Succession · Cross-border estate · Canada-US treaty

Canada-US Treaty Article XXIX-B: estate-tax relief for Canadians

Article XXIX-B is the part of the Canada-US tax treaty that stops the same death from being taxed twice: once by US estate tax on your US assets, and once by Canada's tax on the capital gain those assets are deemed to realize when you die. It delivers that relief through several credits: a prorated unified credit, a marital credit, and a foreign tax credit that runs in both directions. The single most important correction to make at the outset is that the prorated credit is built on the full US exemption of USD 15 million in 2026, not on the bare USD 60,000 that is repeated all over the web.

Published June 1, 2026 Last reviewed June 1, 2026 ≈ 4,050 words · 18 min read

Direct answer · 60-second summary

What relief does Article XXIX-B give a Canadian at death?

Article XXIX-B is the treaty's death-tax coordination rule: it gives a Canadian several US estate-tax credits and stops the same asset from being fully taxed by both countries at death. The headline relief is the prorated unified credit, which equals the full US unified credit (an exemption of USD 15 million in 2026) multiplied by the share of your worldwide estate that is US-situs, not USD 60,000 multiplied by that share. There is also a marital credit that can double it when assets pass to a spouse, a small-estate rule that shields most US shares under a USD 1,200,000 worldwide estate, and a paragraph 6 mechanism that lets Canadian tax paid at death offset US estate tax. All of it must be claimed on Form 706-NA, even when the result is zero tax. Sources: Canada-US Tax Convention Article XXIX-B; CRA Income Tax Folio S5-F2-C1; IRC 2102(b); IRS Form 706-NA instructions.

Reference · terms used in this guide

Terms used in this guide

Article XXIX-B: the article of the Canada-US tax treaty titled "Taxes Imposed by Reason of Death," which coordinates US estate tax with Canadian tax at death.
Unified credit: the credit that offsets US estate and gift tax. A bare nonresident gets USD 13,000 (a USD 60,000 exemption); a US citizen gets the full credit on a far larger exemption.
Prorated credit: the treaty credit equal to the full US unified credit multiplied by the ratio of US-situs assets to the worldwide estate.
Marital credit: an additional treaty credit, available by election when US-situs assets pass to a surviving spouse, that can double the prorated unified credit.
QDOT: Qualified Domestic Trust, a US vehicle that lets a non-citizen surviving spouse defer US estate tax.
Spousal trust: a Canadian trust that defers the capital gain otherwise realized at death until the surviving spouse's later death.
Deemed disposition at death: the Canadian rule that treats a person as having sold their assets at fair market value at death, triggering capital gains tax on the accrued gain.
Foreign tax credit: a credit for tax paid to the other country, used here to prevent the same asset from being fully taxed by both at death.
US-situs assets: assets the US treats as located in the US for estate-tax purposes, such as US real estate, shares of US-incorporated companies, and US LLC interests.
Form 706-NA: the US estate-tax return for the estate of a nonresident who is not a US citizen, on which every treaty position is claimed.

Section 01What Article XXIX-B coordinates

In shortCanada has no estate tax, but it taxes the capital gain on assets deemed sold at death. The US taxes the value of US-situs assets at death. Article XXIX-B coordinates the two so the same asset is not taxed twice.

The two countries tax death in completely different ways, and that mismatch is the problem Article XXIX-B exists to solve. The United States levies an estate tax on the value of a deceased person's US-situs assets. Canada has no estate tax at all, but it treats a person as having disposed of their assets at fair market value at the moment of death, which triggers capital gains tax on the accrued gain.

For a Canadian who owns a Florida condo, both rules fire at the same death. The US taxes the condo's value, and Canada taxes the gain the condo is deemed to realize. Without a treaty, the same property would carry US estate tax and Canadian capital gains tax with no relief between them, a genuine double tax on a single asset.

Article XXIX-B, titled "Taxes Imposed by Reason of Death," is the treaty provision that coordinates the two systems. It does not exempt the Canadian from either tax; it provides a set of credits, running in both directions, so that the combined burden is not more than the higher of the two countries' taxes on the same value. The rest of this guide walks through those credits, paragraph by paragraph.

Verified fact Canada imposes capital gains tax on a deemed disposition at death rather than an estate tax, while the US imposes estate tax on the value of US-situs assets. Article XXIX-B of the Canada-US tax treaty coordinates the two to relieve double taxation at death.Sources: Canada-US Tax Convention Article XXIX-B; CRA Income Tax Folio S5-F2-C1.

