Cross-Border Tax Traps for Canadians Buying U.S. Property

Buying a home in the United States as a Canadian employee transfer is primarily a mortgage question, but it is also a tax question that most people do not think about until it is too late. Canada and the United States each have full taxing authority over their residents, and the interaction between the two systems creates traps that can cost tens of thousands of dollars if not navigated properly.

This article is not tax advice, you need a cross-border tax accountant for that. What it is: a practical overview of the most common tax issues that arise when Canadian employees buy U.S. property, so you know the right questions to ask your tax professional before closing. As a broker licensed in both countries (NMLS #2613311 and Quebec licensed broker), I see these issues surface on nearly every cross-border file.

Residency Status: The Foundation of Everything

Your tax obligations depend entirely on your residency status, and Canada and the U.S. define residency differently. Canada uses a "significant residential ties" test: if you maintain a home, spouse, or dependents in Canada, you may remain a Canadian tax resident even while living in the U.S. The U.S. uses the "substantial presence test": if you are physically present in the U.S. for 183 or more days in the current year (or a weighted average over 3 years), you are a U.S. tax resident.

Many Canadian employee transfers become dual residents during their transition year, still maintaining ties to Canada (a spouse who has not yet moved, a property being sold, children finishing a school year) while meeting the substantial presence test in the U.S. Dual residency triggers filing obligations in both countries and requires the Canada-U.S. Tax Treaty tie-breaker rules (Article IV) to determine which country has primary taxing rights.

The Departure Tax: Canada's Exit Charge

When you cease to be a Canadian tax resident, CRA triggers a "deemed disposition" on most of your assets. This means you are treated as having sold everything at fair market value on the date you leave. Capital gains tax applies to any unrealized gains on stocks, mutual funds, investment properties, and certain other capital property.

Your Canadian principal residence is exempt, if the home you lived in before your transfer was your principal residence, the departure tax does not apply to it. However, if you own an investment property in Canada (a rental condo, a cottage that was not your principal residence), the unrealized gain on that property is taxable on departure.

The departure tax does not apply immediately in all cases. You can elect to defer the tax by posting security with CRA, but this adds complexity and cost. The key takeaway: before you leave Canada, get a cross-border tax accountant to calculate your deemed disposition exposure and plan accordingly.

FBAR: Reporting Your Canadian Accounts to the IRS

Once you become a U.S. tax resident (which happens quickly under the substantial presence test), you are required to report all foreign financial accounts to FinCEN if their aggregate value exceeds $10,000 USD at any point during the year. This is the FBAR filing (FinCEN Form 114), and it catches nearly every Canadian who keeps their RBC or TD checking account open after moving to the U.S.

FBAR applies to bank accounts, investment accounts, TFSAs, RRSPs, and any other financial account held outside the United States. The $10,000 threshold is aggregate, if your Canadian checking account holds $6,000 and your TFSA holds $5,000, you exceed the threshold and must file.

FBAR is filed electronically through FinCEN's BSA E-Filing system, separate from your tax return. The deadline is April 15 with an automatic extension to October 15. Penalties for non-filing are severe: up to $10,000 per non-willful violation per account per year, and up to $100,000 or 50% of the account balance (whichever is greater) for willful violations.

FATCA: The Additional Reporting Layer

In addition to FBAR, the Foreign Account Tax Compliance Act (FATCA) requires U.S. tax residents to report foreign financial assets on IRS Form 8938 if they exceed certain thresholds. For individual filers living in the U.S., the filing threshold is $50,000 at year-end or $75,000 at any point during the year. Married filing jointly thresholds are $100,000/$150,000 respectively. Higher thresholds apply for U.S. residents living abroad ($200,000/$300,000 single, $400,000/$600,000 joint). Confirm current thresholds with your cross-border CPA, as these figures can change.

FATCA Form 8938 is filed with your annual tax return, unlike FBAR which is separate. Many Canadian transfers need to file both FBAR and Form 8938, they are not duplicative, despite covering similar accounts.

TFSA: The U.S. Tax Problem No One Mentions

Canada's Tax-Free Savings Account is a wonderful tool for Canadian residents, but the U.S. does not recognize the TFSA as a tax-sheltered account. The IRS treats a TFSA as a foreign trust, which triggers complex reporting requirements (Forms 3520 and 3520-A) and means the investment income earned inside your TFSA is taxable on your U.S. return.

Many cross-border tax professionals recommend that Canadian employee transfers liquidate their TFSA before becoming U.S. tax residents (or shortly after) to avoid ongoing reporting burdens. The withdrawal from a TFSA is tax-free in Canada, and if you reinvest in a U.S. taxable account, you simplify your tax compliance significantly.

RRSP: Better Treatment, but Still Complications

Unlike the TFSA, the RRSP is recognized under the Canada-U.S. Tax Treaty (Article XVIII). You can elect to defer U.S. tax on RRSP income by making the appropriate election on your annual tax return (Form 8891 was eliminated in 2014; the treaty election is now reported directly on your 1040). This means your RRSP can continue to grow tax-deferred while you are a U.S. resident, but you must make the election, and you must still report the RRSP on your FBAR and potentially on Form 8938.

Contributing to your RRSP while a U.S. tax resident is more complex. U.S. tax law does not allow a deduction for RRSP contributions. If your Canadian employer continues to contribute to a group RRSP as part of your compensation, the contribution may be taxable as U.S. income. Discuss this with a cross-border tax accountant before your transfer.

FIRPTA: The Trap When You Sell and Go Home

FIRPTA does not affect you when buying a U.S. home. It affects you when selling. If you sell U.S. real property after becoming a non-resident of the United States (for example, you return to Canada after your assignment ends), FIRPTA requires the buyer to withhold 15% of the gross sale price and remit it to the IRS as prepaid tax.

On a $500,000 home, that is $75,000 withheld at closing. You can recover the excess (the difference between the withholding and your actual tax liability) by filing a U.S. tax return, but that takes 6 to 12 months. You can also apply for a withholding certificate (IRS Form 8288-B) before closing to reduce or eliminate the withholding, but this must be filed in advance and takes 3 to 4 months for IRS processing.

The lesson: if there is any possibility you will return to Canada and sell your U.S. home as a non-resident, plan for FIRPTA from the beginning. Your cross-border tax accountant should have this on your radar from day one.

Mortgage Interest Deduction: A U.S. Benefit

On the positive side, U.S. tax law allows you to deduct mortgage interest on your primary residence (up to $750,000 of mortgage debt for loans originated after December 15, 2017). This is a significant tax benefit that does not exist in Canada. For a $400,000 mortgage at 6.25%, the first-year interest is approximately $24,850, which, combined with property taxes, may push you above the standard deduction ($15,000 for single filers, $30,000 for married filing jointly in 2026) and generate meaningful tax savings.

However, this benefit only applies if you itemize deductions on your U.S. return. Many taxpayers, especially those without high state income taxes or other large deductions, find the standard deduction more valuable. Run the numbers with your tax accountant.