Do Snowbirds Pay US Tax on Their Canadian Income? No — and Here Is Exactly Where the Line Sits

The fear behind this question — that wintering in the US invites the IRS into a Canadian retirement — has the tax law exactly backwards. A nonresident alien is taxed by the US only on US-source income, in two channels: income effectively connected with a US trade or business (taxed on a net basis at graduated rates, via a 1040-NR), and US-source passive income — dividends, certain interest, rents, royalties — taxed by flat withholding at 30% or the treaty rate, collected by the payer, usually final. Everything Canadian sits outside both channels. CPP, OAS, RRIF withdrawals, Canadian employer pensions, Canadian dividends and interest, the sale of the Kingston house, the Canadian portfolio's gains: none of it is US-source, and a snowbird who maintains nonresident status (Form 8840, or simply staying under the formula) reports none of it to the US, ever. Spending the money in Florida changes nothing — the US taxes income by source and status, not by where the groceries are bought. What the US does tax is the short list a snowbird's own choices create: rent from the Florida condo, US casino winnings, dividends on US stocks, interest from US private lending, and wages for any work actually performed on US soil. Even that list mostly runs on autopilot — W-8BENs set treaty withholding at the broker, the casino withholds at the cage — with a 1040-NR needed only where net-basis treatment is elected or a refund is being claimed. The two genuine hazards are status and work: lose nonresident status (the 183-day formula unclaimed) and worldwide taxation arrives by default; or work from the lanai — a Zoom job, consulting invoices, managing the rental business personally — and US-source earned income starts accruing where none needed to exist.

Key takeaways

• The rule: nonresidents are taxed on US-source income only. Canadian-source income of a Canadian-resident snowbird is invisible to the IRS — no reporting, no rates, no forms.
• US-source items a snowbird commonly has: US stock dividends (15% treaty withholding via W-8BEN — final); US rental income (30% on gross by default, or the net election with a 1040-NR); gambling winnings (30% at source, recoverable in part via the treaty's loss deduction); interest from US banks (generally exempt from withholding for nonresidents under the portfolio and bank-deposit rules — genuinely tax-free both ways until Canada taxes it as Canadian income).
• Canada still taxes everything: the snowbird remains a Canadian resident taxed on world income — including the Florida rent and the US dividends — with foreign tax credits for the US tax withheld. The US line moves nothing on the Canadian side.
• Work is the line-crosser: employment or self-employment services physically performed in the US create US-source earned income, whatever the employer's country — a real issue for the semi-retired consultant who works winters, softened but not erased by the treaty's short-stay employment rules.
• Status is the other: the sourcing shield belongs to nonresidents; meet the day-count formula without claiming the closer connection exception and the default flips to resident taxation of world income. The 8840 is what keeps this article true.
• Paperwork inventory for a clean snowbird year: W-8BENs current at every US payer, Form 8840 filed if the formula was met, a 1040-NR only if electing net rental treatment or reclaiming gambling withholding — and otherwise, nothing.

Where people talk themselves into trouble

The errors are almost always self-inflicted expansions of the US footprint: putting the Canadian portfolio into a US brokerage "since we're here anyway" (fine, but now the W-8BEN and estate-exposure questions apply to more assets); doing a little paid work each winter; or renting the condo casually with no withholding structure, which leaves the gross-basis default and an agent's liability hanging. None of these is fatal; each converts a no-filing life into a filing one.

Worked example

A retired Moncton couple spends 140 days a year in Fort Myers. Their income: C$70,000 of RRIF withdrawals, CPP and OAS, C$12,000 of Canadian dividends, US$4,000 of dividends from US stocks held at their Canadian broker, and US$9,000 of seasonal rent on their condo for the months they're home. US analysis: the RRIF, CPP, OAS, and Canadian dividends — invisible; the US dividends — 15% withheld under their W-8BENs, final; the condo rent — they file the net election with a 1040-NR, where expenses and depreciation reduce the taxable rent to nearly nothing; Form 8840 each June keeps their status nonresident (their weighted day count exceeds 183). Canadian analysis: everything, including the condo rent and US dividends, on the T1 as always, with the small US taxes credited. Total US exposure to their Canadian retirement income: zero — which is what it was before they ever went south, and what it stays as long as the 8840 gets filed and nobody starts invoicing clients from the pool deck.

Official sources

"FDAP income is taxed at a flat 30 percent (or lower treaty rate, if qualify) and no deductions are allowed against such income. ... Effectively Connected Income, after allowable deductions, is taxed at graduated rates." — Internal Revenue Service, Taxation of Nonresident Aliens, https://www.irs.gov/individuals/international-taxpayers/taxation-of-nonresident-aliens

"You will be considered a United States resident for tax purposes if you meet the substantial presence test for the calendar year. To meet this test, you must be physically present in the United States (U.S.) on at least: 31 days during the current year, and 183 days during the 3-year period that includes the current year and the 2 years immediately before that." — Internal Revenue Service, Substantial Presence Test, https://www.irs.gov/individuals/international-taxpayers/substantial-presence-test

Practitioner note

This is the reassurance meeting of snowbird practice, and the honest version has one caveat per direction: the US can't see Canadian income as long as status is minded, and Canada never stopped seeing the US income snowbirds think of as 'American money.' The checklist we leave clients with is short — 8840, W-8BENs, a rental election if there's rent, and no working vacations — because the sourcing rules do the rest by themselves.

See also: Browse every cross-border tax topic guide, organized by situation.

Next step

Fairlight prepares the snowbird US exposure review — status protection, W-8BEN and withholding setup, the rental net election where needed, and the Canadian-side credit reporting. See cross-border pricing or book a call.