Who files Form 8621?

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Answer

US persons holding shares in a foreign pooled investment, including anyone who bought ordinary index funds or mutual funds in the country they moved to. The obligation is decided by facts rather than by tax owing, which is why a nil position does not remove it.

The rule on who files

US persons holding shares in a foreign pooled investment, including anyone who bought ordinary index funds or mutual funds in the country they moved to.

Two of the firm’s advisers at the glass desk in the Delhi office

The exception that catches people

The default regime is designed to be worse than the alternatives: without a timely election, distributions and gains are thrown back across the holding period with an interest charge. The whole planning question is which election to make, and when.

Who files Form 8621?
ItemAmount
Gross amount receivedC$40,000
Withheld at source (assumed 16% of gross)C$6,400
Deductible costsC$33,200
Net amount actually earnedC$6,800
Tax on the net amount (assumed graduated result)C$2,244
Difference recoverable by filingC$4,156

Filing on a net basis recovers C$4,156 of the C$6,400 withheld. That difference is the entire reason the elective return exists, and it is lost by not filing.

Treat these numbers as a worked example rather than advice — they exist to make the mechanics visible, and the rates and thresholds are assumed for the illustration. For a real filing, we verify each figure with the authority that publishes it, for your year.

How to get this moving

The full treatment — who it binds, the deadline, the penalty and the fixed fee — is on 8621 — PFIC. If a letter prompted this, bring the letter — it usually contains the answer to half the questions.

Reviewed for accuracy for the 2025 and 2026 filing seasons by Udit Gupta, Cross-Border Tax Expert, Legal Quotient Consultants. Published as general information. For a position on your own file, call the 24-hour helpline.

Who has to file US tax return, in practice

Most readers of this page are looking for who has to file US tax return. What follows sets out how it works for Form 8621: who is caught by it, what has to be filed, and what the work costs, agreed before it begins.

What these engagements turn on

Case study 1

Local index funds reviewed for the options still open

A client who had moved abroad had been buying into two mainstream local trackers by monthly instalment for several years. Each purchase started its own holding period, so the position was a long series of lots rather than a single investment. We rebuilt the purchase history from the platform records, set out the default treatment lot by lot and identified where an election was still worth making. The engagement produced a schedule of every lot with its acquisition date, and a written recommendation on the treatment of the holding going forward.

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Case study 2

A fund's own reporting tested before an election was chosen

An investor wanted the treatment that taxes the holder on a share of the fund's income each year. That depends on the fund producing figures it is under no obligation to produce, so the first task was to ask each fund in writing what it actually supplies to US holders. For one of the two funds held, nothing was available. The engagement produced the correspondence, a note of what each fund would and would not provide, and an election decision for each holding that rested on what could be evidenced.

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Case study 3

A foreign brokerage account sorted holding by holding

A new client arrived with a foreign brokerage statement running to many pages and a question about whether any of it mattered. Some lines were direct shareholdings and some were pooled vehicles, and the statement did not distinguish them in terms that answered the question. We worked through each line to establish what it was, then grouped the holdings by the treatment that applied. The engagement produced an annotated schedule of the account and a short list of the holdings that needed decisions, which made the following year's work routine.

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Case study 4

A holding period rebuilt for an investor who never elected

A client was preparing to sell a fund bought long before moving and had made no election at any point. Under the default treatment the cost of a sale depends on how long the shares were held, so the work was documentary: establish the original acquisition date, every reinvested distribution that added to the holding, and the currency position at each point. The engagement produced a holding period schedule supported by statements, and a written explanation of how the sale would be treated, prepared before the disposal rather than after it.

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Case study 5

Election timing settled before a first purchase was made

A client about to start investing abroad asked what to buy. The useful answer was not about products but about sequence: the treatment of a pooled holding depends on an election with timing built into it, so the decision belongs at the point of purchase rather than at the first sale. We set out what each candidate vehicle would need to support an election, and what evidence to keep from the first day. The engagement produced a purchase checklist and a written note of the treatment intended for each holding.

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Case study 6

Pooled holdings in a family structure traced to their owners

Pooled funds sat inside a family arrangement abroad and two of the beneficiaries were US persons. Reporting depends on who is treated as owning the shares, so that had to be established from the constitutional documents rather than from the way the family described the arrangement. We set out the ownership position for each fund and each individual. The engagement produced an ownership determination in writing and a reporting position for each of the two individuals, along with a record of which funds sat behind each position.

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Case study 7

Leaving Canada — the Bill You Get for Assets You Still Own

Emigrating triggers a deemed disposition of most holdings, which produces tax on gains never realised in cash. The file values the property, identifies what is excluded, and looks at whether security can be posted rather than the tax paid outright.

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Case study 8

A Family Trust Abroad With Reporting on Both Sides

A trust settled in one country and a beneficiary living in another produces reporting for the trust, the settlor and the beneficiary, on different forms and different dates. The engagement maps who files what before anything is prepared.

Read how this one runs

All case studies — every published engagement in one place.

Core International & Cross-Border Tax Services

International Tax Planning & Advisory

Strategy and compliance for income, assets and families spread across borders.

One coordinating team: filings on every side of the border are sequenced so treaty relief and foreign tax credits are claimed once — and in the right country.

U.S. & Cross-Border Tax Returns

Dual filers: U.S. citizens in Canada and Canadians with U.S. income run two parallel systems — we prepare both, in the right order, every year.

Expat & Emigration Tax

The move year is its own project: the elections and valuations filed that year decide the next decade of both countries’ returns.

Non-Resident Canadian Tax

Default withholding is 25% of gross: elective returns routinely turn over-withheld rent and pensions into refunds.