Section 02The prorated unified credit (paragraph 2)

In shortThe prorated credit equals the full US unified credit (a USD 15 million exemption in 2026) times US-situs assets over the worldwide estate. The estate claims the greater of that and the bare USD 13,000 credit. It is not USD 60,000 times the ratio.

Paragraph 2 is the headline relief. Without the treaty, a Canadian nonresident has only the bare unified credit of USD 13,000, which is the tax on a USD 60,000 exemption. Paragraph 2 lets a Canadian resident who is not a US citizen claim, instead, a prorated share of the full unified credit that a US citizen would receive.

The formula is a ratio. The prorated unified credit equals the full US unified credit multiplied by (US-situs assets divided by the worldwide estate). The full credit corresponds to an exemption of USD 13.99 million in 2025 and USD 15 million in 2026. The estate claims whichever is larger: the bare USD 13,000 credit or the prorated one. Expressed as an exemption, the relief is the greater of USD 60,000 and the prorated share of USD 15 million.

This is where the most damaging error on the subject lives, and it is worth correcting in plain terms. Many online summaries, and the earlier draft of this very page, state the credit as "USD 60,000 multiplied by the ratio." That is wrong. The USD 60,000 is only the bare exemption a nonresident gets with no treaty at all. The treaty's prorated credit is built on the full US exemption, so the correct figure is USD 15 million multiplied by the ratio, expressed as an exemption. The difference is not small: using USD 60,000 instead of USD 15 million understates the available relief by a factor of hundreds, and can lead an estate to believe it owes tax when the treaty in fact erases it. If a Canadian's US-situs assets are 10% of their worldwide estate, the prorated exemption is 10% of USD 15 million, which is USD 1.5 million, not 10% of USD 60,000.

Verified fact Under paragraph 2, the prorated unified credit equals the full US unified credit multiplied by the ratio of US-situs assets to the worldwide estate. The underlying full exemption is USD 13.99 million in 2025 and USD 15 million in 2026. The estate claims the greater of the bare USD 13,000 credit and the prorated credit. The credit is not USD 60,000 times the ratio; the USD 60,000 is only the non-treaty exemption.Sources: Canada-US Tax Convention Article XXIX-B(2); IRC 2102(b); IRS Form 706-NA instructions. The percentage examples are illustrations derived from this formula.

Section 03The marital credit (paragraph 3)

In shortWhen US-situs assets pass to a surviving spouse, an election under paragraph 3 grants an additional nonrefundable marital credit, up to the amount of the prorated unified credit, effectively doubling it. It defers the tax; it does not erase it.

Paragraph 3 adds a second credit for the common case where the deceased leaves US-situs assets to a surviving spouse. By election, the estate can claim an additional marital credit, nonrefundable, up to the amount of the prorated unified credit already available. In practical terms, the marital credit can double the prorated unified credit when assets pass to a spouse outside a formal trust.

The important caveat is that the marital credit is a deferral, not an exemption. It can push the US estate tax to zero on the first death, but the US-situs assets remain in the surviving spouse's hands and are exposed again at the spouse's later death, when no spouse is left to shelter them. Treating the marital credit as if it permanently removed the tax is a common and costly misreading: it moves the tax to the second death, it does not delete it.

Verified fact Paragraph 3 allows, by election, an additional nonrefundable marital credit up to the amount of the prorated unified credit when US-situs assets pass to a surviving spouse, effectively doubling the credit. The relief defers the tax to the surviving spouse's later death rather than eliminating it.Sources: Canada-US Tax Convention Article XXIX-B(3); IRS Form 706-NA instructions.

Section 04The small-estate exception under USD 1,200,000 (paragraph 8)

In shortIf the worldwide gross estate is USD 1,200,000 or less, the US taxes only assets whose gain it could tax under Article XIII, essentially US real estate. A Canadian under that threshold who holds US shares but no US real estate is largely shielded.

Paragraph 8 contains a quiet but powerful protection for ordinary estates. If the deceased's worldwide gross estate does not exceed USD 1,200,000, the US may impose estate tax only on property whose gain, on a sale, the US would be entitled to tax under Article XIII of the treaty, the Gains article. In practice, that means US real property.

The consequence matters for the typical Canadian investor. A nonresident's gain on US shares is not taxable by the US under Article XIII; only gains on US real property are. So under a worldwide estate of USD 1,200,000 or less, a Canadian who holds US-incorporated shares but owns no US real estate is largely shielded from US estate tax by paragraph 8, even though those same shares would be US-situs and exposed for a larger estate. The Canadian with a Florida condo does not get this shelter for the condo, because real property is exactly what Article XIII lets the US tax.

