PFICs explained: why US expats must avoid foreign mutual funds and ETFs

One of the most expensive mistakes an American abroad can make is buying a local mutual fund or ETF. To the IRS almost every non-US pooled fund is a PFIC (Passive Foreign Investment Company), and the default tax treatment is brutal by design. Here is what a PFIC is, why it is punitive, and the simple fix.

The short version

What: a PFIC is basically any non-US pooled investment — foreign mutual funds, most non-US (UCITS) ETFs, many foreign money-market funds, and some foreign pension/insurance wrappers.
Why it hurts: the default Section 1291 method taxes gains and distributions at the highest ordinary rate, plus an interest charge for "deferral."
Paperwork: a separate Form 8621 per fund, per year — and the better QEF/mark-to-market elections need data foreign funds usually will not give you.
The fix: hold US-domiciled ETFs/funds in a US or expat-friendly brokerage, and avoid foreign-domiciled funds entirely.

By The Expat Money Hub editorial team June 3, 2026

Informational only — not financial, tax, or legal advice. Cross-border tax is fact-specific; confirm with a qualified cross-border CPA or adviser before acting. Some links are affiliate links — we may earn a commission at no extra cost to you. Full disclaimer.

PFIC rules

What to avoid vs. what's fine

Avoid — these are PFICs

Non-US mutual funds & ETFs (UK, EU UCITS, Canadian, etc.)
Funds inside an ISA, TFSA, assurance-vie or similar wrapper
Foreign robo-advisors and local "investment accounts"

Prefer

US-domiciled ETFs & mutual funds
Held in a US or expat-friendly brokerage
Individual stocks and bonds

Verify a specific fund with a cross-border professional — general guidance, not tax advice.

What counts as a PFIC?

Technically, a foreign corporation is a PFIC if it meets either an income test (75%+ of its gross income is passive) or an asset test (50%+ of its assets produce, or are held to produce, passive income). A pooled investment fund exists to earn passive income on a pile of assets, so it trips both tests almost by definition. In plain terms, a PFIC is nearly any non-US fund:

Foreign mutual funds — a UK OEIC, a French SICAV, a Canadian mutual fund.
Most non-US ETFs — an Irish- or Luxembourg-domiciled UCITS ETF is a PFIC even if it holds US stocks. Domicile of the fund is what matters, not what it holds.
Many foreign money-market funds and some foreign-domiciled bond funds.
Some foreign pension and insurance wrappers — funds held inside an investment "wrapper" can be PFICs in their own right.

The flip side is the good news: a US-domiciled ETF or mutual fund is a US corporation, not a foreign one, so it is not a PFIC — even when it holds entirely European or Asian stocks. That single distinction is the whole fix.

Why PFIC tax is so punitive (Section 1291)

If you do nothing special, a PFIC falls under the default Section 1291 "excess distribution" method, and it is deliberately harsh. When you sell the fund or receive an "excess distribution," the gain is spread back across every year you held it and taxed at the highest ordinary income rate in force for each of those years — not the lower long-term capital-gains rate a comparable US fund would get. Then an interest charge is added on top, as if you had owed that tax all along and deferred it.

The longer you have held the fund, the worse it gets, because the interest compounds over the holding period. On a position held many years, the combined tax and interest charge can consume a very large share of the gain. The point of the regime is to remove any benefit from holding offshore funds — and it succeeds.

The "better" elections — and their catch

There are two elections that can beat the Section 1291 default, but each comes with a problem that makes it hard to use in practice:

Method	How it taxes you	The catch
Section 1291 (default)	Highest ordinary rate + interest charge	The punitive one you land in by doing nothing
QEF (Section 1295)	Annual share of fund income, taxed more normally	Needs a PFIC info statement most foreign funds will not provide; best made in year one
Mark-to-market (Section 1296)	Annual gain/loss as ordinary income; no interest charge	Only for funds on a qualified exchange; taxes unrealized gains each year

The QEF election is usually the best outcome, but it depends on the fund handing you an annual PFIC information statement — and most non-US fund managers have never heard of the concept and will not produce one. Mark-to-market avoids the interest charge but only works for exchange-traded PFICs and makes you pay tax on paper gains every year. Either election generally needs to be in place from the first year you hold the fund to give its full benefit. Verify the current rules and statements on IRS.gov before relying on an election.

