$60,000 USD Exemption Warning (26 U.S.C. 2101): For a nonresident noncitizen, the Form 706-NA filing threshold is generally $60,000 of U.S.-situated assets, subject to the specific rules in the Form 706-NA instructions. A Canadian resident may claim applicable treaty relief under Article XXIX B on the required return and supporting disclosures. The $60,000 figure is a filing threshold; it is not itself the amount of estate tax that will necessarily be owed.
Treaty Prorated Unified Credit Calculator
Statutory Framework & Cross-Border Rules
Cross-border estate planning between the US and Canada is governed by two conflicting tax philosophies: the United States levies a transfer/estate tax on physical property ownership at death under 26 U.S.C. § 2101, whereas Canada levies an income tax on unrealized capital gains through a "deemed disposition" at death under Subsection 70(5) of the Income Tax Act (ITA).
Without the U.S.-Canada Income Tax Convention (Article XXIX B), Canadian residents owning US assets would face severe double taxation. Article XXIX B provides essential relief mechanisms:
- $1.2 Million Small Estate Rule (Article XXIX B(8)): If a Canadian resident decedent's worldwide gross estate does not exceed $1,200,000 USD, U.S. estate tax is not imposed on qualifying U.S. assets.
- Prorated Unified Credit (Article XXIX B(2)): Canadian residents receive a fraction of the standard US unified credit ($5,945,800 in 2026) based on the ratio of US gross assets to worldwide gross assets.
- Marital Credit (Article XXIX B(3)): Allows a nonrefundable marital credit for qualifying property passing to a surviving spouse when treaty conditions are satisfied.
- Foreign Tax Credit Offsets (Article XXIX B(6)): Permits Canada to grant a foreign tax credit against Canadian income tax for US estate tax paid on US situs property.
Statutory Regulations & Rules
| Statutory Citation | Legal Subject | Operational Mechanism |
|---|---|---|
| 26 U.S.C. § 2101 / § 2001(c) | US Non-Resident Estate Tax Rates | Imposes 18% to 40% cumulative graduated rates ($23.8k at $100k, $67.8k at $250k, $147.8k at $500k, $345.8k over $1M) on taxable assets exceeding $60,000 USD. |
| Article XXIX B(8) | Small Estate $1.2M Exemption | Exempts U.S.-situs property from U.S. estate tax if the decedent's worldwide gross estate does not exceed $1,200,000 USD. |
| Article XXIX B(2) | Prorated Unified Credit Relief | Provides a treaty pro-rata unified credit based on the ratio of U.S.-situated gross estate to worldwide gross estate. For 2026, the U.S. basic exclusion amount is $15,000,000 and the corresponding unified credit is $5,945,800. |
| CRA ITA § 70(5) | Deemed Disposition at Death | Taxes capital assets in Canada at fair market value upon death (capital gains tax). |
| IRS Form 706-NA | Estate Tax Return for Nonresidents | Used to report the U.S.-situated gross estate and compute U.S. estate/GST tax when a Form 706-NA filing is required; treaty relief is claimed with Form 8833 when applicable. |
Frequently Asked Questions (FAQ)
Under 26 U.S.C. Section 2101, non-resident aliens (including Canadian residents who are not US citizens) are subject to US federal estate tax on US-situs assets at rates ranging from 18% to 40% if the gross value of their US-situs assets exceeds $60,000 USD at the time of death.
Under Article XXIX B, paragraph 8 of the U.S.-Canada Tax Treaty, if a decedent was a Canadian resident (and not a U.S. citizen) immediately before death and their total gross worldwide estate does not exceed USD $1,200,000, the United States will not impose federal estate tax on U.S.-situs property (provided that gains on disposition of such property are not subject to U.S. tax under Article XIII of the Treaty).
For a 2026 decedent, the U.S. basic exclusion amount is $15,000,000 and the corresponding unified credit is $5,945,800. Article XXIX B(2) generally provides a Canadian-resident non-U.S.-citizen decedent with a unified credit equal to the greater of the treaty pro-rata amount (U.S.-situs gross estate divided by worldwide gross estate, multiplied by the U.S. unified credit) or the statutory nonresident credit ($13,000), subject to applicable treaty and tax-law limitations.
For example, if a Canadian resident owns $1M of U.S. assets out of a $5M worldwide gross estate, the treaty pro-rata component would be 20% of the applicable U.S. unified credit ($5,945,800 * 20% = $1,189,160). Whether that fully eliminates U.S. estate tax depends on the taxable estate, deductions, prior gifts, and other applicable rules.
U.S.-situated property can include U.S. real estate, stock of U.S. corporations, and tangible personal property physically located in the United States, subject to the specific estate-tax situs rules. The situs of business interests and other assets depends on the type of property and applicable law.
Canada does not impose a separate federal estate or inheritance tax. Instead, Canadian income-tax rules generally deem a disposition of capital property at death (Subsection 70(5) ITA), which can trigger capital gains tax, subject to statutory exceptions, rollover rules, and specific taxpayer circumstances.
To claim the Article XXIX B pro-rata unified credit or Article XXIX B(8) relief, the executor generally files Form 706-NA within 9 months after death (unless an extension applies), attaches the treaty-based computation and Form 8833 as required by the IRS instructions, and provides supporting documentation.
Official IRS & CRA References
• IRS Form 706-NA Instructions (United States Estate Tax Return of Nonresident Not a Citizen of the U.S.): irs.gov/form706na
• IRS Publication 597 (Information on the United States-Canada Income Tax Treaty): irs.gov/p597
• US Treasury Dept: United States - Canada Income Tax Convention Article XXIX B: irs.gov/canada-tax-treaty
• Canada Revenue Agency (CRA) Deemed Disposition & Death Obligations: canada.ca/cra-deceased-tax
Cross-Border Tax Guides
Explore 401(k) to RRSP transfer guides, US substantial presence tests, and DTAA tax matrices.