Form 8621: PFIC Regimes, QEF Election, and Filing

Form 8621 is the IRS return that U.S. taxpayers who own shares in a passive foreign investment company (PFIC) must file, one for each PFIC held, to report the investment and calculate tax under one of three possible regimes. It travels with your annual income tax return and is due when that return is due, extensions included. Skipping it is unusually costly, because the statute of limitations on your entire return can stay open until the missing PFIC information reaches the IRS.¹

Many ordinary foreign mutual funds and ETFs qualify as PFICs, so the form catches more people than you’d expect. A foreign corporation is a PFIC in any year that 75% or more of its gross income is passive, or at least 50% of the average value of its assets produces (or is held to produce) passive income.² Tripping either test in a single year is enough.

Who Has to File

Any U.S. person who directly or indirectly owns PFIC stock must file a separate Form 8621 for each PFIC if any one of five conditions is met during the year: you received a distribution from the PFIC, recognized gain on selling PFIC stock, are reporting under a QEF or mark-to-market election, are making an election on Part II of the form, or are otherwise required to file the annual report under §1298(f).³ The §1298(f) trigger is broad, and it turns Form 8621 into a near-universal obligation for anyone holding PFIC shares.

The Small-Holdings Exception

You can skip filing for a PFIC that sits in the default tax regime (no QEF or mark-to-market election in place) if three conditions all hold: the total value of all your PFIC stock is $25,000 or less at year-end ($50,000 for joint filers), you didn’t receive an excess distribution, and you didn’t sell any shares during the year.⁴ A separate $5,000 threshold applies to PFIC stock owned indirectly through another PFIC. Miss any condition and you file. Made a QEF election or took an excess distribution? You file regardless of value.

PFICs Held in Tax-Advantaged Accounts

Shares held inside certain U.S. tax-advantaged accounts don’t trigger a filing at all. The exclusion covers traditional and Roth IRAs, 401(k) and 403(b) plans, 457(b) plans, 529 plans, ABLE accounts, and organizations exempt under §501(a).³ A foreign fund sitting inside an IRA generally doesn’t put Form 8621 on your to-do list for those shares.

Indirect Ownership

You don’t have to hold the shares directly. You’re treated as an indirect PFIC shareholder if you own 50% or more of a foreign corporation (that isn’t itself a PFIC) that holds PFIC stock, if you hold a PFIC that owns another PFIC, or if you hold an interest in a pass-through entity that holds PFIC stock. Each PFIC in the chain gets its own Form 8621.³ Invest in a foreign fund of funds where the top-tier fund holds three lower-tier PFICs, and you may owe four separate forms from a single investment.

The Three Tax Regimes

Which figures you put on the form depends on which tax regime applies to your PFIC. Two of the three are elective, and choosing the right one at the right time is the single most important decision in this area.

The Default Excess Distribution Regime

Do nothing and you land here, in §1291, which Congress designed to be punitive. Two events trigger the special calculation: receiving an “excess distribution” or recognizing gain on selling PFIC stock. A distribution is excess to the extent it exceeds 125% of the average distributions you received during the three prior years, or your shorter holding period.⁵ Gain on a sale is treated the same way.

The excess amount is spread ratably across every day of your holding period. The portion allocated to the current year is ordinary income on your return. The portion allocated to each prior year is taxed at the highest individual rate then in effect (37% for 2026),⁶ and an interest charge is stacked on top at the underpayment rate for each year, as though the tax had been owed all along. On a long-held investment, that compounding interest can push the effective tax on the gain past 50%.

Qualified Electing Fund (QEF) Election

The QEF election flips the timing. Instead of waiting for distributions and getting hammered, you include your pro rata share of the PFIC’s ordinary earnings as ordinary income and your share of its net capital gain as long-term capital gain each year, whether or not anything is distributed.⁷ Highest-rate treatment and the interest charge both disappear, and capital gain treatment is preserved on the capital gain portion.

The practical hurdle: you need a PFIC Annual Information Statement from the fund giving you (or letting you compute) its ordinary earnings and net capital gain figures. Foreign funds not marketed to U.S. investors often won’t supply one. Without it, you can’t maintain a QEF election. You make the election by completing Part II of Form 8621 and attaching it to your return for the election year.⁸ Elect in your first year of ownership and it applies cleanly. Elect later and the pre-election years remain tainted under §1291 unless you also file a purging election.

