Form 1065 and Schedule K-1 Checklist

Partnership returns carry more moving parts than almost any other federal return: the agreement drives the allocations, every partner receives a Schedule K-1, and a late return is penalised per partner. This checklist follows the order a preparer and a reviewer actually work in.

Dates and penalties

• Form 1065 is due on the 15th day of the third month after the tax year ends: 15 March for a calendar year partnership, moved to the next business day when it falls on a weekend or legal holiday.
• Form 7004 gives an automatic six month extension, to 15 September for a calendar year partnership.
• Schedules K-1 must be furnished to partners by the due date of the return, including extensions.
• The penalty for a late or incomplete partnership return is a dollar amount per partner for each month or part of a month, for up to 12 months. For returns required to be filed in 2027 that amount is $260 (Rev. Proc. 2025-32).
• Failing to furnish a correct Schedule K-1 is a separate penalty, $340 per statement under the general rule for statements due in 2027.

Before preparation starts

1. The partnership agreement and every amendment, including allocation, distribution and guaranteed payment terms.
2. The prior year return, Schedules K-1 and any carryovers.
3. A trial balance that ties to the financial statements, with a book to tax reconciliation.
4. Partner changes during the year: admissions, withdrawals, transfers and any section 754 election in place.
5. Partnership level debt, so liabilities can be allocated to partners.
6. States where the partnership operates, and any pass through entity tax election the firm has made.

Preparation

• Report partner capital accounts on the tax basis method the instructions require.
• Apply special allocations and section 704(c) allocations exactly as the agreement provides.
• Separate guaranteed payments and figure net earnings from self employment for each partner.
• Report the information partners need for the qualified business income deduction.
• Complete Schedule M-3 instead of Schedule M-1 when total assets at the end of the year are $10 million or more.
• Answer Schedule B carefully. A partnership that meets all four conditions of question 4 (receipts and assets under the stated limits, K-1s filed and furnished on time, and no Schedule M-3) is not required to complete Schedules L, M-1 and M-2.
• Complete Schedule B-1 when a partner owns 50 percent or more of the partnership.
• Decide on Schedules K-2 and K-3. The domestic filing exception relieves a partnership with no or limited foreign activity and only United States partners, provided the conditions in the instructions are met, including that no partner requests Schedule K-3 by one month before filing.
• Designate the partnership representative, or elect out of the centralized audit regime on Schedule B-2 if the partnership is eligible.

Filing

• A partnership with more than 100 partners must file electronically.
• A partnership required to file 10 or more returns of any type during the calendar year must also file electronically.
• State composite and nonresident withholding returns follow the federal return.

Review questions

1. Do the ending capital accounts roll forward from last year, with every change explained?
2. Do the allocations match the agreement, partner by partner?
3. Do total K-1 amounts tie to Schedule K?
4. Has every partner's address, identifying number and ownership percentage been confirmed?
5. Is the extension, if any, filed before the original due date?

Sources

• Instructions for Form 1065
• Rev. Proc. 2025-32, sections .55 and .58
• IRC sections 6031, 6698 and 6722

General information for accounting professionals, not legal or tax advice. Confirm requirements against current law and IRS guidance.