Topic · Switzerland
PFICs & Swiss Investments for U.S. Persons
Why Swiss and European funds are often PFICs, what Form 8621 means, and how to check your holdings before filing.
By Danilson Ramos · Founder, Atamatax
Published June 2026 · Updated November 2026
Part of the Switzerland desk — every US tax topic for Switzerland in one place.
Check it for your own holding
Could this investment be a PFIC?
Two questions and, if you have it, the ticker or ISIN. The read is immediate, nothing you enter leaves this page, and it names what would settle the rest.
Free, no account, nothing you answer leaves this page. Open the full portfolio scanner
Screened against the fund registry on this page. It is never sent anywhere.
A screen. Whether a fund is a PFIC turns on its own annual income and asset facts under §1297; the read above says how far your answers go and what would settle the rest.
One of the biggest surprises for Americans investing in Switzerland is the PFIC regime. A PFIC (passive foreign investment company) is, in practice, most non-U.S. pooled funds — and U.S. tax treats them unfavorably.
Why a Swiss or European ETF is usually a PFIC
PFIC status turns on the fund's structure and non-U.S. domicile, not on what it invests in. A Switzerland- or Ireland-domiciled ETF — even one tracking U.S. stocks — is generally a PFIC for a U.S. person who holds it.
Where your Swiss PFICs come from
- UCITS ETFs (Ireland/Luxembourg) bought because your broker blocked U.S.-domiciled ETFs.
- Swiss-domiciled funds (ISIN CH…).
- The funds inside an invested Pillar 3a (VIAC, finpension, Frankly).
- A fund-based vested-benefits account.
How many Forms 8621, and the de minimis exception
A separate Form 8621 is generally prepared for each PFIC with a reporting trigger in that year. A limited exception from the annual §1298(f) report may apply for a year with aggregate PFIC value of $25,000 or less on the last day of the year ($50,000 MFJ), subject to the full conditions in the current instructions; it does not cover an excess distribution, a gain on a disposition, or an election.
Without an election the default §1291 rules apply, and they can be punitive. A QEF or mark-to-market election changes the treatment, but each has its own requirements — QEF needs the fund's PFIC Annual Information Statement.
What to check
List every fund/ETF you hold, including inside an invested pillar 3a. The free Tax Risk Check flags whether a PFIC review is likely worthwhile for you.
Producing the forms
The default §1291 worksheet allocates an excess distribution or gain across the holding period and computes the prior-year tax and interest charge under the statutory method. Provider pricing varies by scope and data quality. Build the supported worksheet with the calculator, then review every Swiss holding with the checker.
Swiss withholding tax on Swiss funds
Distributions from a Swiss-domiciled fund (ISIN starting CH) carry the 35% Swiss withholding tax (Verrechnungssteuer). A Swiss resident normally gets it back through the cantonal tax return. A tax you are entitled to have refunded is not a creditable foreign tax, so only the part you finally bear can go on Form 1116 — see the foreign tax credit.
Find and draft your Swiss Forms 8621
Check which Swiss holdings are PFICs, then build the §1291 worksheet. This is general information, not individualised tax advice.
From one fund to the whole case
What does your PFIC situation actually require?
Four questions — how many funds, for how long, whether Forms 8621 were ever filed, whether the returns are current — and a route into the preparation that fits, with what it costs. Nothing you answer leaves this page.
Free, no account, nothing you answer leaves this page. Open the full portfolio scanner
A routing read, not a determination. Whether a fund is a PFIC, whether an exception applies and what a prior year needs are established when the holdings are screened; the route above says where that happens and what it costs.
Authorities cited
- IRC §1297 — IRC §1297 — Definition of a passive foreign investment company
- IRS Form 8621 — About Form 8621 — Information Return by a Shareholder of a PFIC or QEF
- IRC §1291 — IRC §1291 — Interest on tax deferral (excess-distribution regime)
- IRC §1295 — IRC §1295 — Qualified Electing Fund (QEF) election
- IRC §1296 — IRC §1296 — Mark-to-market election for marketable PFIC stock
Primary sources (Cornell Legal Information Institute for the US Code and CFR; IRS.gov for forms, procedures, and treaty documents). This page is general information, not individualized tax or legal advice.
Atamatax provides tax preparation support and educational resources. This website does not constitute legal or tax advice.