Key takeaways
- Multi-member LLCs and partnerships file Form 1065 even when no tax is due.
- A single-member LLC is disregarded by default and files no Form 1065 for itself.
- The no-activity exception is narrow: any bank interest or deductible expense in the year means the return is required.
- For the 2026 return, the regular due date is March 15, 2027, and Form 7004 extends it six months to September 15, 2027.
- The 2025 Form 1065 instructions state a late filing penalty of $255 per partner per month, for up to 12 months; confirm the amount for the current year before quoting it.
Which entities file Form 1065
Form 1065, U.S. Return of Partnership Income, is an information return. The partnership does not pay federal income tax on its income. It reports the income, deductions and credits, 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 Form 1065, unless it neither receives income nor incurs any expenditures treated as deductions or credits for federal income tax purposes. A general partnership is a partnership under this rule, and so is a multi-member LLC.
The IRS classifies a domestic LLC with two or more members as a partnership by default. A single-member LLC is disregarded as separate from its owner by default, so it does not file its own Form 1065, and its activity is reported on the owner's return. An LLC can elect corporate treatment by filing Form 8832, and an LLC that has made that election files a corporate return instead.
Decision rule: count the owners for tax purposes, not the names on the state filing. Two or more owners means Form 1065 unless the no-activity exception applies. One owner means no Form 1065, but first check whether a Form 8832 election was filed. If the client is unsure, ask for a copy of the Form 8832 and the IRS acceptance letter before you open a partnership file.
When a partnership with no activity can skip the return
The exception is narrow. A partnership that neither receives income nor incurs any expenditures treated as deductions or credits is not required to file. Both halves have to be true for the whole year, and one bank charge is enough to break the test.
Bank interest on the operating account is income, and banks often pay it without the client noticing. Bank service charges, software subscriptions and any other ordinary business cost paid from the account are expenditures that can be treated as deductions.
Decision rule: pull the twelve monthly statements for the year and search for interest credits, service charges and recurring debits. If any appear, the entity files Form 1065. If none appear, ask the client to confirm in writing: “We had no income and no expenses in the year, and the only activity in the bank account was capital going in.” Keep that email in the file.
Failure mode: the client says the LLC was dormant, but the state annual report fee and the registered agent charge were paid from the operating account. A payment being made does not settle the federal question on its own. Whether it was an expenditure treated as a deduction or credit is a tax judgment, so have a reviewer decide it instead of accepting a yes or no from the client.
Deadline for the 2026 return
The Form 1065 instructions state that a domestic partnership generally must file by the 15th day of the 3rd month after its tax year ends. For a calendar-year partnership, the due date is March 15. The 2026 return, filed in 2027, is due March 15, 2027.
The date moves when March 15 falls on a weekend. The 2025 instructions give the example: March 15, 2026 was a Sunday, so calendar-year partnerships may timely file their 2025 returns by March 16, 2026. Check the calendar for each year rather than assuming March 15.
Decision rule: calendar the due date for each year and set an internal date of early March for the return to be ready for review. Early March leaves time to file Form 7004 if the books are not final, and to send each partner a Schedule K-1.
Extending with Form 7004
Form 7004, Application for Automatic Extension of Time To File Certain Business Income Tax, Information, and Other Returns, is the request for the extension. The Form 1065 instructions say to file Form 7004 by the regular due date of the partnership return, and the IRS description of the form is that it requests an automatic 6-month extension.
For the 2026 Form 1065, due March 15, 2027, the six-month extension runs to September 15, 2027. Put September 15, 2027 in the client file as the extended date, and keep March 15, 2027 as the date the return is due without an extension.
Decision rule: if the books or the partner list are not final by early March, file Form 7004 before March 15, 2027. The instructions tie the extension to the regular due date, so a request sent after that date does not carry the same extension.
Failure mode: an extension moves the filing date for the partnership. It does not move the partners' own deadlines. A partner who receives a Schedule K-1 in September still has to file a personal return on the partner's own schedule, which may mean a personal extension. Tell the partners this in writing before the extension is filed.
Late filing penalty, per partner per month
The Form 1065 instructions state that the penalty is $255 for each month or part of a month, for a maximum of 12 months, that the failure to file continues. The amount is multiplied by the total number of persons who were partners during any part of the tax year. This multiplier is the detail most client conversations miss.
The $255 figure appears in the 2025 Form 1065 instructions. The penalty amount is adjusted for inflation, so the figure that applies to a return filed in 2027 may differ. Check the Form 1065 instructions for the year you are filing before quoting a number to a client, and do not reuse the 2025 figure for the 2026 return without checking.
Worked example: a partnership with four partners files two months late. The penalty is the months times the partners, which is 2 times 4, or 8 partner-months. At the $255 figure, that is 8 times $255, or $2,040. A partner who joined in November still counts as a partner for the year, so the count includes that partner.
Failure mode: the firm counts only the partners on the current operating agreement. The count comes from every partner who held an interest during the year, including a partner who left in June. Build the partner list from the prior-year return and the capital account roll-forward, then compare it to the year-end ownership.
Records to pull before you file
Collect the partnership's EIN, the list of partners with each partner's name, tax ID and ownership share at year end, and every change in ownership during the year. Add the year-end bank statements and the prior-year Form 1065, which carries the capital account balances and any carryovers into this year.
Decision rule: if a partner changed during the year, ask for the date of the change and the percentage that moved. If the client cannot give a date, ask for the closing document from the transfer and flag the return for a second review before filing.
Failure mode: an LLC that elected corporate treatment on Form 8832 files a corporate return, not Form 1065. Sending a Form 1065 request to that client gives the wrong forms and the wrong deadline. Confirm the election before opening the partnership file.