Form 7004 Foreign-Owned LLC: How to Extend Without Killing Your Filing

Key Takeaways

• Form 7004 extends most U.S. business return deadlines by six months — but only if filed by original due date.
• For Form 5472 + pro forma 1120 (DEs), Form 7004 must be sent to the same dedicated Ogden, UT address — NOT regular Form 7004 address.
• “Foreign-owned U.S. DE” must be written across the top.
• Form 7004 only extends time to file — not time to pay.
• A misrouted Form 7004 doesn’t extend anything — original deadline treated as missed.
• Different forms get different codes (Form 1120 = 12; Form 1065 = 09; Form 1120-F = 15).

Where This Post Fits

→ What Is Form 5472? (/knowledge/what-is-form-5472)
→ How to File Taxes for a Foreign-Owned Single-Member LLC (2026) (/knowledge/foreign-owned-smllc-tax-filing)
→ Foreign-Owned LLC Compliance Calendar 2026 (/knowledge/foreign-owned-llc-compliance-calendar)

For many international founders, filing a Form 7004 extension seems simple until the IRS rejects it because it was routed incorrectly. Unlike standard domestic business extensions, foreign-owned LLC filings often involve special mailing rules tied to Form 5472 and pro forma Form 1120 requirements.

Form 7004 looks like a one-page formality. For most U.S. businesses, it is. For foreign-owned LLCs, it is one of the most consistently misrouted forms in the system — and the consequences of sending it wrong are exactly the same as not sending it at all.

What Form 7004 Does

Form 7004 extends the time to file most business returns by six months.

For foreign-owned LLCs, the extension applies only when the form is submitted correctly, to the correct IRS unit, and before the original due date.

Form 7004 extends filing only — not time to pay. Estimated tax should be paid by original due date.

Which Returns Form 7004 Extends (Foreign-Owned LLC Context)

The Routing Rule That Catches People

For foreign-owned U.S. disregarded entities, Form 7004 does NOT go to the regular Form 7004 mailing address. It must be sent to the same dedicated Ogden, UT address with “Foreign-owned U.S. DE” written across the top.

This is one of the most important compliance rules tied to the extension and one of the most common reasons extensions fail.

The Right Way to Route Form 7004 for Foreign-Owned DEs

• Mail to: Internal Revenue Service, 1973 Rulon White Blvd, M/S 6112, Attn: PIN Unit, Ogden, UT 84201.
• Or fax (300+ DPI) to 855-887-7737.
• Write “Foreign-owned U.S. DE” across the top of Form 7004.
• Use Form code 12 (Form 1120).
• Sign and date.
• File by April 15, 2026.

Common Form 7004 Mistakes

• Mailing 7004 for pro forma 1120 to regular 7004 address — extension fails.
• Forgetting “Foreign-owned U.S. DE” label.
• Wrong Form 7004 code.
• Filing after original due date — extensions are not retroactive.
• Assuming 7004 extends time to pay — it doesn’t.
• One Form 7004 for multiple unrelated returns — each entity needs its own.
• Missing special Form 8804 extension rules.

Foreign founders frequently assume the IRS processes all business extensions the same way. In practice, extensions for foreign-owned U.S. disregarded entities are treated differently because they are tied to international reporting compliance under Form 5472 rules.

Worked Example: A Misrouted Form 7004

Facts: A non-U.S. founder owns 100% of a Delaware single-member LLC. The LLC files pro forma Form 1120 + Form 5472 every year. In March 2026, the founder downloads Form 7004 from IRS.gov, enters code 12, signs it, and mails it to the regular Form 7004 address listed on the IRS Form 7004 instructions — Kansas City, MO. April 15 passes. October 15 arrives, and the pro forma 1120 + Form 5472 is mailed to Ogden.

What goes wrong

• The Kansas City service center does not process foreign-owned DE extensions. The extension is effectively never received by the Ogden unit handling Form 5472.
• The IRS treats the original April 15 deadline as missed. The October 15 filing is now five months late on a return that was never extended.
• Form 5472 penalty exposure under IRC § 6038A: $25,000 base penalty for failure to timely file Form 5472, plus $25,000 per 30-day continuation period after IRS notice (no statutory cap).
• The “I filed an extension” defense fails because the extension was never properly filed at the unit that controls the return.

What should have happened

• Mail Form 7004 to Internal Revenue Service, 1973 Rulon White Blvd, M/S 6112, Attn: PIN Unit, Ogden, UT 84201 — or fax to 855-887-7737 at 300+ DPI.
• Write “Foreign-owned U.S. DE” across the top of Form 7004.
• Send certified mail with return receipt, or keep the fax confirmation page with the timestamp.
• Keep the proof of timely filing in the entity’s permanent compliance file.

Form 8804 Extensions: The Other Routing Surprise

Form 7004 extends Form 8804 (Annual Return for Partnership Withholding Tax under § 1446) using code 08. Unlike most partnership returns, Form 8804’s original due date depends on whether any foreign partner is filing Form 1040-NR or 1120-F: March 15 if all partners are U.S. persons; April 15 (with possible June 15 in narrow cases) otherwise. The extension is six months from the applicable original due date.

Critical: the Form 7004 for Form 8804 does NOT extend the underlying Form 1065 — those are two separate extensions on two separate codes (08 and 09). A common mistake is filing one Form 7004 with code 09 for the partnership and assuming it covers the withholding return. It does not.

