A partnership, or a multi-member LLC taxed as one, extends Form 1065 by filing Form 7004 with form code 09 by March 15. The extension is six months, to September 15. There is no tax to estimate for most partnerships, so the form takes minutes.
The penalty most partners do not know about
A partnership pays no federal income tax, so a late Form 1065 feels harmless. It is not. Under section 6698 the penalty is a fixed amount per partner per month, for up to twelve months, regardless of whether any tax was due. For returns due in 2026 the base rate was $255. Ten partners, six months late, is $15,300.
Small partnership relief
Rev. Proc. 84-35 presumes reasonable cause for a domestic partnership with ten or fewer partners, all of whom are individuals (or estates of individuals), none of whom is a nonresident alien, where each partner filed their own return on time and reported their share. If that describes you, the penalty is waivable on request. The reasonable cause statement is the place to say so.
Partners still need their own extension
Form 7004 extends the partnership return. Each partner's Form 1040 is still due April 15. If the K-1s will be late, each partner files Form 4868.
Common mistake
Assuming a two-member LLC owned by spouses is a disregarded entity. In most states it is a partnership and must file Form 1065 (community property states have an exception). A missed 1065 is a per-partner penalty.
Ready to file it?
You can file a business extension (Form 7004) online in a few minutes with TaxExtension.com, an IRS-authorized e-file provider operated by our publisher. The extension is automatic; the payment is still due on the original date.
Sources
- IRS, About Form 7004
- IRS, Failure to file penalty, partnership base rates and small partnership relief
- IRS, Instructions for Form 1065