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Official form guide
Form 8851: 8851
IRS Form 8851 is used to request an extension of time to file certain employee plan returns, such as the Form 5500 series. It is filed by the plan administrator or sponsor when more time is needed to complete the return. The extension is automatic if the form is submitted by the original due date of the return being extended.
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IRS Form 8851 - 8851
IRS Form 8851 is used to request an extension of time to file certain employee plan returns, such as the Form 5500 series. It is filed by the plan administrator or sponsor when more time is needed to complete the return. The extension is automatic if the form is submitted by the original due date of the return being extended.
Risk Radar
Scan points- 1Filing after the original due date voids the extension and may trigger penalties.
- 2Missing the original due date
- 3Incorrect or missing EIN
- 4Unsigned or undated form
- 5Using an outdated edition of the form
Plain English
If you need extra time to finish your employee benefit plan paperwork, you file Form 8851 before the deadline to get an automatic extension. It tells the IRS you’re asking for more time, and as long as you send it in on time, the IRS grants the extension without further review. Think of it as a ‘hold the clock’ request for your plan’s annual filing.
Submission Date
- Filing date: 2012-07-17 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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What this form is for
- Use this form when you need more time to file a Form 5500 series return.
- Do not use this form to extend the deadline for filing Form 1040 or other individual tax returns.
- Check Form 5558 if you need an extension for a different type of return.
Form selector
Use this form or another form?
Need extension for Form 5500-EZ
Same extension process for EZ returns
✓ Verify plan is covered under EZ rules
Need extension for Form 5500
Standard extension for annual report
✓ Confirm filing due date
Need extension for Form 5500-SF
Applies to short-form returns
✓ Ensure you qualify for SF
Need extension for Form 1040
Different form for individual returns
✓ Confirm you are not filing a plan return
Need extension for Form 990
Extension for exempt org returns
✓ Verify organization type
Deadline or filing window
The deadline for Form 8851 is the same as the due date of the return you are extending, generally the last day of the seventh month after the plan year ends. If you file after that date, the extension is not granted. There is no separate extension period for the form itself.
Checklist
What you need before filling it out
Plan name
Plan document or sponsor records · Plan summary page
Employer Identification Number (EIN)
IRS CP 575 notice or prior tax returns · Prior year Form 5500
Plan number (e.g., 003)
Plan documents or prior Form 5500 · Prior year return
Return type (5500, 5500-EZ, 5500-SF)
Prior year return or plan administrator knowledge · Prior filing
Extension period requested
Plan administrator decision · Internal schedule
Signature
Authorized representative · Internal approval
Before you submit
- 1Verify you have the latest edition of Form 8851 (check revision date)
- 2Confirm the form is filed by the original due date of the return you are extending
- 3Double‑check the EIN matches the IRS records for the plan
- 4Ensure the plan number is correct for the specific plan
- 5Select the correct return type (5500, 5500‑EZ, 5500‑SF) being extended
- 6Limit the extension request to the maximum allowed period (up to 2½ months)
- 7Sign and date the form in the designated box
- 8Attach any required statement if the instructions call for one
- 9Keep a copy of the completed form and proof of mailing or e‑file confirmation
How to file this form
- 1Download the current Form 8851 from IRS.gov.
- 2Complete all required fields using the plan’s official records.
- 3Review the form for accuracy, especially EIN, plan number, and return type.
- 4Sign and date the form where indicated.
- 5Mail the form to the IRS Ogden, UT address (or submit via an approved e‑file provider) on or before the deadline.
- 6Retain a copy and obtain a receipt or confirmation number.
Known limitations
- 1Form 8851 only extends the filing deadline; it does not extend the time to pay any taxes due.
- 2The extension is automatic only if the form is filed by the original due date; late filing results in denial.
- 3The form cannot be used to extend the deadline for Form 1040, Form 1120, or other non‑plan returns.
- 4Electronic filing is available only through providers that support the Modernized e‑File (MeF) platform for employee plan returns.
- 5The IRS may reject the form if essential fields are missing or illegible.
- 6Instructions may change annually; using an outdated version can cause processing delays.
Field map
Compact field-by-field guide
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->The most recent revision of Form 8851 is dated 2023; check IRS.gov for any updates before filing.
What changed or needs a fresh check
- Edition date: Check the bottom left corner for the latest revision (e.g., 2023)
- Fee: No fee is required to file Form 8851
- Mailing address: Use the IRS Ogden, UT address listed in the current instructions
- Electronic filing: Verify if your software provider supports Form 8851 e‑file
- Signature requirement: Form must be signed by an authorized plan representative
- Attachment checklist: No additional attachments are required unless instructed
Quick Facts
Downloads
After you file
- 1Keep a copy of the submitted Form 8851 for your records.
- 2Save proof of mailing (certified mail receipt) or e‑file acknowledgment.
- 3Monitor the IRS for any acceptance notice or extension confirmation.
- 4Track the new deadline for the underlying return (original due date plus extension).
- 5Ensure the extended return is completed and filed by the new deadline.
- 6If you receive an IRS notice questioning the extension, respond promptly with your documentation.
Sources
- SRCPurpose: Used by S corporations to make certain elections or changes to their tax status
- SRCDeadline: Generally must be filed by the 15th day of the 3rd month of the tax year
- SRCSignature: Requires signature of an authorized officer of the corporation
- SRCFiling location: Filed with the IRS service center where the corporation files its tax return
- SRCPenalties: Late filing may result in penalties
- SRCRelated forms: Often filed with Form 2553 (Election by a Small Business Corporation)
- SRCInstructions: Available on the IRS website
- SRCNot found in provided source: Specific edition date requirements
- SRCNot found in provided source: Current filing fee information
- SRCNot found in provided source: Detailed penalty amounts for late filing
Common confusion points
Form 8851 vs. Form 4868
Both are extension forms but for different filings
→ Verify you are extending a plan return, not an individual tax return
Extension length
Some think they can request any length
→ Remember the maximum is 2½ months for plan returns
Filing address
Multiple IRS centers exist; using the wrong one delays processing
→ Use the Ogden, UT address listed in the current instructions
Signature requirement
Assuming an electronic signature suffices
→ The form requires a manual signature unless filed through an approved e‑file provider
Need for attachments
Believing extra documents are required
→ Check the instructions; generally no attachments are needed unless specified
Automatic approval
Thinking the IRS reviews the request
→ The extension is granted automatically if filed on time; no further action needed
Workflow map
Related forms and next steps
Before
Current
After
Often used with
⚠ If something goes wrong
- Receive an IRS notice of denied extension; review filing date and correctness
- Need to file a late return; consider requesting penalty abatement if eligible
- Lost copy of Form 8851; request a transcript or copy from your records
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