Departure Tax Paid to Canada, Gain Taxed Again in the US? The Treaty Election That Resets Your US Basis

The double-tax problem at departure is structural and the treaty's fix is elegant, which makes it strange how often it is missed. The problem: on emigration Canada deems a disposition at fair market value and taxes the accrued gain (the departure tax); the individual then becomes a US resident holding the same property with a US basis equal to historical cost — the US does not step up basis on arrival; when the property is later sold, the US taxes the entire gain from historical cost, including the pre-departure portion Canada already taxed, and the foreign tax credit cannot rescue it because the Canadian tax was paid in the departure year, the US gain arises in the sale year, and the credit mechanics do not carry the Canadian departure tax forward to offset a US gain realized years later on the same property. The fix: Article XIII(7) of the treaty provides that where an individual who ceases to be a resident of one country and becomes a resident of the other is treated by the first country as having alienated property and is taxed there, the individual may elect to be treated for purposes of taxation in the other country as having sold and repurchased the property for its fair market value immediately before the change of residence — so the US-bound emigrant who elects is treated for US purposes as having sold the property the day before becoming a US resident at the value Canada used, recognizing the pre-departure gain for US purposes in a year when they were not a US resident (and therefore owing no US tax on it, since a nonresident alien's gain on most property is not US-taxable), and reacquiring the property with a US basis equal to that value — the US then taxes only post-departure appreciation on the eventual sale, aligned with Canada's treatment. Which property: the election applies to property that Canada deemed disposed on departure — the same T1161 categories (private company shares, investment accounts, partnership interests, other non-exempt property) — and property outside the departure tax (Canadian real property, which Canada taxes on the actual sale as taxable Canadian property; RRSPs, taxed on distribution) is not covered, since the US basis on those runs on their own rules (Canadian real property sold by a US resident is taxed by both countries on the actual sale, with the credit working normally in the same year). How it's made: the election is a treaty-based return position on the individual's US return for the year the residency changes — disclosed on Form 8833 (the treaty-position guide), with a statement identifying the property, the fair market value used by Canada, and the election under Article XIII(7); for a nonresident alien's pre-residency period, the deemed sale itself is not reported as taxable (it falls in the nonresident period, and gains on non-US-real-property assets are not US-source), but the election statement and the basis records are what establish the stepped-up basis for the later sale; the election is made property by property and is generally treated as irrevocable. What happens without it: the eventual US sale is taxed from historical cost; the pre-departure gain — already taxed by Canada at departure — is taxed again by the US at long-term rates plus the net investment income tax; and the only relief is an argument, in the sale year, that the Canadian departure tax is creditable against the US tax on the same gain notwithstanding the timing difference (a position with some support in the treaty's relief article and in the IRS's own guidance on timing mismatches, but one that is contested, requires a careful Form 1116 computation with the credit sourced to the year of the Canadian tax, and frequently fails on the credit limitation's year-by-year mechanics) — the reason the election, which avoids the argument entirely, is the standard practice. The interactions: the emigrant who elects the security deferral in Canada (paying the departure tax later) still makes the US election on the same emigration values — the US election tracks Canada's deemed disposition, not Canada's payment timing; the emigrant whose property later falls and who uses the Canadian loss election (the loss guide) has a US basis at the emigration value producing a US capital loss on the decline — the two elections together give a symmetric result in both countries; the emigrant who returns to Canada and uses the unwind election restores the Canadian cost base while the US basis remains at the emigration value (a mismatch that matters only if the returnee remains a US person); and the US-citizen emigrant leaving Canada — a US citizen was a US taxpayer throughout, so the deemed sale under the election is a taxable event on their 1040 for the departure year, with the Canadian departure tax creditable against it in the same year (the alignment works, and the credit works, because the years match — the election converts a future double tax into a current single tax with a working credit, which for a US citizen is the entire point). The mirror direction is not symmetric: Canada steps up basis on arrival for all newcomers (the arrival-basis guide), so the American moving to Canada gets a Canadian basis at fair market value automatically, and the US — which taxes citizens on worldwide income regardless — keeps historical basis with the same timing-mismatch problem in reverse when a Canadian-resident US citizen sells; the treaty election runs the other way for a US-to-Canada mover only where the US treats the departure as a disposition (the expatriation regime for covered expatriates, where the deemed sale is a US event and Canada's arrival step-up already aligns). The practical rule for the northbound-to-southbound emigrant: every property on the T1161 with an accrued gain gets the Article XIII(7) election on the first US return, documented with the Canadian valuation, and recorded in a basis ledger that will be the source document for the US sale years later.

