IRS Form 1065 (Schedule C)

IRS Form 1065 (Schedule C) – Partnerships filing Form 1065 (U.S. Return of Partnership Income) that must (or choose to) attach Schedule M-3 (Net Income (Loss) Reconciliation for Certain Partnerships) often need Schedule C (Form 1065) — officially titled “Additional Information for Schedule M-3 Filers.” This one-page schedule answers targeted IRS questions about transfers, allocations, intangibles, and accounting changes.

This guide, based directly on current IRS resources (including the December 2014 revision of Schedule C still in use for 2025 returns, the 2025 Instructions for Form 1065, and Instructions for Schedule M-3), explains who must file, purpose, line-by-line instructions, filing rules, and best practices. Use it to avoid filing errors, delays, or correspondence from the IRS.

Download the official form here: Schedule C (Form 1065) PDF

What Is Schedule C (Form 1065)?

Schedule C collects supplemental “yes/no” disclosures from partnerships filing Schedule M-3. The IRS uses this information to cross-check financial statement reconciliations, related-party transactions, and accounting consistency.

Attach it to Form 1065 whenever required.
On page 1 of Form 1065, check box J (“Check if Schedules C and M-3 are attached”).
The form has Part I (one question on transfers) and Part II (five questions on allocations, intangibles, and accounting changes).

It is not the same as Schedule C (Form 1040) for sole proprietors.

Who Must File Schedule C with Form 1065?

General rule (2025 Instructions for Form 1065): Any partnership that files Schedule M-3 must also file Schedule C.

Important exceptions (still in effect for tax years ending on or after December 31, 2014):

Partnerships are NOT required to file Schedule C if they meet one of these:

Required to file Schedule M-3 and have less than $50 million in total assets at year-end, OR
Not required to file Schedule M-3 but voluntarily file it.

Note: Even in these cases, many partnerships complete Schedule C voluntarily for clean compliance or if they file a full Schedule M-3 (Parts II and III).

When is Schedule M-3 itself required? (Triggers potential Schedule C requirement)

A partnership must file Schedule M-3 if any of these apply (Instructions for Schedule M-3):

Total assets at year-end (Schedule L, line 14, column d) ≥ $10 million
Adjusted total assets ≥ $10 million
Total receipts ≥ $35 million
A “reportable entity partner” owns or is deemed to own ≥50% interest in capital, profit, or loss on any day

Partnerships below these thresholds can file Schedule M-3 voluntarily.

Where to file: If Schedule M-3 (and thus potentially Schedule C) is attached, mail to the Ogden, UT IRS center (see 2025 Form 1065 instructions, page 6).

Purpose of Schedule C – Why the IRS Asks These Questions?

Schedule M-3 reconciles book income to tax income. Schedule C flags items that could affect that reconciliation or indicate related-party issues:

Disguised-sale transfers
Special allocations from tiered partnerships
Related-party intangible transactions (potential section 267/707 scrutiny)
Accounting principle or method changes (which may require Form 3115 or financial restatements)

Accurate answers help the IRS process large and complex partnership returns faster and reduce audit risk.

Line-by-Line Instructions for Schedule C (Form 1065)

Header: Enter the partnership name and EIN exactly as on Form 1065.

Part I – Transfers Between Partnership and Partners

Question 1: “At any time during the tax year, were there any transfers between the partnership and its partners subject to the disclosure requirements of Regulations section 1.707-8?”

Answer “Yes” if any transfers meet the disguised-sale rules (e.g., partner contributes property and receives a distribution within 2 years, or assumes debt in certain ways).
Disclosure: The transferor partner (or the partnership if multiple partners) must disclose on Form 8275 (or attached statement) attached to the transferor’s return.
See Regulations §1.707-8 for the three main triggers (contribution + distribution, debt incurred, etc.).

