WP & WT withholding agreements — requirements for foreign partnerships and trusts

The U.S. withholding framework allows certain foreign partnerships and foreign trusts to enter into formal agreements with the IRS and assume withholding and reporting responsibilities for U.S.-source income paid to their partners, owners or beneficiaries.

These entities are known as Withholding Foreign Partnerships (WPs) and Withholding Foreign Trusts (WTs). The WP/WT regime is part of the broader QI, Chapter 3 and Chapter 4 withholding framework and should be distinguished from foreign-trust information reporting under Forms 3520 and 3520-A.

1) What is a Withholding Foreign Partnership (WP)?

A Withholding Foreign Partnership is a foreign partnership that has entered into a WP withholding agreement with the IRS and is acting in that capacity.

In general, the WP assumes withholding and reporting responsibility for certain U.S.-source amounts distributed to, or included in the distributive shares of, its direct partners.

2) What is a Withholding Foreign Trust (WT)?

A Withholding Foreign Trust is a foreign simple trust or grantor trust that has entered into a WT withholding agreement with the IRS and is acting in that capacity with respect to its owners or beneficiaries.

The WT assumes primary Chapter 3 and Chapter 4 withholding responsibility for relevant amounts distributed to, or treated as belonging to, its direct owners or beneficiaries within the scope of the WT agreement.

3) WP, WT and QI — how they differ

All three regimes are administered within the IRS Qualified Intermediary Program and use the QAAMS platform for application and account management.

4) What responsibilities does a WP or WT assume?

A WP or WT generally assumes primary withholding responsibility under Chapter 3 and Chapter 4 (FATCA) for payments within the scope of the agreement.

• determine the relevant status of partners, owners or beneficiaries;
• obtain and maintain required documentation;
• apply appropriate U.S. withholding rates;
• deposit tax withheld where required;
• prepare required Forms 1042 and 1042-S;
• maintain books, records and supporting evidence;
• comply with FATCA requirements applicable to the entity; and
• comply with the certification and compliance requirements of the WP/WT agreement.

5) Form W-8IMY — the key upstream document

A WP or WT documents its status to an upstream withholding agent using Form W-8IMY.

The form represents that the entity is acting as a WP or WT and identifies its applicable withholding status. It must include the special WP-EIN or WT-EIN assigned for use when the entity acts in that capacity.

6) Why WP/WT can simplify upstream documentation

One of the principal operational benefits of WP/WT status is that the upstream withholding agent may generally treat the WP or WT as the payee for amounts for which it acts in that capacity.

The WP/WT withholding statement does not generally need to disclose the identity of each direct partner, beneficiary or owner to the upstream withholding agent for those amounts.

7) When is a WP or WT not acting in that capacity?

WP or WT status does not necessarily apply to every amount received by the entity. A WP or WT can receive payments for which it is not acting as WP or WT.

For those payments, the entity may instead be treated as a nonwithholding foreign partnership or nonwithholding foreign trust, and the upstream withholding agent may need to look through to underlying persons.

8) WP/WT and FATCA

WP or WT status does not replace FATCA classification or registration requirements.

If the foreign partnership or trust is also an FFI, it must have an appropriate Chapter 4 status. Depending on its classification, this can also require FATCA registration and a GIIN.

9) Form 1042 and Form 1042-S reporting

A WP or WT acting as a withholding agent can have its own Form 1042 and Form 1042-S filing responsibilities.

For example, IRS guidance states that a WP must file Forms 1042-S and Form 1042 for amounts subject to withholding paid through the WP, even where no tax was ultimately withheld in a particular case.

The exact reporting method depends on the agreement, payment type, partner population and any reporting elections made by the WP or WT.

10) Application through QAAMS

Applications for WP or WT status are managed through the IRS Qualified Intermediary, Withholding Foreign Partnership and Withholding Foreign Trust Application and Account Management System (QAAMS).

The IRS expects applicants to demonstrate that they have the resources, policies and procedures necessary to comply with the applicable withholding agreement.

1. Determine eligibility: confirm that the foreign entity is an eligible foreign partnership, simple trust or grantor trust.
2. Review Chapter 4 status: determine whether FATCA registration or GIIN requirements apply.
3. Prepare QAAMS application: establish the entity's WP/WT application account and provide the required information.
4. Obtain WP-EIN or WT-EIN: the special EIN is used when acting in WP/WT capacity.
5. Implement operating procedures: establish documentation, withholding, reporting and reconciliation controls.
6. Maintain agreement compliance: manage certifications, changes and renewals through QAAMS.

11) Certification and compliance framework

WP and WT status creates an ongoing compliance framework rather than a one-time application.

The IRS Qualified Intermediary Program administers the application, renewal, certification and termination of WP and WT agreements through QAAMS.

• documented responsible-person / compliance ownership;
• written withholding and documentation procedures;
• controls over W-8 documentation;
• payment and withholding reconciliations;
• Forms 1042 / 1042-S reporting controls;
• Chapter 4 / FATCA controls where applicable;
• exception and remediation processes; and
• periodic certification requirements under the agreement.

12) WP/WT vs. Forms 3520 and 3520-A

These regimes are frequently confused because both can involve foreign trusts, but they serve entirely different purposes.

13) When can WP or WT status be useful?

WP/WT status is most useful where a foreign flow-through entity receives recurring U.S.-source income for a population of partners, owners or beneficiaries and wants to centralize the withholding process.

The decision should therefore be based on transaction volume, investor population, custody arrangements and the entity's ability to operate a reliable U.S. withholding framework.

14) Implementation checklist

• entity eligibility and U.S. tax classification analysis;
• WP vs. WT applicability;
• FATCA / Chapter 4 classification and GIIN review;
• QAAMS application;
• WP-EIN or WT-EIN setup;
• Form W-8IMY and withholding statement procedures;
• partner / owner / beneficiary documentation procedures;
• income and withholding rate mapping;
• tax deposit process;
• Form 1042 / 1042-S procedures;
• annual reconciliations;
• compliance and certification calendar; and
• evidence retention and remediation process.

15) Outsourcing WP/WT implementation and compliance

A foreign partnership, trustee or fiduciary does not necessarily need to build a dedicated U.S. withholding team internally.

The technical and operational U.S. tax layer can be supported externally while the entity retains responsibility for its underlying partnership or trust administration.

16) Key U.S. authorities

• IRS — Withholding Foreign Partnership and Foreign Trust — overview of WP and WT status, EINs, documentation and withholding responsibilities.
• Revenue Procedure 2017-21 — WP and WT agreements and application framework.
• IRS Instructions for Form W-8IMY — certification of WP/WT status and withholding statement requirements.
• IRS — Qualified Intermediary Program — QI, WP and WT agreements and program administration.
• IRS — Apply, renew, certify or terminate QI/WP/WT status — QAAMS application and account-management procedures.

Related reading

• QI & U.S. Withholding
• Foreign Grantor Trust reporting — Form 3520-A & U.S. owner statements
• Form 3520 support — information packages for U.S. owners and beneficiaries
• FATCA for Foreign Banks — Operating Model & Reporting