How to Fill Out Form 7004 (2026): Business Tax Extension

Form 7004 gives partnerships, S corporations, and C corporations an automatic six-month extension to file their business tax return. It must be filed by the return's original due date.

What's new for 2026:

Partnerships and S corporations must file Form 7004 by March 15, 2027, which extends the deadline to September 15, 2027.
C corporations must file by April 15, 2027, which extends the deadline to October 15, 2027.
The late filing penalty for partnerships and S corporations rises to $260 per owner, per month, for returns due in 2027.
The IRS has posted a draft revision of Form 7004. Check that you are using the current version before filing.
The form codes are unchanged: 09 for Form 1065, 25 for Form 1120-S, and 12 for Form 1120. Several popular guides list them incorrectly.

Remember that Form 7004 extends the time to file, not the time to pay.

Form 7004 at a glance

Key fact	2026 tax year
Who files	Partnerships, LLCs, S corporations, C corporations, and trusts that need more time
Form 1065 and 1120-S	File by March 15, 2027. Extended to September 15, 2027
Form 1120 (calendar year)	File by April 15, 2027. Extended to October 15, 2027
Approval	Automatic. No reason or signature required
Payment	Any tax owed is still due by the original due date
One form per return	File a separate Form 7004 for each return you extend
Not for	Personal returns (Form 4868), nonprofit returns (Form 8868), or 1099s and W-2s (Form 8809)

Download Form 7004

Which form code do you need?

If you file	Line 1 code
Form 1065 (partnership or multi-member LLC)	09
Form 1120-S (S corporation, or LLC taxed as one)	25
Form 1120 (C corporation, or LLC taxed as one)	12
Form 1041 (trust)	05
Form 1041 (estate)	04

Line-by-line instructions

Line	What to enter	Where it comes from in your records
Name, address, identifying number	Entity's legal name, address, and EIN	EIN confirmation letter. Must match the return you are extending
1: Form code	The two-digit code for the return being extended	The table above, checked against the form
2: Foreign corporations	Check only if a foreign corporation has no office or place of business in the US	Entity records. Most service firms skip this
3: Consolidated groups	Check if the filer is the parent of a group filing a consolidated return, and attach the member list	Group structure. Rare for service firms
4: Special extensions	Check only if the entity qualifies for an extension because its books are kept outside the US	Rare for service firms
5a / 5b: Tax year	Calendar year 2026, or fiscal year dates. Use 5b only for a short tax year	Your tax year
6: Tentative total tax	Your best estimate of the tax the return will show	A projection from your latest year-end close. Usually $0 for partnerships and S corporations
7: Payments and credits	Estimated tax already paid and credits available	EFTPS history and last year's overpayment applied
8: Balance due	Line 6 minus line 7. Pay this by the original due date	Calculated

Worked example: two service firms extending their 2026 returns

Item	S-corp agency	C-corp consultancy
Return extended	Form 1120-S	Form 1120
Line 1 code	25	12
File Form 7004 by	March 15, 2027	April 15, 2027
Line 6: Tentative tax	$0 (income passes through to owners)	$42,000
Line 7: Payments already made	$0	$36,000 in quarterly estimates
Line 8: Balance due	$0	$6,000, due April 15, 2027
New filing deadline	September 15, 2027	October 15, 2027

The S-corp owners are not done yet. Their K-1s will not arrive until the extended return is filed, so each owner files Form 4868 to extend their own return and still pays estimated personal tax by April 15, 2027. For pass-through firms, the extension shifts paperwork, not cash.

Your Form 7004 prep checklist

When	Task
Late February	Decide whether the return will be ready on time. If the year-end close is not finished, plan to extend
Before the deadline	Project the tax due from the latest books so line 6 is a real estimate
March 15 or April 15	File Form 7004 (e-file gives you an acknowledgment) and pay any balance through EFTPS
Same day	Check whether your state accepts the federal extension or needs its own
By April 15	Remind owners and partners to extend their personal returns and pay estimates
Before the extended date	Finish the return and send K-1s. There is no second extension

Common mistakes to avoid

Treating the extension as more time to pay. Tax not paid by the original due date accrues interest and late payment penalties, even with a valid extension.
Using the wrong form code. Code 09 is Form 1065, 25 is Form 1120-S, and 12 is Form 1120. An extension filed under the wrong code covers the wrong return.
Filing after the original deadline. Form 7004 only works if filed by the original due date. If you file late, the return is already late, and partnerships and S corporations owe $260 per owner per month.
One Form 7004 for several returns. Each return needs its own extension, including each entity in a group of related businesses.
Forgetting the state. Many states accept the federal extension, but some require their own form or an extension payment.

If you file late or get it wrong

If Form 7004 is filed after the original due date, it has no effect and the return is late from the original date. Partnerships and S corporations then owe $260 per owner for each month or part of a month, up to 12 months. C corporations owe a percentage of unpaid tax for each month late. Underpaying on line 8 leads to late payment penalties and interest on the shortfall from the original due date.

Professional partnership callout

When a law, accounting, or medical partnership extends its return, every partner is affected. Partners cannot file accurate personal returns without their K-1s, so most extend too, but they still owe estimated tax by April 15. Firms with partners in several states may also need to extend state composite returns, which can follow different rules. Sharing a profit projection with partners in March avoids underpayment surprises. Confirm the extension requirements for your firm and its states with your CPA before relying on these notes.

Frequently asked questions

Does Form 7004 need IRS approval?

No. The extension is automatic if the form is complete and filed by the original due date. You do not need to give a reason or sign it. The IRS only contacts you if the extension is rejected, and e-filing gives you an acknowledgment as proof.

Can I extend my business return and my personal return with one form?

No. Form 7004 covers business returns only. Owners and partners extend their personal returns separately with Form 4868, and each business return needs its own Form 7004.

What if I miss the extended deadline?

There is no second extension. The return is treated as late from the extended due date, and penalties apply until it is filed. For partnerships and S corporations, that is $260 per owner per month, up to 12 months.

Related reading:

AI-powered. Experts in the Loop. Most business extensions happen because the books are not closed in time. Numetix closes your books every month, so your CPA has year-end numbers in January and an extension becomes a choice, not a necessity. Explore Numetix bookkeeping.

Always consult your CPA for advice specific to your business and its filing deadlines.

This article is for informational purposes only and does not constitute formal legal or tax advice. Always consult a qualified tax professional regarding your specific situation.