Almost every non-US founder we onboard at Mizu eventually asks the same question once they hear about something called Form 5472: “Is this actually required if my LLC didn’t earn anything?”
The short answer is yes, more often than people think. The longer answer is what trips most founders into a $25,000 penalty per year — usually without realizing it.
What Form 5472 actually is
Form 5472 is an information return, not a tax return. The IRS uses it to track money flowing between US business entities and their foreign owners. It existed since 1989 for foreign-owned C-corps, but in late 2016 the Treasury extended it to foreign-owned US single-member LLCs, effective for tax years starting in 2017 — which is the entity type most non-US founders end up with.
That extension is the part nobody tells you. If you opened a Wyoming or Delaware LLC as a non-US person and you’re the only owner, the IRS treats your LLC as a “disregarded entity” for income tax purposes — meaning the LLC itself doesn’t file its own income tax return. That’s true. But disregarding income tax does not mean disregarding information reporting. The 5472 obligation kicks in regardless.
The mechanical filing involves two pieces:
- Form 5472 itself — reports transactions between the LLC and its foreign owner.
- A “pro-forma” Form 1120 — basically the cover page of a corporate income tax return, filled out as a placeholder. You don’t actually report any income on it. You’re using the 1120 as a wrapper to attach the 5472 to.
For most calendar-year LLCs, that two-form filing gets mailed (or faxed) to the IRS by April 15, or October 15 if you’ve extended.
Who actually has to file
The IRS rule applies if all three of these are true:
- The LLC is owned by a non-US person (individual or foreign entity)
- The LLC has a single owner (so it’s a disregarded entity for federal tax)
- The LLC had at least one reportable transaction during the year
The third condition is where most founders go wrong, because they misunderstand what “reportable transaction” means.
What counts as a reportable transaction
This is the part that surprises people. Reportable transactions are essentially any money movement between you (the foreign owner) and the LLC. The most common ones:
- Capital you wired in to fund the LLC — counts. Even if it’s $1,000 to seed the bank account.
- Distributions the LLC sent back to you — counts.
- Loans between you and the LLC, in either direction — counts.
- Payments for services you provided to the LLC, or vice versa — counts.
- Inventory or asset sales between you and the LLC — counts.
What doesn’t count: revenue the LLC earned from third parties. If your LLC has US customers paying through Stripe, those payments are not reportable on 5472.
The most common misconception
Almost every founder we work with has a reportable transaction the moment they fund the LLC’s bank account. That single wire is enough to trigger the filing requirement, even if the LLC then sits idle for the rest of the year with $0 in revenue. Founders assume “no income = no filing.” For Form 5472, that’s not how it works.
What the penalty actually looks like
The number that gets attention is $25,000 per failure. That’s the base penalty for not filing Form 5472 when you should have. Two things to understand about how it scales:
| $25K | +$25K | # 2017 |
|---|---|---|
| Per LLC, per year of missed filing |
Every 30 days after IRS notice |
Year penalty raised from $10K (TCJA) |
The penalty doesn’t depend on how much income the LLC had, how much US tax was owed, or whether the missed filing actually cost the IRS anything. It’s a flat per-occurrence penalty for the missed information return.
We have not personally seen the IRS hit a small founder LLC with the full $25,000 — the IRS tends to issue notices first, and reasonable cause arguments can sometimes reduce penalties — but I would not bet a year of company runway on that pattern holding.
How the filing actually works
This is where operational annoyance shows up. Three things make 5472 painful relative to most other US tax filings:
You can’t e-file it
For a single-member LLC’s pro-forma 1120 + 5472, the IRS still requires paper filing — either by mail or by fax. Most modern tax software won’t handle it for disregarded entities. Mainstream DIY tax platforms like TurboTax don’t support this filing path.
You need an EIN to file
The 5472 requires the LLC’s EIN. If you formed the LLC but never got an EIN, you can’t file. Getting an EIN as a non-US person without an SSN is a separate process — IRS form SS-4 by fax, typically a multi-week wait depending on IRS backlog, faster with a third-party designee.
It’s the LLC’s filing, not yours personally
The form is filed in the LLC’s name, signed by an authorized person of the LLC. This should be handled as part of your company’s annual obligations, not your personal tax return.
What does this mean in practice
If you’re a non-US founder who already has a single-member LLC: assume you have a 5472 obligation unless you’ve specifically confirmed otherwise. The default state is “you need to file.” The exception (no reportable transactions all year, including capital contributions) is rare for active founders.
If you’re considering forming an LLC: this is not a reason to avoid the structure. A foreign-owned single-member LLC is still the most practical default for most non-US solo founders. The 5472 obligation is just part of the recurring cost — somewhere in the $200–$500/year range with a service, more with a US CPA cold.
If you formed an LLC and have never filed a 5472: get advice from someone qualified, soon. Late filings can sometimes be cured under reasonable cause, but the longer you wait, the harder that argument gets.
FAQ
Do I need to file Form 5472 if my LLC had no revenue?
Yes, in almost all cases. The trigger is reportable transactions — including the capital you wired in to fund the LLC — not revenue.
What’s the difference between Form 5472 and an income tax return?
Form 5472 is an information return. It reports transactions between you and your LLC; it does not calculate or report income tax owed. Whether you also owe US income tax is a separate question that depends on whether your LLC has effectively connected income (ECI).
Can I file Form 5472 myself?
Technically yes. Practically, the requirement to paper-file the pro-forma 1120 + 5472 (no e-file for single-member LLCs) and to format the 5472 correctly makes this one of the harder DIY filings. Most non-US founders we talk to who tried it solo gave up after one cycle.
What happens if I missed filing for previous years?
File the late returns as soon as possible, ideally with a reasonable cause statement explaining why. The IRS may waive or reduce penalties for good-faith first-time filers, but this is fact-dependent. Talk to a CPA or qualified compliance provider before submitting.
