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Official form guide
Form 1120F: 1120-F
Form 1120-F is the U.S. corporate income tax return for foreign corporations that have income effectively connected with a U.S. trade or business, or have U.S.-source income subject to tax. File it to report that income and calculate any tax due.
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IRS Form 1120F - 1120-F
Form 1120-F is the U.S. corporate income tax return for foreign corporations that have income effectively connected with a U.S. trade or business, or have U.S.-source income subject to tax. File it to report that income and calculate any tax due.
Risk Radar
Scan points- 1A single omitted line can trigger a penalty equal to 5% of the tax due per month.
- 2Missing or misclassifying U.S.-source income
- 3Incorrect tax year alignment
- 4Omitting required Schedule G (branch profits tax)
- 5Failure to attach supporting statements
Plain English
If a company organized outside the United States earns money in the U.S., it must file this return. The form tells the IRS how much U.S. income the foreign corporation earned and how much tax it owes.
Submission Date
- Filing date: 2026-01-26 13:10:37
- Preparation window: collect IDs, supporting records, and signatures in advance.
- Final review: verify names, dates, and required fields before submission.
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What this form is for
- Use when a foreign corporation has U.S.-source income.
- Do not use for U.S. domestic corporations (use Form 1120).
- If only passive U.S.{ } income, consider Form 1120‑F Schedule I instead.
- : : : : : : :
Form selector
Use this form or another form?
U.S. corporation with no foreign activities
Different filing entity type
✓ Verify entity status
Foreign corporation with only FDAP income
No tax return required unless effectively connected
✓ Confirm income type
Foreign corporation electing to be taxed as a U.S. corporation
Different tax regime
✓ Ensure election is filed first
Deadline or filing window
The return is due the 15th day of the fourth month after the corporation’s fiscal year ends (e.g., April 15 for a calendar‑year filer). An automatic six‑month extension can be requested by filing Form 7004. If the extension is granted, the new deadline is the 15th day of the tenth month after year‑end.
- —Gross U.S. income | Sum of all Schedule C lines | Total gross income | Verify source of each amount
- —Taxable income | Gross income – deductions | Taxable income | Ensure deductions are allowable
Checklist
What you need before filling it out
Line 1 – Gross income
Income statements, 1099‑R, 1042‑S · Financial records
Line 12 – Deductions
Expense receipts, payroll records · Accounting ledger
Schedule G – Branch profits tax
Prior year branch profit statements · Corporate books
Signature block
Corporate officer authorization letter · Corporate bylaws
Tax payment
Bank copy of payment or electronic confirmation · TreasuryDirect
Before you submit
- 1All U.S.-source income items are listed on Schedule C
- 2All allowable deductions are supported by receipts or invoices
- 3Schedule G is attached if branch profits tax applies
- 4Form 7004 (extension) attached if filing after original deadline
- 5Tax due is paid or payment voucher (Form 1120‑F‑V) included
- 6Signature of an authorized officer is present
- 7Form is printed on single‑sided 8½"×11" paper (if mailed)
- 8PDF version is PDF/A‑1b compliant (if e‑filed)
- 9Mailing envelope includes correct IRS address and postage
- 10Copy of the completed form retained for records
How to file this form
- 1Collect all U.S. income statements and expense documentation.
- 2Complete Schedule C (income) and Schedule D (deductions).
- 3Calculate tax liability using the rates in the instructions.
- 4Attach required schedules (G, I, etc.) and Form 7004 if needed.
- 5Sign the form and attach payment or payment voucher.
- 6Mail to the IRS address for foreign corporations or submit via approved e‑file system.
- 7Keep a dated copy of the filed return and proof of mailing/payment.
Known limitations
- 1IRS instructions do not list a filing fee, but tax due must be paid separately.
- 2Electronic filing is limited to corporations that meet specific e‑file criteria.
- 3The form does not capture state tax obligations; separate state filings may be required.
- 4Instructions provide examples, not exhaustive lists of all possible income types.
Field map
Compact field-by-field guide
Entity Info
2 items
Full legal name of the corporation and its Employer Identification Number.
Current mailing address and date of incorporation.
Income
3 items
Total revenue from business operations before deducting costs.
Direct costs attributable to producing goods sold by the corporation.
Gross receipts minus cost of goods sold and returns/allowances.
Deductions
1 items
Sum of all business expenses including compensation, rent, interest, taxes, and depreciation.
Tax
2 items
Total income minus total deductions.
Tax calculated on taxable income using the applicable corporate tax rate, minus any credits.
Signatures
1 items
An authorized corporate officer must sign and date the return.
Almost done reviewing the fields?
Fillable formOpen in Editor->Form 1120-F for tax year 2024 is available on the IRS website. The latest revision date is March 2024. No filing fee is required, but any tax due must be paid.
What changed or needs a fresh check
- Edition date: March 2024 (latest revision)
- Fee: No filing fee, but any tax owed must be paid
- Mailing address: See IRS instructions for Form 1120‑F (IRS Center, PO Box ... )
- Electronic filing eligibility: Only for corporations meeting e‑file criteria
- Signature block: Must be signed by an authorized officer
Quick Facts
Downloads
After you file
- 1Store a scanned copy of the filed return and all attachments.
- 2Record the IRS acknowledgment number (if e‑filed) or certified mailing receipt.
- 3Track the payment due date for any remaining tax balance.
- 4Monitor for IRS notices or requests for additional information.
- 5Reconcile the reported amounts with the corporation’s internal financial statements.
- 6Prepare for next year’s filing by updating a checklist of required documents.
Sources
- SRCIRS Form 1120‑F instructionsofficial PDF (2024 revision)
- SRCIRS Publication 514Foreign Tax Credit (reference for branch profits tax)
- SRCIRS Form 7004 instructionsextension rules
- SRCIRS e‑file eligibility criteria for corporate returns
- SRCIRS Form 1120‑F‑V payment voucher details
- SRCIRS website address list for mailing foreign corporation returns
- SRCIRS penalty guidelines for late or incomplete filings
Common confusion points
Foreign vs. domestic corporation
The term “foreign” refers to place of incorporation, not residence
→ Verify incorporation documents
Effectively connected income vs. FDAP
Misclassifying can change filing requirement
→ Review source rules in instructions
Branch profits tax applicability
Often overlooked for subsidiaries
→ Check Schedule G instructions
Extension filing
Form 7004 is separate from Form 1120‑F
→ Ensure Form 7004 is filed before original deadline
Electronic filing eligibility
Not all foreign corporations qualify
→ Confirm eligibility in IRS e‑file guidelines
Workflow map
Related forms and next steps
Before
Current
After
Often used with
⚠ If something goes wrong
- Form 568 – Notice of Deficiency (IRS notice)
Source transparency
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