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Official form guide
IRS Form 8804-C is the Certificate of Partner-Level Items to Reduce Section 1446 Withholding. A foreign partner files it to certify that its partnership interest is its only ECTI source, allowing reduction of 1446 tax when the estimated tax is under $1,000.
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IRS Form 8804-C is the Certificate of Partner-Level Items to Reduce Section 1446 Withholding. A foreign partner files it to certify that its partnership interest is its only ECTI source, allowing reduction of 1446 tax when the estimated tax is under $1,000.
Plain English
Form 8804-C lets a foreign partner certify that its only U.S. business income comes from the partnership. If the partnership estimates the 1446 tax for that partner will be under $1,000, the form can reduce or eliminate the withholding. The partner provides its name, address, tax ID and any unfiled returns. The partnership then uses the certification to determine the correct amount of tax to withhold.
Submission Date
AI co-pilot
Form selector
First installment of 1446 tax due
Attaches Form 8804-C to claim reduction of withholding
✓ Confirm Form 8804-C is attached to Form 8813
Annual filing of partnership’s 1446 tax
Form 8804-C must accompany Form 8804 to reduce tax
✓ Verify Form 8804-C is attached to Form 8804
Reporting partner’s share of partnership items on partner’s return
Form 8805 is used together with Form 8804-C when filing
✓ Ensure Form 8805 includes the partner’s certification
When a foreign partner files a U.S. federal income tax return, an updated Form 8804-C must be provided to the partnership within 10 days of that filing. The source does not mention any extension to this 10‑day deadline.
Checklist
Part I, Section B (partnership name, address, EIN)
Complete partnership name, address, EIN · Form 8804-C Part I
Lines 8a–8f (certifications of losses and deductions)
Accurate loss amounts and supporting statements · Form 8804-C Part II
Line 4a (returns not filed)
List of unfiled returns · Form 8804-C Part I
Part III certification statement
Signature under penalties of perjury · Form 8804-C Part III
Part IV (signature)
Partner or authorized representative signature and date, power of attorney if applicable · Form 8804-C Part IV
Field map
Entity Info
1 items
Name and taxpayer ID of the entity claiming the credit.
Credit Info
1 items
Type of credit or incentive being claimed.
Calculation
2 items
The base amount used to calculate the credit.
Calculated credit amount after applying formulas and limitations.
Certification
1 items
Detailed breakdown supporting the credit calculation.
Signatures
1 items
Sign and date the form.
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Fillable formOpen in Editor->Form 8804-C is the March 2009 revision (Form 8804-C (Rev. 3-2009)). The instructions were updated in November 2012 and direct users to www.irs.gov/form8804 for the latest information.
Quick Facts
Downloads
Can I file Form 8804-C after the partnership has already filed Form 8804?
Filers may think timing doesn’t matter, but the form must be submitted before the partnership files its Form 8804.
→ Verify the partnership has not yet filed Form 8804 before sending Form 8804-C. (Instructions p.1)
Do I need to mail Form 8804-C directly to the IRS?
The IRS address appears in the instructions for comments, not for filing.
→ Send the form to the partnership, not to the IRS address. (Instructions p.6)
What if the estimated 1446 tax for my share is $1,200?
The reduction is only allowed when the estimated tax is under $1,000.
→ Confirm the partnership’s estimate of your 1446 tax is less than $1,000 before using the certificate. (Instructions p.1)
I am an upper‑tier partnership. Can I forward Form 8804-C to a lower‑tier partnership for my foreign partner?
The rule applies only when look‑through is permitted under Regulations section 1.1446‑5.
→ Check that Regulations section 1.1446‑5 allows the look‑through before forwarding. (Instructions p.2)
My foreign partner receives mail through my accountant. How should the address be written?
Filers often omit the required “c/o” notation.
→ Include “c/o” followed by the accountant’s name and address on the street address line. (Instructions p.2)
What happens if the IRS says my certificate is defective?
Filers may assume the certificate can still be used.
→ Wait for written IRS notification; do not use the certificate until the notice is revoked or modified. (Instructions p.1)
Workflow map
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Current
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⚠ If something goes wrong
Form 8804-C lets a foreign partner certify that its only U.S. business income comes from the partnership. If the partnership estimates the 1446 tax for that partner will be under $1,000, the form can reduce or eliminate the withholding. The partner provides its name, address, tax ID and any unfiled returns. The partnership then uses the certification to determine the correct amount of tax to withhold.
A foreign partner must use IRS Form 8804-C to certify its partnership interest for reduction of Section 1446 withholding.
The form collects the partner’s name, address, and taxpayer identification number (Part I, Section A), the partnership’s name, address, and EIN (Part I, Section B), a list of any unfiled returns (line 4a), and, if applicable, certifications of deductions and losses on lines 8a‑8f.
An updated Form 8804-C must be submitted to the partnership within 10 days of the partner’s tax‑return filing.
The foreign partner fills Part I, Section A with its full name, address, and taxpayer ID, then completes Part I, Section B with the partnership’s name, address, and EIN. The partner lists any unfiled returns on line 4a and, if making certifications, completes lines 8a‑8f in Part II. Required statements are attached, the form is signed and dated in Part IV, and a power of attorney is attached if signed by a representative.
If the certification is incomplete or inaccurate, the partnership cannot reduce the 1446 tax and must withhold the full amount.
Filers may think timing doesn’t matter, but the form must be submitted before the partnership files its Form 8804. Verify the partnership has not yet filed Form 8804 before sending Form 8804-C. (Instructions p.1)
The IRS address appears in the instructions for comments, not for filing. Send the form to the partnership, not to the IRS address. (Instructions p.6)
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