Broker · Global
Interactive Brokers, PFICs & Form 8621
Which IBKR entity holds your account, which of your holdings are actually PFICs, and what the account itself triggers separately from the securities in it.
By Danilson Ramos · Founder, Atamatax
Updated August 2026
Takes ~2 minutes — then continues into your full free diagnostic.
Interactive Brokers is the broker US expats most often keep, because it serves clients in most countries and does not automatically close accounts on a move abroad. That makes it the platform where the PFIC question comes up most — and where it is most often misunderstood.
The account is not the PFIC
A non-US IBKR account holding nothing but Apple shares is a reportable foreign financial account with no PFIC issue. A US-based IBKR account holding Irish UCITS ETFs has no FBAR issue from that account but a real PFIC one. Sorting your situation starts with separating those two questions.
Which IBKR entity holds your account
IBKR operates through separate regulated entities, and yours is named on your statements and account documents. The entity determines the product shelf you can access, which in turn drives PFIC exposure:
| Entity | Typical client | Practical effect on PFIC exposure |
|---|---|---|
| IBKR LLC (US) | US residents | Full access to US-domiciled ETFs; PFIC exposure only if you deliberately buy non-US funds |
| IBKR Ireland / Central Europe | EU residents | PRIIPs restricts US-domiciled ETFs, so the ETF shelf is UCITS — PFICs by default |
| IBKR UK | UK residents | Similar restrictions; UK and Irish funds dominate the shelf |
| IBKR Hong Kong / Singapore / Australia | APAC residents | Mixed shelf; check each fund's domicile individually |
Being migrated between entities after a move is common, and it can change what you are able to buy without changing anything you already hold. Confirm current entity and product policy with IBKR — this is a description of the general pattern, not a statement about your account.
Which of your holdings are likely PFICs
| Holding at IBKR | PFIC? | Typical filing |
|---|---|---|
| UCITS ETF (ISIN IE, LU) | Likely | Form 8621 per fund, per year |
| Non-US mutual fund or SICAV | Likely | Form 8621 per fund, per year |
| US-domiciled ETF (ISIN US…) | No | Ordinary reporting |
| Individual shares, US or foreign | No | Report the account |
| Non-US money-market or cash fund | Likely | Check the ISIN on the cash line |
Pulling the data out of IBKR
- In Client Portal, open Performance & Reports → Statements and run an Activity Statement for the full tax year.
- Export it as CSV, which includes the positions section with ISIN and quantity for each holding.
- Use each ISIN prefix as a screening signal, then confirm the issuer, legal structure, asset type and fund domicile; a non-US prefix alone is not a PFIC classification.
- Note the account's maximum value during the year for the FBAR — the peak, not the year-end balance.
- Check the cash line for a sweep fund ISIN; an uninvested balance parked in a non-US money-market fund is itself likely a PFIC.
FBAR and Form 8938
An IBKR account held through a non-US entity is a foreign financial account. It counts toward the $10,000 FBAR aggregate — the combined peak across all your non-US accounts at any point in the year — and toward the Form 8938 thresholds, which are higher and vary by filing status and whether you live abroad. Both can apply at once, and they are filed separately: the FBAR with FinCEN, Form 8938 with your return.
Turn your Activity Statement into a filing plan
Paste your ISINs, import a supported positions CSV, or run the whole portfolio through the analyzer to identify holdings that need PFIC review and map the next information required. Atamatax is tax-preparation software, not a CPA firm, and this is not individualised tax advice.
Authorities cited
- IRC §1297 — IRC §1297 — Definition of a passive foreign investment company
- IRS Form 8621 — About Form 8621 — Information Return by a Shareholder of a PFIC or QEF
- IRC §1291 — IRC §1291 — Interest on tax deferral (excess-distribution regime)
- IRS Form 8938 — About Form 8938 — Statement of Specified Foreign Financial Assets
- FinCEN Form 114 (FBAR) — Report of Foreign Bank and Financial Accounts (FBAR)
- 31 CFR §1010.350 — 31 CFR §1010.350 — FBAR (FinCEN Form 114) filing requirement and $10,000 threshold
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.