Verified fact Under paragraph 8, where the worldwide gross estate does not exceed USD 1,200,000, the US may tax under its estate tax only property whose gain it could tax under Article XIII (essentially US real property). US shares of a nonresident, whose gain is not taxable under Article XIII, are therefore largely sheltered for estates at or below that threshold.Sources: Canada-US Tax Convention Article XXIX-B(8) and Article XIII; IRS Form 706-NA instructions.

Section 05Eliminating double taxation on the Canadian side (paragraph 6)

In shortCanada taxes the capital gain on the deemed disposition at death; the US taxes the value. Paragraph 6 lets Canadian tax paid at death be credited on the US return, and gives a Canadian-side deduction, so the same asset is not fully taxed by both countries.

This is the part of Article XXIX-B that is easiest to miss, because it solves the problem from the Canadian direction rather than the US one. Recall the mismatch: at death, Canada taxes the accrued capital gain through the deemed disposition, while the US taxes the value of the US-situs asset. The same Florida condo is exposed to both. The prorated and marital credits address the US tax; paragraph 6 addresses the overlap.

On the US side, paragraph 6 allows the Canadian income tax paid on the deemed disposition at death to be treated as a creditable tax on the US estate-tax return, a foreign tax credit, even though the US is not itself taxing that pre-death capital gain. The IRS accepts this precisely so that the combined Canadian and US burden on the same asset is not excessive.

On the Canadian side, the CRA Income Tax Folio S5-F2-C1 confirms that paragraph 6 provides a deduction from Canadian taxes otherwise payable, separate from the ordinary foreign tax credit in section 126 of the Income Tax Act, for taxes imposed by reason of death. The net effect is that neither country gets to tax the full value of the asset without giving credit for the other country's death tax. The mechanics of the Canadian deemed disposition itself are covered in our deemed disposition guide.

Verified fact Paragraph 6 allows Canadian income tax paid on the deemed disposition at death to be credited against US estate tax on the US return, and provides a corresponding Canadian-side deduction (separate from section 126) for taxes imposed by reason of death, so the same asset is not fully taxed by both countries.Sources: Canada-US Tax Convention Article XXIX-B(6); CRA Income Tax Folio S5-F2-C1; CRA Technical Interpretation 9604996.

Section 06QDOT and the spousal-trust bridge

In shortA QDOT for US estate-tax purposes can usually be structured to also qualify as a spousal trust for Canadian tax purposes, so one transfer to a spouse can defer both the US estate tax and the Canadian gain at death. The election is not automatic.

The marital relief and the Canadian deferral can be combined, and the vehicle that combines them is the trust. A QDOT, or Qualified Domestic Trust, is the US instrument that lets a surviving spouse who is not a US citizen defer US estate tax on assets left in the trust. A spousal trust is the Canadian instrument that defers the capital gain otherwise realized at death until the surviving spouse later dies.

The useful overlap is that a QDOT can generally be drafted so that it also qualifies as a Canadian spousal trust. When it does, a single transfer of the US-situs assets into the trust for the surviving spouse can qualify at the same time for the US marital deferral and the Canadian rollover of the deemed gain. One structure, two deferrals, on both sides of the border.

This does not happen by default. It requires deliberate drafting to meet both countries' trust conditions, and the relevant elections must be made. A trust that satisfies only one country's rules gives only one country's deferral. The detailed conditions, and the trade-offs of using a QDOT, are covered in our QDOT guide for the Canadian surviving spouse.

Verified fact A QDOT used for US estate-tax deferral can generally be structured to also qualify as a Canadian spousal trust, allowing a transfer to the surviving spouse to defer both the US estate tax and the Canadian capital gain on the deemed disposition at death. The dual qualification requires deliberate drafting and the relevant elections; it is not automatic.Sources: Canada-US Tax Convention Article XXIX-B; CRA Income Tax Folio S5-F2-C1.

Section 07The charitable deduction (paragraph 1)

In shortA bequest by a resident of one country to a charity that is tax-exempt in the other country is treated, for death-tax purposes, as if the charity were resident in the first country.

Paragraph 1 is a narrower relief, but worth knowing for estates with cross-border philanthropy. It provides that a charitable bequest by a resident of one country to an organization that is tax-exempt in the other country receives the same death-tax treatment as if the organization were resident in the first country. A Canadian who leaves US-situs assets to a qualifying charity, on either side of the border, is therefore not penalized at death by the cross-border element of the gift. For estates planning significant charitable giving alongside US assets, this paragraph lets the gift be structured without losing the charitable treatment to a residence mismatch.

