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Form 1120SM3: 1120 (Schedule M-3)
IRS Form 1120 (Schedule M-3) is used for Net Income (Loss) Reconciliation for Corporations With Total Assets of $10 Million or More. This form reconciles financial statement net income to taxable income.
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IRS Form 1120SM3 - 1120 (Schedule M-3)
IRS Form 1120 (Schedule M-3) is used for Net Income (Loss) Reconciliation for Corporations With Total Assets of $10 Million or More. This form reconciles financial statement net income to taxable income.
Risk Radar
Scan points- 1Ensure Line 1 of Schedule M-1 (if used) equals Part I, line 11 of Schedule M-3.
- 2Failing to complete all applicable questions on Part I of Schedule M-3 (Form 1120).
- 3Not providing required supporting statements for every line item on Schedule M-3 (Form 1120).
- 4Entering amounts in Parts II and III, column (a) using a different accounting method than reported on Part I, line 11.
- 5Omitting the total amount of assets/liabilities when completing lines 12a, 12b, 12c, or 12d.
Plain English
This form helps a corporation match up its reported profit or loss from its financial statements with the amount it reports as taxable income on its main tax return. It allows filers to detail how their accounting methods differ from the IRS's rules. The reconciliation shows exactly where the differences between book income and taxable income come from.
Submission Date
- Filing date: 2025-07-07 22:10:19
- 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
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What this form is for
- Use this form when a corporation has total assets of $10 Million or more and needs to reconcile its financial statement net income (loss) to taxable income for Form 1120.
- Do not use this form if the corporation's total assets are less than $10 million, unless it elects to file Schedule M-3 instead of completing Schedule M-1.
- Check Form 1120 or Form 1120-C when filing the required attachment for this schedule.
Form selector
Use this form or another form?
A U.S. Life Insurance Company files Schedule M-3
The company must complete Parts II and III of Schedule M-3 (Form 1120-L) if it is required to file or voluntarily files the return.
✓ Confirm the form being used matches the entity type.
A U.S. Property and Casualty Insurance Company files Schedule M-3
The company must complete Parts II and III of Schedule M-3 (Form 1120-PC) if it is required to file or voluntarily files the return.
✓ Confirm the form being used matches the entity type.
A consolidated tax group has total year-end assets $\$8 million but is required to file Form 1120 and its member B exceeds $50 million in assets
The group must file Schedule M-3 because its member (B) meets the asset threshold for filing.
✓ Check if the consolidated total assets are $\$8M and a member's assets exceed $\$50M.
Part I, line 11 reconciliation applies
Deadline or filing window
The requirement to file is triggered by the corporation's status regarding Form 1120 filing. No specific deadline date is provided in the excerpt; however, if an extension were filed, this form would need to accompany it.
Checklist
What you need before filling it out
Part I, Line 4a
Financial statement net income (loss) for the corporation/consolidated group · Part I of Schedule M-3 (Form 1120)
Part I, Line 11
Net income (loss) of the corporation for U.S. taxable income purposes · Part I of Schedule M-3 (Form 1120)
Total Assets Threshold
$10 Million or More · Form title and instructions
Tax-Basis Financial Statements
Tax-basis income statement/balance sheet · Instructions p.7
Nonincludible Foreign Sub-Consolidated Group
Income (loss) of each separate legal entity · Attached supporting statement
Disregarded Entity Entries
Net amounts of consolidation/elimination entries · Attached supporting statement
Before you submit
- 1Confirm the corporation's total assets meet or exceed $10 Million.
- 2Verify that the correct box (e.g., Consolidated return) is checked on Form 1120 (Schedule M-3).
- 3Ensure Part I of Schedule M-3 includes reconciliation figures from both financial statement and taxable income.
- 4If filing, confirm all supporting statements are attached to Form 1120 or Form 1120-C.
- 5Verify that if non-tax-basis statements were prepared for management/shareholders, the corporation is deemed to have them.
- 6Check that any consolidation/elimination entries not listed on Part I, line 8, are reported separately on the attached statement.
- 7Confirm the form reflects the December 2019 revision date.
How to file this form
- 1Complete Part I of Schedule M-3 (Form 1120) by entering the corporation's name, EIN, and reconciliation figures.
- 2If applicable, complete Parts II and/or III of Schedule M-3 to reconcile income from specific components or groups.
- 3Attach any necessary supporting statements detailing nonincludible foreign entities or consolidation entries.
- 4Sign and date Form 1120 (Schedule M-3) and mail it to the IRS Center at Ogden, UT 84201-0012 for proof of filing.
Known limitations
- 1Schedule M-3 (Form 1120) does not enter calculated life/non-life loss limitation or carryforward used amounts; these are entered on Form 8916.
- 2A tax-basis income statement is allowed for Schedule M-3, and a tax-basis balance sheet for Schedule L only if no non-tax-basis statements were prepared for any purpose and the records reflect only tax-basis amounts.
- 3If non-tax-basis financial statements are prepared for management, creditors, shareholders, government regulators, or any other third parties for a period ending within or with the tax year, the corporation is deemed to have those non-tax-basis statements for Schedule M-3 and Schedule L purposes.
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 dated December 2019, but the instructions referenced are from June 2025. For the latest information regarding Schedule M-3 (Form 1120), refer to IRS.gov/Form1120.
What changed or needs a fresh check
- Edition date — confirm the form revision reads December 2019.
- Instructions revision date — confirm the instructions read June 2025.
- Mailing address — ensure the filing location is Ogden, UT 84201-0012.
- Form type — verify the proper checkbox (e.g., Consolidated return) is marked on Form 1120 (Schedule M-3).
