TFSA, RESP, and ISA: The 'Tax-Free' Accounts That Aren't for Americans

A US citizen living in Toronto opens a TFSA, contributes CA$7,000, and watches it grow tax-free, at least as far as the Canada Revenue Agency is concerned. The IRS sees something entirely different: taxable investment income every year, quite possibly a foreign trust with its own reporting regime, and a stack of forms whose late-filing penalties start at $10,000 each. The word "tax-free" on the account brochure describes one country's law. If you hold a US passport or a green card, it does not describe yours.

This is one of the most expensive misunderstandings I see in expat and dual-citizen returns. The accounts are marketed (accurately, locally) as tax-advantaged. But US citizens are taxed on worldwide income regardless of residence under §1 and §61, and no foreign government's tax-exempt label binds the IRS. A savings vehicle that is genuinely tax-free in Ottawa, London, or elsewhere can be a compliance minefield in Washington.

Is a Canadian TFSA taxable in the US?

Yes. A Tax-Free Savings Account is taxable to a US person on the income it earns each year, because the US does not recognize its tax-exempt status.

The Canada-US tax treaty covers Canadian registered retirement accounts: an RRSP or RRIF gets deferral under Article XVIII, and you no longer need to file a separate election to claim it. But the TFSA is not a pension. It is not named in the treaty's pension provisions, so there is no treaty shield. The result:

• Interest, dividends, and capital gains inside the TFSA are reported on your Form 1040 in the year earned, the same as an ordinary taxable brokerage account.
• Because the account grew "tax-free" in Canada, there is little to no Canadian tax to claim as a foreign tax credit against the US liability. You get the income with none of the offsetting credit, the worst of both systems.

Many practitioners also treat a TFSA as a foreign trust, triggering Form 3520 (transactions with foreign trusts) and Form 3520-A (the trust's own return). Whether a given TFSA is a trust depends on how the specific institution structured it, and there is genuine disagreement in the field. What is not in dispute is the penalty exposure if it is a trust and you skip the forms; see below.

Does an RESP trigger Form 3520?

Usually, yes. A Canadian Registered Education Savings Plan is generally treated as a foreign trust for US purposes, which pulls it into the Form 3520 and Form 3520-A regime.

The RESP compounds the TFSA problem. On top of the annual income being taxable to the US contributor:

• The Canada Education Savings Grant, the government match Canada pays into the RESP, is arguably taxable income to the US person when contributed, since it is not a gift recognized as tax-free under US law.
• As a foreign trust, the RESP generally requires Form 3520-A (due the 15th day of the third month after the trust's year-end, so March 15 for a calendar-year trust) and Form 3520 (filed separately from your 1040 with the Ogden campus, but due at the same time, including extensions).

Under §6048 and the penalty provisions of §6677, failure to file these forms carries a penalty of the greater of $10,000 or 35% of the reportable amount for Form 3520, with additional penalties for a missing 3520-A. These are the penalties the IRS has historically assessed automatically on late-filed forms. A note on a case people sometimes cite for hope: Farhy v. Commissioner (T.C. 2023, reversed by the D.C. Circuit in 2024) concerned the IRS's authority to assess §6038(b) penalties for unfiled Forms 5471. It never applied to the §6677 foreign-trust penalties, which are explicitly assessable under Chapter 68 and were unaffected by the litigation. Treat the filing obligation as real.

Is a UK ISA tax-free for US citizens?

No. A UK Individual Savings Account is tax-free in the UK but fully taxable in the US, and the type of ISA determines just how bad the US treatment gets.

The UK-US treaty, like the Canadian one, protects recognized pension arrangements, not the ISA. So:

• A cash ISA produces interest that is US-taxable each year. Straightforward, if annoying.
• A stocks and shares ISA is where it turns punitive. If it holds UK-domiciled funds (OEICs, unit trusts, most UK ETFs), those are almost always passive foreign investment companies (PFICs) under §1297.

PFICs are the reason I tell US-citizen clients in the UK to think hard before opening a stocks and shares ISA. Under the default §1291 regime, gains and "excess distributions" are taxed at the highest ordinary rate for the year, with an interest charge tacked on for the deferral, and each PFIC requires its own Form 8621. A Qualified Electing Fund or mark-to-market election can soften this, but a QEF requires information the UK fund often will not provide.

What is the annual reporting burden across these accounts?

Beyond income tax, US persons with foreign accounts face two overlapping information-reporting regimes with their own thresholds and penalties.

Form	What triggers it	Threshold	Late penalty
FinCEN Form 114 (FBAR)	Foreign financial accounts	Aggregate > $10,000 at any point in the year	Up to $10,000+ non-willful, per year (inflation-adjusted)
Form 8938 (FATCA)	Specified foreign financial assets	Varies by filing status and residence	$10,000, rising to $50,000 for continued failure
Form 3520 / 3520-A	Foreign trust (RESP, possibly TFSA)	Any interest in a foreign trust	Greater of $10,000 or 35% under §6677
Form 8621	PFIC (most non-US funds)	Generally any PFIC holding	No standalone penalty, but keeps the statute of limitations open under §6501(c)(8)

A TFSA, RESP, or ISA will typically show up on the FBAR and Form 8938 regardless of the trust question. That last row matters: an unfiled Form 8621 can leave your entire return open to IRS examination indefinitely.

How do US citizens abroad clean this up?

The most common path is the Streamlined Foreign Offshore Procedures, which waive the 3520/8938/FBAR penalties for taxpayers whose failure to file was non-willful.

The pattern is almost always the same: a dual citizen or long-term green-card holder opened these accounts on the advice of a perfectly competent local bank, with no idea the US cared. Options to consider, with your advisor:

1. Streamlined Foreign Offshore Procedures. Requires certifying non-willful conduct, filing three years of amended returns and six years of FBARs, and paying tax due plus interest. In exchange, it abates the information-return penalties. Facts drive eligibility.
2. Reasonable-cause abatement. For a missed Form 3520/3520-A, a reasonable-cause statement under the §6677 standard can defeat the penalty, though the IRS has been aggressive here.
3. Prospective planning. Some US citizens choose to hold new savings in a US brokerage account or a treaty-recognized pension instead, avoiding the PFIC and trust machinery entirely.

None of this is one-size-fits-all. The trust characterization of a TFSA, PFIC elections, and streamlined eligibility all turn on your specific facts and jurisdiction. Coordinate with a cross-border advisor before filing or making an election, and consult your attorney where the willfulness question is genuinely in play.

Sources

• IRC §1 and §61: worldwide taxation of income for US persons
• IRC §1291, §1297, and §1298: passive foreign investment company rules
• IRC §6048 and §6677: foreign trust reporting and penalties
• IRC §6501(c)(8): statute of limitations held open for unfiled international information returns
• Canada-US Income Tax Treaty, Article XVIII (pensions)
• UK-US Income Tax Treaty (pension provisions)
• Form 3520 and Form 3520-A, and instructions
• Form 8621 (PFIC reporting), and instructions
• Form 8938 (FATCA), and instructions
• FinCEN Form 114 (FBAR)
• IRS Streamlined Foreign Offshore Procedures guidance
• Farhy v. Commissioner, 160 T.C. No. 6 (2023) (§6038(b) penalties), reversed by the D.C. Circuit (2024)