IRS Form 1065

Form 1065 Overview

If your business has two or more owners (whether that’s a general partnership, a limited partnership, or an LLC taxed as a partnership) Form 1065 is your annual tax return. Every year. No exceptions!

And yet it’s one of the most confusing forms the IRS issues, because it operates differently from almost every other return. Your partnership doesn’t actually pay taxes on the Form 1065. The form is informational — it tells the IRS how income and losses are distributed among your partners, so each partner can report their share on their personal return. The actual tax bill lands with the individuals, not the business.

That distinction matters, and so does every section of this form. Miss something or misclassify an item, and you’re not just looking at a penalty on the business — you’re potentially creating discrepancies on every partner’s personal return.

This guide covers everything: what Form 1065 is, who has to file it, every section explained in plain language, what to download from the IRS, and what to gather before you start. If you want to hand this off to a tax professional, the checklist at the end tells you exactly what to bring them.

What Is Form 1065?

Form 1065, officially titled “U.S. Return of Partnership Income,” is the annual informational tax return filed by partnerships with the IRS. Per TurboTax, it’s used to report the partnership’s income, deductions, gains, losses, taxes, and payments during the tax year, and to prepare Schedule K-1s for each partner.

The key word is informational. Unlike Form 1120 (C-corporation return) or Form 1040 (personal return), Form 1065 doesn’t come with a tax bill for the business itself. Partnerships are pass-through entities — income and losses flow through to the partners, who pay taxes at the individual level.

Think of Form 1065 as the source document. It establishes the totals. The Schedule K-1s (one per partner) distribute those totals to each owner. Each owner then takes their K-1 and plugs those numbers into their personal return.

Who Has to File Form 1065?

Per the IRS, any domestic partnership headquartered in the United States is required to file Form 1065 each year, unless it neither receives income nor incurs any expenses that qualify for deductions or credits.

That covers a wider range of business structures than many owners realize. The following are all required to file:

General partnerships — The most basic structure. Two or more people carrying on a business together, sharing profits and losses, with no formal liability protection for the partners. If you shook hands and started a business with a partner without forming a formal legal entity, you likely have a general partnership.

Limited partnerships (LPs) — These have at least one general partner (who manages the business and bears unlimited liability) and at least one limited partner (who is a passive investor with liability limited to their investment). Common in real estate and investment vehicles.

Limited liability partnerships (LLPs) — Often used by professional service firms — law firms, accounting firms, medical practices. Partners have liability protection from each other’s negligence while still being taxed as a partnership.

Multi-member LLCs (not elected as corporations) — This is where a lot of small business owners get surprised. If your LLC has two or more members and you haven’t filed an election to be taxed as an S-corporation or C-corporation, the IRS treats it as a partnership by default. That means Form 1065.

Foreign partnerships with U.S. income — Foreign partnerships with more than $20,000 in annual U.S.-source income, or those who earn more than 1% of their income from U.S. sources, are also required to file.

Who doesn’t have to file: Single-member LLCs (filed on Schedule C of the owner’s personal return), S-corporations (Form 1120-S), C-corporations (Form 1120), and sole proprietorships.

Due Dates and Extensions

Standard deadline: Form 1065 is due by the 15th day of the third month after the end of the partnership’s tax year. For calendar-year partnerships (January through December), that means March 15. For the 2025 tax year, the deadline was March 16, 2026, because March 15 fell on a Sunday.

If your partnership operates on a fiscal year rather than a calendar year, the due date shifts accordingly. A partnership with a fiscal year ending June 30, for example, would have a September 15 deadline.

Extension: You can get an automatic six-month extension by filing Form 7004 (Application for Automatic Extension of Time to File) by the original due date. For calendar-year partnerships, this pushes the deadline to September 15. Form 7004 can be filed electronically.

Important: the extension applies to filing, not payment. Any taxes owed at the partner level are still due on the original due date.

Electronic filing requirement: Partnerships with more than 100 partners are required to file Form 1065 electronically. Smaller partnerships may file by mail or electronically.

Late filing penalty: If you file late and don’t have an approved extension, the IRS charges a penalty of $235 per partner per month (or part of a month) the return is late, up to 12 months. On a partnership with 10 partners, that’s $2,350 per month. Filing on time, even if you can’t pay, is always the right move.

