Key Takeaways
- Guernsey applies FATCA through an intergovernmental agreement with the US that shapes how local entities report account information.
- Entities classified as foreign financial institutions generally need a GIIN from the IRS and must report through the Guernsey Revenue Service.
- Due diligence extends beyond account holders to controlling persons, so ownership structures need careful review to identify any US connection.
- Non-compliant entities risk withholding on certain US-source payments alongside penalties, making accurate classification and reporting essential.
FATCA and What It Means for Guernsey
The Foreign Account Tax Compliance Act is a United States law that obliges financial institutions outside the US to identify accounts held by US persons and report them to the Internal Revenue Service. FATCA in Guernsey operates through an intergovernmental agreement signed with the United States, under which local institutions report to the island's Revenue Service, which then transmits the data to the IRS.
For a foreign owner, the practical effect is simple: any Guernsey bank, fund, trust company, or insurer that holds your account will check whether you or your entity has a US connection. This article explains the agreement behind that obligation, who counts as a US person, which businesses must report, and what happens when reporting fails.
It matters most to US citizens and Green Card holders banking in Guernsey, and to entities with substantial US ownership.
The US-Guernsey Intergovernmental Agreement: Model and Status
Guernsey signed a Model 1 intergovernmental agreement (IGA) with the United States on 13 December 2013. Under the Model 1 structure, financial institutions report US account information to the Guernsey Revenue Service, which passes it to the IRS on an automatic basis rather than each institution reporting to Washington directly.
The agreement rests on the existing US-Guernsey Tax Information Exchange Agreement, originally concluded at Washington on 19 September 2002 and amended by a protocol signed in London on the same December date. Exchange runs on a reciprocal footing, meaning the US shares corresponding information back, subject to the confidentiality protections in the underlying TIEA.
In domestic law, the IGA takes effect through the Income Tax (Approved International Agreements) (Implementation) (United Kingdom and United States of America) Regulations, 2014, later amended in 2015 and 2021.
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Defining a US Person Under FATCA
The IGA does not invent a separate island definition of "US person"; it adopts the definition in Article 1, which cross-references US Treasury Regulations. All US citizens qualify by default, and citizenship is not the only route in.
Green Card holders count, as do certain corporations and entities in which US taxpayers hold a substantial ownership interest. Financial institutions look for indicators of a US connection in their records, such as a US place of birth or a record of prior US residency.
Reporting reaches a wide range of holdings, including deposit accounts, custodial accounts, foreign life insurance policies, partnership interests, and stocks. The review thresholds depend on the type of holder.
| Account type | Aggregate value threshold |
|---|---|
| Individual accounts | Above US$50,000 |
| Entity accounts | Above US$250,000 |
| Enhanced review | Above US$1,000,000 |
Which Guernsey Entities Count as Foreign Financial Institutions
The IGA treats a Guernsey financial institution as one of four categories incorporated or established on the island: a depository institution, a custodial institution, an investment entity, or a specified insurance company. In everyday terms, that captures banks and deposit-takers, investment firms, insurers offering cash-value products or annuities, and trusts and companies acting in a financial capacity.
The 2021 Ordinance confirmed that registration obligations reach all relevant institutions, whether or not they actually have anything to report. Custodial institutions such as brokers, nominee companies, and clearing organisations fall in scope, as do investment entities including trusts, sponsored entities, investment advisers, managers, and collective investment vehicles.
The agreement separates Reporting Guernsey Financial Institutions, which carry active reporting duties, from Non-Reporting Guernsey Financial Institutions. Local retirement plans that provide pension benefits are treated as deemed-compliant or exempt beneficial owners, as are non-reporting institutions generally, for the purposes of the relevant US Internal Revenue Code sections.
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GIIN Registration with the IRS
A reporting institution in a Model 1 jurisdiction must register with the IRS to obtain a Global Intermediary Identification Number, known as a GIIN. Registration is completed on the IRS FATCA registration website, and on approval the institution receives its GIIN.
The IRS publishes an updated list of registered institutions and their GIINs every month. Withholding agents rely on that list to confirm an institution's status and avoid applying withholding to payments made to it.
Since Bulletin 2021/5, registration alone is not enough. Every institution operating in Guernsey, reporting or not, must also register with the Revenue Service through the IGOR portal and file an annual compliance assurance statement.
Reporting Obligations and the Role of the Guernsey Revenue Service
Guernsey's Revenue Service administers both FATCA and the Common Reporting Standard, acting as the conduit through which reporting institutions submit US account data onward to the IRS. Information on a US reportable account is reported annually, in the calendar year following the year it relates to.
For the 2025 reporting period, the deadline is 30 June 2026, and CRS reporting for the same calendar year shares that date. Submissions run through IGOR, the Revenue Service's online reporting system, for which a user guide covering CbCR, CRS, and FATCA is published on gov.gg.
Files for the 2025 FATCA reporting period must use the updated v2.0.1 XML Schema Instance Namespace at the start of the report, or the submission will fail validation.
A single missed submission can attract penalties under both the FATCA and CRS frameworks, because the same portal and deadline govern each.
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Due Diligence on Account Holders and Controlling Persons
Institutions identify US accounts using the due diligence rules in Annex I of the IGA. The process means collecting tax identification numbers and self-certification forms, then determining whether an account holder is a reportable person.
For new accounts opened on or after 1 July 2014, an institution that fails to obtain a valid self-certification within 90 days must report the account to the Revenue Service immediately, by close of business on day 91. Where a self-certification cannot be obtained, or where there are reasonable grounds to suspect it is incorrect or unreliable, the institution must notify the Revenue Service.