Transfer Pricing & BEPS

Documentation prepared with the return is the cheapest insurance in international tax; reconstructing it during an audit is the most expensive.

Cross-Border Estates & Trusts

Wills drafted for one country routinely misfire in the other — deemed disposition here, estate tax there, credits in between.

Cross-Border Corporate Tax

Expansion raises the same four questions every time — entity, PE, repatriation, payroll. We answer them before the tax authorities do.

India Tax for NRIs & Returning Residents

The deduction is taken on the sale price, not the gain — which is why an NRI property sale strands cash unless the certificate is applied for before closing.

Canadian Tax with a Foreign Element

Residency is decided on facts, not on a form — and the year you arrive or leave is the one where the largest amounts turn on the smallest details.

UAE Tax for Expats & Their Home Country

A zero-tax country is only half the answer — the question that decides the bill is whether the country you came from still treats you as resident.

Industries & Client Types We Serve Worldwide

Global E-commerce & Marketplaces
Technology & SaaS
Professional Services Firms
Cross-Border Real Estate
Importers, Exporters & Manufacturers
Athletes, Artists & Entertainers
Remote Workers & Digital Nomads
Investment Funds & Holding Companies

Global E-commerce & Marketplaces

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Technology & SaaS

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  • U.S. expansion: entity & PE setup
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Importers, Exporters & Manufacturers

Related-party purchasing, customs value versus transfer price, and foreign-affiliate structures put trading businesses inside the s.247 documentation rules.

Goods crossing a border move the tax question from income to indirect: registration thresholds, place of supply, the customs value and the transfer price between related entities all have to agree with each other. When they do not, the adjustment arrives from two authorities at once and each one uses the other's number.

  • Transfer pricing documentation (s.247)
  • Customs value vs transfer price
  • Foreign affiliate reporting (T1134)
  • Country-by-country reporting
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Athletes, Artists & Entertainers

  • Reg 105 & U.S. CWA agreements
  • Multi-state & country calendars
  • Touring income allocation
  • Royalty & image-rights withholding
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Remote Workers & Digital Nomads

  • Residency analysis before moving
  • Employer payroll exposure
  • Totalization & social security
  • Foreign tax credits
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Investment Funds & Holding Companies

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  • Withholding-efficient routing
  • Governance & substance
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Also asked about Form 8621

Do I file Form 8621 for index funds I bought abroad?

Generally yes, and this is the situation that surprises people most. Ordinary index funds and mutual funds bought in the country someone moved to are foreign pooled investments for these purposes, however mainstream the product is locally. Nothing about the investment needs to be exotic or offshore. A low cost tracker held in a local brokerage account, bought on the advice of a local bank, is the usual fact pattern. The label on the product does not decide it. What decides it is that the investment is a foreign pooled vehicle and a US person holds shares in it.

Do I file if the fund paid no distribution this year?

A quiet year is not a year to ignore. The reporting turns on holding the shares and on what has happened to them, not on whether cash came out, and the default treatment builds through the holding period rather than only in years with a distribution. A run of silent years is precisely what makes a later sale expensive. The practical value of dealing with a holding early is that the choices are still open. The longer a position sits unaddressed, the more of its history is already fixed.

Which election should I make on a foreign fund?

There are broadly two alternatives to the default treatment. One taxes the holder each year on a share of the fund's own income as it arises. The other marks the holding to market annually, so the change in value is brought into account each year whether or not anything is sold. The first depends on the fund supplying figures it has no obligation to produce, so availability is a question of fact rather than preference. The second needs a reliable annual value. Which one fits depends on the fund, the holding period and what the holder intends to do with the position.

What happens if I never made an election on my fund?

The default treatment applies, and it is built to be worse than the alternatives. Distributions and gains are thrown back across the period the shares were held and carry an interest charge for the delay, so the cost of a sale reflects how long the holding sat there rather than only what it made. That is why the holding period is the first thing to establish on any fund that has been held for years. It also explains why two investors with the same gain on the same fund can face very different outcomes.

Does a fund held inside a foreign account still count?

The account is a wrapper. What matters is what is inside it. A pooled fund held through a local brokerage account, a platform or a life assurance style product is still a holding in that fund, and the question becomes who is treated as owning the shares for US purposes. Some wrappers change that answer and many do not. So the review has to go through the account to the underlying holdings, line by line, rather than stopping at the name of the product printed on the statement.

Can I make an election on a fund I have held for years?

The elections have timing built into them, which is the whole reason the planning question is which one and when. A holding that has run for years under the default treatment has already accumulated a history, and an election made now generally addresses the position from here rather than unwinding what came before. That does not make it pointless, because stopping the accumulation has value of its own, but it does mean the earlier years have to be worked out on the default footing first. Establish the holding period before deciding anything.

Why should a Canadian rarely own a US LLC?

Because the two systems classify it differently. The United States generally treats a single-member LLC as transparent while Canada treats it as a corporation, so the income is taxed in different hands in each country and the foreign tax credit does not line up. The result is tax paid twice with no relief to claim. Other structures reach the same commercial outcome without the mismatch. See why a Canadian should rarely own an LLC.

What is a PFIC, and why do Canadian mutual funds cause trouble for US persons?

A passive foreign investment company is a non-US company that is mostly passive by income or by assets — which describes almost every Canadian mutual fund and ETF. For a US owner the default regime taxes distributions and gains punitively with an interest charge for the years the value built up. Two elections fix it, and both need annual information the fund may not produce for you. Holding the same exposure through US-domiciled funds usually avoids the problem entirely. See PFICs and Canadian mutual funds.

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Where our partners studied — CPA Canada (In-Depth Tax Program), AICPA, the Institute of Chartered Accountants of India and the Malaysian Institute of Accountants.

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