Mark-to-Market (MTM) Election

The mark-to-market election is the fallback when you can’t get the annual information statement a QEF requires. Each year, you include the increase in the shares’ fair market value over adjusted basis as ordinary income. If value drops, you deduct the decrease, but only up to your cumulative prior mark-to-market inclusions (the statute’s “unreversed inclusions”).⁹ Both gains and losses are ordinary, not capital.

Eligibility is the catch. The election is available only for “marketable stock,” meaning shares regularly traded on an SEC-registered national securities exchange, or on a foreign exchange Treasury has determined has adequate rules.⁹ Non-publicly traded PFICs are out. As with QEF, a mid-holding-period election leaves prior years subject to §1291 unless purged.

The “Once a PFIC, Always a PFIC” Rule

If a foreign corporation was a PFIC during any year you held its stock, you continue to be treated as holding PFIC stock every year afterward, even if the company no longer meets either test.¹⁰ A company that was a PFIC in 2020 but has become an active business by 2026 is still a PFIC in your hands.

The escape is a purging election. You elect to recognize gain as though you sold on the last day of the company’s final PFIC year, pay the resulting tax under the §1291 rules, and start fresh.¹⁰ The same purging mechanism cleans up prior-year taint when you switch from the default regime to a QEF or MTM election mid-holding-period. You pay the tax now, but you stop the interest charge from growing.

Filling Out and Filing the Form

Every Form 8621 starts with the same identifying information: the PFIC’s name, country of incorporation, EIN or reference ID, the class of shares held, and acquisition dates. One form per PFIC.¹¹ What you need beyond that depends on your regime.

Under the default §1291 regime, you need the dates and amounts of every distribution received during the year, the average distributions for the three prior years, and full records of any dispositions, so you can compute the excess distribution and the tax and interest charge.
Under a QEF election, you need the PFIC Annual Information Statement showing your pro rata share of ordinary earnings and net capital gain. Without it, the election can’t be maintained.
Under an MTM election, you need the fair market value of the shares at the start and end of the year to compute the annual inclusion or loss, plus your running total of unreversed inclusions to cap any deductible loss.

Attach the completed form to your income tax return and file both together by the return’s due date, including any extensions.³ For most individual taxpayers that’s April 15, or October 15 on extension. Multiple PFICs each get their own form attached to the same return.

What Happens If You Don’t File

There is no standalone dollar penalty for missing Form 8621. The consequence is procedural, and worse. The statute of limitations on your entire tax return stays open until three years after the IRS receives the missing PFIC information.¹ The usual three-year clock never starts. Years later, the IRS can still assess additional tax, interest, and accuracy-related penalties on any item on that return.

If the failure was due to reasonable cause and not willful neglect, the open limitations period is narrowed to items related to the missing PFIC reporting rather than the whole return.¹ That’s meaningful, but reasonable cause is a defense you’d rather not have to raise. Filing, amending if necessary, is the safer route.

Where Form 8621 Fits Alongside FATCA and FBAR

Form 8621 does not replace your other foreign-asset reporting. A PFIC reported on Form 8621 generally doesn’t need to be duplicated on Form 8938 (Statement of Specified Foreign Financial Assets), but you must note on Form 8938 that the asset was reported on Form 8621. The Form 8938 obligation and the FBAR obligation stand on their own, both from each other and from Form 8621. Filing one does not excuse the others.

1
Office of the Law Revision Counsel. 26 USC 6501 – Limitations on Assessment and Collection
2
Office of the Law Revision Counsel. 26 USC 1297 – Passive Foreign Investment Company
3
Internal Revenue Service. Instructions for Form 8621
4
eCFR. 26 CFR 1.1298-1 – Section 1298(f) Annual Reporting Requirements
5
Office of the Law Revision Counsel. 26 USC 1291 – Interest on Tax Deferral
6
Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026
7
Office of the Law Revision Counsel. 26 USC 1293 – Current Taxation of Income From Qualified Electing Funds
8
eCFR. 26 CFR 1.1295-1 – Qualified Electing Funds
9
Office of the Law Revision Counsel. 26 USC 1296 – Election of Mark to Market for Marketable Stock
10
Office of the Law Revision Counsel. 26 USC 1298 – Special Rules
11
Internal Revenue Service. About Form 8621