A Global Intermediary Identification Number (GIIN) is a 19-character unique identifier issued by the United States Internal Revenue Service (IRS) to Foreign Financial Institutions (FFIs) that register on the IRS FATCA Registration Portal. A Cayman Islands fund classified as a Reporting Foreign Financial Institution under the FATCA framework, which includes most investment funds, hedge funds, and private equity structures, is required to obtain a GIIN, and must ensure that GIIN appears on the IRS-published monthly FFI List. A fund whose GIIN does not appear on that list risks having 30% withheld on US-source withholdable payments by US withholding agents.
What does a GIIN look like?
A GIIN consists of 19 characters in the format XXXXXX.XXXXX.XX.XXX, divided into four parts separated by periods: (1) a six-character FATCA ID assigned by the IRS (randomly generated, upper-case letters excluding O, or numbers); (2) a five-character Financial Institution type code (99999 for a single standalone entity); (3) a two-character category code; and (4) a three-character country identifier.
The country identifier is the ISO 3166-1 numeric standard country code: for Cayman Islands entities this is 136 (not the alpha-3 code CYM).
The two-character category codes are: SL (Single — a standalone FI not part of an expanded affiliated group), LE (Lead FI of an expanded affiliated group), ME (Member of an affiliated group), BR (Branch), and SP (Sponsoring Entity).
A typical standalone Cayman fund will have SL as its category code, giving a GIIN ending in .SL.136.
The GIIN is publicly verifiable: anyone can search the IRS FFI List (updated monthly) to confirm a given GIIN is active and belongs to the named entity.
Which Cayman funds need a GIIN?
Any Cayman Islands entity classified as a Reporting FFI under FATCA must register with the IRS and obtain a GIIN. In the fund context, this includes: hedge funds and other open-ended investment funds registered or operating in the Cayman Islands; private equity funds, venture capital funds, and similar closed-ended structures; feeder funds and master fund entities in master-feeder structures; and fund of funds. Each entity in a structure typically needs its own GIIN so, in a master-feeder arrangement, both the master fund and each feeder fund will ordinarily need to register separately. Certain SPVs that meet the definition of an Investment Entity may also need their own GIINs depending on their classification.
Which Cayman funds do not need a GIIN?
A Cayman Islands entity does not need a GIIN if it falls outside the definition of an FFI (i.e., it is an NFFE), or if it qualifies as a Non-Reporting FFI under Annex II of the Cayman-US IGA. Non-Reporting categories that may apply in a fund context include: certain exempt collective investment vehicles; trustee-documented trusts where the trustee is a Reporting FFI; owner-documented FFIs; and restricted funds. Entities qualifying for an exemption should maintain documentary evidence of their classification and will typically provide a self-certification of exempt status to withholding agents.
How to register for a GIIN
GIIN registration is completed through the IRS FATCA Online Registration System at irs.gov/fatca-registration. The registration process requires the entity to provide basic identifying information, confirm its FATCA classification, and designate a Responsible Officer and points of contact. Once approved, the GIIN is issued and the entity appears on the next monthly FFI List publication. Registration is free of charge. There is no equivalent IRS registration requirement under CRS.
Maintaining GIIN validity
Once registered, an entity must keep its FATCA registration information current. Changes to the entity’s name, responsible officer, or structure should be updated on the IRS FATCA Registration Portal promptly. If a registered entity ceases operations, is liquidated, or changes its FATCA classification, the registration should be terminated or updated. The IRS may suspend or remove an entity from the FFI List if annual certifications are not filed on time or if the IRS determines the entity is non-compliant. An entity removed from the FFI List is treated as a non-compliant FFI by withholding agents, triggering 30% withholding risk.
GIIN and annual certifications
In addition to initial registration, Responsible Officers of Cayman Islands Reporting FFIs are required to submit periodic certifications of compliance (FATCA certifications or RO certifications). These certifications confirm that the entity has established the required FATCA compliance programme. Certification periods and deadlines are set by the IRS and typically fall every three years. Failure to submit certifications on time can result in removal from the FFI List.
At wb.group, we assist Cayman Islands fund managers with GIIN registration, IRS portal maintenance, and annual FATCA compliance.
Related questions: What FATCA obligations apply to a Cayman Islands fund or company? | What is the difference between FATCA and CRS? | What is a Reporting Financial Institution under the Cayman Islands CRS regime?
FAQs
Generally yes. Each separate legal entity classified as a Reporting FFI in a fund structure needs its own GIIN. In a master-feeder structure, both the master fund and each feeder fund will typically need to register separately and obtain individual GIINs. However, certain sponsored entities may be able to rely on their sponsoring entity’s registration in limited circumstances, in which case the sponsor registers with an SP category code.
No. Registration on the IRS FATCA Online Registration System and the issuance of a GIIN are free of charge. The IRS does not charge a registration or renewal fee for FATCA compliance purposes.
If a Cayman fund’s GIIN does not appear on the current IRS FFI List, US withholding agents are entitled to treat payments to the fund as made to a non-compliant FFI and withhold 30% on US-source withholdable payments. The IRS updates the FFI List monthly, so a recently registered fund may not appear immediately: entities should allow time for the list to update before expecting withholding agents to recognise the GIIN.