To report MLP income on a U.S. federal tax return, use the partnership’s Schedule K-1 (Form 1065) and its statements—not just the cash distribution shown by your broker. A distribution is not automatically taxable income: your K-1 reports your share of partnership tax items, while cash distributions generally affect your outside basis. Keep those records distinct, and account separately for a sale of units or a distribution of property.
Start with the K-1 package, not the cash total
A master limited partnership (MLP) is generally taxed as a partnership for federal income-tax purposes. It provides each partner a Schedule K-1 (Form 1065), which reports that partner’s share of income, deductions, credits, and other tax items. You may have to report allocated income even if the partnership paid you no cash; conversely, cash received is not automatically the amount of taxable income to report.
Gather the K-1 and every attached statement or supplemental schedule. Read the tax-year instructions for the form and follow each box, code, and statement: there is no single “MLP distributions” line that safely replaces that review. The IRS generally says to keep the K-1 with your records rather than attach it to Form 1040, unless an instruction specifically requires attachment. IRS Partner’s Instructions for Schedule K-1 (Form 1065) (2025)
Report each K-1 item according to its tax character
Partnership items generally retain their character when reported by a partner. As a broad guide, partnership ordinary business income is generally reported on Schedule E, while a partner’s share of capital gains is reported as directed by the Schedule D instructions. These are not universal instructions for every K-1 entry: use the applicable box, code, attached detail, and current individual-return instructions to determine where each item goes. IRS Publication 525 (2025), Taxable and Nontaxable Income
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Track outside basis separately from cash distributions
Outside basis is your adjusted tax basis in the partnership interest. Maintain a year-by-year record: in general, basis increases with your share of partnership income, certain contributions, and increases in your share of partnership liabilities. It generally decreases for money or property distributed, partnership losses, certain expenses, and decreases in your share of liabilities. The full adjustment rules can be more involved than this summary; use the K-1 details and IRS basis guidance rather than treating one cash amount as a complete calculation. IRS Publication 541 (12/2025), Partnerships
A cash distribution generally reduces basis; it is not necessarily current taxable income in the same amount. If distributions and other basis decreases exceed available basis, gain may result. Basis generally cannot fall below zero under the applicable adjustment rules.
Do not use Schedule K-1 item L, the capital-account analysis, as your outside basis. The IRS says item L is based on partnership books and records and cannot be used to determine a partner’s adjusted basis. The partner is responsible for retaining the information needed to figure basis; the K-1 instructions include a partner basis worksheet. IRS Partner’s Instructions for Schedule K-1 (Form 1065) (2025)
If you sold units, calculate a separate disposition
A sale is not simply the amount deposited by your broker minus the original purchase price. Under IRS Publication 541, amount realized generally includes cash received and relief from partnership liabilities; compare it with adjusted basis to determine gain or loss. A sale or exchange of a partnership interest usually produces capital gain or loss, but the portion attributable to unrealized receivables or inventory items may be ordinary income.
Use the MLP’s sale information, if provided, along with your basis records, and reconcile it with the broker’s proceeds and displayed basis. For 2025 K-1 guidance, the IRS generally points partners reporting gain from a distribution exceeding adjusted basis to Form 8949 and Schedule D, while recognizing that unrealized receivables or inventory can receive ordinary-income treatment. The specific reporting depends on the partnership’s information and your facts. IRS Partner’s Instructions for Schedule K-1 (Form 1065) (2025) IRS Publication 541 (12/2025), Partnerships
Check whether a property distribution triggers Form 7217
Routine money distributions alone generally do not require Form 7217. For tax years beginning in 2024 and later, a partner receiving certain actual property distributions may need to file a Form 7217 for each distribution date. The IRS says not to file the form when the distribution consists only of money or marketable securities treated as money. For tax year 2025 and later, updated guidance describes new Schedule K-1 box 19 codes and related information used for some Form 7217 entries. Follow the current form instructions and the partnership’s statements for your specific distribution. IRS update to Form 7217 instructions
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Consider help from a tax professional familiar with partnership returns if you sold units, received property rather than cash, have a zero-basis or excess-distribution concern, or need to determine state filing obligations. The federal rules described here do not determine every state’s treatment, and an MLP’s own allocations and supplemental schedules matter to the calculation.
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