TFSA US Tax Treatment: Why US Citizens Should Think Twice

Canada’s Tax-Free Savings Account is one of the most popular savings vehicles for Canadian residents — contributions grow tax-free and withdrawals are never taxed. For US citizens living in Canada, however, the TFSA creates a significant US tax problem that many people do not discover until they file their first cross-border return.

Why TFSAs are not US-tax-deferred

The IRS does not recognize the TFSA as a tax-deferred savings plan. The Canada-US Tax Treaty (Article XXI) grants treaty benefits for certain Canadian registered plans — explicitly naming RRSPs and RRIFs — but does not include the TFSA. The TFSA was introduced in 2009, after the treaty’s most recent protocol, and has never been added to the treaty’s list of recognized pension or retirement plans.

The practical consequence: every dollar of income earned inside your TFSA — dividends, interest, capital gains — is taxable on your US 1040 return in the year it is earned. The Canadian tax exemption does not flow through to the US. If your TFSA holds a diversified portfolio generating $5,000 of dividends and $3,000 of capital gains in a year, all $8,000 flows into your US taxable income, even though you will never pay Canadian tax on it.

There is no treaty election mechanism for the TFSA comparable to the RRSP deferral election. The tax treatment is fixed: annual US taxation of all income and gains as they arise.

What you report on the 1040

Annual income inclusion. Dividends, interest, and capital gains distributions from TFSA holdings are reported as ordinary income or capital gains on your 1040, depending on their character. Canadian mutual fund distributions may require special treatment if the fund is considered a Passive Foreign Investment Company (PFIC) under US law — a common and complex issue with Canadian ETFs and mutual funds.

PFIC reporting. Most Canadian mutual funds, ETFs, and even some money market funds are PFICs. Holding a PFIC inside a TFSA does not insulate you from PFIC rules. You may need to file Form 8621 for each PFIC holding inside the TFSA. The excess distribution method (the default) taxes the gain at ordinary income rates with an interest charge; the mark-to-market election and qualified electing fund (QEF) election are alternatives that require annual reporting but avoid the interest-charge regime.

FBAR reporting. The TFSA is a foreign financial account for FBAR purposes. It counts toward the $10,000 aggregate threshold triggering FinCEN 114. See the separate FBAR and Form 8938 guide for thresholds and mechanics.

Form 8938. If your TFSA balance plus other foreign financial accounts exceeds $200,000 at year-end (or $300,000 at any point during the year, for overseas-based US citizens), the TFSA must be reported on Form 8938 as well.

Form 3520 / Form 3520-A debate

A more contentious question is whether TFSAs should be reported on Form 3520 (Annual Return to Report Transactions With Foreign Trusts) and Form 3520-A (Annual Information Return of Foreign Trust With a U.S. Owner).

The CRA structure of a TFSA is a trust arrangement, which some practitioners argue brings it within the Form 3520/3520-A foreign trust reporting regime. The IRS has not issued definitive guidance. The practical risk: penalties for not filing Form 3520 are steep — the greater of $10,000 or 35% of the trust’s gross value. Penalties for Form 3520-A non-filing are similar.

As of early 2026, the IRS has issued some interim guidance suspending certain penalties for TFSA (and FHSA) treatment pending formal rulemaking. However, the underlying reporting obligation and potential for future liability remain live issues. Many cross-border practitioners advise treating the TFSA as a foreign grantor trust and filing 3520/3520-A to avoid penalty exposure, even if no additional tax is owed.

RRSP as the better alternative for US citizens

For US citizens who want tax-advantaged savings in Canada, the RRSP is the preferable vehicle because it is explicitly covered by the Canada-US Tax Treaty.

Treaty deferral. Article XXI of the treaty allows a US citizen to elect to defer US taxation of RRSP income until distributions are made — matching the Canadian treatment. The election was historically made on IRS Form 8891 (discontinued), and is now made by attaching a statement to the 1040 in the year the RRSP is established. Once made, the election applies to all future years.

Deduction. RRSP contributions may also be deductible on the US return under treaty rules, subject to the individual’s earned income in Canada and the RRSP contribution room ceiling (18% of prior-year earned income, plus unused room carried forward).

Practical trade-off. RRSP contributions reduce current taxable income now; withdrawals are taxed as ordinary income later — both in Canada and (after the treaty deferral ends on distribution) in the US. For US citizens who expect to retire in Canada and be in a lower bracket, RRSP is generally the right call. TFSA contributions make mathematical sense only if the Canadian tax savings outweigh the US annual tax drag, which is rarely the case for significant balances.

The TFSA for FHSA comparison. The FHSA (First Home Savings Account) is similarly absent from the treaty. US citizens should approach FHSA contributions with the same caution applied to the TFSA — potential annual 1040 inclusion plus unresolved Form 3520 exposure.

For a comprehensive estimate of your annual US and Canadian tax obligations as a US citizen in Canada, use our calculator below.

US Citizens in Canada Tax Calculator