Under Internal Revenue Code Section 1446, a partnership that earns income effectively connected with a U.S. trade or business must withhold federal tax on the share of that income allocated to any foreign partner. The rate is 21 percent for a foreign corporate partner and 37 percent for every other foreign partner, including nonresident individuals and foreign trusts.1Internal Revenue Service. Partnership Withholding The tax is paid in quarterly installments during the year and reported annually on Form 8804, with a Form 8805 issued to each foreign partner.
When the Withholding Applies
Two conditions have to be met at the same time. The partnership must have effectively connected taxable income, meaning profit tied to a trade or business carried on inside the United States. And some part of that income must be allocable to a foreign partner.2Office of the Law Revision Counsel. 26 U.S. Code 1446 – Withholding of Tax on Foreign Partners Share of Effectively Connected Income A partnership with no U.S. business income, or one whose partners are all U.S. persons, has nothing to withhold under this section.
A foreign partner is any partner that is not a United States person: a nonresident alien individual, a foreign corporation, a foreign partnership, or a foreign estate or trust.2Office of the Law Revision Counsel. 26 U.S. Code 1446 – Withholding of Tax on Foreign Partners Share of Effectively Connected Income The partnership documents each partner’s status with a W-8: Form W-8BEN-E from foreign entities, Form W-8BEN from nonresident individuals. A W-8 that a partner has already provided for chapter 3 withholding purposes will generally satisfy the Section 1446 documentation requirement as well.3Internal Revenue Service. Instructions for Form W-8BEN-E Without valid documentation, the partnership still has to withhold; it just cannot apply any reduced rate or treaty benefit the partner might have qualified for.
How the Tax Is Calculated
The partnership applies the applicable rate to each foreign partner’s allocable share of effectively connected taxable income. A foreign corporate partner is charged at 21 percent; every other foreign partner is charged at 37 percent.1Internal Revenue Service. Partnership Withholding Those rates track the top brackets of the corporate and individual schedules.
The allocable share is the portion of U.S. business profit assigned to that partner under the partnership agreement. One point that surprises people: the withholding tax is owed on income as it is earned, not on cash when it is distributed.2Office of the Law Revision Counsel. 26 U.S. Code 1446 – Withholding of Tax on Foreign Partners Share of Effectively Connected Income A foreign partner who took no distributions during the year can still have a significant withholding tax obligation assigned to them.
Reducing the Withholding
The default rates often exceed what a foreign partner would actually owe once deductions, losses, and treaty benefits are counted. The statute permits the partnership to take certain deductions and losses into account when computing the withholding amount, which lowers the tax the partnership has to remit. A foreign partner can also claim treaty benefits on Line 15 of Form W-8BEN-E by providing the required representations, which may reduce the applicable rate.3Internal Revenue Service. Instructions for Form W-8BEN-E Anything over-withheld is recovered by the partner when they file their own U.S. return and claim a credit for the tax paid on their behalf.
Forms and Identifying Information
Three IRS forms carry the compliance:
- Form 8804 is the partnership’s annual return, reporting the total Section 1446 withholding liability and serving as the transmittal for all copies of Form 8805.4Internal Revenue Service. About Form 8804, Annual Return for Partnership Withholding Tax (Section 1446)
- Form 8805 is the per-partner information statement showing each foreign partner’s share of effectively connected taxable income and the tax withheld for them.5Internal Revenue Service. Reporting and Paying Tax on Partnership Withholding
- Form 8813 is the payment voucher used to send installment payments to the Treasury during the year.5Internal Revenue Service. Reporting and Paying Tax on Partnership Withholding
Each foreign partner needs a valid U.S. taxpayer identification number on file, typically an ITIN for individuals or an EIN for entities, along with the partner’s legal name and foreign address. Those details must match the partner’s W-8 exactly. Mismatches slow down credit processing at the IRS and can leave a partner unable to claim the tax already paid on their behalf.