Key takeaways

• The problem: Canada taxes accrued gains at departure; the US keeps historical basis on arrival; the later US sale taxes the pre-departure gain again, and the foreign tax credit can't reach across the years.
• The fix — Article XIII(7): elect to be treated for US purposes as having sold and repurchased the property at Canada's departure value the day before US residency — the pre-departure gain falls in the nonresident period (untaxed by the US), and the US basis resets to the departure value.
• Which property: everything Canada deemed disposed (the T1161 categories); Canadian real property and RRSPs are outside it and taxed on their own timing.
• How: a treaty-based position on the first US return, disclosed on Form 8833 with the property, the Canadian value, and the election — property by property, generally irrevocable, with a basis ledger kept for the eventual sale.
• Without it: double taxation of the pre-departure gain, or a contested timing-mismatch credit argument that frequently fails on Form 1116's year-by-year mechanics.
• Interactions: works with the Canadian security deferral (tracks the deemed disposition, not the payment); pairs with the loss election for symmetric losses; leaves a mismatch on an unwind; and for US citizens, converts a future double tax into a current single tax with a working credit.

The departure-basis election package

For each T1161 property with an accrued gain: description, Canadian fair market value at departure (the valuation Canada used), historical cost, the deemed-disposition date. Form 8833 for the first US return: treaty article, Code provision affected, the election statement listing the properties and values. The basis ledger: each property's US basis reset to the departure value, with the Canadian valuation attached, kept until the property is sold. Confirmation that the election is consistent with the Canadian departure return (the same values). An hour on the first US return that prevents a double tax years later whose size nobody will remember to compute.

Worked example

A Toronto executive moves to Charlotte holding a C$1.8 million portfolio with a C$700,000 historical cost and shares of a private company valued at C$2 million against a C$300,000 cost. Canada: departure tax on C$2.8 million of accrued gains (with the security deferral elected on the private shares). US: without the election, her US basis would be C$1 million (converted) across both holdings; a sale of the portfolio two years later at C$2 million would produce a US gain of C$1.3 million — of which C$1.1 million is the pre-departure gain Canada already taxed. With the election: on her first US return (a dual-status year), Form 8833 elects Article XIII(7) treatment for both holdings; the US basis resets to C$1.8 million and C$2 million respectively (converted at the departure date); the portfolio's sale two years later produces a US gain of C$200,000 — post-departure appreciation only — taxed at long-term rates; the private shares, sold five years later at C$2.6 million, produce a US gain of C$600,000 rather than C$2.3 million. Her basis ledger, opened on the first US return, is the document her US preparer works from in both sale years. Her colleague, moving the same year without the election, sold his portfolio in year two and faced US tax on the full gain from historical cost — his preparer attempted a timing-mismatch foreign tax credit for the Canadian departure tax, which the Form 1116 limitation computation largely rejected because the Canadian tax fell in a year with no US gain; he paid roughly US$180,000 of US tax on gains Canada had already taxed, and the election that would have prevented it was a page on a return he had already filed.

Official sources

"Where at any time an individual is treated for the purposes of taxation by a Contracting State as having alienated a property and is taxed in that State by reason thereof, the individual may elect to be treated for the purposes of taxation in the other Contracting State, in the year that includes that time and all subsequent years, as if the individual had, immediately before that time, sold and repurchased the property for an amount equal to its fair market value at that time." — Canada-United States Tax Convention, Article XIII(7), https://www.canada.ca/en/department-finance/programs/tax-policy/tax-treaties/country/united-states-america-convention-consolidated-1980-1983-1984-1995-1997-2007.html

"When you leave Canada, you are considered to have sold certain types of property (even if you have not sold them) at their fair market value (FMV) and to have immediately reacquired them for the same amount. This is called a deemed disposition and you may have to report a capital gain (known as departure tax)." — Canada Revenue Agency, Leaving Canada (emigrants), https://www.canada.ca/en/revenue-agency/services/tax/international-non-residents/individuals-leaving-entering-canada-non-residents/leaving-canada-emigrants.html

Practitioner note

The Article XIII(7) election is the single most valuable page on an emigrant's first US return, and it is missed constantly because the double tax it prevents arrives years later on a sale nobody connects to the move. Our departure package makes the election for every T1161 property with a gain, disclosed on Form 8833 with Canada's valuations, and opens the basis ledger the eventual sale will be computed from — because the alternative, a timing-mismatch credit argument in the sale year, is a fight we would rather never have.

See also: For the re-entry checklist for returning to Canada, see the re-entry checklist for returning to Canada; and browse every cross-border tax topic guide, organized by situation.

Next step

Fairlight prepares the departure-basis election engagement — T1161 property inventory with Canadian valuations, the Form 8833 treaty position on the first US return, the US basis ledger, and coordination with the Canadian security deferral and any later loss or unwind elections. See cross-border pricing or book a call.