US Expats and PFIC Rules: The Investment Trap Most Don't Know About

For most international investors, buying a diversified global fund through a non-US brokerage account is a straightforward investment decision. For US citizens and green card holders living abroad, the same transaction can trigger the most hostile tax treatment in the US Internal Revenue Code: the Passive Foreign Investment Company (PFIC) rules.

The PFIC regime was designed in the 1980s to prevent US persons from using offshore holding companies to defer or avoid US tax on investment income. In practice, it has created a minefield for US expats who simply want to invest like their non-US neighbours — in local pension schemes, ISAs, ETFs listed in London, and unit trusts managed in Dublin or Luxembourg.

What Is a PFIC?

A Passive Foreign Investment Company is, broadly, any non-US corporation that meets either of these tests:

• Income test: 75 per cent or more of the corporation's gross income is passive income (dividends, interest, rents, royalties, gains)
• Asset test: 50 per cent or more of the corporation's average assets are assets that produce (or could produce) passive income

Any non-US investment fund — UK unit trusts, Irish UCITS funds, Luxembourg SICAVs, ETFs listed on the London Stock Exchange, Canadian mutual funds — will almost certainly qualify as a PFIC. Even a single share in a non-US company that itself holds significant passive assets may be a PFIC.

The Default Tax Treatment: Brutal

If a US person holds PFIC shares and receives distributions or disposes of the shares, the default tax treatment (absent elections described below) is:

1. Any gain on disposal (or "excess distribution" — distributions exceeding 125 per cent of the average distribution in the prior three years) is allocated ratably across the years the shares were held
2. The allocated gain for each prior year is taxed at the highest ordinary income rate applicable to that year (currently up to 37 per cent)
3. An interest charge is added to the tax for each prior year, compounding the burden

The combination of ordinary income rates (not the preferential capital gains rate) and the interest charges makes the default PFIC treatment extraordinarily punitive. On a position held for 10 years with significant appreciation, the effective tax rate including interest can approach or exceed 60 per cent of the gain.

Available Elections to Mitigate PFIC Consequences

The US tax system provides two elections that can avoid the worst consequences:

QEF Election (Qualified Electing Fund)

A Qualified Electing Fund election requires the PFIC to provide the US shareholder with a "PFIC Annual Information Statement" showing the fund's ordinary earnings and net capital gain for the year. The US shareholder includes their pro-rata share of the fund's income in their US taxable income each year — taxed at ordinary and capital gains rates respectively.

The key benefit: gains are taxed annually as they accrue (at potentially favourable capital gains rates), rather than being subject to the default interest-charge regime on eventual disposal. The fund effectively becomes transparent for US tax purposes.

The problem: the vast majority of non-US investment funds do not provide PFIC Annual Information Statements because they have no obligation to do so and no commercial incentive. Without the QEF statement from the fund, the QEF election cannot be made.

Mark-to-Market Election

A mark-to-market (MTM) election is available if the PFIC shares are "regularly traded on a qualified exchange." Under MTM, the US shareholder:

• Includes unrealised gains at year-end in ordinary income
• Deducts unrealised losses (up to previously recognised MTM gains)
• On disposal, any further gain or loss is treated as ordinary income/loss

MTM converts appreciation in the fund into ordinary income annually, avoiding the interest-charge regime. However, it requires the fund to be regularly traded on a qualified exchange (US exchanges or designated foreign exchanges) and treats all gains as ordinary income — the preferential capital gains rate does not apply to MTM PFIC gains.

Practical Implications for US Expats

The PFIC regime creates significant practical difficulties for US persons living outside the United States:

UK-listed ETFs and funds: almost all UK-domiciled ETFs and unit trusts are PFICs. A US expat in the UK who buys a FTSE All-World ETF on the London Stock Exchange is almost certainly buying a PFIC with no QEF election available.

ISAs: the Individual Savings Account is a popular UK savings vehicle, but it provides no US tax shelter. Dividends and gains within an ISA are still reportable to the US and, if the ISA holds UK-domiciled funds, the PFIC rules apply. The ISA tax shelter is purely a UK benefit.

QROPS incompatibility: Qualifying Recognised Overseas Pension Schemes, commonly used by non-US expatriates to move UK pensions offshore, are generally incompatible with US tax obligations because the QROPS itself (and underlying investments) can create PFIC and FBAR reporting issues.

Practical solution — US-domiciled investments: the cleanest solution for US persons abroad is to invest through US-domiciled vehicles (US-listed ETFs, US mutual funds, a US brokerage account) which are not PFICs. These provide no PFIC exposure, remain within the familiar US tax framework, and the wide range of low-cost Vanguard, iShares, and Fidelity ETFs listed in the US provides adequate diversification.

The trade-off: UK-registered investment platforms and financial advisers may not be willing or able to advise on or hold US-listed securities, depending on their regulatory permissions.

FBAR and FATCA Reporting

PFIC reporting is one of several US-specific obligations that make investing abroad complex for US persons:

FBAR (FinCEN Form 114): all US persons with foreign financial accounts whose aggregate maximum value exceeds $10,000 at any point during the year must file an FBAR by April 15 (extended to October 15). Penalties for non-wilful FBAR violations can reach $10,000 per violation; wilful violations can be $100,000 or 50 per cent of the account value per year.

FATCA (Form 8938): US persons with foreign financial assets above reporting thresholds (which vary by filing status and residency) must also file Form 8938 with their tax return. Thresholds for US persons abroad are higher than for US-resident filers.

PFIC Annual Reports (Form 8621): required for each PFIC held where a QEF or MTM election is made, or where an excess distribution or gain is realised. Form 8621 is notoriously complex and time-consuming.

Working With the Right Advisers

US persons abroad need advisers who understand both US tax obligations and the investment landscape in their country of residence. This is a specialist area — standard UK wealth managers or financial planners rarely have US tax expertise, and US-based advisers may not understand the local investment environment.

In practice, US expats in the UK often work with a dual-qualified adviser (one who holds both UK (FCA) and US (SEC or FINRA) authorisation, or who works alongside a US CPA firm) to ensure their investment decisions are coherent with both their UK and US obligations.

Tax rules are complex and change. This article reflects the US tax position as of June 2026 and does not constitute tax advice. US persons should always consult a qualified US tax professional (CPA or enrolled agent) before making any investment decisions. Investments can fall as well as rise in value.

How Global Investments Can Help

Global Investments has significant experience advising US persons living outside the United States — including in the UK, UAE, and other key expat markets. We understand the PFIC, FBAR, and FATCA landscape and can help US expats build investment strategies that are coherent with their US obligations while meeting their wealth building goals.

We work alongside trusted US CPA firms to ensure investment recommendations account for US tax implications. Contact us to arrange a consultation if you are a US person investing outside the United States.