Walk into any Canadian bank and the products on the wall advertise their tax treatment right in the name. Tax-Free Savings Account. Registered Retirement Savings Plan. The label is the selling point.
Here’s the mistake: assuming that label travels with you into your US tax return.
It doesn’t. “Tax-free” is a promise made by Canadian law to Canadian taxpayers. The United States taxes its citizens and green card holders on worldwide income under its own rules — and US law has never heard of your bank’s marketing department. When a US person holds a Canadian registered account, the US asks exactly one question: does the US-Canada tax treaty, or US law itself, recognize this account? If the answer is no, the account is just another foreign investment account as far as the IRS is concerned — whatever the sticker on it says.
The two accounts that prove the point
The RRSP and the TFSA sit side by side at the same bank, both wearing tax-advantaged labels. Under US rules, they live in different worlds.
The RRSP is the exception. The US-Canada treaty specifically recognizes Canadian retirement plans, and under current IRS procedure, eligible US persons get tax deferral on RRSP earnings automatically — no special election form, no annual paperwork to claim it. The growth inside the plan isn’t taxed by the US until you take distributions, roughly mirroring the Canadian treatment. This is what treaty coverage looks like when it works. (It wasn’t always this clean — the automatic treatment is a relatively recent simplification, and the deferral is only the income-tax side; disclosure obligations are a separate question, covered below.)
The TFSA is the rule. The treaty does not cover it. There is no US provision that recognizes a TFSA as anything special. So the “tax-free” growth your bank advertises is fully taxable on your US return, year by year, as it’s earned — interest, dividends, capital gains, all of it. And depending on how the TFSA is structured and what it holds, it can pull additional US reporting obligations along with it. Which obligations depends on the specifics of the account — which is exactly why this is a “talk to a cross-border professional” situation rather than a look-up-the-answer situation.
The TFSA Trap: Tax-Free in Canada, Taxable in the US goes deeper on the TFSA specifically.
The pattern, not just the products
The RRSP/TFSA contrast is the cleanest illustration, but the underlying mistake is broader, and it applies to every “registered” or “tax-advantaged” account Canada has introduced — including the newer ones. The error sequence is always the same:
- A bank or government labels an account “tax-free” or “tax-deferred.”
- The account holder reasonably assumes that’s the whole story.
- Nobody asks whether US law agrees.
- Years of US-taxable income quietly accumulates, unreported.
The fix is a single habit: before assuming any Canadian account’s tax treatment carries over, ask whether the treaty or US law specifically recognizes that account type. For most registered accounts other than retirement plans, the honest answer is either “no” or “unsettled” — and unsettled is not the same as safe.
The treaty in general does less than most people assume — The US–Canada Tax Treaty: What It Protects You From — and What It Doesn’t covers what it actually does and doesn’t do, and Assuming the Treaty Works on Autopilot — What the US-Canada Tax Treaty Does and Doesn’t Do for You covers the broader version of this same mistake.
Don’t forget the disclosure layer
Everything above is about tax — what income the US counts. There’s a second, independent layer: disclosure — what accounts the US wants to know about. Registered accounts generally count toward foreign account reporting thresholds regardless of their tax treatment. An RRSP that owes no current US tax still has to show up in your disclosure filings. The tax answer and the reporting answer are separate questions, and getting the first one right doesn’t answer the second. The Second Filing System: US Disclosure Forms Most Expats Never Hear About walks through that system.
The takeaway
The label on the account is a Canadian fact. Your US treatment is a treaty fact. Those are different facts, and for most accounts other than the RRSP, they don’t match. If you’re a US person holding Canadian registered accounts and you’ve never had the US side of them reviewed, that review is worth doing before the IRS does it for you.
This article is general educational information, not tax advice. Cross-border situations turn on individual facts. Before acting on anything here, speak with a qualified cross-border tax professional about your specific circumstances.