Missing a Form 5472 deadline carries one of the steepest penalties in the tax code, but the deadline itself is easy to hit once you know exactly what applies to your entity. This guide covers every filing date by entity type, how to get a routine six-month extension if you need one, and what actually happens if a deadline slips past you.
Quick version: Form 5472 is due April 15 for most calendar-year filers, with an automatic extension to October 15 available via Form 7004. Foreign-owned disregarded entities must file that extension by mail or fax — e-filing isn’t permitted. Every one of our federal tax plans tracks this deadline and files the extension for you when needed.
When your Form 5472 is due, by entity type
Your Form 5472 deadline always matches the deadline of the return it’s attached to:
| Entity type | Original deadline | With Form 7004 extension |
|---|---|---|
| Foreign-owned single-member LLC (calendar year) | April 15 | October 15 |
| C-Corporation, 25%+ foreign-owned (calendar year) | April 15 | October 15 |
| Any entity above, fiscal year | 15th day of the 4th month after year-end | 6 months later |
| Foreign corporation with no US office or place of business | June 15 | December 15 |
A foreign-owned single-member LLC — a disregarded entity — files Form 5472 attached to a pro-forma Form 1120, which is why its deadline lines up with the standard corporate date. A foreign corporation with no US office gets extra time by default, since it’s further from the process. If any of these dates falls on a weekend or federal holiday, the deadline shifts to the next business day, and the postmark date is what counts for anything mailed.
The $25,000 penalty, and how it can grow
Form 5472 penalties are unusually severe compared to most IRS filing penalties, mainly because there’s no maximum cap on how large they can get.
The structure runs in two phases. Missing the deadline triggers an immediate $25,000 penalty, applied per form — if you have reportable transactions with more than one related party, each one carries its own $25,000 exposure. If the IRS then sends a notice and the filing still isn’t in, an additional $25,000 applies for every 30-day period that follows, with no ceiling on how long that can run. (The $25,000 figure itself dates to a 2018 law change — it was $10,000 before.)
This penalty applies even with $0 in income. Forming the LLC and funding it counts as a reportable transaction on its own, which is exactly why the deadline is worth tracking regardless of how active the business was that year.
Beyond the dollar figure, a late or missing Form 5472 also keeps the statute of limitations open indefinitely on the related tax return, can disallow foreign tax credits, tends to draw closer IRS attention in later years, and — for a willful failure to file — can carry criminal exposure. Our Federal Tax Filing service exists largely to keep you clear of all of this: we track your specific deadline, prepare the return, and file on time every year.
Getting a six-month extension with Form 7004
The extension is genuinely routine — no approval process, no explanation required, and no downside to requesting one early if your timeline is tight.
File Form 7004 by your original deadline, and the six-month extension is automatic. One rule trips people up more than any other: an extension to file is not an extension to pay. Form 7004 buys you more time to submit paperwork, but any tax owed is still due on the original date, with interest accruing on anything unpaid after that. For a foreign-owned disregarded entity with no US-source income, this usually isn’t an issue, since there’s typically nothing owed either way.
Foreign-owned disregarded entities are the one filer type the IRS explicitly bars from e-filing Form 7004 — mail or fax are the only accepted routes, even through tax software. Write “Foreign-owned U.S. DE” across the top, enter your Form 1120 entity code on Part I, line 1, and send it to Internal Revenue Service, 1973 Rulon White Blvd, M/S 6112, Attn: PIN Unit, Ogden, UT 84201 — or fax it to 855-887-7737 at 300 DPI or higher.
Filing the extension: your two options
| Method | Deadline | Notes |
|---|---|---|
| Fax | By April 15 | Fastest confirmation; keep the transmission receipt on file |
| Postmarked by April 15 | Use a trackable, certified service so you can prove timely filing |
Once Form 7004 is filed, you have until October 15 to complete Form 5472 and the pro-forma Form 1120. Use the extra months to pull together the year’s reportable transactions, confirm every related-party relationship, and gather supporting documentation like contracts and invoices — the IRS expects all of it kept on file for at least 7 years.
Deadline mistakes worth avoiding
A handful of mix-ups account for most of the late Form 5472 filings we see:
- Treating the filing extension as a payment extension. Form 7004 only moves the filing date — any tax owed is still due on the original deadline.
- Trying to e-file. Foreign-owned disregarded entities can’t submit Form 5472 or Form 7004 electronically, no matter what a piece of tax software claims to support. Mail or fax only.
