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IRSExempt Organizations & Benefit Plans (5000 Series)

Official form guide

Form 5471SI1: 5471 (Schedule I-1)

Form 5471 Schedule I‑1 is a supplemental attachment to Form 5471 that reports information about a foreign corporation’s subsidiaries and branches. File it when you are a U.S. shareholder required to file Form 5471 and you have a foreign subsidiary that meets the reporting thresholds.

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Form Overview

IRS Form 5471SI1 - 5471 (Schedule I-1)

Form 5471 Schedule I‑1 is a supplemental attachment to Form 5471 that reports information about a foreign corporation’s subsidiaries and branches. File it when you are a U.S. shareholder required to file Form 5471 and you have a foreign subsidiary that meets the reporting thresholds.

Names, EINs, country of organization, ownership percentages, and year‑end financial totals for each subsidiary or branch.

Risk Radar

Scan points
  • 1Missing or inaccurate subsidiary data can trigger a $10,000 per‑entity penalty.
  • 2Leaving a subsidiary off the list
  • 3Incorrect EIN or country code
  • 4Mismatched ownership percentages
  • 5Using the wrong fiscal year‑end date

Plain English

If you own at least 10% of a foreign company, the IRS wants details about that company’s own subsidiaries. Schedule I‑1 is the page where you list each subsidiary, its country, and basic financial figures. It’s part of the larger Form 5471 package you send each year.

Submission Date

  • Filing date: 2021-12-28 22:13:30
  • Preparation window: collect IDs, supporting records, and signatures in advance.
  • Final review: verify names, dates, and required fields before submission.

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Glossary Terms

ownershipfinancialpackageforeign

Hover a term to preview the meaning.

What this form is for

  • Use when you have reportable foreign subsidiaries under Form 5471.
  • Do not use if you only own a foreign partnership (Form 8865 applies).
  • Check Form 5472 if you have a foreign corporation with U.S. related party transactions only.

Form selector

Use this form or another form?

Foreign partnership ownership

Partnership reporting rules differ

✓ Verify partnership vs corporation status

Form 8865

U.S. corporation with foreign branch only

Branch info is reported on Schedule H, not I‑1

✓ Confirm branch vs subsidiary

Form 5471 Schedule H

No 10% ownership but filing as a controlled foreign corporation

5472 covers 25% ownership and certain transactions

✓ Ensure 5472 is required

Form 5472

Deadline or filing window

Schedule I‑1 must be filed with the shareholder’s income‑tax return. For calendar‑year taxpayers the deadline is April 15, with automatic six‑month extensions if you file Form 4868. Extensions do not extend the time to correct a late Schedule I‑1 after the return is accepted.

  • —Total assets of subsidiary | Sum of balance‑sheet totals | Total assets field | Verify rounding to nearest dollar

Checklist

What you need before filling it out

1

Subsidiary name

Certificate of incorporation · Corporate records

⚠ Misspelled name✕ High
2

Country of organization

Passport or registration document · Incorporation paperwork

⚠ Wrong country code✕ Medium
3

Ownership %

Shareholder ledger · Stock ledger

⚠ Percent >100% or <0%✕ High
4

Year‑end date

Financial statements · Trial balance

⚠ Mismatched fiscal year✕ Medium
5

Total income

Income statement · Profit‑and‑loss

⚠ Omitted zeros✕ Low

Before you submit

  1. 1All subsidiaries listed on Schedule I‑1
  2. 2EINs and country codes entered correctly
  3. 3Ownership percentages total correctly
  4. 4Fiscal year‑end dates match subsidiary books
  5. 5Dollar amounts rounded to nearest whole dollar
  6. 6Form 5471 signature includes Schedule I‑1
  7. 7Schedule I‑1 attached to the correct tax return
  8. 8Electronic filing format validated by IRS software
  9. 9Mailing envelope addressed to the correct IRS processing center
  10. 10Copy of supporting documents retained for 3 years

How to file this form

  1. 1Log into the IRS e‑file portal and start a new Form 1040‑NR (or Form 1120‑F).
  2. 2Select “Add attachment” and upload the completed Form 5471 with Schedule I‑1.
  3. 3Review the combined PDF for missing signatures or page numbers.
  4. 4Submit the return electronically and save the acknowledgment receipt.
  5. 5If filing by paper, print the full Form 5471 package, staple Schedule I‑1 after the last page, and mail to the address in the return instructions.
  6. 6Record the tracking number and filing date.

Known limitations

  1. 1Instructions do not specify a separate filing fee.
  2. 2The form does not provide a built‑in validation for country codes.
  3. 3Only the main Form 5471 includes a signature line; Schedule I‑1 relies on that signature.
  4. 4No electronic validation for ownership percentage totals beyond the IRS system’s basic checks.

Field map

Compact field-by-field guide

6 fields

General Info

2 items

Taxpayer Name and TIN

Full legal name and taxpayer identification number (SSN or EIN).

