K-1 deadline 2027: when Schedule K-1s are due, the $340 late penalty and what investors can do

When K-1s are due for 2026

A Schedule K-1 is part of the entity’s return, and its deadline follows the return. For partnerships, Reg. §1.6031(b)-1T(b) requires the K-1 to be furnished by the day the partnership return is required to be filed, determined with regard to extensions. For S corporations, §6037(b) requires the K-1 by the day the return is filed. The Form 1065 and Form 1120-S due date is the 15th day of the third month after year end (§6072(b)).

A fiscal-year entity counts from its own year end: the 15th day of the third month for Forms 1065 and 1120-S, with a six-month extension. Weekend and holiday dates roll to the next business day. Publication 509 for 2027 had not been published when this guide was written, so the dates are computed from the rules.

The K-1 follows the return: why an extension removes the penalty

Because the K-1 deadline is defined by the return’s due date including extensions, a timely Form 7004 moves both. A partnership that files the extension by March 15, 2027 has until September 15, 2027 to file Form 1065 and to furnish every K-1, and no K-1 penalty runs in between. The extension is automatic, needs no signature and no reason, and for a pass-through entity usually involves no payment. The Form 7004 guide covers the lines and the extensions module files it.

The reverse is also true. An entity that misses March 15 without an extension is late on both the return and the K-1s from the next day, and the two penalties run together.

The penalties for late or wrong K-1s

The two stack. A 30-investor fund that files its 2026 return without an extension on May 3, 2027 owes 30 × $260 × 2 months = $15,600 for the late return and, if the K-1s go out the same day, 30 × $130 = $3,900 for the statements, because May 3 is after the 30-day window but before August 1. The late-filing penalty can be removed by first-time abatement; the K-1 statement penalty cannot, and needs a reasonable-cause statement under Reg. §301.6724-1. See the late-filing penalty guide and penalty relief.

Reasonable cause for a late K-1

Because the K-1 penalty sits in §6722, relief follows the information-return rules in Reg. §301.6724-1 rather than the first-time abatement policy. The waiver has two parts. First, either significant mitigating factors (the entity had never before been required to furnish K-1s, or it has an established history of compliance) or an event beyond its control, such as records lost to a supervening event, erroneous written IRS advice, the failure of an agent, or a partner who supplied wrong or missing information. Second, the entity must have acted in a responsible manner before and after the failure: reasonable care, significant steps to avoid or correct it, and correction within 30 days of discovery, which the regulation ordinarily treats as prompt.

The request is a written statement to the address on the notice that cites the waiver provision, states all the facts, is signed by the person required to file, and carries a penalties-of-perjury declaration. A proposed penalty arrives on Notice 972CG and must be answered within 45 days (60 for foreign filers); a denial comes on Letter 854C, followed by a CP15 or CP215 balance-due notice with appeal rights. Publication 1586 (Rev. 8-2026) walks through the process.

Tiered funds: when your K-1 depends on someone else’s

A fund that holds interests in other partnerships cannot finish its own K-1s until the lower-tier K-1s arrive, and those entities have the same September 15 extended date. A fund of funds that promises March delivery is promising something it does not control. The workable pattern is to extend the upper-tier return as a matter of course, tell investors in February that K-1s will come after the underlying partnerships report, and furnish estimated allocations so investors can make their April 15 payments. Investors in a tiered structure should plan on extending their own returns every year.

What investors can do while they wait

An investor cannot make a partnership issue a K-1 before the entity’s own deadline, and a fund that extends is within its rights to deliver in September. What the investor can do:

• Ask for an estimate. Most sponsors can give an approximate allocation in March even if the final K-1 comes later. Use it for the estimated payment.
• Extend your own return. An individual return is due April 15, 2027 and extends six months, to October 15, 2027, which comfortably covers a September 15 K-1. A corporate investor has the same April 15 to October 15 window.
• Pay by the original date. The investor’s extension, like Form 7004, does not extend payment. Pay the estimated tax on the expected allocation by April 15, 2027 to limit the failure-to-pay penalty (0.5% per month) and interest (7% for the fourth quarter of 2026).
• Check the 180-day clock if the K-1 carries a capital gain. A partner who wants to defer a K-1 gain into an opportunity zone fund can start the 180 days on the entity’s year end or on the return’s unextended due date, not only the sale date. The 180-day rule guide explains the choices.

How sponsors track delivery

The §6722 penalty is per statement, so the record that matters is proof that each K-1 was furnished, to whom, when and how. A spreadsheet of “sent” is thin evidence; a log with the investor, the delivery date, the method and, for electronic delivery, the consent on file is what a reasonable-cause statement needs.

Electronic delivery has its own conditions. The IRS rules for electronic recipient statements (Publication 1179 §4.6 and Publication 1099 Part M, written for 1099s) require the recipient’s affirmative electronic consent, given in a way that shows they can access the statement in that format, after a disclosure that explains that a paper copy is available without consent, the scope and duration of the consent, how to get a paper copy, how to withdraw, when statements stop, how to update information, the hardware and software needed, and how long the statement stays available. The statement must be posted by the due date, kept accessible through October 15, and the recipient notified. Applying the same approach to K-1s keeps the delivery defensible.

A practical sponsor checklist for a calendar-year fund:

1. Decide by February whether the return will be extended, and tell investors the K-1 date you are committing to.
2. File Form 7004 by March 15, 2027 if there is any doubt. It costs nothing and moves the K-1 deadline to September 15.
3. Furnish K-1s in one tracked batch, logging the date and method per investor, and collect electronic consents before the first electronic delivery.
4. If a K-1 needs correcting, send the corrected statement within 30 days of finding the error to stay in the $60 tier.

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Related 2027 dates for the same entities

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