Before you open the form, gather everything on this list. Missing any of these mid-preparation wastes time and increases the chance of errors.

Business information:

• Partnership name, address, and Employer Identification Number (EIN)
• Principal business activity and Business Code Number (found in the Form 1065 instructions)
• Date business started
• Accounting method (cash, accrual, or other)
• Number of partners

Financial statements:

• Profit and loss (P&L) statement for the full tax year
• Balance sheet as of the beginning and end of the tax year
• Cost of goods sold information (if the partnership sells physical products)
• Records of all deductible business expenses

Partner information (for each partner):

• Full legal name and address
• Social Security Number (for individuals) or EIN (for business partners)
• Ownership percentage / profit and loss sharing ratio
• Capital contributions made during the year
• Distributions received during the year

Other items that may apply:

• Prior year Form 1065 (helpful for reference)
• Depreciation schedules for partnership assets
• Records of any guaranteed payments to partners
• Form 1099s issued to contractors ($600 or more)
• Any international or foreign partner information
• Records of any property distributions

Need help tracking everything down? Download Boxelder’s Form 1065 Pre-Filing Checklist Below.

How to Fill Out Form 1065: Section by Section

Page 1: General Information (Boxes A through K)

The top of page 1 collects basic identifying information about your partnership.

Box A: Enter your principal business activity (for example: “Consulting,” “Construction,” “Real Estate Rental”).

Box B: Enter your principal product or service (more specific than Box A — for example: “Software Development” or “Residential Remodeling”).

Box C: Enter your Business Code Number. This is a six-digit code from the NAICS (North American Industry Classification System). You can find the full list in the Form 1065 instructions.

Box D: Your Employer Identification Number (EIN). If you don’t have one, you need to apply for one through the IRS before filing. The EIN is your business’s tax ID.

Box E: The date your partnership began. If this is not your first year filing, this is still the original start date — not the current year.

Box F: Total assets at the end of the tax year, based on your accounting method. If your partnership qualifies for the small partnership exception (receipts under $250,000 AND total assets under $1 million), you may not need to complete this box.

Boxes G and H: Indicate the type of return (initial, final, amended, or name change) and your accounting method (cash, accrual, or other). Most small partnerships use the cash method.

Box I: The number of Schedules K-1 you’re attaching. Every partner gets one — this number must match your partner count exactly.Box J: Check if Schedule C or M-3 is attached, if applicable.

Page 1: Income (Lines 1–8)

These lines capture all income the partnership earned during the year.

Line 1a: Gross receipts or sales — the total revenue before any returns or allowances.

Line 1b: Returns and allowances — money refunded to customers or credits issued.

Line 1c: Subtracts line 1b from 1a to get net sales.

Line 2: Cost of goods sold (if applicable). The details for this calculation are on Schedule A, which is at the bottom of page 1.

Line 3: Gross profit (line 1c minus line 2).

Line 4: Ordinary income or loss from other partnerships, estates, or trusts.

Line 5: Net farm profit or loss.

Line 6: Net gain or loss from Form 4797 (sales of business property).

Line 7: Other income or loss (attach a statement).

Line 8: Total income — the sum of lines 3 through 7.

Page 1: Deductions (Lines 9–21)

These lines capture the partnership’s deductible business expenses.

Line 9: Salaries and wages (not including guaranteed payments to partners).

Line 10: Guaranteed payments to partners. These are payments made to partners for services or use of capital, regardless of whether the partnership has income. They’re deductible here and then also flow through to Schedule K.

Line 11: Repairs and maintenance.

Line 12: Bad debts.

Line 13: Rent.

Line 14: Taxes and licenses (not including income taxes).

Line 15: Interest expense.

Line 16a–b: Depreciation and Section 179 deductions.

Line 17: Depletion.

Line 18: Retirement plan contributions.

Line 19: Employee benefit programs.

Line 20: Other deductions (attach a detailed statement listing each item).

Line 21: Total deductions — the sum of lines 9 through 20.

Page 1: Tax and Payment / Ordinary Business Income (Lines 22–30)

Line 22: Ordinary business income (or loss) — this is line 8 minus line 21. This is the core number that flows through to partners.