- Required attachment — confirm the form will be attached to Form 1120 or Form 1120-C.
Quick Facts
Downloads
After you file
- 1Keep a copy of the filed Form 1120 (or Form 1120-C) with all attachments, including Schedule M-3 (Form 1120).
- 2If completing through Part I only, ensure line 1 of the applicable Schedule M-1 equals line 11 of Part I of Schedule M-3.
- 3When filing a consolidated tax group, any member that files Form 1120-PC or Form 1120-L must complete Parts II and III of their respective Schedule M-3 forms.
- 4If the corporation is required to file but has less than $50 million in total assets at year-end, it must either complete Schedule M-3 entirely or use Schedule M-1 instead of completing Parts II and III.
Sources
- SRCInstructions p.1 — The purpose of Schedule M-3, Part I, is to reconcile financial statement net income (loss) for the corporation to taxable income on Form 1120, page 1, line 28.
- SRCInstructions p.1 — If required to file, the corporation must file Form 1120 and all attachments, including Schedule M-3 (Form 1120), at the IRS Center in Ogden, UT 84201-0012.
- SRCInstructions p.1 — A consolidated tax group files Form 1120; any member of that group must complete Parts II and III of their respective Schedule M-3 forms (Form 1120-PC or Form 1120-L).
- SRCInstructions p.2 — Filers with less than $50 million total assets at year-end, or those who voluntarily file without being required to, must either complete Schedule M-3 entirely or use Schedule M-1 instead of Parts II and III.
- SRCInstructions p.7 — If non-tax-basis financial statements are prepared for management, creditors, shareholders, government regulators, or any other third parties for a period ending within the tax year, the corporation is deemed to have those non-tax-basis financials for Schedule M-3 purposes.
- SRCForm p.1 — Line 12a requires entering the worldwide consolidated total assets and liabilities of all entities included in Part I, line 4a.
Common confusion points
What is the purpose of filling out Part I, line 11?
This line reports the financial statement net income (loss) for the U.S. corporation that needs reconciliation to taxable income on Form 1120, page 1, line 28.
→ Ensure this figure matches the primary net income reported elsewhere on your tax return.
Do I have to complete Parts II and III of Schedule M-3?
If you are required to file or voluntarily file, you must either complete the entire form or complete Part I and use Schedule M-1 instead of Parts II and III.
→ Verify if you meet filing requirements (asset size) before deciding on the completion method.
When can I use a tax-basis income statement?
A tax-basis income statement is allowed for Schedule M-3, provided no non-tax-basis financial statements were prepared for any purpose during the tax year.
→ If you prepared *any* non-tax-basis financials (even for management), assume you are using non-tax-basis and follow related rules.
How do I handle nonincludible foreign entities?
For those accounted for on Part I, line 4a (equity method), adjust in Part I, line 8 by removing their financial net income (loss) from the total.
→ Attach a supporting statement detailing the name, EIN, and the specific net income (loss) being removed.
What if my U.S. entity is nonincludible?
You must attach a supporting statement for those accounted for on Part I, line 4a, showing their name, EIN, and net income (loss), which are then removed in Part I, line 6.
→ Ensure you report the income/loss without regard to consolidation or elimination entries.
What is the filing address?
The corporation must file Form 1120 and all attachments, including Schedule M-3 (Form 1120), at the IRS Center in Ogden, UT.
→ Confirm the mailing address: Department of the Treasury Internal Revenue Service Center, Ogden, UT 84201-0012.
Workflow map
Related forms and next steps
Before
Current
After
Often used with
⚠ If something goes wrong
- Form 8916 — This form is where calculated life/non-life loss limitation or carryforward used amounts are entered.
Questions about IRS Form 1120SM3
What is IRS Form 1120SM3 used for?
This form helps a corporation match up its reported profit or loss from its financial statements with the amount it reports as taxable income on its main tax return. It allows filers to detail how their accounting methods differ from the IRS's rules. The reconciliation shows exactly where the differences between book income and taxable income come from.
Who must file IRS Form 1120SM3?
A domestic corporation or group of corporations required to file Form 1120 must complete Schedule M-3 (Form 1120). Furthermore, filers with less than $50 million total assets who are required to file it must complete it entirely.
What information does IRS Form 1120SM3 require?
Part I asks specific questions about the corporation's financial statements and reconciles net income (loss) for U.S. taxable income purposes. Parts II and III reconcile this figure further to the final taxable income on Form 1120, page 1, line 28.
When is IRS Form 1120SM3 due?
The instructions do not specify a filing deadline date or period; rather, they describe when the form is required to be filed (i.e., if the corporation is required to file Form 1120).
Where do I file IRS Form 1120SM3?
If the corporation files Form 1120 (or Form 1120-C), it must send all attachments, including Schedule M-3 (Form 1120), to: Department of the Treasury Internal Revenue Service Center, Ogden, UT 84201-0012.
How do I complete IRS Form 1120SM3?
All corporations filing Schedule M-3 (Form 1120) must complete Part I first. Then, Parts II and III require completing all columns for each entity included in the consolidated return. All detailed statements for Part II and Part III must be attached when filing the form.
What happens if IRS Form 1120SM3 is filed incorrectly?
While the source does not detail a specific penalty for incorrect completion, failure to properly complete all applicable questions and provide required supporting statements means the reconciliation is incomplete or unsupported.
What is the purpose of filling out Part I, line 11?
This line reports the financial statement net income (loss) for the U.S. corporation that needs reconciliation to taxable income on Form 1120, page 1, line 28. Ensure this figure matches the primary net income reported elsewhere on your tax return.
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