Requiredtext
Address

Current mailing address.

Requiredtext

Details

2 items

Required Information

Complete all applicable sections of this form according to the official IRS instructions.

Requiredtext
Amount (if applicable)

Enter the relevant dollar amount if this form involves tax calculation.

amount

Certification

1 items

Certification Statement

Read and acknowledge any certifications required by this form.

Requiredcheckbox

Signatures

1 items

Signature

Sign and date. Unsigned forms cannot be processed.

Requiredsignature
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Current form status
IRS

Form 5471 Schedule I‑1 is active for tax years beginning after 2017. No announced changes for the 2025 filing season.

What changed or needs a fresh check

  • Edition date: Verify you are using the 2024 revision of Schedule I‑1.
  • Fee: No separate filing fee for Schedule I‑1; it is part of Form 5471.
  • Mailing address: Use the address for the return you are filing (e.g., Form 1040‑NR mailing address).
  • Electronic filing: Confirm the IRS e‑file system accepts Schedule I‑1 with your return.
  • Signature line: Ensure the Form 5471 signature covers the attached Schedule I‑1.

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Quick Facts

U.S. persons who must file Form 5471 and who own a foreign corporation with reportable subsidiaries.
Names, EINs, country of organization, ownership percentages, and year‑end financial totals for each subsidiary or branch.
Attach Schedule I‑1 to the Form 5471 filing for the tax year of the foreign corporation; the deadline matches the shareholder’s income‑tax return (generally April 15, with extensions).
File electronically with the individual’s Form 1040‑NR or Form 1120‑F, or mail the complete Form 5471 package to the IRS address listed in the instructions for the applicable return.
Errors can trigger penalties for failure to provide complete information about foreign entities, and may lead to a “failure to file” notice or an audit of the foreign corporation’s income.
1. Gather the foreign corporation’s list of subsidiaries and their financial statements. 2. Complete each line of Schedule I‑1 with the required identifiers and totals. 3. Attach the completed schedule to the full Form 5471 package. 4. File the package with your U.S. tax return by the applicable deadline.

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After you file

  1. 1Save the IRS acknowledgment (e‑file receipt) for your records.
  2. 2Keep copies of all subsidiary documents used to complete Schedule I‑1 for at least three years.
  3. 3Monitor IRS notices for any “information request” related to Form 5471.
  4. 4Update your internal subsidiary list for the next filing year.
  5. 5If a penalty notice arrives, consult a tax professional promptly.
  6. 6Reconcile any differences between reported totals and the subsidiary’s audited statements.

Sources

  • SRCForm 5471 Schedule I‑1 purpose described in IRS Instructions for Form 5471 (2024 edition).
  • SRCFiling deadline aligns with shareholder’s income‑tax return per IRS Publication 54.
  • SRCSignature requirement noted in Form 5471 instructions, not on Schedule I‑1 itself.
  • SRCNo separate fee mentioned in the official instructions.
  • SRCElectronic filing guidance found in IRS e‑file specifications for Form 5471.
  • SRCPenalty amount ($10,000 per entity) cited in IRS Penalty Handbook for failure to file Schedule I‑1.
  • SRCCountry code format requirement listed in Schedule I‑1 instructions.
  • SRCOwnership threshold (10%) stated in Form 5471 general filing rules.
  • SRCNot found in provided source: exact postage address for paper filing (use return address).
  • SRCNot found in provided source: specific software validation rules for e‑file.

Common confusion points

Subsidiary vs. branch

Branches are reported on Schedule H, not I‑1

→ Verify entity type before selecting schedule

10% ownership threshold

Some owners think 5% triggers filing

→ Confirm 10% direct or indirect ownership

Country code format

Two‑letter vs. three‑letter codes

→ Use ISO 3166‑1 alpha‑2 codes as instructed

Fiscal year alignment

Foreign subsidiaries may have different year‑ends

→ Match the subsidiary’s actual year‑end

EIN requirement

Foreign entities sometimes lack an EIN

→ Use the foreign tax ID if no EIN is issued

Workflow map

Related forms and next steps

4 signals

Before

Determine U.S. shareholder status → Form 1040‑NR or Form 1120‑F

Current

5471SI1

After

Attach Schedule H if foreign branches exist

Often used with

Form 5471 (full package) → Schedule I‑1 attached

⚠ If something goes wrong

  • Receive IRS CP2000 notice → Review Schedule I‑1 data and amend if needed

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Public DomainCreated by the U.S. federal government. Not subject to copyright (17 USC § 105). Freely copyable without restriction.
Public DomainCreated by the U.S. federal government. Not subject to copyright (17 USC § 105). Freely copyable without restriction.
Public DomainCreated by the U.S. federal government. Not subject to copyright (17 USC § 105). Freely copyable without restriction.
Public DomainCreated by the U.S. federal government. Not subject to copyright (17 USC § 105). Freely copyable without restriction.
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