CRS reporting and your Cook Islands trust

What CRS is

Built by the OECD, the Common Reporting Standard is a framework through which tax authorities automatically swap details of financial accounts. More than a hundred jurisdictions take part, the Cook Islands among them. Every member jurisdiction obliges its financial institutions to flag accounts belonging to residents of other member jurisdictions and pass that data to their own tax authority, which in turn hands it automatically to the tax authorities in the account holders' home countries.

Having signed on to the CRS automatic exchange framework, the Cook Islands imposes reporting duties on its banks and other financial institutions, including any that hold Cook Islands trust accounts. Where the settlor is a US person, that trust account data goes to the Cook Islands FSC, which passes it along to the IRS.

What is reported

Under CRS, what gets reported includes the account holder's name and tax identification number, the country where they are tax-resident, the account number, the year-end balance or value of the account, and the income posted to it over the year — interest, dividends, gross sale proceeds, and any other income. When a Cook Islands trust account has the settlor as the reportable person, the practical effect is that the IRS learns each year that the trust account exists, what it holds, and what income it earned.

Reporting happens per account, not per trust. If a single trust holds accounts across several institutions, each institution files its own separate CRS report. What reaches the IRS via CRS does not mirror the contents of Forms 3520 and 3520-A word for word, yet it concerns the same accounts and the same transactions. Where CRS figures and voluntarily submitted forms fail to line up, the IRS can see it.

What the IRS receives

Once the CRS data lands, the IRS is able to cross-check it against whatever Forms 3520 and 3520-A the settlor has filed. If a trust never appears on the Forms yet shows up in the CRS feed, that gap is something the IRS can spot. Likewise, if the figures declared on the Forms diverge from the account balances reported through CRS, that too is a mismatch. Neither outcome bodes well for the person filing.

For this reason, complying voluntarily is more than a sensible suggestion. Once the trust account is open and CRS reporting has begun, it is the only defensible stance. The account details will reach the IRS regardless. All that remains uncertain is whether the settlor's own filings square with what automatic exchange has already delivered to the IRS.

Why this matters for compliance

With CRS in place, quietly holding an undisclosed offshore trust account is no longer realistic. Anyone who assumed the Cook Islands' trust confidentiality rules would keep their account details from the IRS has it wrong. Under Cook Islands law, confidentiality simply keeps the trust's terms out of public view. It does nothing to hide the account from tax authorities who are entitled to the data through CRS. These are two wholly separate regimes tackling two wholly separate questions.

In practice the takeaway is simple: submit Forms 3520 and 3520-A each year, lodge FBAR and Form 8938 wherever they apply, and make sure the figures you report align with the trust accounts the IRS is already seeing through CRS. A CPA experienced with Cook Islands trusts manages the whole thing within a single integrated yearly compliance package.

For general guidance only. CRS reporting keeps changing, and the Cook Islands has revised its own implementation since it first adopted the standard. Verify what currently applies with a CPA versed in international tax reporting.