Dual Citizens and US Persons in Canada: Why the TFSA Is Taxable to the IRS and the RRSP Is Not Automatically Recognized

Summary

For taxpayers who hold US status — a US citizen, a green-card holder, or someone who meets the substantial-presence test — while living in Canada, one of the most overlooked and costly issues is that the two countries treat “tax-free” accounts very differently. The IRS does not recognize the Canadian TFSA as a tax-free account, so investment income inside a TFSA is generally taxable on the US side. The RRSP occupies a different position again: it is not automatically treated the same way by the US, and whether deferral applies depends on the Canada–US tax treaty and the taxpayer’s circumstances.

The practical consequence of this mismatch is that many dual-status taxpayers assume that because an account is tax-free in Canada, nothing more is required. In fact, the US side can carry its own reporting and tax obligations. Taxpayers above the relevant thresholds may also need to file an FBAR (Report of Foreign Bank and Financial Accounts) and Form 8938 (Statement of Specified Foreign Financial Assets); where funds move to or from Canadian entities or trusts, the Form 3520 obligation is also frequently underestimated. Penalties for missing these information returns are often computed by account or by amount rather than by tax owed, so they can be substantial even when no tax is due.

For cross-border Canada/US filers, the key is to treat “tax-free in Canada” and “tax-free in the US” as two separate questions. An account that is tax-free on one side is not necessarily tax-free on the other. Account type, residency status, and changes in either can all change the required filing set. Reviewing your account list and filing obligations with a licensed CPA before filing season is the practical way to avoid surprises.

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Our Take

In practice, the most common mistake dual-status taxpayers make is extrapolating a Canadian result into a US one. A TFSA grows tax-free in Canada, but the US does not recognize that status, and its income will often need to be reported on the US side; an RRSP requires a treaty-informed, facts-specific analysis of deferral. Meanwhile, information returns such as FBAR, Form 8938, and Form 3520 are not about whether tax is owed — failing to file them can trigger penalties on its own. Cross-border families are best served by maintaining an account-and-status inventory and reviewing the filing set year by year rather than relying on memory or prior-year habits.

Disclaimer: This article is general information only and does not constitute tax advice; it should not substitute professional tax counsel. Please consult a licensed CPA for advice specific to your situation.