 treaty originally ignored death taxes; the Third Protocol added Article XXIX-B, in force since November 1995, to bridge an estate tax and an income tax that would otherwise stack.[Canada-United States Tax Convention Act, 1984 — Third Protocol text including Article XXIX-B, 2026-07] Four mechanisms matter.
The pro-rated unified credit
Instead of the statutory $13,000 USD, a Canadian resident’s estate claims a share of the full US unified credit, pro-rated by the ratio of the US-situs estate to the worldwide estate.[Department of Finance Canada, consolidated Canada-US Tax Convention, Article XXIX-B, 2026-07] The arithmetic favours almost everyone. A Canadian dying with a US$600,000 Palm Springs house inside a US$3 million worldwide estate holds 20 percent of her assets in the US, so the estate claims 20 percent of the US$15 million exemption: US$3 million of shelter against US$600,000 of exposure. No US tax.
The catch: claiming the pro-rated credit means disclosing and documenting the entire worldwide estate to the IRS on Form 706-NA, not just the US assets.
The marital credit
Where US-situs property passes to a surviving spouse, the treaty adds a second, non-refundable credit equal to the lesser of the unified credit allowed to the estate and the US estate tax otherwise imposed on that property. The executor must elect the treaty benefit and waive the US domestic marital deduction to take it.[IRS, Instructions for Form 706-NA, line 10 — Canadian marital credit, 2026-07] The shelter effectively doubles for married couples, pushing the break-even point for a US-heavy estate far beyond what most cross-border owners hold. Unmarried partners get nothing from this paragraph.
The small-estate rule
For a Canadian-resident decedent whose worldwide gross estate is US$1.2 million or less, the US may impose estate tax only on property whose sale gains the US could have taxed under the treaty’s gains article, in practice US real property and little else. A modest estate holding only US securities escapes US estate tax, whatever the situs list says.
Canada’s side of the bridge
Article XXIX-B also works in the other direction: US federal and state estate taxes paid on US-situs property can be credited against the Canadian income tax generated by the deemed disposition of that same property in the year of death. One property, one death, one net tax. The credit only helps where there is Canadian tax on the same asset to absorb it: a US vacation home with no accrued gain produces a US estate tax bill and nothing to credit it against.
The paperwork that makes the relief real
None of this relief is automatic. The estate claims treaty benefits on Form 706-NA with a treaty-based return position disclosed; the pro-rata and marital credits each need their own computation statements. Miss the return and the treaty position is never on file; the nine-month clock and interest run regardless.
Most families meet the enforcement layer before any tax notice: US brokers and transfer agents will not release a nonresident decedent’s US assets without an IRS transfer certificate, the document confirming the estate tax has been paid or provided for. Where no return was required, obtaining one still takes the IRS 12 to 18 months.[IRS, Transfer certificate filing requirements for the estates of nonresidents not citizens of the United States, 2026-07] An estate that ignores the US filing does not dodge the tax; it freezes the account.
Where the treaty stops: succession law on the ground
Article XXIX-B decides how much tax a death triggers. It says nothing about who inherits, and for property in a civil-law country the local succession code can override a Canadian or US will. In the EU, Regulation 650/2012 lets a foreign owner elect the succession law of their nationality in a will; without that election the law of habitual residence, or the property’s local regime, fills the gap.[Regulation (EU) No 650/2012 on jurisdiction, applicable law and succession (EUR-Lex), 2026-07]
| Country | Succession posture | Detail lives at |
|---|---|---|
| Spain, Italy, Portugal | Reserved shares for children; EU nationality-law election available | Spain for American buyers and siblings |
| Mexico | Broad testamentary freedom; the local testamento is the tool | Mexico taxes for Canadian buyers |
| Dominican Republic | French-inherited reserved portions | DR taxes for Canadian buyers |
| Costa Rica, Panama, Belize | Largely free disposition, subject to dependant-support claims | Country tax pages |
The table is coarse on purpose; each country page carries the buyer-level tax detail.
Who comes out worst
The system is forgiving in the middle and harsh at the edges. Three profiles carry real exposure. The US-concentrated large estate: a Canadian whose worldwide estate exceeds the US exemption, or whose assets sit mostly in the US, gets a pro-rated credit too small to cover the bill, and 40 percent marginal rates apply to the excess. The unmarried couple: the marital credit and the 70(6) rollover both key off a spouse, so a surviving common-law partner outside those definitions can face US estate tax and an undeferred Canadian gain in the same year. And the unprepared executor: a family that discovers Form 706-NA eighteen months after death has already bought itself frozen US accounts, interest, and a transfer-certificate queue.
US citizens living in Canada are a separate case: the US taxes their worldwide estate regardless of residence, and the treaty’s savings-clause carve-outs, not the pro-rata credit, do the work. That analysis sits with how the Canada-US tax treaty works.
Frequently asked questions
Does Canada have an estate tax? No. Canada taxes death through the deemed disposition of capital property at fair market value under subsection 70(5), an income tax on accrued gains. Provincial probate fees apply to estate administration but are court charges, not a death tax.
Do US stocks in a Canadian brokerage count as US-situs? Yes. Shares of US-incorporated companies are US-situs wherever the account sits. This is the most commonly missed exposure among Canadians who own no US real estate.
Is tax owed the moment US assets pass US$60,000? Not usually. The $60,000 USD line triggers the Form 706-NA filing; the treaty’s pro-rated credit then typically eliminates the tax itself at 2026 exemption levels. The return, filed within nine months, is what makes the credit claimable.
Can the same property be taxed by both countries at death? The treaty is built to prevent it: US estate tax paid on US-situs property is creditable against the Canadian tax from the deemed disposition of that property. With no Canadian gain to tax, the US bill stands alone.
Where this fits in the library
The taxes hub frames residency, treaties, and credits as one system, and the Canada-US treaty page covers the income-side articles this page skips. Cross-border estate planning turns these mechanics into a drafting plan. Two lifetime events change the math before death: the departure tax triggers its own deemed disposition on emigration, and T1135 reporting keeps foreign holdings visible to CRA.