Cross-Border Estate and Inheritance Tax: What Happens When Assets and Heirs Are in Different Countries

Death does not simplify cross-border tax. The US imposes an estate tax on the fair market value of the deceased’s assets, with rates up to 40% and an exemption that shelters most domestic estates. Canada does not have an estate tax, but it deems a disposition of all capital property at fair market value on the date of death, triggering capital gains tax on the deceased’s final return. When a person with ties to both countries dies, or when their assets sit in the other country, both systems can apply to the same property. The treaty provides coordination rules, but the interaction between a wealth transfer tax (US) and an income tax on deemed gains (Canada) creates mismatches that require planning.

US estate tax for a US person with Canadian assets?

A US citizen or resident (including a green card holder) is subject to US estate tax on their worldwide estate, including all assets located in Canada: Canadian real property, Canadian bank accounts, shares of Canadian corporations, interests in Canadian partnerships, and Canadian retirement accounts.

The estate tax exemption for 2024 is $13.61 million per person ($27.22 million for a married couple using portability). The Tax Cuts and Jobs Act doubled the exemption, and the One Big Beautiful Bill Act made that doubling permanent at $15 million per individual ($30 million per married couple with portability) for deaths and gifts after December 31, 2025, indexed for inflation starting in 2027.

Assets above the exemption are taxed at a flat 40% rate. The estate calculates the tax on the gross estate, then applies the unified credit (which shelters the exempt amount), credits for state death taxes, and the foreign death tax credit under IRC 2014 for any Canadian tax paid on the same assets.

Canadian assets in the estate are valued in USD at the exchange rate on the date of death (or the alternate valuation date, 6 months later, if elected under IRC 2032). The estate reports Canadian assets on Form 706 (United States Estate Tax Return) as part of the worldwide estate.

On the Canadian side, the deceased’s final T1 return includes a deemed disposition of all capital property at FMV on the date of death. Canadian real property, Canadian stocks, and other capital property produce capital gains (or losses) on the final return. The capital gains inclusion rate is 50% (the proposed increase to 66.67% above $250,000 was cancelled in March 2025 and never took effect). The estate or the executor files the final T1 and pays the resulting tax.

The US estate gives a foreign death tax credit (IRC 2014) for the Canadian income tax paid on the deemed disposition, to the extent it is attributable to assets also included in the US estate. The credit is limited to the US estate tax attributable to those assets (proportional to their share of the worldwide estate).

US estate tax for a Canadian resident with US assets?

A Canadian resident who is not a US citizen or green card holder is a “nonresident non-citizen” for US estate tax purposes. The US taxes their estate only on US-situs assets.

US-situs assets include:

• Real property located in the US
• Tangible personal property located in the US
• Shares of stock in US domestic corporations (regardless of where the share certificates are held)
• Debt obligations of US persons (with exceptions for bank deposits and portfolio debt)

US-situs assets do NOT include:

• Bank deposits in US banks (exempt under IRC 2105(b))
• Proceeds of life insurance on the decedent’s life (exempt under IRC 2105(a))
• Shares of foreign corporations, even if they hold US assets
• US government bonds held by a nonresident (qualifying under IRC 2105(b))

The domestic exemption for nonresident non-citizens is only $60,000 (IRC 2102(b)), compared to $15 million for US persons (2026). A Canadian resident with $500,000 in US stocks and a Florida condo worth $1 million has a US-situs estate of $1.5 million and an exemption of only $60,000.

Treaty relief (Article XXIX-B): The treaty provides a prorated unified credit for Canadian residents. The credit is equal to the greater of $13,000 (the credit equivalent of the $60,000 exemption) or the full unified credit ($5,389,800 for 2024) multiplied by the ratio of US-situs assets to worldwide assets. For a Canadian resident with $1.5 million in US-situs assets and a $10 million worldwide estate, the prorated credit is $5,389,800 x ($1.5M / $10M) = $808,470, which shelters approximately $2.04 million of US-situs assets. If the US-situs assets are under this amount, no US estate tax is due.