Payment Schedule
Section 1446 tax is paid in four installments during the partnership’s tax year. Each installment is due by the fifteenth day of the fourth, sixth, ninth, and twelfth months of that year.6Internal Revenue Service. Instructions for Form 8804-W – Installment Payments of Section 1446 Tax for Partnerships For a calendar-year partnership that is April 15, June 15, September 15, and December 15.
Payments can be submitted through the Electronic Federal Tax Payment System or by mailing Form 8813 with a check payable to the United States Treasury.6Internal Revenue Service. Instructions for Form 8804-W – Installment Payments of Section 1446 Tax for Partnerships A mailed check should carry the partnership’s EIN, the tax year, and “Form 8813” written on it.5Internal Revenue Service. Reporting and Paying Tax on Partnership Withholding
After year end, the partnership files Form 8804 and furnishes each foreign partner a copy of their Form 8805. That copy is what the partner uses to claim the credit on their own U.S. return.2Office of the Law Revision Counsel. 26 U.S. Code 1446 – Withholding of Tax on Foreign Partners Share of Effectively Connected Income Form 8805 must be delivered by the due date of the partnership return, including extensions.5Internal Revenue Service. Reporting and Paying Tax on Partnership Withholding
Penalties for Missing the Withholding
A partnership that fails to withhold and pay Section 1446 tax is liable for the full amount it should have withheld, plus interest and any applicable penalties.7eCFR. 26 CFR 1.1446(f)-5 – Liability for Failure to Withhold Underpayment of the quarterly installments can trigger the estimated-tax penalty under IRC Section 6655, which charges interest on the shortfall until it is paid. The general failure-to-pay penalty runs at 0.5 percent per month and can reach 25 percent of the unpaid amount. The penalties stack quietly, and by the time a partnership catches the problem the total often exceeds the original tax.
A Separate Rule for Sales of Partnership Interests
Section 1446(f) is a different rule and it is easy to confuse with the income withholding above. When a foreign person sells or transfers an interest in a partnership that has effectively connected income, the buyer withholds 10 percent of the amount realized on the transfer.8eCFR. 26 CFR 1.1446(f)-2 – Withholding on the Transfer of a Non-Publicly Traded Partnership Interest The buyer reports and remits using Form 8288, with Form 8288-A prepared for the transferor.9Internal Revenue Service. Form 8288, U.S. Withholding Tax Return for Certain Dispositions by Foreign Persons Several exceptions can reduce or eliminate the 10 percent, most commonly a non-foreign affidavit from the seller certifying under penalty of perjury that they are not a foreign person and providing a TIN.10Tax Notes. Final Regs Allow Six Exceptions to Section 1446(f) Withholding If the buyer fails to withhold, the partnership itself becomes responsible under Section 1446(f)(4) and reports the backup withholding in Part IV of Form 8288.
Publicly Traded and Tiered Partnerships
Two structures follow modified mechanics. A publicly traded partnership withholds on actual distributions of effectively connected income rather than on each partner’s allocable share, and the withholding responsibility typically sits with the nominee or broker holding the units for the foreign investor.1Internal Revenue Service. Partnership Withholding The nominee relies on a “qualified notice” from the partnership that identifies what portion of a distribution is effectively connected income.11Prime US REIT. Qualified Notices
When one partnership is a partner in another, look-through rules decide who withholds. If the upper-tier partnership is domestic, the lower-tier generally does not pay Section 1446 tax on the upper-tier’s share, because the upper-tier handles its own foreign partners. If the upper-tier is foreign, the lower-tier must look through to that partnership’s partners to determine their status and indirect share of effectively connected income, provided it has adequate documentation.12eCFR. 26 CFR 1.1446-5 – Tiered Partnership Structures The instructions for Forms 8804, 8805, and 8813 include a dedicated section on tiered partnerships.13Internal Revenue Service. Instructions for Forms 8804, 8805, and 8813 In fund structures where several tiers are stacked, this is one of the more common places compliance breaks down.