Lines 23–30: Cover any additional taxes owed at the partnership level, including self-employment taxes, interest due under IRC Section 453(A)(c), and payments made on behalf of partners. Most smaller partnerships won’t have entries here.

Who Has to File Form 1065?

Pages 2–3: Schedule B (Questions 1–25)

Schedule B is a series of yes/no questions covering a range of compliance and reporting topics. Read each one carefully — your answers determine whether additional schedules are required.

Key questions to understand:

Question 1: What type of entity is filing? (General partnership, limited partnership, LLC, etc.)

Question 4 (the small partnership exception): If your total receipts for the year were less than $250,000 AND total assets were less than $1 million AND you’ve attached Schedule K-1s to the return, you may be exempt from completing Schedules L, M-1, and M-2 on page 5. Check all four conditions carefully.

Questions about foreign partners, 1099 requirements, and other forms: Several questions ask whether you had foreign partners, issued 1099s, made distributions, or have other special reporting obligations. Answer honestly — these questions determine what additional forms you need to attach.

Page 4: Schedule K

Schedule K is a summary of all distributable income and expense items — the totals that will be divided among partners on their individual K-1s. Think of it as the aggregate before the split.

Schedule K covers:

Income and loss items: Ordinary business income (from page 1), net rental real estate income, other rental income, interest income, dividend income, royalties, capital gains, and other income items.

Deductions: Section 179 deduction, charitable contributions, and other deductions passed through to partners.

Credits: Any applicable tax credits that flow through to partners.

Self-employment earnings: Partners working in the business are considered self-employed, not employees, and their self-employment earnings are reported here.

Other items: Alternative minimum tax adjustments, tax-exempt income, nondeductible expenses, distributions made to partners, and other balance sheet items.

The sum of all partners’ Schedule K-1s must equal the totals on Schedule K. If they don’t match, the return has errors.

Page 5: Schedules L, M-1, and M-2

These schedules are required unless your partnership qualifies for the small partnership exception under Schedule B, Question 4.

Schedule L — Balance Sheet per Books: A two-column balance sheet showing assets, liabilities, and partners’ capital at the beginning and end of the tax year. The numbers should come directly from your financial statements.

Schedule M-1 — Reconciliation of Income (Loss) per Books with Income (Loss) per Return: Because your books and your tax return often treat income and expenses differently, M-1 reconciles the two. Common differences include tax depreciation vs. book depreciation, meals and entertainment (50% deductible for tax, 100% on books), and tax-exempt income recorded on books but not on the return.

Schedule M-2 — Analysis of Partners’ Capital Accounts: Shows how partner capital accounts changed over the year — beginning balances, contributions, current-year income or loss, withdrawals and distributions, and ending balances. This must be completed using the tax-basis method.

Schedule K-1: One for Every Partner

Once Form 1065 is complete, you’ll prepare a Schedule K-1 for each partner. The K-1 is the document each partner uses to report their share of the partnership’s income, losses, deductions, and credits on their personal tax return.

Each K-1 includes:

Part I — Information about the partnership: The partnership’s EIN, address, and whether it’s a publicly traded partnership.

Part II — Information about the partner: The partner’s name, address, and identifying number; their type (general or limited partner; individual, corporation, estate, etc.); whether they’re a foreign partner; and their beginning and ending ownership percentages.

Part III — Partner’s share of income, deductions, credits, and other items: This is the heart of the K-1. It covers the partner’s share of:

• Ordinary business income or loss (Box 1)
• Net rental real estate income (Box 2)
• Other rental income (Box 3)
• Guaranteed payments (Box 4)
• Interest income (Box 5)
• Dividends (Box 6)
• Royalties (Box 7)
• Capital gains and losses (Boxes 8–9)
• Section 179 deductions (Box 12)
• Charitable contributions (Box 13)
• Self-employment earnings (Box 14)
• Credits (Box 15)
• Foreign transactions (Boxes 16–17)
• Alternative minimum tax items (Box 18)
• Tax-exempt income and nondeductible expenses (Box 18)
• Distributions (Box 19)
• Other information (Box 20)

Delivering K-1s: The partnership must provide each partner with their K-1 by the Form 1065 due date (including any extension). Partners need their K-1 to file their personal return — late K-1s create a cascading problem across every partner’s tax filing.

Per the IRS, the partnership files a copy of each K-1 with the IRS as part of Form 1065, and also provides a copy to each partner for their personal return.

