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Form 8621 · PFIC

Form 8621 (PFIC): what it is, who files, and how to complete it

The IRS information return for passive foreign investment companies — who has to file, the $25k/$50k exception, and the three tax regimes (§1291, QEF, mark-to-market).

By Danilson Ramos · Founder, Atamatax

Published July 2026 · Updated November 2026

Reviewed and approved by our EA/CPA team on .

Direct answer

Who has to file Form 8621?

A US person who directly or indirectly owns shares of a passive foreign investment company — in practice, most non-US mutual funds and ETFs — generally files a separate Form 8621 for each PFIC, each year.

The annual report can be excused for a year with aggregate PFIC value of $25,000 or less on the last day of the year ($50,000 MFJ), when no QEF or mark-to-market election applies and there was no excess distribution and no gain on a disposition. An excess distribution, a gain on a sale or an election requires the form regardless of value.

Primary source
About Form 8621 — Information Return by a Shareholder of a PFIC or QEF

What changes the answer

  • The fund is US-domiciled (an ISIN starting US, a '40 Act fund): not a PFIC, however and wherever it is held.
  • The year had aggregate PFIC value of $25,000 or less on the last day of the year ($50,000 MFJ), with no excess distribution, no gain on a disposition and no election: the annual report may be excused.
  • A QEF or mark-to-market election is in force: the form is still filed, but the computation changes.

Next step: Check whether a fund is a PFIC (free)

Check it for your own holding

Could this investment be a PFIC?

Two questions and, if you have it, the ticker or ISIN. The read is immediate, nothing you enter leaves this page, and it names what would settle the rest.

Free, no account, nothing you answer leaves this page. Open the full portfolio scanner

What is it?

Screened against the fund registry on this page. It is never sent anywhere.

A screen. Whether a fund is a PFIC turns on its own annual income and asset facts under §1297; the read above says how far your answers go and what would settle the rest.

Form 8621 is the IRS information return a U.S. person files for a passive foreign investment company (PFIC) — in practice, most non-U.S. mutual funds and ETFs. If you hold foreign funds, this is usually the form mainstream tax software leaves out.

Filing in 2027 normally covers tax year 2026. Atamatax currently provides supported calculations and worksheets for that year; final official 2026 PDFs and professional review are not included. The 2027 filing guide lists form readiness, exchange-rate dependencies and the separate CPA Export handoff.

Who has to file Form 8621?

Broadly, a U.S. person who is a PFIC shareholder and receives certain distributions, disposes of PFIC stock, makes or reports a QEF or mark-to-market election, or is otherwise required to file the annual report under IRC §1298(f). The IRS Form 8621 instructions set out the full list. The obligation is annual, so a fund held through years that were never filed adds a Form 8621 to each of those years — which is what makes a Streamlined catch-up with foreign funds in it a larger piece of work than one without.

Annual-report exception: the current instructions provide a limited exception from the §1298(f) annual report for a year with aggregate PFIC value of $25,000 or less on the last day of the year ($50,000 MFJ), or certain indirect PFIC stock of $5,000 or less. It applies only to §1291 funds (no QEF or mark-to-market election) and is lost in a year with an excess distribution or a gain on a disposition. Confirm the full conditions against the instructions for the filing year.

The three tax regimes

  • §1291 (default) — gain and excess distributions are allocated across the holding period. Current-year and pre-PFIC portions are ordinary income; prior PFIC-year portions attract the applicable highest-rate tax and an interest charge.
  • QEF (§1295) — you include your pro-rata share of the fund's ordinary earnings and net capital gain each year.
  • Mark-to-market (§1296) — you mark the stock to fair value annually, as ordinary income or loss.

When a reporting trigger applies, each PFIC is generally handled on a separate Form 8621. Several funds or several reporting years can therefore produce several forms.

For additional background on PFIC rules, elections, and cross-border investment structures, see Recalde Law Firm's guide to PFICs and cross-border investment structures.

Late or missed Form 8621

Filing the return without a required Form 8621 does not make the PFIC go away, and it has one consequence most people do not expect: under IRC §6501(c)(8), the limitations period for the entire return — not only the PFIC items — stays open until three years after the missing form is furnished. A year that would otherwise have closed does not close. There is no separate dollar penalty for the missing form itself, but the §1291 tax and interest on any excess distribution or gain in that year are still owed, and the interest keeps running.

