Form W-8IMY Instructions: Classification and Withholding Statement

Form W-8IMY is the certificate a foreign intermediary, flow-through entity, or certain U.S. branch gives to a U.S. withholding agent to establish foreign status and transmit documentation about the people who actually receive the income. To complete it correctly, you pick your Chapter 3 classification in Part I, fill in identification and FATCA status in Part II, complete only the certification part that matches your classification, and attach a withholding statement together with the underlying beneficial owner forms. The form is handed to the withholding agent, not filed with the IRS.¹ Errors carry a real price: incomplete documentation triggers a flat 30% withholding rate on payments passing through.

Who Should Use This Form

Form W-8IMY is for entities that receive U.S.-source income on behalf of others rather than for their own account. The IRS lists the eligible filers as Qualified Intermediaries, Non-Qualified Intermediaries, Withholding Foreign Partnerships, Withholding Foreign Trusts, foreign flow-through entities, and certain U.S. branches of foreign banks or insurance companies.²

If your entity is the beneficial owner of the income, W-8IMY is the wrong form. Foreign individuals use W-8BEN, foreign beneficial owner entities use W-8BEN-E, entities with income effectively connected with a U.S. trade or business use W-8ECI, and foreign governments and tax-exempt organizations use W-8EXP. W-8IMY is the only certificate in the family that says “look through me to the real recipients.”

Choosing Your Chapter 3 Classification in Part I

Part I asks you to select a classification under Chapter 3 of the Internal Revenue Code, which governs withholding on payments to foreign persons.³ The box you check determines which certification part you complete, what documentation you attach, and how the withholding agent treats your payees.

Qualified Intermediary

A Qualified Intermediary is a foreign entity that has signed an agreement with the IRS to take on primary withholding and reporting responsibilities for U.S.-source payments flowing through it.⁴ The current agreement is governed by Rev. Proc. 2022-43, effective January 1, 2023.⁵ QI status lets you give the withholding agent pooled information grouped by withholding rate and income type instead of individual documentation for every account holder. A withholding rate pool is a single income type subject to a single rate.⁶

Non-Qualified Intermediary

A Non-Qualified Intermediary is any foreign intermediary that has not entered into a QI agreement. The withholding agent must look through the NQI to the underlying beneficial owners to set the correct rate for each one, and the NQI must transmit individual withholding certificates plus a detailed withholding statement identifying every payee.⁷ The pool shortcut is not available.

Withholding Foreign Partnership or Trust

Withholding Foreign Partnerships and Withholding Foreign Trusts operate like QIs. They hold their own IRS agreements, assume primary withholding responsibility for their partners or beneficiaries, and can use pool reporting. If your foreign partnership or trust has not entered into such an agreement, check the flow-through entity box instead. The withholding agent will then treat each partner or beneficiary as a separate payee and expect documentation for each.

U.S. Branch of a Foreign Bank or Insurance Company

A U.S. branch of a foreign bank or foreign insurance company has two paths. It can agree with the withholding agent to be treated as a U.S. person, taking on Chapter 3 withholding, Chapter 4 withholding, and Form 1099 reporting and backup withholding on downstream payments. Or it can certify that it is not being treated as a U.S. person, which puts it in an NQI-like posture and requires it to transmit individual payee documentation with a withholding statement.¹ A branch that agrees to be treated as a U.S. person must provide its EIN and does not need to report a Chapter 4 status or GIIN.

Identification and FATCA Status in Part II

Part II asks for your entity’s legal name, permanent residence address, and mailing address if different. Withholding Foreign Partnerships and Withholding Foreign Trusts must supply the EIN issued under their IRS agreement. If your entity claims treaty benefits or has a FATCA reporting obligation, provide a Foreign Tax Identifying Number.

