Foreign partners
A K-1 for a foreign partner comes with a second document, and the credit is on the second one
A foreign partner's K-1 is only half the package. The withholding that the partnership paid on their behalf is reported separately, and the number on the K-1 will not match it — because it is not supposed to.
This is a file where the wrong assumption is easy and expensive: that the credit equals some percentage of the distributive share on the K-1. It does not. The withholding base is effectively connected taxable income, which is its own computation, and the partner's certificate of deductions can reduce it further.
The papers
Five documents that are not the K-1
| Document | Carries | Goes where | How it gets lost |
|---|---|---|---|
| Form 8805 | The partnership's statement of each foreign partner's share of effectively connected income and the tax withheld | The partner's own return as a credit | A credit claimed without the form, or the form filed without the credit. Both leave money on the table or invite a notice. |
| Form 8804 | The partnership's annual return for the withholding itself | Not the partner's document; it is what makes the 8805 valid | A partner holding an 8805 where no 8804 was filed has a statement the IRS cannot match to anything. |
| Form 1042-S | Payments of a different character — the fixed or determinable amounts paid to a foreign person | The partner's return, on its own line, not netted against the 8805 | Two credits merged into one figure, which then reconciles against neither statement. |
| Form 8288-A | Withholding on the transfer of a partnership interest, where the transferor is foreign | The transferor's return as a credit | A transfer that happened years ago, unclaimed, because the form went to a different adviser. |
| Form 8804-C | The partner's certificate of deductions and losses, given to the partnership to reduce what is withheld | Filed with the partnership, not with the return | The certificate is never given, too much is withheld, and the partner waits a year for the refund. |
Forms and rates are set by the current year's instructions for Forms 8804, 8805 and 1042-S. Confirm the version in your own package before relying on a figure from a prior year.
The tie-out the credit depends on
Take every withholding statement issued to this partner for the year and add them by type: the 8805 amounts together, the 1042-S amounts together, and any 8288-A separately. Each total lands on its own line of the partner's return. Combining them produces a figure that reconciles against none of the statements, and the notice that follows is not easy to answer.
Then check the identifying details on the 8805 against the partner record: name, identifying number, country and the year. These are generated in a batch at the partnership, and a batch assembled with a stale partner list produces statements that are arithmetically sound and attached to the wrong person.
Finally, check that the year on the statement matches the year on the K-1. Withholding is paid in instalments during the year and reported on an annual return, and a statement for the prior year that arrives with this year's K-1 is a common misfiling during a busy February.
Why the two figures differ, in plain terms
The K-1 answers: what is this partner's distributive share of each item of partnership income, gain, loss, deduction and credit. The withholding statement answers a narrower question: what part of that share is effectively connected with a US trade or business, after the adjustments that concept brings, and what tax was paid on it.
A partner can have a large K-1 and a small withholding figure because most of their share is not effectively connected. A partner can have a modest K-1 and a withholding figure that looks disproportionate because the rate applied is the highest applicable rate and no certificate reduced it. Both look wrong if you assume one is a percentage of the other, and both are normal.
The practical consequence is that the explanation has to be written down. A reviewer who sees a credit that does not match the K-1 will ask, and "the instructions say so" is a worse answer than a note naming which document the credit came from and which page of the file it sits on.
Three things to establish before the return is prepared
- Whether the partner is a partner for a part of the year. A transfer mid-year splits both the K-1 and the withholding, and the two splits may not follow the same date.
- Whether a certificate was filed with the partnership. If it was not, the partner may have overpaid during the year and the correction is a refund on the return rather than a late certificate.
- Whether treaty benefits were claimed. The treaty position belongs on a form filed with the partnership in advance. Claiming it after the fact is a credit question, not a rate question, and the two are handled differently.
The K-1 side of this file is read the same way as any other: every box, every code, with the page it came from, which is what the CSV reading step produces. What is different for a foreign partner is how much of the answer lives off the page, and the statement guide covers the parts of that which are attachments to the form itself.
Plain answers
Questions about foreign partner withholding
What is the difference between the K-1 and the 8805?
The K-1 reports the partner's distributive share of partnership items. The 8805 reports the partner's share of effectively connected taxable income and the tax withheld on it. The two figures are computed on different bases and are not expected to be equal, which is why the credit is taken from the 8805 rather than derived from the K-1.
Why is the withholding figure not a simple percentage of my distributive share?
Because withholding runs on effectively connected taxable income, which applies its own adjustments, and because the rate can be tiered or reduced by a certificate of deductions the partner filed with the partnership. A figure that looks like the wrong percentage is usually the right percentage of a different base.
Can a foreign partner claim a credit for tax withheld by the partnership?
Yes, and the 8805 is the document that supports it. The credit is claimed on the partner's own return for the same year. Where the partner is an individual filing a nonresident return, the credit line is what turns the withholding into a refund or a balance due.
What happens if the partner's W-8 form expired?
The withholding rate can change, and the partnership may withhold more than the treaty would otherwise allow. The file should show the form, its date and its expiry, because the difference between two rates is a real amount of money sitting with the IRS until the return is filed.
Does K1 FastTax read the 8805 or the 1042-S?
No. It reads the Schedule K-1 and records the partner's share of the items as printed. The withholding statements are separate documents with their own layout, and the reconciliation in this guide is one you do by hand.
The K-1 read cleanly leaves the withholding alone
K1 FastTax reads the K-1 boxes and codes as printed and does not touch the withholding statements, which is deliberate: the credit belongs to documents with their own rules.