PFIC and Form 8621: why foreign mutual funds are a US tax trap for expats
If you bought a mutual fund in Portugal, Germany, UK, or any country abroad, you probably own a Passive Foreign Investment Company (PFIC) — a category US tax law penalizes hard. Default treatment can tax gains at 39.6% plus interest charges. Form 8621, QEF election, mark-to-market election, and how to avoid PFICs entirely.
TL;DR
Why PFIC rules exist
In the 1980s, US Congress noticed that US investors were parking money in foreign mutual funds to defer US tax indefinitely. While US-domiciled funds had to distribute income annually (paying out dividends/capital gains the investor would tax-recognize), foreign funds could roll over gains internally for decades, then sell — turning what would have been annually-taxed income into one big capital gain.
Congress responded with the PFIC regime (IRC §§1291–1298) in 1986. The intent: make foreign pooled investments at least as tax-burdensome as US-domiciled ones, ideally more so, to discourage their use.
What counts as a PFIC
A foreign corporation is a PFIC if either:
This catches:
It does NOT catch:
Three treatment regimes
1. Section 1291 (default — punitive)
Applies if you don't make a QEF or mark-to-market election.
Mechanics:
Result: gains from PFICs held for many years can be taxed at effectively 40-50% (37% rate × interest charges).
2. QEF — Qualified Electing Fund (best, often unavailable)
Elect by attaching Form 8621 with QEF election the first year you own the PFIC.
Mechanics:
Catch: requires the fund to provide a US-compatible Annual Information Statement detailing ordinary income vs capital gain at the partner level. Most foreign mutual funds do NOT provide this, so QEF is impossible in practice.
3. Mark-to-Market — for publicly traded PFICs
Elect by attaching Form 8621 mark-to-market election.
Mechanics:
Catch: PFIC must be "marketable" — publicly traded on a qualified exchange. Many foreign mutual funds don't qualify.
Form 8621 — filing requirement
File one Form 8621 per PFIC per year if you held any interest, even briefly, even with zero distribution.
Form 8621 has multiple parts depending on your treatment regime:
Penalty for non-filing: per IRC §6038D-like rules, $10,000+ initial, climbing.
Statute of limitations: tolled until Form 8621 is filed. The IRS can audit forever if you didn't file. Not a typo — there's no SoL until Form 8621 is on file.
Avoidance strategy
For US expats, the cleanest move is avoid PFICs entirely.
Hold US-domiciled funds in a US brokerage
Keep an Interactive Brokers (US entity), Schwab International, or similar US-based brokerage account from abroad. Hold US-domiciled Vanguard / Fidelity / iShares funds. These are NOT PFICs.
Many foreign expats keep a US-resident-only brokerage account (the broker doesn't always know you moved). When you switch to a non-resident broker for US persons abroad, choose one that holds US-domiciled funds.
Hold individual foreign stocks (not foreign funds)
Want exposure to Spanish or German equity? Buy individual shares of Telefónica, BMW, etc. directly. Not a PFIC.
Avoid "local index funds"
That "Portuguese index fund" your local bank sold you for the Portuguese NHR portfolio? Probably a PFIC.
Foreign pension wrappers — case by case
UK ISA: usually contains PFICs (UK funds). Use cautiously.
UK SIPP / Canadian RRSP / Australian Super: may have treaty-based protections. Get specific advice.
What to do if you already have PFICs
Divesting is often the best long-term move even with a painful one-year tax hit.
Sources
*PFIC treatment depends heavily on holding facts and elections. For your specific situation — current holdings, eligible elections, past-year filings — schedule via Telegram or email info@fintaxes.us.*
