A US-domiciled ETF is not a PFIC. A non-US ETF — including the Irish and Luxembourg UCITS funds most European and Asian brokers offer — is a pooled foreign vehicle and almost always needs PFIC analysis, because it is the fund's legal domicile that matters, not the exchange it trades on or where you live.

Does an ISIN prove a fund is a PFIC?

No. The first two characters of an ISIN identify the issuing jurisdiction, which is a strong screening signal but not the statutory test. PFIC status turns on the §1297 income and asset tests, and the ISIN prefix is not always the fund's tax domicile.

Is a UCITS fund always a PFIC?

A UCITS fund is a non-US pooled investment vehicle, so in practice it will normally meet the PFIC income or asset test and require analysis. It is still an analysis rather than an automatic status, and the filing requirement then depends on your holding, the reporting triggers and the exceptions in the Form 8621 instructions.

The checker says my fund is likely a PFIC. What does that cost me?

That depends on what happened during the year, not on the classification. A fund held all year with no distribution is a reporting question; a fund you sold, or one that paid an excess distribution, brings the §1291 calculation. Use the Form 8621 calculator for the tax, and the PFIC filing cost calculator for the preparation cost.

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Is my fund or ETF a PFIC?

Conventional foreign mutual funds and UCITS ETFs commonly need PFIC analysis, while an ISIN or domicile alone cannot establish the legal result. Choose your country and holding type—or paste several ISINs—to screen the facts, see possible Form 8621 implications and identify the next record to collect. This is educational compliance screening, not a tax liability calculator or a filing determination: once you know a holding is a PFIC, the Form 8621 calculator is where the numbers get worked out.

1 · Where do you live?

Where you live changes the products you are likely to hold and the guidance you get next. It does not change how the PFIC rules classify a holding — those turn on the fund, not your address.

2 · Where do you hold it?

3 · What do you hold?

Or paste your ISINs — one per line

Result

Tell us what you hold

Pick the closest match on the left, or paste your ISINs below and we'll flag each one.

Educational estimate, not tax advice. Domicile is the fund's legal home, not the broker or exchange you used. Broker and provider policies change — confirm current terms with your provider before acting.

What this tool answers

One question, answered properly.

It answers

Whether one foreign fund or ETF is likely a PFIC that needs Form 8621, from its vehicle type, legal domicile or ISIN — and which fact to confirm next when the answer is not clean.

It does not answer

The tax. Classification and calculation are separate steps, and a domicile is a screening fact rather than the statutory §1297 income and asset tests.

The rest of the PFIC cluster

Each of these answers a different question.

FAQ

Is my fund a PFIC?

Is my ETF a PFIC?: A US-domiciled ETF is not a PFIC. A non-US ETF — including the Irish and Luxembourg UCITS funds most European and Asian brokers offer — is a pooled foreign vehicle and almost always needs PFIC analysis, because it is the fund's legal domicile that matters, not the exchange it trades on or where you live.
Does an ISIN prove a fund is a PFIC?: No. The first two characters of an ISIN identify the issuing jurisdiction, which is a strong screening signal but not the statutory test. PFIC status turns on the §1297 income and asset tests, and the ISIN prefix is not always the fund's tax domicile.
Is a UCITS fund always a PFIC?: A UCITS fund is a non-US pooled investment vehicle, so in practice it will normally meet the PFIC income or asset test and require analysis. It is still an analysis rather than an automatic status, and the filing requirement then depends on your holding, the reporting triggers and the exceptions in the Form 8621 instructions.
The checker says my fund is likely a PFIC. What does that cost me?: That depends on what happened during the year, not on the classification. A fund held all year with no distribution is a reporting question; a fund you sold, or one that paid an excess distribution, brings the §1291 calculation. Use the Form 8621 calculator for the tax, and the PFIC filing cost calculator for the preparation cost.

How Atamatax calculations are produced — the tests applied, statutory sources and review cadence — is documented in the methodology, and what is and is not reviewed in accuracy & review. Calculation fixes are recorded in the changelog.