Foreign Financial Institutions must select their Chapter 4 status in Part II, such as Participating FFI, Reporting Model 1 FFI, or Registered Deemed-Compliant FFI. The selection must match how the institution registered with the IRS for FATCA, because the withholding agent will verify it. Participating FFIs and certain other registered institutions receive a Global Intermediary Identification Number (GIIN) at registration. The IRS publishes a searchable list of registered FFIs and their GIINs, updated monthly, which withholding agents use to confirm a GIIN is valid.⁸

Unregistered FFIs face a 30% withholding tax on withholdable payments under section 1471, even where the ultimate beneficial owners would otherwise qualify for a reduced rate or exemption.⁹¹⁰ That penalty applies whether the FFI is acting as an intermediary or as a flow-through entity.

Completing the Certification That Matches Your Classification

Only one entity-specific certification part applies to your form. Skip the others.

Part III for Qualified Intermediaries

A QI checks line 14 to certify it is acting as a QI for the payments associated with the form. It then indicates whether it has assumed primary withholding responsibility under Chapter 3 and Chapter 4. A QI that assumes primary responsibility effectively steps into the withholding agent’s shoes: the upstream payer can treat the QI as the payee and rely on it to withhold and report.¹ Additional lines cover whether the QI has assumed primary Form 1099 reporting and backup withholding responsibility, whether it acts as a Qualified Derivatives Dealer, and whether it has taken on withholding responsibility for dispositions of publicly traded partnership interests under section 1446(f).¹¹

Part IV for Withholding Foreign Partnerships and Trusts

WPs and WTs make parallel certifications in Part IV, confirming they hold their own IRS agreement and are assuming the corresponding withholding responsibilities for their partners or beneficiaries.

Part XIX for U.S. Branches

U.S. branches complete Part XIX. The key line is whether the branch agrees to be treated as a U.S. person. That choice governs which side of the withholding responsibility line the branch sits on and what documentation the withholding agent will expect.

Building the Withholding Statement

The withholding statement is what makes the W-8IMY functional. Without it, the form is a cover page with no actionable information. The statement is a separate document attached to the form that tells the withholding agent who the payees are and how to allocate each payment among them.

NQI Requirements

For Non-Qualified Intermediaries, the withholding statement must include:⁷

Name, address, and TIN (if any) of each person for whom documentation is provided
Whether each payee provided a W-8 series form, a W-9, or documentary evidence
Whether each person is a U.S. exempt recipient, U.S. non-exempt recipient, foreign beneficial owner, or another intermediary or flow-through entity
The Chapter 3 and Chapter 4 status codes used on Form 1042-S for each payee
How each payment breaks down by income type and payee
The withholding rate applicable to each foreign payee
Country of residence for each foreign payee
If claiming a reduced rate, the specific grounds (such as portfolio interest or a treaty provision) and any required limitation-on-benefits certifications for entity payees

The statement must be updated before each payment to keep the information current. Every time the client base changes or a payee is added, the statement needs revision.

The Alternative Procedure

An NQI can use an alternative procedure that relaxes the timing for some of this information. The NQI gives the withholding agent estimated withholding rate pool information before payment, then has until January 31 following the calendar year of payment to supply the final payee-specific allocation.⁷ Two conditions apply: the NQI must disclose on its withholding statement that it is using the alternative procedure, and it must get the withholding agent’s consent. The alternative procedure is not available for payments to U.S. non-exempt recipients; allocation information for those payees must always be provided before payment.

QI Pool Reporting

A QI that has assumed primary withholding responsibility does not pass through individual payee documentation. The QI’s withholding statement groups payees into withholding rate pools, each pool representing a single income type at a single rate.⁶ The QI certifies it holds valid documentation for the payees in each pool and handles the withholding itself.

Attaching the Underlying Forms

W-8IMY serves as the transmittal vehicle for W-8BEN forms from foreign individual payees, W-8BEN-E forms from foreign entity payees, W-9 forms from U.S. payees, and any other documentation establishing the status of the ultimate recipients. NQIs and flow-through entities must attach these forms directly. QIs, WPs, and WTs retain the underlying forms themselves but must be able to produce them on demand.

