A 1446(f) certificate is the document a seller of a U.S. partnership interest gives the buyer or broker to prove they are not a foreign person, so that no 10 percent withholding has to come out of the sale proceeds. Without it, the withholding agent has no choice: Section 1446(f) requires them to hold back 10 percent of the amount realized and send it to the IRS. Get the certificate in hand before the transfer closes, make sure it contains everything the regulations require, and keep it on file. That is the whole job.
When You Actually Need One
The requirement is triggered by a transfer of an interest in any partnership engaged in a U.S. trade or business, not only publicly traded partnerships. A “transfer” is defined broadly and reaches sales, exchanges, distributions, gifts, and other dispositions. The withholding turns on the structure of the transaction, not the seller’s intent, so transactions that don’t look like a traditional sale can still trigger it.1Office of the Law Revision Counsel. 26 USC 1446 – Withholding of Tax on Foreign Partners Share of Effectively Connected Income
The statute sets a simple default. If the transferor does not furnish an affidavit stating, under penalties of perjury, their U.S. taxpayer identification number and that they are not a foreign person, the withholding agent must withhold.1Office of the Law Revision Counsel. 26 USC 1446 – Withholding of Tax on Foreign Partners Share of Effectively Connected Income No certificate means the seller is treated as foreign.
Timing is not flexible. For transfers of non-publicly traded partnership interests, the transferee must have the certification before the transfer date. A certificate produced after closing cannot retroactively excuse a failure to withhold. For publicly traded partnership (PTP) interests, the broker must have the documentation before paying out the proceeds. Most brokerage accounts collect this at account opening, which is why routine U.S. investors rarely see the process.2eCFR. 26 CFR 1.1446(f)-2 – Withholding on the Transfer of a Non-Publicly Traded Partnership Interest
The requirement bites hardest in private transfers of non-PTP interests, where there is no institutional intermediary with documentation already on file. If you are buying out a partner, receiving a partnership interest in a private transaction, or otherwise dealing outside a broker relationship, expect to collect the certificate yourself.
What the Certificate Must Contain
The regulations set out specific content requirements. A valid certification of non-foreign status must include:
- The transferor’s name
- The transferor’s U.S. taxpayer identification number (Social Security number for individuals, EIN for entities)
- The transferor’s address
- A statement that the transferor is not a foreign person
- A signature under penalties of perjury
A missing or incorrect TIN invalidates the entire certification.3eCFR. 26 CFR 1.1446(f)-2 – Withholding on the Transfer of a Non-Publicly Traded Partnership Interest – Section: (b)(2) Certification of Non-Foreign Status by Transferor
There is no special IRS form. The regulations explicitly recognize a valid Form W-9 (Request for Taxpayer Identification Number and Certification) as satisfying the non-foreign status certification requirement for both PTP and non-PTP transfers. For PTP transfers, the regulation defines a “certification of non-foreign status” as a Form W-9 or valid substitute form.4eCFR. 26 CFR 1.1446(f)-4 – Withholding on the Transfer of a Publicly Traded Partnership Interest A transferee can rely on a Form W-9 already on file from the transferor, as long as the form meets the requirements.
Many brokers and financial institutions use proprietary forms that incorporate the same mandatory language. Whether the document is a W-9, a custom form, or a plain written statement, the required elements are the same. Skip any one of them and the document does not stop the withholding.
What Counts as a Transfer and the 10 Percent
The 10 percent applies to the amount realized. For PTP interests, that means gross proceeds as reported under the broker reporting rules.4eCFR. 26 CFR 1.1446(f)-4 – Withholding on the Transfer of a Publicly Traded Partnership Interest It is the total payment, not the seller’s profit. A seller who breaks even or takes a loss still faces withholding on the full amount realized unless a valid certificate or another exemption is in place.
Section 1446(f) works alongside Section 864(c)(8), which treats gain from the sale of a partnership interest as effectively connected income to the extent the partnership holds assets connected to a U.S. business.5Office of the Law Revision Counsel. 26 USC 864 – Definitions of Source The withholding exists to make sure that liability is collected from foreign sellers before the money leaves the country.