Records supporting due diligence must be kept for at least six years. Any change to the information held must be passed to the Revenue Service as soon as practicable, and within 14 days at most.
Withholding Exposure for Non-Compliant Entities
The enforcement teeth of FATCA is a 30% withholding tax on US-source payments to institutions that fail to register and report. That charge bites on interest, dividends, rents, royalties, and other fixed or determinable US-source income.
Ordinary commercial payments stay outside the regime. Wages, lease payments, and payments for goods are not subject to the withholding charge.
A Model 1 institution does not need to sign a separate FFI agreement with the IRS. Provided it meets its registration and reporting obligations, it is treated as compliant and escapes withholding; persistent failure, by contrast, can lead to a finding of significant non-compliance against a reporting institution.
Penalties and Consequences of FATCA Failures
Failure has two distinct fronts: the island's Revenue Service on one side and the IRS on the other. The local regime begins with a fixed penalty and escalates quickly for continued default.
| Trigger | Penalty |
|---|---|
| Report not delivered by deadline | £300 fixed penalty |
| Continued failure | £50 per day |
| Failure beyond 30 days | Up to £1,000 per day |
Beyond financial penalties, the Revenue Service may direct an institution to secure compliance, appoint independent inspectors at the institution's own expense, or freeze an account where a valid self-certification has not been provided. Obstructing the Revenue Service during a site visit can amount to a criminal offence.
On the US side, an individual who fails to file Form 8938 faces an initial penalty of $10,000, rising to $50,000 for continued failure after IRS notification. An underpayment penalty of 40% may also apply to tax owed on undeclared income from foreign financial assets.
Practical Implications for Non-Resident Owners and Advisers
Guernsey has exchanged account information internationally since FATCA began, so it functions as a fully operational automatic-exchange jurisdiction for identifying US-connected accounts. A non-resident US person opening an account at an island institution should expect a request for a TIN and self-certification at or before account opening, with the 90-day rule triggering mandatory notification if the documents do not arrive.
Even non-reporting entities carry ongoing governance duties. The compliance assurance statement filed by such institutions confirms that appropriate policies, procedures, and controls are in place for both CRS and FATCA, so a non-reporting status does not mean no obligation.
Advisers should note that the Revenue Service can run on-site inspections with seven days' written notice, or shorter with Bailiff approval, and that the cost of any inspector's report falls on the institution under investigation. The parallel FATCA and CRS regimes share one portal and one annual deadline, which means a single lapse can expose a business to penalties under both.
The IRS has extended certain FATCA compliance relief for foreign institutions through 2027, easing immediate penalties for those that show a good-faith effort and need more time to build the required systems.
Conclusion
FATCA is a settled, working obligation in Guernsey, built on the 2013 Model 1 agreement and run day to day by the Revenue Service through the IGOR portal. For a foreign owner, the headline is that any US connection in your ownership or your personal status will be detected and reported, and that documentation requested at account opening should be supplied promptly. The dual FATCA and CRS framework means the same deadlines and the same penalties cover both, so accurate self-certification and timely filing protect you on every side. Where US-person status is in play, coordinated advice on both the island and US obligations is the sensible course.
How Expanship Can Help Your Business in Guernsey
Expanship supports foreign-owned entities in meeting FATCA obligations in Guernsey, from determining whether a structure is a reporting or non-reporting institution to managing IGOR registration, self-certification collection, and the annual filing cycle. The same team handles the broader requirements of running a compliant business on the island.
- Company incorporation and structuring
- Registered agent and registered office services
- Tax registration and annual filing
- Ongoing compliance management, including FATCA and CRS
- Accounting and bookkeeping
- Introductions to banking providers
To discuss your requirements, contact Expanship Guernsey.
Frequently Asked Questions
Yes. Guernsey signed a Model 1 IGA with the United States in 2013, and financial institutions on the island must identify and report accounts held by US persons to the Revenue Service, which forwards the data to the IRS. Entities that are not financial institutions are not reporters but may still be asked to self-certify their status.
If you are a US person, the institution will request a TIN and a self-certification form, usually at or before account opening. For accounts opened on or after 1 July 2014, failure to provide a valid self-certification within 90 days obliges the institution to report the account to the Revenue Service by day 91.
Reporting is annual, in the calendar year after the year the information relates to. For the 2025 reporting period, the deadline is 30 June 2026, the same date that applies to CRS reporting for the 2025 calendar year.
The Revenue Service issues a fixed £300 penalty for a report not delivered on time, followed by daily penalties of £50 that can escalate to up to £1,000 per day after 30 days. The same lapse can trigger penalties under both FATCA and CRS, since they share one portal and one deadline.
Yes. Since Bulletin 2021/5, all financial institutions on the island, whether or not they have a reporting obligation, must register through IGOR and submit an annual compliance assurance statement confirming that appropriate FATCA and CRS controls are in place.
It is a US charge of 30% on US-source income such as interest, dividends, rents, and royalties paid to a foreign institution that fails to register and report. A Guernsey institution that meets its registration and reporting obligations under the Model 1 agreement is treated as compliant and avoids this withholding.
Legal Disclaimer
The information provided in this article is for general informational purposes only and does not constitute legal, tax, or professional advice. While we strive to ensure the accuracy and timeliness of the content, laws and regulations are subject to change, and the application of laws can vary widely based on specific facts and circumstances.
Readers should not act upon this information without seeking professional counsel tailored to their individual situation. Expanship and its authors disclaim any liability for actions taken or not taken based on the content of this article.
For specific advice regarding your business setup, compliance requirements, or any legal matters, please consult with qualified legal and tax professionals in the relevant jurisdiction.