Signing and Delivering the Form

An authorized representative, typically an officer, trustee, or authorized agent, must sign the form under penalties of perjury. The signature confirms that the information and certifications are true, correct, and complete. Electronic signatures are permitted if the withholding agent allows them, but simply typing a name into the signature line does not qualify. An acceptable electronic signature includes indicators like a time and date stamp and a statement confirming the form was electronically signed by an authorized person.¹

You do not send Form W-8IMY to the IRS. Give it to the withholding agent from whom your entity receives payments.¹ The agent keeps it as part of its records supporting the withholding rates applied.

How Long the Form Stays Valid

Unlike most other W-8 forms, Form W-8IMY itself has an indefinite validity period. It does not expire at the end of the third calendar year. It remains valid as long as the entity’s status and the information on the certificate stay correct.¹² The underlying documentation attached to the form has its own expiration rules, though. A W-8BEN, for example, generally does expire at the end of the third calendar year, so the associated documentation still needs to be kept current even while the W-8IMY continues to sit valid on file.

If a change in circumstances makes any information on the form incorrect, for Chapter 3 or Chapter 4 purposes, notify the withholding agent within 30 days and provide updated documentation.¹ Examples include a shift in the entity’s FATCA classification, a change in the jurisdiction where the entity is organized, or a jurisdiction being removed from the IRS list of countries treated as having an intergovernmental agreement in effect. Missing the 30-day window can cause the withholding agent to apply default withholding rates on all subsequent payments until valid documentation is restored.

When Documentation Is Missing or Invalid

Incomplete or missing documentation triggers the IRS presumption rules. When a withholding agent cannot reliably associate a payment with valid documentation from a specific payee, the agent must presume the payee is a nonparticipating FFI and withhold at 30% for Chapter 4 purposes.¹³ No treaty rate and no statutory exemption such as portfolio interest is available under presumption; those benefits require valid documentation.

For an NQI using the alternative procedure, failing to provide the final payee-specific allocation by January 31 means the withholding agent must stop using the alternative procedure entirely for that NQI’s payments going forward.⁷ A documentation failure at the intermediary level cascades: beneficial owners who provided perfectly valid W-8BEN forms can still get hit with 30% withholding because the intermediary between them and the withholding agent did not do its job.

The perjury declaration on the form is not ceremonial. Willfully signing a document containing a declaration under penalties of perjury while knowing the information is false is a felony carrying fines up to $100,000 for individuals or $500,000 for corporations, imprisonment of up to three years, or both. Aiding or advising in the preparation of a fraudulent form carries the same penalties.¹⁴

Keeping Records

Both the intermediary and the withholding agent must retain the W-8IMY and all supporting documentation, including the underlying beneficial owner forms and withholding statements, for as long as those records may be relevant to determining the correct withholding. As a practical matter, plan on retaining records at least as long as the IRS can assess additional tax, which in most withholding situations runs several years past the last year a payment was made in reliance on the form.

1
Internal Revenue Service. Instructions for Form W-8IMY
2
Internal Revenue Service. Form W-8IMY, Certificate of Foreign Intermediary, Foreign Flow-Through Entity, or Certain U.S. Branches for United States Tax Withholding
3
Office of the Law Revision Counsel. 26 U.S. Code 1441 – Withholding of Tax on Nonresident Aliens
4
Internal Revenue Service. Miscellaneous Qualified Intermediary Information
5
Internal Revenue Service. 2023 Qualified Intermediary Agreement
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Internal Revenue Service. Payments to Qualified Intermediaries
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Internal Revenue Service. Payments to Nonqualified Intermediaries
8
Internal Revenue Service. FATCA Foreign Financial Institution (FFI) List Search and Download Tool
9
Internal Revenue Service. Information for Foreign Financial Institutions
10
Office of the Law Revision Counsel. 26 U.S. Code 1471 – Withholdable Payments to Foreign Financial Institutions
11
Office of the Law Revision Counsel. 26 U.S. Code 1446 – Withholding of Tax on Foreign Partners’ Share of Effectively Connected Income
12
Internal Revenue Service. Instructions for Form W-8IMY (10/2021)
13
Internal Revenue Service. Presumption Rules
14
Office of the Law Revision Counsel. 26 U.S. Code 7206 – Fraud and False Statements