Part II – Allocations and Intangible Assets

Question 2: “Does any amount reported on Schedule M-3, Part II, lines 7 or 8, column (d), reflect allocations to this partnership from another partnership of income, gain, loss, deduction, or credit that are disproportionate to this partnership’s share of capital in that partnership or its ratio for sharing other items of that partnership?”

Answer “Yes” for special allocations (e.g., 99% depreciation to one partner while profits/losses are 50/50).
Example in instructions: Partnership PB allocates 99% depreciation to partner P but splits other items 50/50 → P answers “Yes.”

Question 3: “At any time during the tax year, did the partnership sell, exchange, or transfer any interest in an intangible asset to a related person as defined in sections 267(b) and 707(b)(1)?”

Question 4: “At any time during the tax year, did the partnership acquire any interest in an intangible asset from a related person as defined in sections 267(b) and 707(b)(1)?”

Related persons include family members, controlled entities, and partners under constructive ownership rules.
These questions flag potential section 197 intangible issues or loss-disallowance rules.

Question 5: “At any time during the tax year, did the partnership make any change in accounting principle for financial accounting purposes?”

“Change in accounting principle” follows FAS 154 (now ASC 250) — switching from one GAAP method to another (e.g., LIFO to FIFO, or changing depreciation method for books).
Answer “Yes” only if the change affected (or is expected to affect) the amount of income reported on financial statements.

Question 6: “At any time during the tax year, did the partnership make any change in a method of accounting for U.S. income tax purposes?”

Answer “Yes” if the partnership filed (or should have filed) Form 3115 for an automatic or non-automatic accounting-method change (e.g., cash to accrual, UNICAP changes, revenue recognition).
Attach a copy of Form 3115 if required.

Step-by-Step Filing Checklist

Determine if Schedule M-3 is required or voluntarily filed.
Check asset/receipt thresholds and reportable-entity-partner rules.
Complete Schedule C if required (or desired).
Attach Schedule C and Schedule M-3 to Form 1065.
Check box J on page 1 of Form 1065.
E-file or mail to the correct IRS center (Ogden if M-3 attached).
Retain all supporting documentation (disclosure statements, Form 3115, related-party calculations) for at least 3–6 years.

Common Questions (FAQ)

Q: My partnership has $40 million in assets and is required to file Schedule M-3. Do I need Schedule C?
A: No — under the < $50 million asset exception (if you meet the conditions in the instructions).
Q: We voluntarily file Schedule M-3 even though we are below the thresholds. Do we need Schedule C?
A: Generally no, but you may choose to file it.
Q: Where can I find the latest instructions?
A: 2025 Instructions for Form 1065 (i1065.pdf) and the dedicated Schedule C instructions (still current from 12/2014).
Q: Is Schedule C required every year Schedule M-3 is filed?
A: Yes, unless you qualify for one of the exceptions above.

Pro Tips for Accurate Filing

Double-check related-party definitions (sections 267(b) and 707(b)(1)) — they are broad.
Coordinate with your tax software — most major packages (UltraTax, Lacerte, etc.) auto-populate Schedule C when M-3 is selected.
If “Yes” on any question, attach clear explanations or statements to avoid IRS “incomplete return” notices.
Large partnerships ($50M+ assets) almost always file the full Schedule M-3 + Schedule C — plan for this in your tax calendar.

Final Thoughts

Schedule C (Form 1065) may be short, but it plays a critical role in the IRS’s review of complex partnership returns that include Schedule M-3. Completing it correctly demonstrates strong compliance and can prevent costly delays or examinations.

Always consult the official IRS PDFs and your tax professional for your specific situation. Tax law and thresholds can change, so verify the latest at IRS.gov/Form1065 before filing.

Official IRS Resources (all current as of February 2026):

Need help with a specific question on your return? The IRS Taxpayer Advocate Service or a qualified CPA/EA familiar with partnership taxation can provide personalized assistance.

This article is for informational purposes only and is not tax or legal advice. Always refer to the official IRS instructions for your tax year.