Which route fixes it depends on whether the rest of the return was right:

  • The return was otherwise complete — the fund's income and any sale were reported, only the form is missing → amend the year on Form 1040-X with the Form 8621 attached, computing the §1291 tax where a distribution or disposition occurred. A form that is late can still be filed; a QEF or mark-to-market election, by contrast, is generally made on a timely filed return for the election year, so a late year defaults to §1291 and an election is available prospectively, from the first year filed on time.
  • You live in the U.S. and the return was otherwise complete → the same Form 1040-X with the Forms 8621 attached. The Streamlined Foreign Offshore Procedures require non-residency, so they are not the route for a U.S. resident, and an otherwise complete return does not need a catch-up procedure at all. Filed your return without Form 8621? walks through the correction.
  • The return missed more than the form — unreported fund income, unfiled FBARs, or unfiled returns → the Streamlined Foreign Offshore Procedures, where the three amended or delinquent returns carry every Form 8621 the years require. This is the common case for a fund inside a foreign brokerage account that was never reported at all.
  • Several funds, several years → the count of forms decides the tier, not the size of the balances. Run the portfolio analyzer first so the number is known before the route is chosen.
A missed Form 8621 is a reason to fix the year, not a reason to keep the year open: the statute stays open for as long as the form stays unfiled. Whether amending or Streamlined is the right vehicle is fact-specific — the eligibility check screens the Streamlined gates for free.

Work through your Form 8621

Build the default §1291 worksheet on your own numbers. This is general information, not individualised tax advice.

Build my §1291 worksheet
Educational overview, not tax advice — verify your filing obligation against the current IRS Form 8621 instructions or with a qualified professional.

From one fund to the whole case

What does your PFIC situation actually require?

Four questions — how many funds, for how long, whether Forms 8621 were ever filed, whether the returns are current — and a route into the preparation that fits, with what it costs. Nothing you answer leaves this page.

Free, no account, nothing you answer leaves this page. Open the full portfolio scanner

How many non-US funds or ETFs do you hold?

Count each fund, not each account. Funds inside a wrapper (ISA, TFSA, Pillar 3a, super) count.

For how many tax years have you held them?

Including the current year. A fund bought in 2023 and still held is three years.

Has a Form 8621 been filed for them before?
Are your US tax returns themselves up to date?

A routing read, not a determination. Whether a fund is a PFIC, whether an exception applies and what a prior year needs are established when the holdings are screened; the route above says where that happens and what it costs.

Authorities cited

  • IRS Form 8621 — About Form 8621 — Information Return by a Shareholder of a PFIC or QEF
  • Instructions for Form 8621 — IRS — Instructions for Form 8621, Information Return by a Shareholder of a PFIC or QEF

Primary sources (Cornell Legal Information Institute for the US Code and CFR; IRS.gov for forms, procedures, and treaty documents). This page is general information, not individualized tax or legal advice.

Atamatax provides tax preparation support and educational resources. This website does not constitute legal or tax advice.

Frequently asked questions

Who must file Form 8621?#
A U.S. person who is a PFIC shareholder with certain distributions, a disposition of PFIC stock, a QEF or mark-to-market election to report, or an annual-report requirement under §1298(f). The IRS instructions have the complete list.
Is there a minimum below which I don't file?#
The instructions provide an exception from the annual §1298(f) report for a year with aggregate PFIC value of $25,000 or less on the last day of the year ($50,000 MFJ), but only for §1291 funds and only in a year with no excess distribution and no gain on a disposition. It is not a blanket exemption from every part of Form 8621, so verify the conditions for your facts and filing year.
What if I filed my US return but forgot Form 8621?#
The return's limitations period stays open under IRC §6501(c)(8) until three years after the missing form is filed, and any §1291 tax and interest for that year remain due. If the rest of the year was reported correctly, amend it on Form 1040-X with the Form 8621 attached; if fund income, FBARs or whole returns were also missed, the Streamlined Foreign Offshore Procedures are the published route and carry every Form 8621 the three years need.
How many Forms 8621 do I file?#
A separate form is generally prepared for each PFIC for which a reporting trigger applies in that year. Several funds or several reporting years can therefore mean several forms.
Is switching between funds a taxable event for PFIC purposes?#
Generally yes. Selling one fund and buying another is a disposition and an acquisition, and it does not matter that the money never left the wrapper or the platform — a switch inside an ISA, an assurance-vie or a pension is still a disposition of the first holding. Under the default §1291 regime that disposition is precisely the event the excess-distribution computation runs on, allocating the gain back across the holding period with an interest charge. Platforms that market rebalancing as frictionless are describing the local tax treatment, not the US one, and a decade of quarterly rebalancing can be a decade of dispositions.
What should I do if I omitted Forms 8621 in earlier years?#
Take it seriously but not fatalistically: it is a common situation with defined routes out. The reason it matters more than its size suggests is that where a required international information return was not filed, the assessment period for the return can stay open — and it is the whole return that stays open, not just the omitted form, so waiting is not a strategy. Which route fits depends on what else those years got wrong: if the returns were otherwise complete you are looking at amendments, and if years were unfiled or income was unreported the Streamlined Foreign Offshore Procedures are the framework. Scope it before choosing, because the two routes are not interchangeable and the work does not transfer.

