Form 8621 · Switzerland
Form 8621 for PFICs in Switzerland
Why Americans in Switzerland end up with multiple Forms 8621 — from UCITS ETFs to a fund-based Pillar 3a — and how to produce them.
By Danilson Ramos · Founder, Atamatax
Published July 2026 · Updated September 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.
For Americans in Switzerland, Form 8621 may not be a one-off. Swiss and European pooled funds — including UCITS ETFs, Swiss-domiciled funds, and funds inside some invested accounts — commonly have PFIC indicators. Each security still needs classification, and each PFIC with a reporting trigger is generally handled on a separate Form 8621.
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, 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 at $25,000 or less of aggregate PFIC stock ($50,000 MFJ), subject to the full conditions in the current instructions; it does not override separate distribution, disposition, or election triggers.
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.
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)
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.