When a Certificate Is Not the Right Document
The non-foreign status certificate only works for U.S. persons. A foreign seller cannot use one. If the transferor is foreign and wants to reduce or eliminate withholding under an income tax treaty, the right document is Form W-8BEN (individuals) or Form W-8BEN-E (entities). For W-8BEN-E, treaty claims for Section 1446(f) purposes typically involve Line 15, where the entity represents that it is claiming benefits on gains not attributable to a permanent establishment, including gains subject to tax under Section 864(c)(8) from the transfer of a partnership interest.6Internal Revenue Service. Instructions for Form W-8BEN-E
A W-8BEN-E already filed for Sections 1441 or 1442 purposes will generally satisfy the 1446(f) documentation requirements as well, though the IRS notes the two sets of rules don’t always align perfectly and the transferor may need to consult the specific 1446(f) regulations for additional requirements.6Internal Revenue Service. Instructions for Form W-8BEN-E
Two other situations sidestep the certificate on PTP transfers. If the PTP has posted a valid qualified notice stating that the 10-percent exception applies, brokers can rely on it and skip the withholding entirely. And if the proceeds are already subject to backup withholding under Section 3406, no separate 1446(f) withholding is required.4eCFR. 26 CFR 1.1446(f)-4 – Withholding on the Transfer of a Publicly Traded Partnership Interest
What the Withholding Agent Must Do With It
Receiving the certificate is not an automatic pass. A withholding agent cannot rely on a certification if it has actual knowledge that the certification is incorrect or unreliable.2eCFR. 26 CFR 1.1446(f)-2 – Withholding on the Transfer of a Non-Publicly Traded Partnership Interest A broker who knows the transferor is foreign despite receiving a Form W-9 claiming U.S. status must still withhold.
For non-PTP transfers where a partnership relies on its own books and records rather than a transferor certification, the standard is stricter: the partnership cannot rely on its records if it knows or has reason to know the information is incorrect or unreliable.2eCFR. 26 CFR 1.1446(f)-2 – Withholding on the Transfer of a Non-Publicly Traded Partnership Interest “Reason to know” reaches red flags a diligent reviewer would spot, such as a foreign address or contradictory documentation.
If a defect surfaces before the transfer settles, the transferor must be notified and given the chance to submit a corrected version. If no corrected certificate arrives before closing, the agent must proceed with the withholding. A defect discovered after settlement is harder to fix, and the agent’s liability then depends on whether it met the reliance standard at the time of the transfer.
Retention matters too. The withholding agent must keep the certification for the longer of five calendar years after the close of the last calendar year in which the agent relied on it, or for as long as the information remains relevant to the withholding obligation.7GovInfo. 26 CFR 1.1446(f)-2 – Withholding on the Transfer of a Non-Publicly Traded Partnership Interest That file is the agent’s proof if the IRS later questions why no tax was withheld.
What Happens Without a Valid Certificate
Under Section 1461, every person required to withhold is personally liable for the tax they should have collected. The statute states the agent is “made liable for such tax” and is indemnified against claims from the person whose funds were withheld.8Office of the Law Revision Counsel. 26 USC 1461 – Liability for Withheld Tax Miss the 10 percent and the IRS collects the full amount from the agent, with interest from the date the deposit should have been made.
The tax obligation does not disappear if the transferee fails to withhold. Section 1446(f)(4) makes the partnership itself responsible for collecting the missed tax by withholding from future distributions to the transferee.1Office of the Law Revision Counsel. 26 USC 1446 – Withholding of Tax on Foreign Partners Share of Effectively Connected Income The buyer still gets hit, just later and through a different mechanism, plus the added complications of the partnership having to report and transmit those amounts using the Form 8288 series.9Internal Revenue Service. Instructions for Form 8288 – U.S. Withholding Tax Return for Certain Dispositions by Foreign Persons
When withholding does apply, non-PTP transferees report on Form 8288 with an accompanying Form 8288-A, filed and paid within 20 days after the transfer.10Internal Revenue Service. Instructions for Form 8288 (01/2026) Brokers withholding on PTP transfers report on Form 1042-S and file an annual Form 1042.4eCFR. 26 CFR 1.1446(f)-4 – Withholding on the Transfer of a Publicly Traded Partnership Interest The foreign transferor uses the 1042-S to claim a credit for the withheld amount on their U.S. return.
Collecting a compliant certificate before closing, checking it against the content requirements, and filing it away for five years is the entire preventive routine. The document is short. The alternative is not.