What is Form 8621 and why do foreign mutual funds trigger it?

Form 8621 reports a Passive Foreign Investment Company, or PFIC — and most non-U.S. mutual funds and many foreign ETFs are PFICs in the IRS's eyes. A foreign fund is a PFIC if it's mostly passive-income-producing or passive-asset-holding, which describes nearly every Indian or European mutual fund. The problem is that the default PFIC tax regime is punitive: gains and certain distributions get taxed at the highest rate with an interest charge, and you generally file a separate Form 8621 for each fund each year. Electing mark-to-market or QEF treatment can soften it, but the paperwork is real. The practical takeaway for immigrants: holding U.S.-domiciled funds is usually far simpler than keeping foreign mutual funds. PFIC mechanics get deep fast, so treat this as a flag to consult someone — and consider whether to unwind foreign funds. See wealthserene.com/for/immigrant-nri.