Foreign ETFs are almost always treated as Passive Foreign Investment Companies (PFICs) under U.S. tax law, and the PFIC rules are among the harshest in the Internal Revenue Code. Under the default regime, gains and large distributions are taxed at the top ordinary income rate (37% for 2026), plus a compounding interest charge for every year you held the shares. Two elections — the Qualified Electing Fund (QEF) election and the mark-to-market election — can soften the outcome, but each requires annual filing of Form 8621, and QEF depends on the fund’s willingness to cooperate. Miss the filing and the IRS can keep your entire return open for reassessment indefinitely.
Why Foreign ETFs Get Caught by the PFIC Rules
Classification turns on where the fund is legally organized, not where its shares trade. If an ETF is incorporated outside the United States, the IRS treats it as a foreign corporation, even when you buy it through a U.S. brokerage. Domestic ETFs escape this because they are Regulated Investment Companies that pass income directly to shareholders. Foreign funds don’t qualify for that treatment.
A foreign corporation is a PFIC if it meets either of two tests: 75% or more of its gross income is passive, or 50% or more of its assets produce (or are held to produce) passive income.1Office of the Law Revision Counsel. 26 USC 1297 – Passive Foreign Investment Company Passive income here means dividends, interest, royalties, rents, and similar returns. Because ETFs exist to hold portfolios of financial assets, virtually every foreign ETF meets at least one test.
What the Default Regime Costs
Without an election, you fall into the “excess distribution” regime. An excess distribution is any portion of a distribution exceeding 125% of the average distributions from the three preceding tax years, or your holding period if shorter.2Office of the Law Revision Counsel. 26 USC 1291 – Interest on Tax Deferral Any gain on sale is also treated as an excess distribution.
The excess amount doesn’t get taxed in the year received. It’s spread ratably across every year of your holding period, and each prior year’s slice is taxed at the top individual rate that applied that year, regardless of your actual bracket. For 2026, that top rate is 37%. On top of the tax, the IRS adds an interest charge on each prior year’s portion, calculated at the underpayment rate under IRC §6621 and running from the original due date of each of those returns. Only the slice allocated to the current year is taxed at your actual rates.
The combined effect routinely produces an effective rate well above 37%, because you are paying interest on tax the IRS treats as years overdue. That’s the design. The regime is a deterrent, not a tax anyone is meant to live with.
The QEF Election
The Qualified Electing Fund election is the most favorable option, but it requires the fund’s cooperation. To make it, you need the fund to provide a PFIC Annual Information Statement showing your pro rata share of its ordinary earnings and net capital gains.
Under QEF, you include your share of the fund’s ordinary earnings as ordinary income each year, whether the fund distributes cash or not. Your share of net capital gains flows through as long-term capital gain, preserving the preferential rate.3Office of the Law Revision Counsel. 26 USC 1293 – Current Taxation of Income From Qualified Electing Funds Later cash distributions of previously included amounts aren’t taxed again, and your basis increases by the income you reported, so there’s no double taxation on sale.
The catch is availability. Foreign ETF sponsors have no obligation to produce the Annual Information Statement, and most don’t. European UCITS funds, which make up a large share of the foreign ETFs U.S. investors encounter, rarely provide QEF statements. No statement, no election.
The Mark-to-Market Election
When QEF isn’t available, mark-to-market is the practical backup. It’s available whenever the PFIC shares qualify as “marketable stock,” meaning they trade regularly on a national securities exchange or an equivalent foreign market.4Office of the Law Revision Counsel. 26 USC 1296 – Election of Mark to Market for Marketable Stock Most foreign ETFs listed on major exchanges such as the London Stock Exchange or Euronext will qualify.
Each year, you compare the fair market value of the shares at year-end to your adjusted basis. If value went up, you include the increase as ordinary income. If it went down, you can deduct the decrease as an ordinary loss, but only up to your total prior net inclusions (“unreversed inclusions”). Losses beyond that cap are nondeductible. When you sell, gain is ordinary income to the extent of cumulative net mark-to-market inclusions; anything above is capital gain.
The main drawback versus QEF is that all appreciation ends up as ordinary income rather than long-term capital gain. Over a long holding period, that’s a real cost. It is still far better than the default regime with its compounding interest charges.
Once a PFIC, Always a PFIC
The classification is sticky. If a foreign corporation is a PFIC at any point during your holding period, it remains a PFIC as to you for as long as you hold the shares, even if it later fails both tests.5Office of the Law Revision Counsel. 26 USC 1298 – Special Rules The taint attaches to you, not the fund.
