7 cross-border tax traps Americans hit when buying Canadian real estate
A Toronto condo you buy for $600,000 and sell five years later for $900,000 costs you nothing in Canadian capital gains tax if it's your primary residence. The IRS still wants a cut on everything above $250,000 if you're single. That $400,000 gap means a U.S. tax bill north of $22,000 on a sale Canada considers tax-free.
Here's what actually catches Americans buying property north of the border, written for people closing in the next year.
1. The principal residence mismatch creates phantom tax bills.
Canada exempts your primary home from capital gains tax entirely. The U.S. caps the exemption at $250,000 for individuals, $500,000 for couples filing jointly. In Vancouver or Toronto, where a typical detached home runs $1.2 million to $2 million, that gap compounds fast. Sell after a decade of appreciation and you can owe the IRS six figures on a transaction the CRA considers clean.
2. You're filing an annual return even if you owe nothing.
The federal Underused Housing Tax requires non-resident owners to file Form UHT-2900 every year. The tax itself is 1% of the property's value, but most Americans living in the home or renting it out long-term are exempt. The filing is not. Miss it and the penalty starts at $10,000 per individual owner. The CRA does not send reminders.
3. Provincial buyer taxes hit upfront, not at closing.
Ontario's Non-Resident Speculation Tax is 25% of the purchase price as of 2025. British Columbia's is 20%. These are due on closing, paid to the province, separate from your down payment. On a $700,000 home in Ontario, that's $175,000 added to your cash-to-close. Rebates exist if you become a permanent resident or work in Canada on specific permits, but you pay first and apply for the rebate later. Budget as if you won't get it back.
4. The mortgage payoff can trigger U.S. taxable income if the dollar moves.
If the Canadian dollar strengthens between the day you take out a mortgage and the day you pay it off, the IRS treats the "savings" from paying back cheaper CAD debt with stronger CAD as taxable currency gain. Example: You borrow $500,000 CAD when the exchange rate is 1.35 (costing you roughly $370,000 USD equivalent). Five years later the rate is 1.25 and you pay off the mortgage. The IRS sees you discharging USD-equivalent debt for less than you "borrowed" in USD terms. That spread can be taxable, even if you never sold the house.
5. Rental income is withheld at 25% gross unless you file NR6 in advance.
If you rent the property, Canadian law requires the tenant or property manager to withhold 25% of the gross rent and remit it to the CRA. That's before expenses. Filing Form NR6 lets you pay tax on net rental income instead (typically 20% to 30% depending on your bracket), but the form must be filed before the tax year starts or within 30 days of your first rental income. File it late and you're stuck with gross withholding until the next calendar year.
6. The purchase ban blocks most transactions until 2027.
The Prohibition on the Purchase of Residential Property by Non-Canadians Act runs through January 1, 2027. Americans can still buy if the property is outside a Census Metropolitan Area (recreational properties in cottage country) or if they hold a valid work or study permit and meet residency requirements. Urban condos and single-family homes in Toronto, Vancouver, Montreal, Calgary, and Ottawa are off-limits unless you qualify for a narrow exemption.
7. FBAR reporting triggers at $10,000 across all foreign accounts combined.
A Canadian bank account, even one opened just to hold your down payment or pay your mortgage, counts toward the $10,000 threshold that requires filing FinCEN Form 114. The IRS counts the highest balance at any point during the year across all foreign accounts. Miss the filing and penalties start at $10,000 per year for non-willful violations. The form is separate from your 1040 and due separately.
The one that costs the most over time is #1. The one that catches the most people in year one is #2.