- Using the standard Form 1120 mailing address. The dedicated Ogden, UT address above is the one that applies here — the general address will just slow things down.
- Assuming a dormant LLC is exempt. Formation costs and capital contributions count as reportable transactions on their own, so the filing is required even in a year with zero revenue.
- Underestimating international mail. The postmark date determines timeliness, but tracking mail from outside the US can be unpredictable — fax is faster, or mail two to three weeks ahead of the deadline if you’re relying on the postal service.
Real example: an LLC formed late in the year with a single $500 capital contribution and no other activity still owes a Form 5472 by the following April 15 — that contribution alone is a reportable transaction between the LLC and its owner.
If you’ve already missed the deadline
A missed deadline isn’t the end of the road. Depending on your situation, a few IRS relief programs can reduce or remove the penalty:
- Reasonable Cause relief — a case-by-case review where you show ordinary business care was taken despite the late filing, backed by a documented reason and a clean compliance history.
- First Time Abate — available if you’ve had no penalties for the prior three years and are current on your other returns and payments.
- Delinquent International Information Return Submission Procedures (DIIRSP) — for filing voluntarily, before the IRS contacts you, with a statement explaining the non-willful delay.
- Streamlined Filing Compliance Procedures — aimed at individual filers with a non-willful history of missed international information returns, typically covering the last three years of filings.
Success rates vary by program and by facts, and working with someone who’s navigated the process before meaningfully improves the odds. If you’re in this position, our Federal Tax Filing service prepares the documentation and represents you with the IRS toward the strongest available relief.
A quick filing checklist
- Confirm you need to file (25%+ foreign ownership, or any reportable transaction) — this catches most people who assume a quiet year means nothing to report.
- Decide whether you’re filing by the original deadline or requesting the extension.
- If extending, submit Form 7004 by the original deadline via mail or fax, with the “Foreign-owned U.S. DE” notation.
- Gather reportable-transaction records, related-party details, and ownership percentages ahead of time.
- Prepare Form 5472 and the pro-forma Form 1120, sign as “Owner” for a disregarded entity, and double-check you’re using the correct IRS address.
- Keep copies of everything filed, and retain supporting records for at least 7 years.
- Calendar next year’s deadline as soon as this year’s filing is done.
Why founders let us handle this one
Form 5472 sits at the intersection of a strict deadline and a severe penalty, which is exactly the combination worth handing to someone who does it every year. Our team confirms which forms your entity actually needs, tracks your specific deadline, files Form 7004 on your behalf before it’s due, and keeps your records organized for the full retention period — with a US-licensed CPA reviewing every return before it goes to the IRS.
Federal Tax Filing is $399 per filing for a single-member LLC’s Form 5472 and pro-forma Form 1120, or $899 per filing for a C-Corp or multi-member LLC filing Form 1120 or 1065 alongside it, unlimited K-1s and one state return included. If you’re newer to the form itself, Form 5472 explained covers what it reports and why it exists; our company formation and accounting plans handle the steps before and after it.
FAQ: Form 5472 deadlines and extensions
When is Form 5472 due for calendar-year filers?
April 15 for calendar-year filers, or October 15 with a Form 7004 extension.
Can I e-file Form 5472 or its extension?
No. Foreign-owned disregarded entities must mail or fax both Form 5472 and Form 7004 — this is the one filer type the IRS excludes from electronic filing entirely.
What happens if I file even one day late?
The $25,000 penalty applies as soon as the deadline passes, regardless of how late the filing ends up being. Additional $25,000 penalties can follow every 30 days after the IRS sends a notice, with no cap.
Do I need to file if my LLC had no income?
Yes, if there was any reportable transaction — and forming or funding the LLC usually counts as one. Zero revenue doesn’t mean zero filing obligation.
Does Form 7004 extend the deadline to pay, too?
No — only the filing deadline moves. Any tax owed is still due on the original date. For most foreign-owned disregarded entities with no US-source income, there’s typically nothing owed either way.
What’s the IRS address for a foreign-owned LLC’s Form 5472 extension?
Internal Revenue Service, 1973 Rulon White Blvd, M/S 6112, Attn: PIN Unit, Ogden, UT 84201, or by fax to 855-887-7737. Confirm the current address on the IRS’s own Form 5472 instructions before mailing, since it can change.
Once you know your deadline and have a plan for the extension if you need one, Form 5472 stops being something to worry about and becomes one more date on the calendar. Reach out if you’d rather we track it for you.
