Form 5472 and Disregarded Entities: The Complete Explanation
Updated June 2026 · Reviewed by a Form 5472 specialist
Updated June 2026 · Reviewed by a Form 5472 specialist
The short answer
Key takeaways
A disregarded entity is a business the IRS ignores as separate from its owner for income-tax purposes — in over 90% of cases a single-member LLC. The LLC exists in state law, but federally there is one taxpayer, not two.
“Disregarded” is a tax label, not a business status. The LLC is real: it has a registered agent, a bank account, and liability protection under state law. But when the IRS calculates income tax, it looks straight throughthe LLC to its single owner. A US-citizen owner simply reports the LLC’s profit on their personal return; the LLC files no separate income-tax return of its own. For the full definition and examples, see what is a disregarded entity.
By default, every domestic single-member LLC is disregarded unless it elects to be taxed as a corporation. That default is what creates the Form 5472 problem when the single member is a foreign person.
| Structure | Separate income-tax return? | Default for a single-member LLC? |
|---|---|---|
| Disregarded entity (default SMLLC) | No — owner reports activity | Yes |
| LLC electing C-corporation (Form 8832) | Yes — Form 1120 | No |
| Multi-member LLC (partnership) | Yes — Form 1065 + K-1 | No |
Source: Treas. Reg. §301.7701-3 (check-the-box rules). Verified June 2026.
Because of a 2017 rule. Final regulations under T.D. 9796 treat a foreign-owned US disregarded entity as a corporation for Form 5472 reporting only, closing a gap that let foreign owners move money invisibly through US LLCs.
For decades, a disregarded entity filed nothing of its own, which meant a non-US person could run money through a US LLC with no IRS visibility. Effective for tax years beginning on or after January 1, 2017, the Treasury fixed that. Under IRC §6038A and the regulations in T.D. 9796, a foreign-owned US disregarded entity is now treated as a domestic corporation — but only for the recordkeeping and reporting rules of section 6038A.
That single carve-out is the entire bridge between “disregarded” and “must file Form 5472.” The LLC stays disregarded for income tax, yet it must file the form as if it were a corporation. The background on this status is on the foreign-owned disregarded entity page.
Any US disregarded entity that is 25%+ owned by a non-US person and had at least one reportable transaction must file. Because forming and funding an LLC moves money, virtually every foreign-owned single-member LLC qualifies in year one.
Two conditions must both be true: a foreign person owns at least 25% of the entity, and there was a reportable transaction with that owner or a related foreign party. A reportable transaction is broad — it includes a capital contribution used to open the bank account, reimbursing the owner for the formation fee, sales, services, loans, and distributions. That is why a brand-new, zero-revenue LLC almost always still files.
| Situation | Files Form 5472? |
|---|---|
| Foreign owner funded the LLC's bank account | Yes — funding is a reportable transaction |
| Foreign owner paid the formation fee personally | Yes — that is a reportable transaction |
| LLC had no activity and no money moved at all | Rare — but document it carefully |
| LLC is owned 100% by a US citizen | No — no foreign owner |
Source: IRC §6038A; IRS Instructions for Form 5472. Verified June 2026.
Because nearly every funding event triggers it, treat filing as the default. The cost of being wrong is far higher than the cost of filing — see the pricing page to compare.
A pro forma Form 1120 is a mostly blankcorporate return used only as a cover sheet for Form 5472. The disregarded entity completes only the top identifying lines and writes “Foreign-owned U.S. DE pursuant to Regulations section 1.6038A-1” across the top.
A disregarded entity has no corporate income tax to compute, so the pro forma 1120 is not a real tax return — it is a carrier document. You fill in the name, address, EIN, and date, mark the required notation, and attach Form 5472. No income, deductions, or tax appear on it. The IRS reads the attached Form 5472 for the substance.
This is a frequent point of confusion: people assume “1120” means a full corporate return with tax owed. For a disregarded entity it does not. The full walkthrough is in pro forma 1120, and a beginner version lives in pro forma 1120 explained.
It cannot e-file. The pro forma 1120 with Form 5472 attached must be mailed to P.O. Box 149342, Austin, TX 78714-9342, or faxed to 855-887-7737 — the only 2 accepted methods. Keep the receipt or fax confirmation as proof.
There is no electronic filing path for a foreign-owned disregarded entity. The IRS accepts the package only by mail or fax, and it must be sent by the deadline. Always keep a certified-mail receipt or a fax transmission confirmation — that proof is your evidence the form was filed on time if the IRS ever questions it.
| Method | Where | Proof to keep |
|---|---|---|
| P.O. Box 149342, Austin, TX 78714-9342 | Certified-mail receipt | |
| Fax | 855-887-7737 | Fax transmission confirmation |
Source: IRS Instructions for Form 5472 (foreign-owned U.S. DE). Verified June 2026.
One more identity detail matters: the form needs a reference ID number for the entity. How to create one is covered in the reference ID number guide.
For the 2025 tax year it is due April 15, 2026, filed with the pro forma 1120. Filing Form 7004 by April 15 extends the deadline to October 15, 2026 — but a disregarded entity owes no entity-level tax to pay.
The deadline is the 15th day of the 4th month after the tax year ends — April 15 for a calendar-year LLC. The Form 7004 extension pushes the filing deadline six months to October 15, but because a disregarded entity has no corporate tax, there is no payment that comes due earlier. Miss the deadline without an extension and the $25,000 penalty can apply even though no tax was owed.
The penalty is $25,000 per form, per year, with no cap and no statute of limitations under IRC §6038A(d) and §6501(c)(8). After a 90-day IRS notice, an extra $25,000 accrues every 30 days the failure continues.
This is one of the harshest information-return penalties in the tax code, and it falls on the disregarded entity precisely because of the corporation-for-reporting rule. With no statute of limitations on an unfiled information return, a year missed long ago can still be assessed today. The penalty applies even when the LLC made no money, because it is triggered by the failure to file — not by profit.
The practical lesson: filing a simple, mostly blank package on time is dramatically cheaper than risking the penalty. Compare doing it yourself against a flat fee on the pricing page.
The IRS charges nothing, but a single mistake costs $25,000. Specialist services range from $299 (form5472.tax) to $547 (form5472.online) to $1,999/year (doola) — all delivering the same Form 5472 plus pro forma 1120.
DIY filing is free but unforgiving: the $25,000 penalty applies even to an honest mistake or a missed deadline, and a disregarded entity’s package has several easy-to-miss requirements (the notation, the reference ID, the mail-or-fax-only rule). For a flat $299, a specialist prepares Form 5472 and the pro forma 1120, reviews it, and files it correctly.
That is $248 less than form5472.online and a fraction of doola’s $1,999/year. Start on the apply page when you are ready.
Form 5472 and pro forma 1120, prepared, reviewed, and filed for a flat $299. Or message us first — we answer every question.