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IRSOther IRS Forms (2000–3999)

Official form guide

Form 3881: 3881

Form 3881 is the IRS Application for Extension of Time to File Form 1120‑F (foreign corporation income tax return). Use it when a foreign corporation needs more than the standard 6‑month filing period for its Form 1120‑F.

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Form Overview

IRS Form 3881 - 3881

Form 3881 is the IRS Application for Extension of Time to File Form 1120‑F (foreign corporation income tax return). Use it when a foreign corporation needs more than the standard 6‑month filing period for its Form 1120‑F.

The form captures the corporation’s name, EIN, tax year, original filing deadline, and the requested extension period.

Risk Radar

Scan points
  • 1A late or incomplete Form 3881 can trigger penalties even if the return is later filed on time.
  • 2Submitting after the original filing deadline
  • 3Leaving the signature line blank
  • 4Requesting more than a 6‑month extension
  • 5Incorrect EIN or tax year

Plain English

If a foreign company can’t get its Form 1120‑F ready by the deadline, it files Form 3881 to ask the IRS for extra time. The request must be sent before the original due date, and the IRS usually grants an automatic 6‑month extension if the paperwork is complete.

Submission Date

  • Filing date: 2016-10-26 00:00:00
  • 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

income taxforeignperiodincomemonth

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What this form is for

  • Use when you need extra time to file Form 1120‑F.
  • Do not use for domestic corporations or other return types.
  • If you need an extension for Form 1120‑S, see Form 7004.

Form selector

Use this form or another form?

Domestic corporation needs extension

Covers many U.S. corporate returns

✓ Verify corporation type first

Form 7004

Extension for partnership return

Applies to Form 1065 filings

✓ Confirm partnership status

Form 8868

Deadline or filing window

The extension request must be received by the IRS on or before the original Form 1120‑F due date. If the request arrives after that date, the IRS will not grant the extension and penalties may apply. The granted extension is automatically six months from the original deadline unless a shorter period is requested.

  • —Original due date | Add 6 months | Extended due date | Verify calendar month length

Checklist

What you need before filling it out

1

Corporation name

Articles of Incorporation or IRS registration · Form 3881 header

⚠ Misspelled name✕ High
2

EIN

IRS EIN assignment letter · Form 3881 line 2

⚠ Wrong digits✕ Medium
3

Tax year end

Financial statements · Form 3881 line 3

⚠ Mismatched year✕ High
4

Signature

Authorized officer’s signature · Form 3881 signature block

⚠ Blank or unauthorized✕ High
5

Requested extension period

Calculation of 6‑month max · Form 3881 line 5

⚠ Exceeds 6 months✕ Medium

Before you submit

  1. 1Use the latest edition of Form 3881
  2. 2Confirm corporation name and EIN match IRS records
  3. 3Enter the correct original filing deadline
  4. 4Calculate the extension end date (max 6 months)
  5. 5Sign and date the form
  6. 6Attach any required payment for tax due
  7. 7Mail to the correct IRS address before the deadline
  8. 8Retain a copy of the mailed form and proof of postage

How to file this form

  1. 1Download Form 3881 from IRS.gov
  2. 2Complete identification and tax‑year fields
  3. 3Enter the original Form 1120‑F due date
  4. 4Specify the requested extension end date (≤ 6 months)
  5. 5Sign the form as an authorized corporate officer
  6. 6Prepare any required tax payment
  7. 7Mail (or fax) to the address in the instructions
  8. 8Track delivery confirmation

Known limitations

  1. 1No electronic filing option
  2. 2Only grants up to a 6‑month extension
  3. 3Extension does not waive interest on tax due
  4. 4Form does not provide automatic penalty relief

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 3881 is active and in regular use for foreign corporation extensions. Check the IRS website for the latest edition date before filing.

What changed or needs a fresh check

  • Edition date – verify the form is the current year’s version
  • Fee – no filing fee for the extension request itself
  • Mailing address – use the address in the latest instructions
  • Signature line – must be signed by an authorized officer
  • Contact information – include a current phone number for follow‑up

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Form 3881 page 1

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Quick Facts

Foreign corporations that file Form 1120‑F and need additional time to complete that return.
The form captures the corporation’s name, EIN, tax year, original filing deadline, and the requested extension period.
File Form 3881 on or before the original Form 1120‑F due date (generally the 15th day of the 6th month after the corporation’s fiscal year end).
Mail the completed form to the IRS address listed in the instructions for Form 3881, or fax if an authorized fax number is provided. No electronic filing option is available.
Errors or missing information can cause the extension request to be denied, leaving the corporation liable for late‑filing penalties and interest.
1. Download the latest Form 3881 from the IRS website. 2. Fill in corporate identification, tax year, and original due date. 3. Indicate the requested extension end date (up to 6 months). 4. Sign and date the form. 5. Mail (or fax) it to the address in the instructions before the original deadline.

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After you file

  1. 1Keep the mailed copy and receipt for records
  2. 2Monitor IRS acknowledgment (if received)
  3. 3Pay any tax due by the original deadline to avoid interest
  4. 4Prepare Form 1120‑F for the new deadline
  5. 5Update corporate calendar with the extended due date
  6. 6If the extension is denied, file Form 1120‑F immediately and address penalties

Sources

  • SRCForm 3881 title and purposeIRS official form description
  • SRCExtension period limitIRS instructions for Form 3881
  • SRCSignature requirementForm 3881 instructions
  • SRCMailing addressIRS Form 3881 instructions page
  • SRCNo electronic filingIRS filing options list
  • SRCDeadline timingGeneral rule for Form 1120‑F extensions
  • SRCFee informationIRS instructions state no fee for extension request
  • SRCEligibilityForeign corporation filing Form 1120‑F

Common confusion points

Extension vs. amendment

People think Form 3881 amends a filed return

→ Verify you are filing before the original due date

Domestic vs. foreign corporation

Form 3881 is only for foreign corporations filing Form 1120‑F

→ Check corporation classification

Maximum extension length

Some assume any length can be requested

→ Remember the IRS caps at 6 months

Electronic filing availability

Users look for e‑file option

→ Confirm that only paper filing is accepted

Workflow map

Related forms and next steps

4 signals

Before

Form 1120‑F (original return)

Current

3881

After

Form 1120‑F (file by extended deadline)

Often used with

Form 7004 (domestic corporation extensions)

⚠ If something goes wrong

  • Contact IRS Business & Specialty Tax Line

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Source transparency

Copyright & Licensing - US Government Forms

Independent guide

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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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