If you’re a non-U.S. resident who formed a Delaware or Wyoming LLC to run your online business, you’ve probably heard some version of this: “A single-member LLC owned by a foreign person is a pass-through entity, so there’s nothing to file.” That advice is incomplete, and acting on it is one of the fastest ways to turn a $0 tax bill into a $25,000 penalty notice.

Here’s the part that gets left out of the LLC formation pitch: owing no U.S. income tax and having no U.S. filing obligation are two completely different things. The IRS doesn’t care whether your LLC made a profit. It cares whether you told it the LLC exists, who owns it, and what moved through it during the year. Miss that, and the penalty clock starts running whether or not you owe a single dollar of tax.

Why the IRS Treats Foreign-Owned LLCs Differently

A U.S. LLC with a single foreign owner is, by default, a “disregarded entity” for tax purposes — meaning it has no separate tax return of its own. Normally, a disregarded entity owned by a U.S. person doesn’t even need to file anything at the entity level. But in 2017, the IRS closed a loophole that foreign owners had been using for decades to keep their U.S. activity invisible. Today, a domestic LLC that is at least 25% foreign-owned (or any percentage, for a single foreign owner) is treated as a “reporting corporation” for one specific purpose: informational disclosure.

That means even an LLC with zero revenue, zero profit, and zero U.S. tax due can still owe the IRS a filing — and the penalty for skipping it has nothing to do with how much tax was owed.

The Filing Every Foreign-Owned LLC Needs: Form 5472 + Pro Forma 1120

The core compliance requirement is a combination of two forms, filed together:

• Form 5472 — discloses “reportable transactions” between the LLC and its foreign owner or related parties. This includes capital contributions, loans, distributions, and payments for services, even if they’re just you moving your own money into or out of your own company.
• Pro forma Form 1120 — a cover page attached to Form 5472 purely to give the IRS a form number to process it under. This is not a real income tax return for a disregarded entity; it exists solely to carry the 5472 filing.

The deadline is April 15 for calendar-year entities, with a six-month extension available via Form 7004. The two forms are typically mailed or filed together, and — critically — this filing cannot be e-filed by most owners without a preparer with the right software access, so it needs to be planned for, not left to the last week of tax season.

The Penalty Is Not Proportional to Tax Owed

A late or missing Form 5472 triggers an automatic $25,000 penalty — per form, per year — regardless of whether the LLC had any income at all. The IRS has increasingly automated the detection of missing 5472s, cross-referencing EIN applications against filed returns, which means “we didn’t know” is no longer a practical defense and reasonable-cause relief is harder to get than it used to be.

What About BOI/FinCEN Reporting?

This is where a lot of outdated advice is still circulating. Beneficial Ownership Information (BOI) reporting under the Corporate Transparency Act made headlines in 2024, and many founders assumed every LLC — foreign-owned or not — would need to file. The rule has since changed: under the current FinCEN framework, domestic reporting companies — meaning any entity formed in the U.S., even one 100% foreign-owned — are exempt from BOI reporting. Only foreign entities registered to do business in the U.S. (not formed here) still carry a BOI obligation.

In practice, this means a Delaware or Wyoming LLC you formed yourself is off the hook for BOI — but it does not touch your Form 5472 obligation, which is a separate requirement under a different statute entirely. Don’t let “BOI is basically dead” advice convince you that all federal disclosure requirements went away with it.

The Rest of the Annual Checklist

Form 5472 is the headline item, but it’s not the only recurring obligation. A foreign-owned LLC formed in the U.S. typically also needs to stay current on:

• Registered agent — every state requires an LLC to maintain one; letting this lapse can put the entity out of good standing without you even knowing.
• Annual report / franchise tax — Delaware’s flat annual franchise tax and Wyoming’s annual report fee are small but easy to miss from overseas, and lapses compound into reinstatement fees.
• EIN and bank account maintenance — keeping your EIN responsible-party information current, and keeping the entity’s U.S. bank or payment processor (Stripe, Mercury, PayPal) account in good standing, since processors increasingly ask for updated tax documentation.
• W-8BEN / W-8BEN-E on file — if the LLC pays you or receives payments that trigger withholding questions, the wrong form here can mean losing 30% to withholding that a tax treaty would otherwise reduce or eliminate.
• ITIN for the owner, where personal U.S. filings (such as a 1040-NR) are also required — ITIN processing currently runs 9–11 weeks, longer in filing season, so this needs to be started well ahead of any deadline.

A Simple Way to Think About the Calendar

Most foreign founders do best treating U.S. compliance as a fixed annual rhythm rather than something to figure out each spring: confirm the registered agent and state report are current at the start of the year, get bookkeeping closed out by February so there’s clean data for the 5472, file (or extend) by April 15, and use any extension period to resolve anything unusual — a new capital contribution, a loan to or from the owner, a change in ownership percentage — before the extended deadline arrives.

None of this requires a large finance team. It requires knowing which four or five filings actually apply to your structure, and not treating “the LLC didn’t make money” as a reason to skip them.

Get This Handled Before It Becomes a Penalty Notice

If you own a U.S. LLC as a non-resident and you’re not sure whether your Form 5472, state filings, and withholding documentation are actually squared away, it’s worth a proper review now rather than after a notice arrives. MakeMyFinancials works specifically with foreign-owned U.S. entities on exactly this kind of compliance — reach out through makemyfinancials.com and we’ll walk through what your entity actually needs to file this year.