Verified fact Under paragraph 1, a charitable bequest by a resident of one country to an organization exempt in the other country receives the same death-tax treatment as if the organization were resident in the first country.Sources: Canada-US Tax Convention Article XXIX-B(1).

Section 08How to claim these positions

In shortEvery treaty position, including all these credits, is claimed by filing Form 706-NA, even when the result is zero tax. The return must disclose the worldwide estate so the IRS can verify the proration.

None of these reliefs is automatic. The prorated credit, the marital credit, the paragraph 6 coordination, and the small-estate position are all claimed by the executor on Form 706-NA, the US estate-tax return for a nonresident. The return has to disclose the worldwide estate, not just the US assets, because the proration ratio depends on it. Estates are often surprised that a US filing requires them to value Canadian assets, but the ratio cannot be computed without that figure.

The filing is required even when the credits reduce the tax to zero. Skipping it forfeits the treaty position and, just as importantly, denies the heirs the stepped-up cost basis on the US assets, which can cost far more in capital gains tax on a later sale than the estate tax ever would have. That trap, and the filing mechanics, are covered in our US nonresident estate tax guide and our Form 706-NA guide.

Opinion Because every Article XXIX-B relief is claimed on Form 706-NA, the filing is not optional paperwork; it is the act that makes the treaty work for the estate. In our reading of how these files unfold, an estate that relies on the treaty without filing has not actually claimed the treaty, and is one audit away from owing the tax it assumed was gone.

Section 09Worked example

In shortA Canadian dies with a USD 2,000,000 Florida condo in a USD 20,000,000 worldwide estate. The prorated credit reduces but does not erase the US estate tax, and the Canadian tax on the condo's deemed gain is then credited against the remaining US tax under paragraph 6.

The two directions of relief are easiest to see together. Take a Canadian who dies owning a Florida condo worth USD 2,000,000, inside a worldwide estate of USD 20,000,000. Figures are in US dollars, and the dollar amounts are an illustration of the mechanism, not a calculation for any specific estate.

Step	Figure
Florida condo (US-situs)	USD 2,000,000
Worldwide estate	USD 20,000,000
US-situs share of worldwide estate	2,000,000 / 20,000,000 = 10%
Prorated exemption (2026)	10% of USD 15,000,000 = USD 1,500,000
US estate tax	Due on the value above the USD 1,500,000 prorated exemption (the prorated credit reduces, but does not erase, the tax)
Canadian deemed disposition	Canada taxes the condo's accrued capital gain at death
Paragraph 6 relief	The Canadian tax paid on that gain is credited against the remaining US estate tax on the US return
Filing	Form 706-NA required to claim both the prorated credit and the paragraph 6 foreign tax credit

The example shows Article XXIX-B working in both directions on a single asset. The prorated unified credit (paragraph 2) shrinks the US estate tax, because the worldwide estate is large the prorated exemption of USD 1,500,000 does not cover the whole USD 2,000,000 condo, so some US tax remains. Then paragraph 6 takes the Canadian income tax paid on the condo's deemed gain and credits it against that remaining US estate tax, so the condo is not taxed in full by both countries. Neither relief is available unless the estate files Form 706-NA to claim it.

Verified fact The mechanics shown (prorated exemption equal to the full US exemption times the US-situs ratio, USD 15 million full exemption for 2026, and the paragraph 6 credit for Canadian death tax against US estate tax) are verified. The dollar amounts in this example are an illustration derived from those rules, not an official quotation or a calculation for any specific estate.Sources: Canada-US Tax Convention Article XXIX-B(2) and (6); IRC 2102(b); IRS Form 706-NA instructions.

Section 10Common mistakes

In shortThe recurring errors are using the wrong prorated-credit formula, forgetting the small-estate shelter for US shares, assuming a QDOT is automatic, and not filing Form 706-NA to claim the treaty.

Stating the prorated credit as USD 60,000 times the ratio. This is the central and most expensive error, and it appeared on this page's earlier draft. The prorated credit is the full US unified credit, an exemption of USD 15 million in 2026, multiplied by the US-situs ratio. The USD 60,000 is only the bare non-treaty exemption. Using USD 60,000 understates the relief by hundreds of times and can make an estate believe it owes tax it does not.

Forgetting the small-estate shelter for US shares. Under a worldwide estate of USD 1,200,000 or less, paragraph 8 lets the US tax only US real property, so a Canadian who holds US shares but no US real estate is largely protected. Estates at that size sometimes file and pay as if the shares were fully exposed.