The only way out is a “purging election.” You elect to recognize gain as if you sold the shares at fair market value on the first day the fund is no longer a PFIC, or on the first day you want QEF treatment. That gain is taxed under the excess distribution rules, but from then on you start fresh with a stepped-up basis. This matters most when you’ve held PFIC shares for years without an election and want to move to QEF or mark-to-market going forward. Without the purging step, the default regime continues to govern you regardless of what elections you try to make.
Form 8621 and What You File
Every U.S. person who owns PFIC shares files Form 8621 for each PFIC held.6Internal Revenue Service. Instructions for Form 8621 Three foreign ETFs means three forms. Form 8621 attaches to your regular return and follows the same deadlines, including extensions.
What goes on the form depends on your posture. A QEF filing mainly reports the income and gain figures from the fund’s Annual Information Statement. A mark-to-market filing reports the year-end fair market value and the resulting ordinary gain or loss. The default excess distribution calculation is the most involved, requiring allocation across the holding period and interest computations for each prior year.
Small Holdings Exception
If the total value of all your PFIC stock is $25,000 or less on the last day of the year ($50,000 for joint filers), and you didn’t receive an excess distribution or sell shares during the year, you’re not required to complete Part I of Form 8621.6Internal Revenue Service. Instructions for Form 8621 This exception applies only under the default regime. If you have made a QEF or mark-to-market election, you still file each year regardless of account size, because the annual income inclusion must be reported.
The Statute of Limitations Problem
Under IRC §6501(c)(8), failing to file a required foreign information return, including Form 8621, prevents the normal three-year statute of limitations from starting on your entire return. The assessment period stays open until three years after the IRS actually receives the missing form.7Office of the Law Revision Counsel. 26 USC 6501 – Limitations on Assessment and Collection The IRS can revisit every line on your 1040, not just PFIC items, for as long as the form remains unfiled. If you can demonstrate reasonable cause for the failure, the open window narrows to items related to the missing form. Without that showing, the whole return stays exposed.
Choosing Between the Elections
The decision tree is short. If the fund provides a PFIC Annual Information Statement, QEF is almost always the better choice, because the fund’s net capital gains keep long-term capital gain treatment.3Office of the Law Revision Counsel. 26 USC 1293 – Current Taxation of Income From Qualified Electing Funds
If the fund doesn’t provide the statement, which is the norm for retail-accessible foreign ETFs, QEF is off the table. Your realistic options are mark-to-market, if the shares trade on a qualifying exchange, or not holding the fund at all. Both elections must be made on Form 8621 filed with the return for the first year you hold the shares (or on an amended return in the purging scenario). Waiting even one year builds taint under the default regime that you’ll later need to purge.
Where an equivalent U.S.-registered ETF is available, that’s almost always the simpler and cheaper path. The PFIC regime is built to discourage exactly this kind of holding.
FBAR and FATCA Sit on Top
Form 8621 is not the only filing foreign ETFs can trigger. Two other regimes apply independently.
If you hold a foreign ETF in a brokerage account located outside the United States, that account is a foreign financial account for FBAR purposes. You file FinCEN Form 114 if the aggregate value of all your foreign financial accounts exceeds $10,000 at any point in the year.8Internal Revenue Service. Report of Foreign Bank and Financial Accounts (FBAR) FBAR is filed separately through the BSA E-Filing System; the deadline is April 15, automatically extended to October 15.
FATCA is separate again. Form 8938 attaches to your return and reports specified foreign financial assets. For U.S.-resident filers, thresholds are more than $50,000 on the last day of the year or more than $75,000 at any time during the year for unmarried filers, and $100,000 / $150,000 for joint filers.9Internal Revenue Service. Do I Need to File Form 8938, Statement of Specified Foreign Financial Assets Assets already reported on Form 8621 don’t need to be described in detail on Form 8938, but the Form 8621 must be identified in Part IV. Filing FBAR does not satisfy FATCA and vice versa, and penalties are assessed independently.
State Treatment May Not Match
State treatment of PFIC income varies. Some states adopt the Internal Revenue Code on a rolling basis and automatically recognize your QEF or mark-to-market election. Others do not conform, which can leave the state taxing the income differently from the federal return. If your state has an income tax, confirm whether it recognizes the federal PFIC elections before assuming the state calculation mirrors the federal one.