The treaty also provides a marital credit (Article XXIX-B(3)) that can shelter assets passing to a surviving spouse, similar to the unlimited marital deduction available to US persons under IRC 2056.

How does Canada tax the estate?

Canada has no estate tax, gift tax, or inheritance tax. Instead, ITA 70(5) deems the deceased to have disposed of all capital property at FMV immediately before death. The accrued capital gains are included in the deceased’s final T1 return and taxed at the applicable capital gains inclusion rates.

This deemed-disposition rule applies to all capital property worldwide, including US assets. A Canadian resident who dies holding US stocks with a $200,000 cost basis and $1,000,000 FMV reports an $800,000 capital gain on their final Canadian return.

Certain rollovers defer the deemed disposition:

• Spousal rollover (ITA 70(6)): Property transferred to a surviving spouse (or a spousal trust) rolls over at the deceased’s adjusted cost base, deferring the capital gain until the surviving spouse disposes of the property or dies.
• Principal residence exemption (ITA 40(2)(b)): The family home, if designated as the principal residence, is exempt from capital gains tax.
• RRSP/RRIF rollover to spouse: RRSP and RRIF balances can roll over to the surviving spouse tax-free.

The interaction with the US estate tax creates a timing mismatch. The US estate tax is due within 9 months of death (with a 6-month extension available). The Canadian deemed-disposition tax is due with the final T1 return (due by April 30 of the year after death, or 6 months after death if the death occurs between November 1 and December 31). The two taxes may be computed on different valuations (date of death for Canada, date of death or alternate valuation date for the US).

What does the treaty do to prevent double taxation?

Article XXIX-B of the treaty addresses the estate tax coordination. The key provisions:

1. Prorated unified credit for Canadian residents with US-situs assets (described above).
2. Canadian credit for US estate tax: Canada allows a credit against the Canadian deemed-disposition tax for US estate tax paid on the same property. The credit is limited to the Canadian tax attributable to the property.
3. US credit for Canadian tax: The US allows a foreign death tax credit (IRC 2014) for Canadian income tax (deemed disposition) paid on property included in the US estate.

These credits work in opposite directions, and the taxpayer (or the estate) can generally choose which credit to use to minimize the total tax burden. In practice, the estate claims one credit on each side:

• The Canadian final return claims a credit for US estate tax paid on US-situs assets, reducing the Canadian deemed-disposition tax.
• The US estate return claims a credit for Canadian income tax paid on assets included in the US estate, reducing the US estate tax.

The credits cannot both fully offset, because the two taxes are based on different amounts (value vs gain). The US estate tax applies to the full fair market value of the asset, while the Canadian deemed-disposition tax applies only to the accrued gain (FMV minus cost basis). An asset with a high basis and a small gain will have a large US estate tax (based on value) and a small Canadian deemed-disposition tax (based on gain), making the US credit on the Canadian return nearly useless.

What reporting obligations land on the heir?

The heir’s basis in inherited property is generally the fair market value at the date of death on both sides of the border: the US step-up under IRC 1014, and the Canadian adjusted cost base reset that comes out of the deemed disposition. The two numbers should match, though currency conversion can create a small discrepancy.

The bigger issue is what the inheritance triggers going forward, not the basis itself.

• Canadian deceased, US-resident heir. If the inherited assets include Canadian accounts, Canadian mutual funds, or Canadian-listed stocks, the US heir picks up new FBAR and Form 8938 reporting on those accounts starting the year they inherit. Canadian mutual funds held inside those accounts can also be PFICs for the US heir, which brings on Form 8621 and, absent an election, punitive default tax treatment on any eventual gain or distribution.
• US deceased, Canadian-resident heir. The heir’s ACB is the FMV at date of death (Canada’s deemed-disposition rule only fires if the deceased was a Canadian resident; for a non-resident deceased, the heir’s ACB is simply FMV at death under the ordinary inherited-property rules). If the inherited assets include US investments, the Canadian heir has to track them for T1135 once the total cost of foreign property exceeds $100,000.

