Wise (TransferWise), the FBAR, and the fund behind 'Interest'

Wise is the default way expats move money between countries — and one of the most commonly forgotten accounts at FBAR time, because it doesn't feel like a bank account. Three questions, in order: does it count, whose is it, and what sits inside it.

Does your Wise account count? The entity decides

Wise holds customers through several legal entities, and which one holds you is set by the address you registered with, not by the currencies you keep. An EEA customer is typically with Wise Europe SA in Belgium, a UK customer with Wise Payments Ltd, a US customer with Wise US Inc. The first two are foreign financial institutions, so the balances are foreign financial accounts for the FBAR and Form 8938. The US entity is not — but a Wise US customer's other non-US accounts still aggregate toward the threshold. Your statement names the entity; a EUR balance held by the US entity is not a foreign account, and a USD balance held by the Belgian one is.

Whose account is it? Joint accounts, businesses and signature authority

A personal Wise account is the owner's to report. A Wise Business account you can move money out of is reportable by you under signature authority even though the money belongs to the company — a common miss for freelancers abroad with a one-person company. Joint ownership is rarer on Wise than on a bank, but where it exists the US person reports the full maximum value. Form 8938's ownership test is narrower and does not reach pure signature authority, which is one reason the two forms can disagree for the same account.

The balances count

A Wise multi-currency account held with a non-US Wise entity (Belgium for the EEA, the UK for the UK — it depends on your address) is a foreign financial account: every currency balance and jar counts toward the $10,000 FBAR aggregate at its maximum value during the year, and toward the Form 8938 thresholds. Money 'just passing through' still counts on the day it's there.

The fund behind 'Interest' and 'Stocks'

Wise's Assets features work by holding your balance in funds: the Interest option in a money-market fund, the Stocks option in a world-equity index fund. Where those funds are non-US domiciled (the general case for non-US customers), a US taxpayer is looking at a PFIC — Form 8621 territory — behind what the app shows as a balance. Wise restricts these features for US persons in many regions, but pre-existing balances and edge cases exist. Check the fund's name and domicile in the product documents — for GBP Interest, Wise names the BlackRock ICS Sterling Government Liquidity Fund. Two more details from Wise's own help pages. An Assets balance does not sit with the payments entity: it is held by a separate investment company, Wise Assets Europe AS (Estonia) for EEA addresses and Wise Assets UK Ltd for UK and Swiss ones, fixed by your address when you switched the balance. That company is foreign too, so the balance still counts. And Wise's US interest program for US-address customers is different in kind: the USD balance is swept into an FDIC-insured account at a US program bank, not into a fund, so it is neither a foreign account nor a PFIC.

One account or several? Multi-currency balances on the FBAR

Wise gives several currencies their own account details — a EUR balance with a Belgian IBAN, a GBP balance with a UK sort code and account number, a USD balance with US routing details — under one customer profile. The FBAR asks for each account's maximum value in US dollars at the Treasury's year-end rate. Balances that carry their own account numbers are, on the cautious reading, separate accounts, each reported at its own peak; a balance with no separate details is part of the one it sits in. Whether the provider's structure lets you combine them is a judgement — the FBAR carries no penalty for listing a balance you could have merged, and a real one for omitting one.

If your entity changed during the year

Wise has moved customers between entities — European customers from its UK entity to Wise Europe SA in Belgium, for instance — and a change of registered address can move you too. When that happens you held an account with each entity for part of the year, and each is reported on that entity's terms at the highest value reached during its period. A move from a foreign entity to the US one does not erase the foreign months: the pre-move peak still counts, and the account still goes on the FBAR for that year. Your statements name the entity for each period.

What to export

• Per-currency statements showing the maximum balance during the year.
• The document that names the holding entity for each part of the year.
• For any Assets balance: the fund name and domicile from the product documents.
• Year-end balances for the Form 8938 EOY test.

If you forgot to report it in an earlier year

Which route applies depends on what else was missed. If your returns reported the income and paid the tax, you file the missed FBARs late with FinCEN with the reason on the form and a reasonable-cause statement — no three-year catch-up. The IRS withdrew its published Delinquent FBAR Submission Procedures, and their printed no-penalty assurance, on July 1, 2026; the examiner standard in IRM 4.26.16 is unchanged. If Wise Interest or Stocks paid a return that was never reported, or no return was filed at all, the question is a Streamlined one. The non-willful FBAR penalty is capped at $16,536 per late report, not per account, and reasonable cause can eliminate it.