How to File Form 1065

Download the official form: Form 1065 is available free from the IRS at IRS.gov/Form1065. The 2025 instructions are also available there.

E-filing: Partnerships with 100 or more partners are required to file electronically. Smaller partnerships may use IRS-approved tax software or a tax professional to e-file. Common options include TurboTax Business, TaxAct, and professional tax software. E-filing is faster, generates immediate confirmation, and reduces the risk of processing errors.

Filing by mail: If filing by mail, the address depends on your state and whether you’re including a payment. The IRS provides a current list of mailing addresses in the Form 1065 instructions. Note: as of September 2025, the IRS has phased out paper check payments for most returns. Verify current payment options before mailing.

Electronic signature: Form 1065 is not considered a return unless it’s signed by a partner or LLC member. E-filed returns include an electronic signature requirement; paper returns must be physically signed.

Common Mistakes to Avoid

Filing late without an extension. The penalty is $235 per partner per month. File Form 7004 if you need more time — it’s automatic and takes minutes.

Not delivering K-1s on time. Partners can’t file their personal returns without their K-1. Late K-1s create downstream filing problems for everyone.

Misclassifying guaranteed payments. Guaranteed payments to partners are deductible on page 1 (line 10) and also flow through Schedule K. Reporting them only in one place creates a discrepancy.

Using the wrong accounting method. If your books use accrual but your tax return uses cash (or vice versa), Schedule M-1 captures the reconciliation — but only if you complete it correctly.

Skipping Schedule M-2. Many small partnerships skip this schedule thinking they qualify for the small partnership exception. The exception requires all four conditions of Schedule B, Question 4 to be met. If any one is missed, M-2 is required.

Mismatched K-1 totals. The sum of all partners’ K-1 shares must match the Schedule K totals. Any discrepancy will trigger IRS scrutiny.Forgetting state returns. Most states require a separate state partnership return. Filing deadlines and forms vary by state. Colorado, Kansas, and Ohio all have their own requirements — verify with the applicable state Department of Revenue.

Free Downloads

Download 1: Form 1065 Pre-Filing Checklist A printable checklist of every document, number, and piece of information you need to gather before completing Form 1065. Organized by section — business info, financial statements, partner information, and special situations. [Download the checklist →] (link to Boxelder’s hosted PDF)

Download 2: Form 1065 Line-by-Line Completion Guide A PDF companion to this article that walks through every section and line of Form 1065 in plain language, with notes on what to enter and where to find the information. Formatted for printing and annotating alongside the actual form. [Download the guide →] (link to Boxelder’s hosted PDF)

Download 3: Official IRS Form 1065 (2025) The official form directly from the IRS, free to download and print. The 2025 Form 1065 covers the 2025 tax year for calendar-year partnerships, due March 15, 2026 (or September 15 with an extension). Download from IRS.gov →

Do You Need a Tax Professional for Form 1065?

For very simple partnerships — two partners, clean books, no employees, no international transactions — a capable business owner or bookkeeper may be able to complete Form 1065 using software.

For most partnerships, professional preparation is worth it. The form has multiple schedules, and errors compound: a mistake on Schedule K flows through to every partner’s K-1, which then flows through to every partner’s personal return. The downstream cost of errors usually exceeds the cost of professional preparation.

Situations where professional help is particularly valuable:

• Any year with significant change (new partners, departing partners, property contributions or distributions)
• Partnerships with foreign partners or foreign-source income
• Multi-state operations
• Partnerships with employees
• LLCs that haven’t confirmed their federal tax classification
• Any prior year where returns were not filed

The Bottom Line

Form 1065 is a five-page informational return that requires accurate financial records, a clear understanding of your partnership’s ownership structure, and a complete set of Schedule K-1s for every partner.

It’s not a form you want to rush, guess on, or forget to file. The penalty structure, the downstream impact on partner returns, and the IRS’s matching process between K-1s and personal returns make accuracy non-negotiable.

If you want to make sure it’s done right — or if you’re a partnership that’s missed prior-year filings and needs to get caught up — Boxelder’s licensed tax professionals work with partnerships and multi-member LLCs across Colorado, Kansas, Ohio, and 40+ other states.

Schedule a free consultation with Boxelder.