Your Portuguese banker will suggest fundos de investimento. Don't buy them. They're PFICs under IRS rules, and the effective tax rate on gains can exceed 50%. Here's what to avoid and what to do instead.
A Passive Foreign Investment Company (PFIC) is any non-US fund where 75%+ of income is passive or 50%+ of assets produce passive income. This covers virtually every mutual fund, ETF, and managed investment product offered by Portuguese banks — Millennium BCP, Caixa Geral de Depósitos (CGD), Novo Banco, BPI, Santander Totta, and Bankinter.
Fundos de investimento mobiliário (securities funds), fundos de investimento imobiliário (real estate funds), ETFs listed on Euronext Lisbon, PPR savings plans with fund components, and unit-linked insurance products with investment sub-accounts. Even "conservative" euro money market funds trigger PFIC. The guide lists the specific product families by bank.
Under the default "excess distribution" method: gains are spread across your entire holding period, taxed at the highest marginal rate for each year (37% federal), plus compounding interest charges. A fund held 7 years with 40% total gain can face an effective tax rate of 45-55%. The guide includes calculation examples at different holding periods and gain levels.
Keep investments in US-based accounts. US mutual funds and ETFs through US brokerages (Schwab, Fidelity, Interactive Brokers) are not PFICs. Interactive Brokers is particularly popular with US expats in Europe because it maintains accounts for Americans abroad. The guide covers which US brokerages work from Portugal and address/compliance considerations.
If you hold PFICs without proper reporting, use the IRS Streamlined Filing Compliance Procedures to catch up with reduced penalties. The guide walks through the process for Americans in Portugal specifically, including how to gather Portuguese fund statements in the format needed for Form 8621.
PPR (Planos Poupança Reforma) plans that invest in funds are likely PFICs. PPRs with guaranteed returns (insurance-based) may have different treatment. The guide covers which PPR structures are problematic and whether the US-Portugal Tax Treaty provides any relief for retirement products. Full tax overview →
If you buy US-listed ETFs (like VTI, VOO) through a European broker, those US ETFs are not PFICs. But European-domiciled ETFs (UCITS funds like VWCE, IWDA) listed on European exchanges are PFICs — even if they track US indices. The guide clarifies exactly which products on which platforms are safe. Banking options →
Educational content only — not tax or legal advice. This guide is an orientation document. Tax law is complex and individual situations vary. Always consult a qualified US expat CPA and a licensed local attorney before making financial, visa, or property decisions. Figures are verified as of the date shown and subject to change. Full disclaimer →