Form 8621: per fund, per year

On top of the tax, there is the filing. You generally file a separate Form 8621 (Information Return by a Shareholder of a Passive Foreign Investment Company or Qualified Electing Fund) for each PFIC, each year. Hold three funds and two non-US ETFs inside one foreign brokerage account, and that is five Forms 8621 every tax year, each with its own calculations. It is one of the most complex forms in the US system, and it is why a return with PFICs in it costs far more to prepare than one without.

How expats stumble into PFICs

Almost nobody buys a PFIC on purpose. People walk into them because the local option looks completely normal — and is genuinely tax-efficient in the country they live in. The trap is that the IRS does not care about the local wrapper:

A local bank or "wealth adviser" steers you into an investment account stocked with home-country mutual funds.
You open a UK ISA — tax-free to HMRC, but the funds inside are usually PFICs to the IRS.
You buy a French assurance-vie — a beloved local wrapper that is a PFIC minefield for US persons.
You fund a Canadian TFSA and hold Canadian mutual funds/ETFs inside it.
You take out a German Riester/Rürup or other insurance-based savings product full of EU-domiciled funds.

Every one of those is tax-free or tax-favored locally — and a PFIC headache to the IRS. This is exactly the kind of thing the country guides flag as a "gotcha," and it is worth reading the gotcha for wherever you live before you invest a euro.

Where this gets people

"It holds US stocks, so it's fine." No — a non-US ETF full of US stocks is still a PFIC. Domicile of the fund decides it.
"It's tax-free here." Tax-free locally (ISA, assurance-vie, TFSA) does not mean tax-free to the IRS — these are PFIC wrappers.
Selling can trigger the tax. Disposing of a PFIC is itself a taxable event under Section 1291, so do not unwind blindly.
Missing year-one elections. The QEF benefit largely depends on electing in the first year you hold the fund.
One account, many forms. Each fund is its own Form 8621 — the paperwork multiplies with every position.

The fix: hold US-domiciled funds

The clean way to sidestep PFICs entirely is to keep your investing in US-domiciled ETFs and funds through a brokerage that works with non-US residents. Interactive Brokers is the default expat-friendly broker for exactly this — it supports clients living abroad when many US brokers will not.

Hold US-domiciled funds with Interactive Brokers →

FAQ

Is a non-US ETF really a PFIC?

Almost always, yes. A pooled fund organized outside the US — a UK OEIC, an Irish or Luxembourg UCITS ETF, a Canadian mutual fund — is a foreign corporation that lives off passive income, which is exactly what the PFIC rules target. It does not matter that the fund holds US stocks: what matters is where the fund itself is domiciled. A US-domiciled ETF is not a foreign corporation, so it is not a PFIC. Verify a specific fund with a cross-border pro.

Why is PFIC tax so much worse than normal investment tax?

Under the default Section 1291 method, your gains and "excess distributions" are taxed at the highest ordinary income rate for each year you held the fund — not the lower long-term capital-gains rate — and then an interest charge is layered on top for the "deferral." On a fund held many years, the combined tax and interest can swallow a large share of the gain. It is designed to be punitive enough that you simply do not hold these funds.

Can the QEF or mark-to-market election fix it?

They can soften it, but each has a catch. A Qualified Electing Fund (QEF) election needs an annual PFIC information statement that most foreign fund managers have never heard of and will not provide. Mark-to-market only works for funds traded on a qualified exchange and taxes unrealized gains every year as ordinary income. And the QEF election generally has to be made in your FIRST year holding the fund to get its full benefit. Confirm current rules on IRS.gov.

How much paperwork is Form 8621?

A lot. You generally file a separate Form 8621 for EACH PFIC you hold, EACH year. Five foreign funds in one brokerage account means five Forms 8621 annually, each with its own calculations. The form is one of the more complex in the US system, which is why professional prep costs climb fast once PFICs are involved.

I already hold foreign funds — what now?

Do not panic-sell without advice, because selling can itself trigger the Section 1291 tax. Map out what you hold, get a cross-border CPA to model the cost of keeping versus unwinding each position, and route new money into US-domiciled funds going forward. The goal is to stop the problem growing while you clean up the existing holdings deliberately.

Keep reading

How to keep a US brokerage account abroad — where to actually hold those US-domiciled funds.
FBAR & FATCA explained — reporting the accounts those funds live in.
Money guide: Americans in the UK — the ISA gotcha in context (and the other country guides).
Transfer cost comparison tool.

Published 2026-06-03. General information, not tax or legal advice — confirm current PFIC rules, Form 8621 instructions, and election requirements on IRS.gov and with a qualified cross-border professional before acting.