FBAR and FATCA for Cook Islands trust accounts

Written and reviewed by Connor SteensJohn Evans
Updated
offshore trusts
Flag of the Cook Islands
Asia PacificCook Islands
FBAR
Filed with FinCEN
Not the IRS
FATCA Form 8938
Filed with IRS
Higher asset thresholds
Both apply
Independently
Miss either and face penalties
FBAR threshold
$10,000 at any point
During the calendar year

What FBAR requires

FinCEN Form 114, known as the Report of Foreign Bank and Financial Accounts, has to be submitted by any US person holding a financial interest in, or signature authority over, one or more foreign financial accounts whose combined value tops $10,000 at any moment in the calendar year. An account of a Cook Islands trust owned by a US grantor trust owner falls within this rule. Rather than going to the IRS, the FBAR is submitted electronically to the Financial Crimes Enforcement Network. The deadline is April 15, with an automatic extension running to October 15.

What counts as a financial interest reaches well beyond outright ownership. A US person is deemed to hold a financial interest in a foreign account when they are the record owner or hold legal title, and also when someone else maintains the account on that US person's behalf. Where a grantor trust settlor is regarded as the trust's owner, that settlor holds a financial interest in the trust's foreign accounts for FBAR purposes.

What FATCA requires

Under the Foreign Account Tax Compliance Act, US persons must disclose specified foreign financial assets on Form 8938, the Statement of Specified Foreign Financial Assets, which accompanies their personal income tax return. These thresholds sit above the FBAR level: a single filer reports at $50,000 held at year end or $75,000 reached at any time during the year, and the figures rise for married filers and for US persons resident overseas.

For FATCA, a Cook Islands trust counts as a specified foreign financial asset whenever the grantor trust rules treat the settlor as owning the trust. The figure disclosed is the value of the trust's assets. When the same account triggers both an FBAR and a Form 8938, each filing must be made separately, because completing one does not discharge the duty to complete the other.

How they interact

Running side by side, FBAR and FATCA differ in their overseeing agency, their forms, their thresholds, and how their penalties are structured. FBAR kicks in at the lower $10,000 mark and goes to FinCEN, whereas FATCA starts at the higher $50,000-and-up level and goes to the IRS. The very same Cook Islands trust accounts fall under both. A CPA handling foreign trust filings takes care of both, together with Forms 3520 and 3520-A, as one full annual compliance package.

The penalty regimes

For non-wilful FBAR breaches, the penalty can reach $10,000 per violation. A wilful breach carries whichever is greater of $100,000 or 50 percent of the account balance for each violation, and may lead to criminal prosecution. Because courts have treated every year left unfiled as its own separate violation, failing to file FBAR on a large account over several years can generate total penalties well beyond what the account itself is worth.

Penalties on FATCA Form 8938 begin at $10,000 for a failure to disclose, then climb by a further $10,000 for every 30-day stretch that non-disclosure continues once the IRS gives notice, capped at $50,000. On top of that, where the non-disclosure leads to underpaid tax, a further 40 percent penalty applies to the portion of the underpayment tied to the undisclosed foreign financial assets.

This is general information only. The FBAR and FATCA regimes are intricate and the penalties are harsh. Verify exactly what applies to you with a CPA, and where wilful non-compliance may be an issue, involve a tax attorney too.

Speak to a specialistHave questions about the tax duties tied to your trust?A private call, in which we put you in touch with a CPA experienced in Cook Islands trust filings.Book a consultation Cook Islands Trust formation starting at $10,000, first-year trustee costs included.
Speak to a specialistHave questions about the tax duties tied to your trust?A private call, in which we put you in touch with a CPA experienced in Cook Islands trust filings.Book a consultation Cook Islands Trust formation starting at $10,000, first-year trustee costs included.
(Review & sourcing)
Written by
Connor Steens
BBus, business development
Reviewed by
John Evans
20+ years, offshore structuring
Last updated
17 August 2026
General information
Sourced from
IRS publications and practitioner guidance
Check the requirements as they currently stand with a qualified CPA
01IRS Form 3520 — yearly return covering dealings with foreign trusts.
02IRS Form 3520-A — yearly information return covering foreign trusts.
03FinCEN FBAR guidance — disclosure of foreign bank and financial accounts.
04IRS FATCA guidance — Foreign Account Tax Compliance Act.

The Report of Foreign Bank and Financial Accounts, lodged with FinCEN. It applies whenever a US person holds a financial interest in, or signature authority over, foreign accounts whose combined value passes $10,000 at any time in the year.

The Foreign Account Tax Compliance Act. It obliges US persons to disclose specified foreign financial assets on Form 8938 once the value crosses set thresholds. This is lodged with the personal income tax return, not with FinCEN.

Yes. These are distinct duties run by distinct agencies. Meeting one does not take care of the other.

A combined value of $10,000 across every foreign account reached at any moment in the calendar year. Even one trust account that tops this figure on a single day of the year sets off the filing duty.

$50,000 at year end for single filers, or $75,000 reached at any time in the year. The thresholds are higher for married filers and for US persons living abroad.

Electronically with FinCEN, not with the IRS. It falls due on April 15 with an automatic extension through to October 15.

For non-wilful breaches, up to $10,000 per violation. Wilful breaches carry whichever is greater of $100,000 or 50 percent of the account balance per violation, along with possible criminal prosecution.

They should. A full annual compliance package for a Cook Islands trust settlor covers Forms 3520, 3520-A, FBAR, and, where relevant, Form 8938. Make sure all four fall within scope when you engage the CPA.

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