Key takeaways
- A partnership files Form 1065 unless it neither received income nor incurred any expenditure treated as a deduction or credit for the year.
- For a calendar-year partnership, the 2026 Form 1065 is due March 15, 2027.
- Form 7004 gives an automatic 6-month extension to file, and it does not extend the time to pay.
- Section 6722 sets a $340 penalty per late or incorrect Schedule K-1 for statements required to be furnished in 2026 and in 2027.
- For a return required to be filed in 2027, section 6698 sets $260 per partner per month, for up to 12 months; the 2025 return due in 2026 carried $255.
What the partnership files and what the partners get
Form 1065 is an information return. The partnership does not pay tax on its income. It passes profits and losses through to its partners, and each partner's share goes to that partner on a Schedule K-1 to be reported on the partner's own return.
The Form 1065 instructions state that every domestic partnership must file, unless it neither receives income nor incurs any expenditures treated as deductions or credits for federal income tax purposes. A multi-member LLC that is taxed as a partnership is covered by the same rule.
Decision rule: if the entity has two or more owners for tax purposes, file Form 1065 unless the statements show no income and no deductible expense for the year. Pull the twelve monthly bank statements before accepting a client's word that the entity was dormant. One interest credit or one recurring bank fee means the return is required.
Calendar the 2026 due date
The Form 1065 instructions state that the return is due by the 15th day of the 3rd month following the end of the tax year, and that for calendar-year partnerships the due date is March 15. The 2026 return is due March 15, 2027. That date is a Monday, so the weekend rule does not move it.
The weekend rule is illustrated in the instructions with the 2025 return. March 15, 2026 fell on a Sunday, so calendar-year partnerships may timely file their 2025 returns by March 16, 2026. Check the weekday each year rather than assuming the 15th will hold.
The rule runs from the year-end, not from a fixed calendar. A partnership with a June 30 year-end counts three months forward, so its return is due on the 15th day of September. Set each client's due date from that client's own year-end and write it in the file.
Form 7004 gives six months to file, not to pay
Form 7004 is the request for the automatic extension. The IRS says the automatic extension period for time to file is generally 6 months, and that Form 7004 must be filed on or before the due date of the return. A Form 7004 filed after March 15, 2027 does not carry the extension for the 2026 return.
The extension covers filing only. The Form 7004 instructions state that Form 7004 does not extend the time to pay any tax due, and that payment of the balance is generally required by the return's due date.
Failure mode: a partner reads the extension as extending the partner's own return. It does not. The extension moves the partnership's filing date only, and each partner's personal return follows that partner's own deadline. Tell each partner in writing when the K-1 is expected, so a September surprise does not become a personal late filing.
Schedule K-1 timing and the section 6722 penalty
The Form 1065 instructions state that Schedule K-1 must be provided to each partner on or before the day on which the partnership return is required to be filed. That sentence does not say whether a Form 7004 extension moves that day, so do not plan around one. Put K-1 delivery on the calendar at the original March 15, 2027 deadline, and treat any later date as a decision the firm makes in writing.
The penalty for a late or incorrect statement is in section 6722. Rev. Proc. 2025-32 sets the general-rule amount at $340 per statement for statements required to be furnished in 2027, and $60 per statement if the statement is corrected on or before 30 days after the required furnishing date. Those amounts apply to filers with average annual gross receipts over $5,000,000 and to filers at $5,000,000 or less alike. Rev. Proc. 2024-40 set the same $340 general-rule amount for statements required to be furnished in 2026.
Worked example: a partnership with 12 partners sends every K-1 after the return's required filing date, and the penalty applies to each statement. The general-rule amount is $340 per statement, so twelve late statements carry $340 each before any other penalty. If every statement is corrected within 30 days, each one carries $60 instead. That is the reason to have K-1s final before the return is ready to file.
Late filing penalty: the partner count is the multiplier
Section 6698 sets the late filing penalty for Form 1065. The amount is a dollar figure for each month or part of a month that the failure to file continues, for a maximum of 12 months. It is multiplied by the total number of persons who were partners in the partnership during the year.
Which dollar figure applies depends on when the return is required to be filed. Rev. Proc. 2025-32 sets $260 for a return required to be filed in 2027, which is the 2026 return due March 15, 2027. Rev. Proc. 2024-40 set $255 for a return required to be filed in 2026, which is the 2025 return. Use $260 for the 2026 return, and do not carry the $255 figure forward from last year's workpapers.
Worked example: a partnership with six partners files three months late. The count is 3 months times 6 partners, or 18 partner-months, at $260 each. The same return filed one month late is 6 partner-months at $260 each.
Failure mode: the firm counts only the partners on the current operating agreement. The multiplier counts persons who were partners in the partnership, so a partner who left mid-year is still in the count. Build the count from the prior-year return and the capital account roll-forward, not from the year-end list alone.
Records to pull before the calendar starts
Collect the partnership's EIN and legal name, each partner's name and taxpayer ID, the ownership percentage at year end, and every transfer during the year with its date and percentage. Ask for the signed transfer document for each change.
Decision rule: if a partner changed during the year and the client cannot give a date, ask for the closing document from the transfer and flag the return for a second review. Do not estimate the date. The date decides which share belongs to which partner on the K-1.
Also pull the year-end bank statements and the prior-year Form 1065. The prior-year return carries the capital account balances and any carryovers that the 2026 return must tie to.
Wording to send the client and the partners
Send this to the client when the year-end numbers are not final: “Your partnership return for 2026 is due March 15, 2027. If the year-end numbers are not final by early March, we will file Form 7004 before that date. That gives the partnership six more months to file. It does not extend the time to pay any tax the partnership owes.” Keep the message in the file, and do not add a promise about the date the numbers will be final.
Send this to each partner when the K-1 may come after the original date: “Your Schedule K-1 from the partnership is expected by the date we confirm in writing. The partnership return may be extended. Your own return has its own deadline, and you may need a personal extension.” Do not give a K-1 date until the firm has confirmed it.
Keep both messages in the client file. If a partner later says they were not told, the file shows what was sent and when.