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Form 1120-ND: Return for Nuclear Decommissioning Funds and Certain Related Persons
IRS Form 1120-ND is the Return for Nuclear Decommissioning Funds and Certain Related Persons. It is used by section 468A nuclear decommissioning funds to report contributions, income, administrative expenses, and tax on modified gross income, and by disqualified persons to report section 4951 initial taxes on self-dealing. The minimum penalty for a return filed more than 60 days late is the lesser of tax due or $525.
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IRS Form 1120-ND - Return for Nuclear Decommissioning Funds and Certain Related Persons
IRS Form 1120-ND is the Return for Nuclear Decommissioning Funds and Certain Related Persons. It is used by section 468A nuclear decommissioning funds to report contributions, income, administrative expenses, and tax on modified gross income, and by disqualified persons to report section 4951 initial taxes on self-dealing. The minimum penalty for a return filed more than 60 days late is the lesser of tax due or $525.
Risk Radar
Scan points- 1Late filing penalty can be 5% per month up to 25% of unpaid tax.
- 2Using a revision of Form 1120-ND other than December 2025.
- 3Failing to sign the return as an authorized trustee or disqualified person.
- 4Not reporting self-dealing in Part II when required.
- 5Mailing a paper check instead of making electronic payment via EFTPS.
Plain English
This form is for nuclear decommissioning funds to report the money they receive, the income they earn, and the costs of running the fund. They also use it to figure and pay the tax on their income. People who do business with the fund in a way that is not allowed must file this form to report the special tax they owe.
Submission Date
- Filing date: 2026-01-09 14:10:44
- 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 are a nuclear decommissioning fund reporting contributions, income, administrative expenses, and tax on modified gross income, or when you are a disqualified person or trustee reporting section 4951 initial taxes on self-dealing.
- Do not use it when you are filing a regular corporation income tax return or when you are not a fund, trustee, or disqualified person subject to these specific taxes.
- Check Form 8822-B instead when you need to notify the IRS of a change in address after the return has been filed.
Form selector
Use this form or another form?
Filing as a nuclear decommissioning fund
This is the required return for the fund under section 468A.
✓ Use the December 2025 revision.
Filing as a disqualified person for self-dealing
Disqualified persons must file this form to report the initial tax under section 4951.
✓ File a separate return if you are liable.
Using a private delivery service
The instructions for Form 1120 provide details on private delivery service rules.
✓ Check the Instructions for Form 1120 for PDS requirements.
Deadline or filing window
The fund's return is due by the 15th day of the 4th month after the end of its tax year. An automatic extension of time to file can be obtained by filing Form 7004 by the regular due date. Disqualified persons and trustees reporting section 4951 taxes must also file Form 7004 for an extension.
Checklist
What you need before filling it out
Line 16 (Balance due)
Payment instructions · IRS.gov/Payments
Line 17 (Overpayment)
Refund or credit election · Form 1120-ND instructions
Part II (Self-dealing tax)
Initial tax computation · Form 1120-ND instructions
Where To File
IRS address · Instructions p.2
Assembling the Return
Attachment order · Instructions p.2
Rounding Off
Rounding rules · Instructions p.3
Accounting Method
Method consistency · Instructions p.3
Penalty for late filing
Minimum penalty amount · Instructions p.1
Before you submit
- 1Confirm you are using the December 2025 revision of Form 1120-ND.
- 2Check the correct box for filer type: Fund, Trustee, or Disqualified person.
- 3Enter the correct tax year (last two digits of calendar year or fill in fiscal year space).
- 4Complete Part I lines 1 through 16 accurately with all income, deductions, and tax.
- 5If electing deferral under section 1062, attach Form 1062 and Schedule(s) A.
- 6If you owe estimated tax penalty, attach Form 2220 and check the box on line 15.
- 7Calculate tax due on line 16 and pay electronically via IRS.gov/Payments.
- 8If overpayment, decide whether to credit to next year's estimated tax on line 18a.
- 9Sign and date the return (general requirement).
- 10Make a copy of the return and all attachments for your records.
- 11Mail to the correct Ogden address based on location (US or foreign).
- 12If using a private delivery service, ensure it is IRS-designated and do not use for P.O. box addresses.
How to file this form
- 1Gather all records of contributions, income, administrative expenses, and any section 4951 self-dealing transactions.
- 2Complete Part I of Form 1120-ND, entering taxable interest and other income on the appropriate lines.
- 3Compute modified gross income and tax, then enter payments and credits including backup withholding.
- 4If applicable, attach Form 1062 and Schedule A for section 1062 deferral and enter the amount on line 14f.
- 5If estimated tax penalty applies, complete Form 2220 and attach it, checking the box on line 15.
- 6Calculate total tax due or overpayment on lines 16 through 18.
- 7Pay any tax due electronically via IRS.gov/Payments; do not mail a check.
- 8Sign and date the return, then mail it to the appropriate IRS address in Ogden, UT based on the fund's location.
Known limitations
- 1This form is not used for regular corporation income tax; use Form 1120 instead.
- 2Trustees and disqualified persons file only to report section 4951 taxes, not fund income tax.
- 3This form cannot be used to change address after filing; use Form 8822-B.
- 4The form does not include estimated tax payment vouchers; estimated tax payments are made separately.
- 5The form does not provide for installment agreements; if unable to pay, apply online separately.
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->The current edition is Revision December 2025. Use this revision for 2025 and subsequent years until a superseding revision is issued. For the latest updates, check IRS.gov/Form1120ND.
What changed or needs a fresh check
- Edition date — confirm the form revision reads 'Rev. December 2025'.
