IRS Form
IRS Form 8621: Passive Foreign Investment Company Reporting
IRS Form 8621 is the information return US taxpayers use to report interests in a passive foreign investment company (PFIC) and to make elections about how that investment is taxed. It applies the PFIC regime, which targets deferral through foreign pooled investments.
Overview
What Form 8621 is
Form 8621 is an information return that reports a US person’s interest in a passive foreign investment company, known as a PFIC. It is the mechanism through which the PFIC rules are applied to an individual investment, and it is where certain elections about the tax treatment of that investment are recorded.
The form is not a tax in itself. Instead, it channels a foreign investment into one of several possible tax treatments under the PFIC regime, which then determines how income and gains from that investment are reported on the wider return.
Why the PFIC regime exists
The PFIC rules were introduced to remove a perceived advantage. Without them, a US taxpayer could hold passive investments inside a foreign corporation and defer US tax on the income and growth accumulating inside that structure. The regime is designed to discourage that deferral by applying less favourable treatment to investments that meet the PFIC tests.
Because the definition turns on the nature of the underlying income and assets rather than the label of the vehicle, many ordinary non-US pooled investments fall within it. This is why the topic is so significant for US taxpayers living abroad.
Who generally files it
- US persons who hold shares in a foreign corporation that meets the PFIC income or asset tests.
- US taxpayers abroad who own non-US mutual funds, investment trusts, or similar pooled vehicles.
- Investors who need to make or maintain a PFIC election for a particular holding.
- Anyone whose foreign investment structure channels passive income in a way that triggers the regime.
Process
How it fits into the filing process
Identify PFIC holdings
Review foreign investments to determine which entities meet the PFIC income or asset tests for the period.
Determine the treatment
Establish which PFIC method or election applies to each holding, as this drives how income and gains are reported.
Complete a form per holding
The reporting generally applies on a per-investment basis, so multiple holdings can mean multiple forms.
Integrate with the main return
The results flow through to the wider individual return alongside other income and information reporting.
Key facts
- Form type
- Information return and election vehicle
- Regime
- Passive foreign investment company (PFIC) rules
- Common trigger
- Non-US pooled investment funds
- Filed with
- The main US individual income tax return
How it relates to other filings
Form 8621 does not stand alone. It works with the main US individual tax return and can interact with other information reporting for foreign assets, such as FATCA disclosures. For US taxpayers in the UK, it frequently arises because common UK investment vehicles meet the PFIC definition, making it a central part of managing an investment portfolio across two tax systems.
Frequently asked questions
Form 8621 is the information return US taxpayers use to report interests in a passive foreign investment company (PFIC) and to make or reflect certain elections about how that investment is taxed.
It exists so the IRS can apply the PFIC regime, a set of rules designed to prevent US taxpayers from deferring tax by holding passive investments through foreign entities such as non-US pooled funds.
US persons who hold shares in a foreign corporation that meets the PFIC income or asset tests generally file it, commonly those holding non-US mutual funds, investment trusts, or similar pooled vehicles.
It sits alongside the main Form 1040 and can interact with other information returns. Many UK-resident US taxpayers encounter it because common UK investment funds are treated as PFICs.
Holding non-US investment funds?
PFIC reporting is one of the most technical areas of US expat tax. We can help you understand how it applies to your portfolio.