Related guides

Preparation · price before you start

If you want the Forms 8621 prepared

Which route fits depends on a few facts, not on the balances. These are the common situations and the route the same rules give each one. Nothing is charged until you generate a package or accept a written quote.

  1. Your returns are up to date and the non-US funds are the complication

    PFIC Portfolio · $499 · Self-service software

    PFIC Portfolio covers portfolios of four to twenty-five likely PFICs, with a Form 8621 drafted per fund.

    What arrives, who prepares and checks it, and who files

    Everything in Simple plus up to 25 supported Forms 8621 — line-mapped worksheets until independent validation of the official PDFs completes — with QEF / mark-to-market / §1291 inputs per holding, fund-domicile classification with confidence shown, and the assumption log — for one tax year.

    The Atamatax engine prepares a draft package from the figures you enter and confirm. No person prepares it.

    Nobody at Atamatax reviews it before you download it. A package generated with an open gap is stamped DRAFT — INCOMPLETE and lists what must be resolved, and every assumption is listed for you, or a professional you choose, to check.

    You file — the return with the IRS using the package's instructions, the FBAR on FinCEN's BSA E-Filing System — or a professional you engage files for you. Atamatax transmits nothing to the IRS or FinCEN.

    Prepare my PFIC portfolio

  2. You already work with an accountant who files for you

    CPA Export · $199 · Accountant handoff

    You already have an accountant. CPA Export gives them the per-fund PFIC screen with its reasons and the threshold arithmetic, so the fund question is settled before the return is drafted.

    What arrives, who prepares and checks it, and who files

    A PDF hand-off for an accountant: the holdings and PFIC classification table, the potential Form 8621 workload, FBAR/Form 8938 threshold logic, worksheets mapped to form lines, and the assumption log — for one tax year.

    The engine builds the PFIC analysis and the worksheets from the entries you confirm. Your accountant prepares the return from them.

    Nobody at Atamatax reviews the export before you download it. Your accountant checks it — every classification and figure carries the assumption behind it.

    Your accountant files the return, or you do; the FBAR is filed on FinCEN's BSA E-Filing System. Atamatax transmits nothing to the IRS or FinCEN.

    Build my CPA Export

  3. Returns, FBARs or Forms 8621 are missing for earlier years

    Streamlined Investor · $2,200 · Done-with-you case preparation, scoped first

    The catch-up years include non-US funds or a personal foreign plan, so each back year needs PFIC work as well as the return and the FBAR.

    What arrives, who prepares and checks it, and who files

    A Streamlined Foreign Offshore preparation package: up to three delinquent returns and six FBAR years as worksheets mapped to each year's official forms (official pre-filled PDFs only for tax year 2025), a document completeness check, the Form 14653 organiser, and filing instructions — one scoped quote, one payment.

    A CPA or Enrolled Agent from the Atamatax team, assigned according to your case (its forms, countries and complexity), prepares the three returns, the six FBAR years and the Form 14653 organiser from your documents, against the written scope, with the engine computing the figures, and signs as paid preparer. They are named on your case once they accept. If no professional has been assigned 7 days after payment, you choose between waiting and a full refund. You write your own statement of facts.

    The CPA or Enrolled Agent assigned to your case reviews and answers for the work they sign; a person at Atamatax checks the file is complete before it reaches you.

    You mail the returns to the IRS as the Streamlined instructions direct, and file the FBARs on FinCEN's BSA E-Filing System. Atamatax transmits nothing to the IRS or FinCEN.

    Get a scoped quote

  4. More than twenty-five funds, or the fund facts are incomplete

    Confirm the scope before choosing a package · Free to ask

    More than twenty-five likely PFICs is past the included limit of every package; the scope is confirmed by hand before a price is named.

    What arrives, who prepares and checks it, and who files

    Free to ask. A person reads the facts and says whether Atamatax can take the case, and which route it would be.

    A person at Atamatax reads the facts before any route is offered.

    See whether Atamatax can take the case

When a professional's judgment is needed. Checkout stops and sends you to a person when there are more than twenty-five likely PFICs. Whether a late QEF or mark-to-market election can still be made turns on the facts and is a professional's call — if that is your question, ask before you buy.

In every route the signatures and the filing stay with you or the accountant you choose; nothing is filed on your behalf. Written questions to hello@atamatax.com reach a person — we aim to reply within one business day. Who does what in each route.

Free preliminary result · a few questions

Build your PFIC filing map

Know what PFIC reporting means for your own holdings: how many Forms 8621 are likely, whether the year produced tax or only reporting, and what else your situation pulls in.

Build my PFIC filing mapNo signup. Answers stay yours.

Your next step · free

How many Forms 8621, and how heavy?

Holdings, years and any elections in; an estimate of the forms and the regime out. It is the number that decides whether this is a self-serve return or a scoped case. Free, no account.

Estimate my Form 8621 workloadBuild my §1291 worksheet