What to Do If You Already Misrouted Last Year

If you discover that a prior-year Form 7004 was sent to the wrong address — and the underlying return was then filed late — you have three concrete steps:

• Pull the certified-mail or fax records to establish what was sent, when, and where.
• File the underlying return (pro forma 1120 + Form 5472, or Form 1065, etc.) immediately to stop the 30-day continuation clock under § 6038A.
• Prepare a reasonable-cause statement attached to the return citing the routing error, the timestamped attempt to comply, and the corrective action taken. See our companion article on
• Form 5472 penalty relief for the detailed reasonable-cause framework.

When Professional Preparation Is Strongly Recommended

• Foreign-owned U.S. DEs — routing rules differ from regular extensions.
• First-time filers.
• Multi-entity structures requiring multiple coordinated extensions.
• Form 8804 extensions (§ 1446 specifics).
• Late or missed prior-year extensions with built-up penalty exposure.

Frequently Asked Questions

Does Form 7004 extend Form 5472 for a foreign-owned LLC?

Yes — when filed timely and routed correctly. Extension is on underlying Form 1120; extends April 15 to October 15.

Where do I mail 7004 for foreign-owned LLC?

For pro forma 1120 + Form 5472: IRS Ogden, UT 84201, M/S 6112. NOT regular Form 7004 address.

Does 7004 extend time to pay?

No. Only time to file. Tax owed still due original date.

Is 7004 automatic?

Yes — automatic if filed by original due date and properly completed.

Can I e-file 7004 for foreign-owned DE?

No. Foreign-owned DE returns and extensions cannot be e-filed.

Penalty if 7004 misrouted?

IRS treats it as not filed — original deadline applies, including potential $25,000 Form 5472 penalty exposure if return is late.

The Bottom Line

A Form 7004 extension is straightforward only when the routing, labeling, and filing requirements are handled correctly for the specific entity type. For foreign-owned disregarded entities, one mailing mistake can completely invalidate the extension and expose the business to major IRS penalties.

Form 7004 is the simplest form most foreign-owned LLCs file all year. It is also the one most often filed wrong.

Need Help Filing Your Form 7004 Correctly?

Optimize Tax LLC handles Form 7004 extensions for foreign-owned LLCs every season — routed correctly to the Ogden M/S 6112 unit, with the right code, the “Foreign-owned U.S. DE” label, the correct fax confirmation, and coordinated extensions across pro forma 1120 + Form 5472, Form 1065 + Schedules K-2/K-3, Form 1120-F, and Form 8804/8805 under § 1446.

If you have one or more foreign-owned LLCs and you want a credentialed CPA and EA to file your extensions correctly before April 15, schedule a consultation at Optimize Tax.

Continue Reading: The Form 5472 Knowledge Series

• What Is Form 5472? A Plain-English Guide for Foreign-Owned LLCs (pillar) (/knowledge/what-is-form-5472)
• Do You Need an EIN for a Foreign-Owned LLC? (/knowledge/ein-foreign-owned-llc)
• Form 8832 Entity Classification Election (/knowledge/form-8832-entity-classification)
• Do I Need to File Form 5472 If My LLC Had No Activity? (/knowledge/form-5472-no-activity)
• How to File Taxes for a Foreign-Owned Single-Member LLC (2026) (/knowledge/foreign-owned-smllc-tax-filing)
• What Is a Form 1120 Pro Forma? (/knowledge/form-1120-pro-forma)
• Do Partnerships Need to File Form 5472? (/knowledge/do-partnerships-file-form-5472)
• Foreign-Owned Multi-Member LLCs: Form 1065 + 8805 (/knowledge/foreign-owned-multi-member-llc-form-1065-8805)
• Schedules K-2 and K-3: International Reporting for Partnerships (/knowledge/schedules-k2-k3-partnerships)
• Money Transfers Between Foreign-Owned LLCs (/knowledge/money-transfers-foreign-owned-llcs)
• Form 1040-NR vs Form 1120-F (/knowledge/form-1040-nr-vs-1120-f)
• Form 8865 vs Form 5472 (/knowledge/form-8865-vs-form-5472)
• Form 5472 Penalty Relief: When Reasonable Cause Works (/knowledge/form-5472-penalty-relief)
• Foreign-Owned LLC Compliance Calendar 2026 (/knowledge/foreign-owned-llc-compliance-calendar)

About the Author

Krishnaveni Raghavan, CPA, EA, is a Certified Public Accountant and IRS-credentialed Enrolled Agent with deep experience in U.S. tax compliance for foreign-owned LLCs, multi-entity structures, expats, and cross-border businesses. She leads the international tax practice at Optimize Tax LLC, where she advises on entity classification (Form 8832), Form 7004 extensions for pro forma 1120 + Form 5472 filings, partnership withholding (Forms 8804/8805/8813), Forms 1040-NR and 1120-F, and IRS penalty resolution. As both a CPA and EA, she is licensed to represent taxpayers before the IRS in all 50 states.

Sources & References

• IRS Instructions for Form 7004 — Application for Automatic Extension of Time to File Certain Business Income Tax, Information, and Other Returns.
• IRS Instructions for Form 5472 — Information Return of a 25% Foreign-Owned U.S. Corporation or a Foreign Corporation Engaged in a U.S. Trade or Business.•
• IRS Instructions for Forms 1120, 1120-F, 1065, and 8804.
• Internal Revenue Code § 6038A — Information with respect to certain foreign-owned corporations.
• Internal Revenue Code § 6072 — Time for filing income tax returns.
• Internal Revenue Code § 1446 — Withholding of tax on foreign partners’ share of effectively connected income (Form 8804 context).
• Treasury Regulations § 1.6038A-1 — General requirements and definitions.
• Treasury Regulations § 1.6081-3 — Automatic extension of time for filing certain returns.