- Mailing address — confirm you use the correct Ogden address: US: Department of the Treasury, Internal Revenue Service Center, Ogden, UT 84201-0012; foreign or U.S. territory: Internal Revenue Service Center, P.O. Box 409101, Ogden, UT 84409.
- Payment method — confirm you pay any tax due electronically via IRS.gov/Payments; do not mail a check unless instructed.
- Penalty — confirm you file on time to avoid the minimum penalty of $525 (adjusted for inflation) for returns more than 60 days late (for returns required to be filed after 2025).
- Tax year entry — confirm you enter the last two digits of the calendar year in the first entry space, or fill in the fiscal tax year space at the top of the form.
- Box selection — confirm you check the correct box: Fund, Trustee, or Disqualified person based on your filing purpose.
Quick Facts
Downloads
After you file
- 1Retain a copy of the filed return and all attachments for your records.
- 2If you elected to credit overpayment to next year's estimated tax on line 18a, adjust your estimated tax payments accordingly.
- 3If you receive a refund, verify it matches the amount on line 6 of Form 1120-ND.
- 4If your address changes after filing, submit Form 8822-B to the IRS.
- 5Monitor for any IRS correspondence regarding the return.
- 6If you discover an error, file an amended return using Form 1120-ND with 'Amended Return' checked in Item D.
Sources
- SRCInstructions p.1 — purpose of Form 1120-ND: report contributions, income, expenses, tax on modified gross income, and section 4951 taxes.
- SRCInstructions p.1 — use December 2025 revision for 2025 and subsequent years.
- SRCInstructions p.1 — minimum penalty for failure to file more than 60 days late is lesser of tax due or $525 (adjusted for inflation).
- SRCInstructions p.2 — Where To File addresses: US: Ogden, UT 84201-0012; foreign: P.O. Box 409101 Ogden, UT 84409.
- SRCInstructions p.5 — for calendar year, enter last two digits; for fiscal year, fill in tax year space.
- SRCInstructions p.6 — check boxes for Fund, Trustee, or Disqualified person; Item D omitted for trustee/disqualified person.
- SRCInstructions p.7 — line 14f: section 1062 deferral, attach Form 1062 and Schedule A.
- SRCInstructions p.7 — line 15: estimated tax penalty, use Form 2220.
- SRCInstructions p.7 — line 16: tax due must be paid electronically.
- SRCForm p.2 — line 5 and 6: pay in full with return, overpayment.
Common confusion points
Does a disqualified person file a separate return?
Each person liable for tax on this form must file a separate return.
→ Check if you are a disqualified person and file a separate Form 1120-ND.
What is the due date for a fiscal year fund?
Generally, the 15th day of the 4th month after the end of its tax year.
→ Determine your tax year end and count 4 months.
Where do I file if my fund is located in a foreign country?
Use the address: Internal Revenue Service Center, P.O. Box 409101, Ogden, UT 84409.
→ Check if principal business is in a foreign country or U.S. territory.
Can I use FedEx to file to the Ogden address?
Yes, but only if the address is not a P.O. box; for P.O. box addresses, use U.S. Postal Service.
→ Verify the address type: if it's a P.O. box, don't use PDS.
Can I round off some amounts and not others?
No, you must either round off all amounts or use cents for all.
→ Round all amounts consistently or use cents for all.
What is the minimum penalty if I file more than 60 days late?
The lesser of the tax due or $525 (adjusted for inflation) for returns required to be filed after 2025.
→ Check the tax due; if less than $525, penalty is that amount.
Should I attach a reasonable cause statement with my return?
No, do not attach an explanation when filing; respond only if you receive a penalty notice.
→ Wait for a penalty notice before sending an explanation.
Can I use an older revision of Form 1120-ND?
Use the December 2025 revision for 2025 and subsequent years.
→ Check the revision date on the form; it should read 12-2025.
Workflow map
Related forms and next steps
Before
Current
After
Often used with
⚠ If something goes wrong
- Form 1120-ND (amended) — check 'Amended Return' in Item D to correct errors.
Questions about IRS Form 1120-ND
What is IRS Form 1120-ND used for?
This form is for nuclear decommissioning funds to report the money they receive, the income they earn, and the costs of running the fund. They also use it to figure and pay the tax on their income. People who do business with the fund in a way that is not allowed must file this form to report the special tax they owe.
Who must file IRS Form 1120-ND?
All section 468A nuclear decommissioning funds must file Form 1120-ND. A disqualified person who engages in self-dealing with the fund must also file to report the initial tax under section 4951.
What information does IRS Form 1120-ND require?
The form collects contributions received, income earned, administrative expenses, and calculates the tax on modified gross income. Part II reports the section 4951 initial taxes on self-dealing.
When is IRS Form 1120-ND due?
Generally, the fund must file by the 15th day of the 4th month after the end of its tax year. An extension of time to file can be requested by filing Form 7004 by the regular due date.
How do I complete IRS Form 1120-ND?
Complete the fund's name, EIN, and tax year in the heading. Fill in Part I with contributions, income, expenses, and compute modified gross income. If applicable, complete Part II for self-dealing taxes. Sign and date the return as an authorized trustee, or by the disqualified person if reporting self-dealing. Attach Form 2220 if an estimated tax penalty is owed.
What happens if IRS Form 1120-ND is filed incorrectly?
Failing to file on time may result in a penalty of 5% of the unpaid tax per month, up to 25%, with a minimum of $525 if more than 60 days late. Interest also applies to late payments and penalties.
Does a disqualified person file a separate return?
Each person liable for tax on this form must file a separate return. Check if you are a disqualified person and file a separate Form 1120-ND.
What is the due date for a fiscal year fund?
Generally, the 15th day of the 4th month after the end of its tax year. Determine your tax year end and count 4 months.
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