IUSA (iShares Core S&P 500 UCITS ETF (Distributing)) is a conventional Ireland-domiciled UCITS fund. Such funds commonly meet a §1297 passive-income or passive-asset test even when they track the S&P 500 (US large-cap); confirm the vehicle's structure and annual facts before filing Form 8621.
Because it distributes, it can produce a taxable §1291 event in a year you sell nothing at all.
No card · free draft · a CPA typically charges $1,200–$3,000+ for Form 8621 work; Atamatax is a flat $499.
If IUSA is confirmed as a PFIC, you may need a separate Form 8621. For supported inputs, Atamatax generates the official PDF with computed fields filled; review its notes and complete any remaining fields before filing outside Atamatax.
Distributions above 125% of IUSA's prior three-year average are "excess distributions" — taxed under §1291 with interest, in a year you may not have sold anything.
QEF (§1295), mark-to-market (§1296), or the default §1291 — surfaced per holding for you to confirm, never auto-decided.
Same fund, other listings: CSPX (accumulating) · ISIN IE0031442068. They are the same legal instrument; listing venue and currency do not change its entity classification.
This is the part that catches people out. IUSA tracks the S&P 500: Apple, Microsoft, the same 500 US corporations a US-domiciled tracker holds. Every underlying share is American. And yet IUSA itself is an Ireland-domiciled fund, so as far as the PFIC rules are concerned you own a foreign investment company that happens to hold US stock.
A US-organized S&P 500 ETF is not a foreign corporation and therefore cannot be a PFIC. The conventional UCITS wrapper, its foreign corporate form and its passive investment profile are why many US expats end up analyzing Form 8621 for portfolios that otherwise look ordinary. If you hold the other line instead — CSPX (accumulating) — the entity-classification analysis is unchanged: it is the same legal instrument under another listing.
IUSA pays out its dividends from the underlying shares. That matters more than it sounds. Under §1291 each year's total distributions are measured against 125% of the average of the three preceding years; anything above that line is an "excess distribution", spread back across your holding period and taxed at each earlier year's highest ordinary rate, with an interest charge on top.
So a distributing fund can hand you a §1291 event in a year you sold nothing at all — a strong payout year is enough. (The rule spares the first year of your holding period: there is no three-year average yet, so the excess-distribution machinery starts from the following year onward.)
The offsetting practical point is cash. Unlike an accumulating share class, IUSA actually pays you something, so if you elect mark-to-market under §1296 there is at least some income arriving to cover the annual ordinary-income charge. A QEF election under §1295 remains contingent on iShares issuing a PFIC Annual Information Statement for the fund — without that statement, QEF is not an option regardless of share class.
The QEF route for IUSA depends on BlackRock/iShares issuing a PFIC Annual Information Statement covering the year — the ordinary-income-and-capital-gain breakdown §1295 requires. Ask for it in writing before you file rather than after: a QEF election made without the statement to support it is not one you want to be defending later.
IUSA is the iShares Core S&P 500 UCITS ETF (Distributing), ISIN IE0031442068. Match the ticker — and the ISIN, where your statement shows one — to this line before reading the mechanics above as yours.
CSPX is the accumulating share class of the same iShares fund. That is the difference that matters on a US return: IUSA pays its dividends out, so each year's payout is tested under §1291 as a distribution, while CSPX reinvests them and the whole bill waits for the disposition.
Three other S&P 500 funds in this registry raise the same question as IUSA: VUSA, VUAA and VUAG. IUSA follows an S&P index, as VUSA, VUAA and VUAG do. The §1297 analysis does not change from one issuer to the next, and each fund is its own PFIC — its own Form 8621, holding period and election history. What does change is the share class, and whether the issuer publishes a PFIC Annual Information Statement for it.
From one fund to the whole case
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.
This is a screening assessment based on published vehicle facts and the statutory tests—not a classification based on domicile alone, and not individualized tax, legal, or investment advice — see our methodology (IRC §1297 et seq.). Confirm your specific situation with a licensed professional.
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.
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