Neither of these is a one-time filing. They become permanent additions to the heir’s annual compliance list, and missing them carries the same penalty exposure as missing them on any other foreign account.

What about inherited RRSPs, RRIFs, and 401(k)s/IRAs?

Retirement accounts do not follow the deemed-disposition or step-up rules above; each country taxes them as income to somebody.

• RRSP/RRIF inherited by a US-resident heir. The RRSP or RRIF balance is included in the deceased’s final T1 return in full, unless it rolls over to a surviving spouse or dependent under ITA 60(l). If a US-resident heir then receives the proceeds, the US treats the payment as a distribution from a foreign pension and taxes it again. The foreign tax credit is what prevents double taxation here: the US credits the Canadian tax already paid on the deceased’s final return.
• 401(k)/IRA inherited by a Canadian-resident heir. The inherited 401(k) or IRA is subject to US income tax on distribution (unless it is a Roth). Part XIII withholding does not apply, because the payment comes from a US source, not a Canadian one. Canada taxes the distribution as pension income on the Canadian heir’s return, and the US tax paid is credited via the FTC. See inheriting a US IRA or 401(k) as a Canadian for the mechanics.

Is life insurance taxable to the beneficiary?

Life insurance death benefits are generally tax-free to the beneficiary in both countries. In Canada, the death benefit is received tax-free (though the policy’s ACB can generate a gain on disposition before death, that is separate from the death benefit itself). In the US, life insurance proceeds are excluded from gross income under IRC 101(a).

The proceeds are still pulled into the gross estate for US estate tax purposes, which is why insurance is useful as a planning tool and not just a tax-free windfall: it provides liquidity to pay the Canadian deemed-disposition tax or the US estate tax without forcing a sale of other assets.

What planning strategies reduce cross-border estate tax?

Several strategies can reduce or eliminate the cross-border estate tax exposure:

• Hold US stocks through a Canadian holding company. Shares of a Canadian corporation are not US-situs assets, even if the corporation holds US stocks. This converts US-situs stock into non-US-situs Canadian corporate shares. The downside: the holding company adds corporate-level tax on dividends and gains, and the CRA may challenge the structure under GAAR if it has no business purpose beyond estate tax avoidance.

• Use life insurance to cover the US estate tax. A Canadian resident with significant US real estate can purchase life insurance to cover the estimated US estate tax liability. The insurance proceeds are not subject to US estate tax (IRC 2105(a) exempts life insurance proceeds from US-situs assets for nonresidents).

• Cross-border estate freeze. An estate freeze (exchanging growth shares for fixed-value preferred shares) can lock the value of US-situs assets at today’s value, limiting future estate tax exposure. The growth passes to the next generation through new common shares.

• Qualified domestic trust (QDOT). If the surviving spouse is not a US citizen, the unlimited marital deduction is not available unless the assets pass through a QDOT under IRC 2056A. The QDOT defers the estate tax until distributions are made to the surviving spouse or the spouse dies.

• Treaty marital credit. For Canadian residents, the treaty’s marital credit (Article XXIX-B(3)) can shelter property passing to a surviving spouse, providing partial relief similar to the marital deduction.

Related guides:

• US Estate Tax for Canadians Who Own US Property covers the specific mechanics for non-citizen Canadians with US-situs assets, including the prorated unified credit calculation.
• Cross-Border Trusts Between Canada and the US covers how trusts with connections to both countries are taxed, including grantor trust vs non-grantor treatment and the reporting requirements.
• Cross-border divorce and property division, the tax consequences when spouses in different countries divide property
• US person inheriting from a Canadian estate, the Form 3520 requirement and how the estate’s Canadian tax affects the US heir
• Cross-border estate planning between Canada and the US, proactive strategies for wills, trusts, and asset titling that reduce the combined tax burden before death triggers the rules above
• Do I need two wills?, the situs-based will structure that avoids probate complications
• Estate planning freezes cross-border, the freeze mechanics for cross-border families
• Inheriting a US IRA or 401(k) as a Canadian, the retirement account inheritance mechanics
• Inheritance or gift from a Canadian parent, the US-person-heir perspective

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