How Canadians Reduce US Estate Tax Exposure on Florida Property and US Stocks: the Levers That Actually Work

Short version: U.S. Estate Tax for Canadians: U.S. Property at Death

The exposure math comes before the planning: a Canadian resident's estate faces US estate tax only on US-situs assets, gets a treaty unified credit pro-rated by the US share of the worldwide estate, plus a marital credit for property passing to a spouse — so with the exemption at $15 million (2026), a Canadian whose worldwide estate is under the exemption generally projects to zero US tax, and the planning question is filing mechanics, not structuring. Real exposure concentrates in two profiles: worldwide estates above the exemption (where the pro-rated credit thins), and heavy US-situs concentration inside large estates. For them, the levers sort into a hierarchy. Reduce the US-situs numerator: hold US equities through Canadian mutual fund trusts or Canadian-listed ETFs rather than directly (the fund interest is not US-situs — the cleanest large-scale fix, traded off against the US-person-heir PFIC problem if children are American); keep US bank deposits and portfolio debt (already exempt) rather than US stocks in US accounts. Leverage the property: a genuine mortgage reduces the taxable US estate under the treaty's approach to nonrecourse debt — while recourse debt gets only pro-rata effect, making loan structure a real decision, not a detail. Split and insure: spousal ownership design combined with the marital credit defers the first-death event; permanent life insurance (proceeds on a nonresident's life are not US-situs and, in Canada, arrive tax-free) funds the liability that remains rather than removing it — the honest role of insurance in this area. Restructure the ownership for the big cases: a Canadian corporation holding US recreational property largely fell out of favor (shareholder-benefit problems on personal use); trusts settled before purchase — properly designed, with the buyer never holding the property personally — remain the serious tool for eight-figure situations, priced against their complexity. And the folklore lever — joint tenancy — usually makes things worse, because the contribution rule can put the full value in the first estate anyway.

Key takeaways

• Size it first: projected worldwide estate versus the exemption; US-situs inventory (US real estate, US-listed shares held directly anywhere — including in RRSPs — tangible property in the US) versus the exempt list (US bank deposits, portfolio debt, life insurance proceeds, US equities held via Canadian funds). Most snowbird estates end the exercise needing a filing plan, not a structure.
• The default protections are treaty-based and require the return: the pro-rated credit and marital credit are claimed on a filed 706-NA with worldwide disclosure — planning that assumes them should also plan for the executor who must file for them.
• Asset-location is the highest-yield lever: US equity exposure through Canadian-domiciled funds removes it from US situs entirely, at market-identical returns — the main caution being US-person beneficiaries, for whom the funds are PFICs.
• Debt works, structure-dependently: nonrecourse mortgages reduce the taxable US estate dollar-for-dollar under the treaty's computation; recourse debt prorates. Refinancing decisions on the Florida property are estate-tax decisions.
• Insurance funds, ownership defers, trusts remove: the marital credit plus survivor planning handles first deaths; insurance converts a lumpy nine-months-after-death liability into a premium; pre-acquisition trusts (never post — retained-interest rules and Canadian attribution both punish retrofits) remove the asset from the estate for large cases willing to run a trust properly.
• What not to do: casual joint tenancy (contribution rule), corporations for personal-use property (shareholder benefit), gifting US real estate outright (US gift tax applies to nonresidents' US real property with almost no exclusion — the gift can cost more than the estate tax it avoids).

The review that produces the plan

One schedule: worldwide estate projected at life expectancy; US-situs items flagged with values; the pro-rated and marital credits computed; the shortfall, if any, identified. Then levers in cost order — relocate the equities into Canadian funds this quarter; revisit the mortgage at renewal; set the ownership and beneficiary design with the wills; price insurance against the residual; and reserve trust architecture for numbers that justify it. Reviewed at each net-worth milestone, because the exemption, the exchange rate, and the estate all move.

Worked example

A Vancouver couple, worldwide estate C$9 million, holds: a US$1.2 million Naples house (mortgage-free), US$1.8 million of US-listed stocks held directly at their Canadian broker, and the rest in Canadian assets. Exposure check: converted, their worldwide estate sits under the US exemption — the pro-rated credit alone projects their US estate tax to zero at current law, and the plan is executor-mechanics (a 706-NA with transfer certificates awaits). They restructure anyway, cheaply, against law and estate growth: the US$1.8 million of direct US stocks moves into Canadian-listed ETFs holding the same exposure (US-situs assets drop to the house alone; their children are Canadian, so no PFIC concern); title and wills route the house to the survivor to engage the marital credit at the first death; and at the mortgage renewal they keep modest nonrecourse financing in place rather than paying it off. Result: US-situs exposure cut from US$3 million to under US$1 million, both treaty credits standing behind it, no trusts, no insurance premium — and a one-page memo in the estate file telling the future executor exactly which returns to file and why the tax on them computes to zero.

Official sources

"An executor for a nonresident, not a citizen of the U.S. must file an estate tax return, Form 706-NA ... if the fair market value at death of the decedent's U.S.-situated assets exceeds $60,000." — Internal Revenue Service, Some nonresidents with U.S. assets must file estate tax returns, https://www.irs.gov/individuals/international-taxpayers/some-nonresidents-with-us-assets-must-file-estate-tax-returns

The treaty provides that "the estate of an individual (other than a citizen of the United States) who was a resident of Canada at the time of the individual's death shall be allowed a unified credit equal to the greater of" a pro-rated share — "the amount that bears the same ratio to the credit allowed under the law of the United States to the estate of a citizen of the United States as the value of the part of the individual's gross estate that at the time of the individual's death is situated in the United States bears to the value of the individual's entire gross estate wherever situated" — or the nonresident's own credit, with an additional marital credit allowed under paragraph 3 for qualifying property passing to a surviving spouse. — Canada-United States Tax Convention, Article XXIX B, https://www.canada.ca/en/department-finance/programs/tax-policy/tax-treaties/country/united-states-america-convention-consolidated-1980-1983-1984-1995-1997.html

Practitioner note

Estate-exposure meetings run in two acts: the sizing, which retires most clients' fear inside an hour, and the levers, which for the genuinely exposed sort cleanly by cost — funds instead of direct stocks first, debt structure second, ownership and insurance third, trusts only where the zeros justify them. The advice we repeat most is negative: no joint-title shortcuts, no holding companies for the beach house, no gifting the condo to the kids — each is folklore that costs more than the tax it was dodging.

See also: For why every US bank and broker asks Canadians for a W-8BEN, see why every US bank and broker asks Canadians for a W-8BEN; and browse every cross-border tax topic guide, organized by situation.

Next step

Fairlight prepares the exposure sizing and lever plan — the worldwide/US-situs schedule with treaty credits computed, asset-location restructuring, debt and ownership design, insurance pricing against the residual, and the executor memo. See cross-border pricing or book a call.