Form 5472, explained:
who files, when, and what it costs to get wrong.
Direct answer
Form 5472 is an IRS information return required from U.S. corporations that are 25%+ foreign-owned, and, since 2017, from foreign-owned single-member U.S. LLCs treated as disregarded entities. It reports transactions between the company and its foreign owner or related parties. Missing a required Form 5472 can trigger a $25,000 penalty, even if the company owes no U.S. tax.
The founders most likely to owe Form 5472 are the least likely to hear about it, until the IRS notice arrives.
What Form 5472 is
It's not a tax bill, it's a disclosure. The IRS uses it to see transactions between a U.S. entity and its foreign owners: capital contributions, loans, payments, reimbursements, use of property. For foreign-owned single-member LLCs, it's filed attached to a pro-forma Form 1120, a cover page of a corporate return that exists only to carry the 5472.
The trap
The founders most likely to owe it are the least likely to hear about it. A foreign-owned single-member LLC with zero U.S. income, zero U.S. presence, and zero U.S. tax due can still owe this filing. Merely funding your own LLC or paying its state fees from a personal account can be a reportable transaction.
Who must file
| Entity | Form 5472 required? |
|---|---|
| Foreign-owned single-member U.S. LLC (disregarded entity) | Typically yes, with a pro-forma 1120 |
| U.S. C-Corp, 25%+ foreign-owned, with reportable transactions | Typically yes |
| Multi-member LLC taxed as a partnership | No 5472, but partnership filings (1065, K-1s) apply |
| LLC that elected corporate taxation, 25%+ foreign-owned | Typically yes, under the corporate rules |
| U.S.-owned entities | No |
Rules have exceptions and edge cases. Prolify confirms what applies to your specific entity and coordinates the filing with licensed tax partners.
What counts as a reportable transaction
Broader than founders expect: it isn't limited to revenue or profit distributions.
Deadlines
Form 5472 for a foreign-owned disregarded LLC is due with the pro-forma 1120, generally April 15 for calendar-year entities, with an extension available to October 15 if requested in time. It cannot be e-filed as a standalone; it follows special IRS filing procedures, one reason DIY filings go wrong.
Penalties
The penalty for a missed, late, or substantially incomplete required Form 5472 is $25,000 per form, per year. If the failure continues after IRS notice, additional $25,000 penalties can accrue every 30 days. There is no cap, and "I didn't know" is not a defense the IRS accepts, though reasonable-cause relief exists in some circumstances and requires a licensed professional's judgment.
Missed a year (or three)?
Don't ignore it, and don't rush a DIY back-filing. Many situations are recoverable; some warrant a reasonable-cause statement prepared through a licensed CPA or attorney. Prolify runs this exact engagement routinely.
Confirm what was actually required
Not every foreign-owned entity owes Form 5472 every year. We establish the real scope before touching anything.
Assemble the transaction history
Pulled from bookkeeping records rather than memory, so the filing reflects what actually happened.
File back years correctly
Coordinated with licensed tax partners, with a reasonable-cause statement prepared where it applies.
How Prolify handles Form 5472
We ask the question on day one of every formation and every migration. The Operating Calendar carries the deadline. The transaction history comes out of your bookkeeping instead of your memory. The filing is coordinated with licensed tax partners, where applicable, and stored in your Document Vault with the receipt.
FAQ
Not sure if your entity is in scope?
Find out before the IRS tells you.
One conversation clears up what you owe, what's missing, and what to do next.
General information, not tax or legal advice. Filing is coordinated with licensed partners where applicable.