Understanding Form 1065: Partnership Income Tax Return
- Sonia Lee
- Sep 8, 2025
- 3 min read
Updated: Feb 27

What is Form 1065?
Form 1065 is an information return that partnerships file to report their income, gains, losses, deductions, credits, and other items. Partnerships do not pay federal income tax. Instead, these items are "passed through" to partners, who report them on their personal tax returns.
Who Must File?
General Partnerships
Limited Partnerships
Limited Liability Partnerships
Due Date
The due date for filing Form 1065 is March 15. If this date falls on a weekend or holiday, the deadline is the next business day.
Extensions
To request an automatic 6-month extension, file Form 7004. For partnerships with a calendar year ending December 31, the deadline for filing with an extension is September 15 (or the next business day if it falls on a weekend or holiday).
Form 1065 Structure
Form 1065 consists of several key sections:
Page 1: Income, Deductions, and Tax Payments
Schedule B: Other Information
Schedule K: Partners' Distributive Share Items
Schedule L: Balance Sheet
Schedule M-1: Reconciliation of Income
Schedule M-2: Analysis of Partners' Capital Accounts
Page 1: Income, Deductions, and Tax Information
This section includes header information such as the partnership name, address, EIN, date established, and accounting method.
Schedule B: Other Information
This schedule contains yes/no questions about:
Type of entity
Accounting methods
Foreign accounts or activities
Ownership and partners
Payments to foreign persons or related party transactions
Schedule K: Partners' Distributive Share Items
This schedule summarizes total partnership items allocated to partners, including:
Ordinary business income (loss)
Net rental real estate income/loss
Other rental income/loss
Interest, dividends, capital gains/losses
Deductions: Section 179, charitable contributions, other deductions
Foreign transactions
Alternative Minimum Tax (AMT) items
Credits and other tax items
Schedule L: Balance Sheet
This section shows assets, liabilities, and partners' capital accounts at the beginning and end of the year. It must reconcile with the partnership's books.
Schedule M-1: Reconciliation of Income
This schedule reconciles book income to tax income. It includes adjustments for permanent and temporary differences between accounting records and taxable income.
Schedule M-2: Analysis of Partners' Capital Accounts
This schedule tracks changes in partners' capital during the year, including:
Beginning capital balance
Contributions
Net income/loss
Distributions
Ending capital balance
Schedule K-1 (Form 1065)
This form is issued to each partner to report their share of income, deductions, credits, and other items. Partners use K-1 to report these items on their personal tax returns (Form 1040).
Partnership Basis
What is Partnership Basis?
The partnership basis is the tax value a partner has in their investment in a partnership. It determines:
How much loss a partner can deduct on their personal tax return.
How much gain or loss is recognized when a partner sells or disposes of their interest.
How distributions (cash or property) are taxed.
Initial Basis
The initial basis includes:
Initial money and property contributed by a partner to the partnership.
If you invest cash, your basis increases by the cash amount.
If you contribute property, your basis is generally the adjusted tax basis of the property.
Adjustments to Basis
Transactions that occur after the initial investment lead to annual changes in the partner's basis. These include:
Increases
Share of partnership income (ordinary business income, rental income, interest, dividends, capital gains).
Additional capital contributions by the partner.
Decreases
Share of partnership losses (limited to basis).
Distributions of cash or property from the partnership.
Share of deductions (i.e., Section 179).
Uses of Basis in Partnership
Loss Limitation: A partner can deduct losses only up to his/her basis in the partnership.
Distribution Taxability: Cash distributions generally reduce basis and are not taxable if they don't exceed basis. Distributions in excess of basis are taxable as capital gains.
Sale or Transfer of Partnership Interest: Gain or loss is calculated as selling price minus adjusted basis.
Disclaimer
The information provided in this material is for general informational purposes only and should not be considered tax, legal, or accounting advice. Every taxpayer’s situation is unique, and laws or regulations may change over time. You should consult with a qualified tax professional, attorney, or accountant before making decisions based on this information.
If you need assistance in preparing your tax returns, please click the link below.




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