Assuming a QDOT qualifies as a Canadian spousal trust automatically. The dual qualification that defers both taxes requires deliberate drafting and elections. A trust built for only one country's rules gives only one country's deferral.

Relying on the treaty without filing Form 706-NA. Every Article XXIX-B relief is claimed on the return. Not filing forfeits the position and the heirs' stepped-up basis, turning a zero-tax estate into an expensive one on a later sale.

Section 11Checklist

In shortAn ordered checklist for using Article XXIX-B correctly on a Canadian estate with US assets.

Identify the US-situs assets and value the worldwide estate, since the ratio of the two drives the prorated credit.
Compute the prorated credit on the full USD 15 million exemption (2026), not on USD 60,000.
If US-situs assets pass to a spouse, consider the paragraph 3 marital credit and a QDOT structured to also be a Canadian spousal trust.
If the worldwide estate is USD 1,200,000 or less and there is no US real estate, check the paragraph 8 small-estate exception.
Coordinate the Canadian deemed-disposition tax with the US return under paragraph 6, so the same asset is not fully taxed twice.
File Form 706-NA to claim every position, even when the credits reduce the tax to zero, and disclose the worldwide estate.
Engage a cross-border estate-tax professional: the proration, the trust elections, and the paragraph 6 coordination are technical and interlocking.

Section 12FAQ

In shortThe questions Canadians ask most often about Article XXIX-B.

Is the prorated credit really USD 60,000 times the ratio? No. That is the most common error on the subject. The prorated credit is the full US unified credit, an exemption of USD 15 million in 2026, multiplied by the ratio of US-situs assets to the worldwide estate. The USD 60,000 is only the bare exemption a nonresident gets without the treaty.

I only own US stocks, no Florida property. Am I exposed to US estate tax? If your worldwide estate is USD 1,200,000 or less, paragraph 8 largely shelters you, because the US can tax only US real property at that size and a nonresident's share gain is not taxable under Article XIII. Above that threshold, US shares are US-situs and exposed, subject to the prorated credit.

Can the same Florida condo be taxed by both Canada and the US at death? Both taxes apply in principle, US estate tax on the value and Canadian capital gains tax on the deemed gain, but paragraph 6 prevents full double taxation by crediting the Canadian death tax against the US estate tax. See our Canadian estate overview for the Canadian-side administration, and the FIRPTA guide for a later sale.

Is the QDOT-to-spousal-trust treatment automatic? No. A QDOT can usually be drafted to also qualify as a Canadian spousal trust, but it takes deliberate structuring and the right elections. It does not happen by default.

Do I have to file if the credits reduce the tax to zero? Yes. Every treaty position is claimed on Form 706-NA, and filing also secures the heirs' stepped-up basis. Skipping it forfeits both.

Editorial team

CanadaFlorida Editorial Team

Research drawn from primary public sources cited at the bottom of every guide: U.S. and Florida statutes, U.S. and Canadian federal agencies, official Florida county and state authorities, and Canadian provincial bodies where applicable.

Every figure, rate, threshold, and deadline in this guide is drawn from a verifiable primary source listed at the bottom of the page. The article is updated whenever the underlying rules change, with a fresh review date stamped at the top.

Sources and references

Primary treaty text and tax authorities, verified as of the last review date. Where an exact document title could not be confirmed, the official government page is cited instead.

Convention Between Canada and the United States of America with Respect to Taxes on Income and on Capital, Article XXIX-B (Taxes Imposed by Reason of Death), paragraphs 1, 2, 3, 6, and 8 (official text, treaty-accord.gc.ca).
Convention Between Canada and the United States, Article XIII (Gains), on which the paragraph 8 small-estate exception turns.
Canada Revenue Agency, Income Tax Folio S5-F2-C1, Foreign Tax Credit (treatment of the paragraph 6 relief and taxes imposed by reason of death).
Canada Revenue Agency, Technical Interpretation 9604996 (Article XXIX-B coordination at death).
IRC § 2102(b) (unified credit for nonresidents; USD 13,000, equal to a USD 60,000 exemption).
IRS Form 706-NA, United States Estate (and Generation-Skipping Transfer) Tax Return, Estate of nonresident not a citizen of the United States, and its instructions (claiming treaty positions).
Joint Committee on Taxation, technical explanation of the Canada-US tax treaty and its death-tax provisions.

Disclaimer

This guide is for educational purpose only. Figures, rates, thresholds, timelines and rules are drawn from public sources at the date shown and may change.

Treaty relief and cross-border estate tax are technical and fact-specific. For any concrete decision, consult a cross-border tax professional, a US estate-tax attorney, and a Canadian lawyer or notary.