FBAR and FATCA for Cook Islands trust accounts

Written and reviewed by Connor SteensJohn Evans
Updated
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

The Report of Foreign Bank and Financial Accounts, FinCEN Form 114, must be filed by a US person who has a financial interest in or signature authority over one or more foreign financial accounts with an aggregate value exceeding $10,000 at any point during the calendar year. A Cook Islands trust account held by a US grantor trust owner qualifies. The FBAR is filed electronically with the Financial Crimes Enforcement Network, not with the IRS. It is due by April 15, with an automatic extension to October 15.

The financial interest standard is broader than direct ownership. A US person has a financial interest in a foreign account if they are the owner of record or have legal title, or if another person holds the account for the benefit of the US person. A grantor trust settlor who is treated as the owner of the trust has a financial interest in the trust's foreign accounts for FBAR purposes.

What FATCA requires

The Foreign Account Tax Compliance Act requires US persons to report specified foreign financial assets on Form 8938, Statement of Specified Foreign Financial Assets, filed with the personal income tax return. The reporting thresholds are higher than for FBAR: $50,000 for a single filer at year end or $75,000 at any point during the year, with higher thresholds for married filers and US persons living abroad.

A Cook Islands trust is a specified foreign financial asset for FATCA purposes if the settlor is treated as the owner of the trust under the grantor trust rules. The value reported is the trust's asset value. Where both FBAR and Form 8938 reporting is required for the same account, both must be filed. Filing one does not satisfy the obligation to file the other.

How they interact

FBAR and FATCA are parallel regimes with different administering agencies, different forms, different thresholds, and different penalty structures. FBAR applies at a lower threshold ($10,000) and is filed with FinCEN. FATCA applies at a higher threshold ($50,000 and above) and is filed with the IRS. Both apply to the same underlying Cook Islands trust accounts. A CPA preparing foreign trust filings handles both alongside Forms 3520 and 3520-A as part of a complete annual compliance package.

The penalty regimes

FBAR penalties for non-wilful violations are up to $10,000 per violation. Wilful violations carry the greater of $100,000 or 50 percent of the account balance per violation, and can result in criminal prosecution. Courts have held that each year of non-filing is a separate violation, so a multi-year failure to file FBAR on a substantial account can produce total penalties that far exceed the account value.

FATCA Form 8938 penalties start at $10,000 for failure to disclose and increase by $10,000 for each 30-day period of continued non-disclosure after IRS notification, up to $50,000. An additional penalty of 40 percent of the underpayment attributable to undisclosed foreign financial assets applies where tax is underpaid as a result of the non-disclosure.

General information only. FBAR and FATCA rules are complex and penalties are severe. Confirm your specific obligations with a CPA and if wilful non-compliance is a concern, with a tax attorney as well.

Speak to a specialistQuestions about tax obligations for your trust?A confidential call — we will connect you with a CPA with Cook Islands trust filing experience.Book a consultation Cook Islands Trust formation from $10,000, inclusive of first-year trustee costs.
Speak to a specialistQuestions about tax obligations for your trust?A confidential call — we will connect you with a CPA with Cook Islands trust filing experience.Book a consultation Cook Islands Trust formation from $10,000, inclusive of first-year trustee costs.
(Review & sourcing)
Written by
Connor Steens
BBus, business development
Reviewed by
John Evans
20+ years, offshore structuring
Last updated
3 August 2026
General information
Sourced from
IRS publications and practitioner guidance
Confirm current requirements with a qualified CPA
01IRS Form 3520 — annual return for transactions with foreign trusts.
02IRS Form 3520-A — annual information return for foreign trusts.
03FinCEN FBAR guidance — reporting of foreign bank and financial accounts.
04IRS FATCA guidance — Foreign Account Tax Compliance Act.

The Report of Foreign Bank and Financial Accounts, filed with FinCEN. Required when a US person has a financial interest in or signature authority over foreign accounts with an aggregate value exceeding $10,000 at any point during the year.

The Foreign Account Tax Compliance Act. Requires US persons to report specified foreign financial assets on Form 8938 when the value exceeds defined thresholds. Filed with the personal income tax return, not with FinCEN.

Yes. They are separate obligations administered by separate agencies. Filing one does not satisfy the other.

$10,000 aggregate value across all foreign accounts at any point during the calendar year. A single trust account exceeding this amount at any day in the year triggers the filing obligation.

$50,000 for single filers at year end, or $75,000 at any point during the year. Higher thresholds apply for married filers and US persons abroad.

With FinCEN electronically, not with the IRS. Due by April 15 with an automatic extension to October 15.

Up to $10,000 per violation for non-wilful violations. Wilful violations carry the greater of $100,000 or 50 percent of the account balance per violation, plus potential criminal prosecution.

They should. A complete annual compliance package for a Cook Islands trust settlor includes Forms 3520, 3520-A, FBAR, and Form 8938 where applicable. Confirm all four are in scope when engaging the CPA.

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