Form 5472: the $25,000 filing every foreign-owned Delaware LLC must make

Most foreign founders incorporate a Delaware LLC, hear it’s "the simplest US entity," and proceed as if there’s nothing to file when the business doesn’t make money. That mental model — perfectly correct for most LATAM and European jurisdictions — is the most expensive misconception in cross-border startup life. The IRS doesn’t care that your LLC has zero revenue. If a foreign person owns 25% or more of it, you owe a Form 5472 every year, and the penalty for missing it is $25,000.

This is the post that lays out exactly what Form 5472 is, who has to file it, what the IRS considers a "reportable transaction" (the bar is lower than founders think), and the five steps to file it before the April deadline. If you’re running a Delaware LLC from outside the US, this is the single most expensive form to miss.

Who has to file (and the misconception that gets founders fined)

Three kinds of entities are on the hook for Form 5472, all governed by Section 6038A of the Internal Revenue Code:

• A US corporation (including C-Corp) with at least one direct or indirect 25% foreign shareholder.
• A foreign corporation engaged in a US trade or business — even without a physical presence.
• A foreign-owned single-member US LLC, treated as a "disregarded entity" for federal income tax but explicitly treated as a corporation for the purposes of §6038A reporting since the 2017 Treasury regulations.

The third category is the one that catches founders. Pre-2017, foreign-owned single-member LLCs were genuinely off the IRS radar — no separate filing, no separate return. The Tax Cuts and Jobs Act changed that. Starting with the 2017 tax year, a foreign-owned disregarded LLC must obtain an EIN, file a pro-forma Form 1120, and attach Form 5472. Most foreign-founder guides on the internet predate this rule, which is why so many founders still believe the older "single-member LLCs file nothing" advice and miss the form for years.

The deadline — and the only extension you can ask for

Form 5472 is filed with the pro-forma Form 1120 by the 15th day of the 4th month after the end of the tax year. For most LLCs running on a calendar year, that’s April 15. The form gets one extension: file Form 7004 by April 15 and you get six additional months, pushing the deadline to October 15.

Three operational details that surprise founders. First, Form 5472 cannot currently be e-filed by foreign-owned disregarded LLCs the same way other 1120 returns can; the package has to be mailed or faxed to the IRS in Ogden, Utah, with a "Foreign-Owned U.S. DE" label across the top of Form 1120. Second, mail processing takes 4 to 6 months from receipt — meaning if you mail on April 14, the IRS may not stamp it received until September, and any error gets surfaced months later. Third, there is no separate state extension for Delaware franchise tax (June 1) just because you filed Form 7004; those are two unrelated filings on two unrelated calendars.

Reportable transactions: where founders get it wrong

The most common reason a foreign founder skips Form 5472 is the belief that "we had no business activity, so there’s nothing to report." That belief is wrong almost every time. The IRS definition of a "reportable transaction" with a related party is far broader than what most founders intuit. It includes:

• Capital contributions you make to your own LLC — even your first $1,000 to open the bank account.
• Loans from you (the foreign owner) to the LLC, regardless of amount.
• Loans from the LLC back to you.
• Distributions, even when the LLC is dormant and you’re just zeroing out a balance.
• Payments to or from related foreign entities — including your operating company in Mexico, Colombia, Brazil, or wherever the work happens.
• Payments for the use of property, royalties, interest, and most cross-border money movement between the LLC and anyone classified as a "related party" under §267(b) or §707(b).

In practice, the only common scenario in which a foreign-owned Delaware LLC has zero reportable transactions in a year is a true zombie entity — no bank account, no contributions, no movement whatsoever. Even then, the entity still files Form 5472 with the appropriate boxes marked. There is no "no-activity exemption." The penalty applies for failing to file, not failing to have transactions.

The $25,000 math — and what "per failure" really means

The base penalty for not filing Form 5472, or filing it substantially incomplete, is $25,000 per failure. The "per failure" phrasing is what catches founders: the penalty applies per reporting corporation, per tax year. A founder who incorporates in 2024 and discovers Form 5472 in 2026 is sitting on two failures — 2024 and 2025 — for $50,000 in exposure. Discover it a year later, and it’s $75,000 across three years.

The penalty also stacks beyond the base amount in two ways that most foreign-founder posts miss. First, after the IRS sends a notice and the failure continues for more than 90 days, there is an additional $25,000 for each 30-day period (or fraction) that the failure persists, with no statutory cap. Second, failure to keep adequate books and records to substantiate the reportable transactions can be treated as a separate violation — another $25,000 — even if the form itself was eventually filed.

There is a reasonable-cause exception, but it requires showing the IRS that the failure was not willful and that the taxpayer exercised "ordinary business care and prudence." For a sophisticated founder who incorporated in Delaware specifically to access US infrastructure, "I didn’t know" is rarely a successful argument.

Three landmines first-year foreign founders walk into

The three patterns Cherry sees most often in the foreign-founder cohort — each of them avoidable if caught in the first 60 days of incorporation:

1. 1. No EIN, no Form 5472. The LLC has to have an Employer Identification Number to file the pro-forma 1120 + 5472 package. Foreign founders without a US Social Security number must apply via Form SS-4 by fax or mail; processing currently takes 6 to 8 weeks. Founders who incorporate in March and try to file by April 15 don’t get an EIN in time, and end up filing late by default.
2. 2. Treating the foreign operating company as unrelated. If you run a startup in Mexico City whose product is sold through the Delaware LLC, the Mexican entity is a "related party" — any cross-border payment between them is reportable. Founders frequently exclude these transactions because they think of the two entities as the same business; the IRS does not.
3. 3. Banking the LLC before the EIN arrives. The provisional account opened with the founder’s passport and a placeholder name often has the founder’s personal funds commingled with what should have been the LLC’s capital. Years later, the 5472 reportable-transaction trail is impossible to reconstruct cleanly.

The five-step filing process

1. Get the EIN first. Without it, nothing else works. Apply via SS-4 (fax to +1 855 641 6935 if you’re outside the US). Allow 6 to 8 weeks. Don’t wait until March.
2. Prepare a pro-forma Form 1120. Only the LLC name, address, EIN, and tax year fields are required — the income lines stay blank for a disregarded entity. Write "Foreign-Owned U.S. DE" at the top.
3. Fill in Form 5472. Identify the foreign owner (Part II), the reporting corporation (Part I), and every reportable transaction with related parties (Parts IV–VI). One Form 5472 per related party — if you have a Mexican parent and a personal owner, that’s two separate forms in the same package.
4. Attach 5472 to the pro-forma 1120. Mail or fax the package to the IRS Ogden, Utah address listed in the current Form 1120 instructions. Keep certified-mail proof — the date the IRS receives it is what counts.
5. Calendar everything. Same package, same address, same date next year. The form is annual, and missing the second year doesn’t become easier than missing the first.

How Cherry handles Form 5472

Cherry is the autonomous fiscal agent for Delaware LLCs and C-Corps with foreign owners. Form 5472 is in the wedge case — the highest-urgency filing for our ICP, on a calendar that runs the same way for every entity in the cohort. Cherry tracks the EIN application, watches the calendar, drafts the pro-forma 1120, pulls reportable transactions from connected bank and operating-company feeds, packages the filing, and submits before the deadline. If something blocks the filing — an EIN delayed, a related party undeclared — Cherry surfaces it weeks before April 15, not after.

The $25,000 penalty is a tax on inattention. The form itself is mechanical. The hard part is knowing the calendar, knowing what counts as a reportable transaction, and having the EIN before March. Cherry handles all three by default — so the next time the deadline comes around, you don’t do anything. Cherry does.