Updated June 2026 · Reviewed by a Form 5472 specialist

The short answer
Key takeaways
A related party is any direct or indirect 25% foreign shareholder of the reporting entity, and any person related to the entity or to that shareholder under IRC §267(b), §707(b)(1), or the transfer-pricing rules of §482. It can be an individual, corporation, partnership, trust, or estate.
Form 5472 exists to report dealings between a US business and the foreign people or companies connected to it. The legal hinge is the phrase “related party.” The Treasury regulations under section 6038A — specifically Treas. Reg. §1.6038A-1(d) — define a related party as any of three things: a 25% foreign shareholder of the reporting corporation; a person related to that reporting corporation under section 267(b) or 707(b)(1); or any other person related to the reporting corporation within the meaning of section 482.
| Category | Statute | Typical example for a small LLC |
|---|---|---|
| 25% foreign shareholder | §6038A(c)(2) | The non-resident who owns the LLC |
| Person related under §267(b) / §707(b)(1) | §267(b), §707(b)(1) | A foreign company you also own; a close family member |
| Person related under §482 | §482 | Any entity under common control used to shift income |
Source: Treas. Reg. §1.6038A-1(d); IRC §§267(b), 707(b)(1), 482. Verified June 2026.
A related party does not have to be a person in the everyday sense. It can be an individual, a foreign corporation, a foreign or domestic partnership, a trust, or an estate. The common thread is a relationship of ownership or control close enough that the IRS wants the transactions between the parties disclosed. If you are unsure whether your entity even has to file at all, start with the do-I-need-to-file qualifier.
A 25% foreign shareholder is a foreign person who owns at least 25% of the US entity by vote or by value, directly or indirectly. This foreign owner is the central related party on Form 5472, and a single foreign owner of an LLC owns 100% — far above the threshold.
The 25% test is the gateway to the whole regime. Under IRC §6038A(c)(1), a corporation is a “reporting corporation” if at least 25% of it is owned by one foreign person at any time during the tax year. A 25% foreign shareholder is that owner. Ownership is measured by the greater of vote or value, so you cannot escape the threshold by holding non-voting interests.
For the typical reader of this page — a non-resident who formed a US single-member LLC — the analysis is trivial: you own 100%, which is well over 25%, so you are the 25% foreign shareholder and the central related party. The LLC is treated as a corporation for this reporting purpose under T.D. 9796, effective for tax years beginning on or after January 1, 2017.
| Ownership situation | 25% foreign shareholder? | Reporting entity? |
|---|---|---|
| Non-resident owns 100% of a US LLC | Yes (100% ≥ 25%) | Yes |
| Two non-residents own 50/50 | Yes — each is over 25% | Yes |
| Foreign person owns 30% of a US C-corp | Yes | Yes |
| Foreign person owns 10%, no attribution | No (below 25%) | Generally no |
| US person owns 100%, no foreign owner | No foreign owner | No |
Source: IRC §6038A(c)(1)–(2). Verified June 2026.
The takeaway is simple: a foreign-owned single-member LLC always has at least one 25% foreign shareholder — the owner. That is why these LLCs are virtually always in scope for Form 5472.
Yes, if both are related parties. If your US LLC pays a foreign company you also own, that company is a related party under the common-control rules of §267(b) and §482, so the payment is a reportable transaction reported on its own Form 5472.
Many founders run more than one entity — a US LLC for invoicing US customers and a home-country company that actually does the work, for example. When the US LLC pays that foreign company, people assume it is just a normal vendor payment. It is not, because you control both sides. Under section 267(b) and the common-control concept in section 482, two entities owned or controlled by the same person are related.
The whole reason section 6038A exists is to stop profit from being quietly shifted out of the US through payments between commonly controlled companies. So related-party reporting is at its strictest exactly here. If your US LLC pays your foreign company for “services,” “management fees,” or “licensing,” each category is a reportable transaction on Form 5472, and the foreign company is a separate related party requiring its own form.
| Other party | Related to you? | Separate Form 5472? |
|---|---|---|
| A foreign company you wholly own | Yes — common control | Yes |
| A foreign company you own 50%+ | Yes | Yes |
| A US company you also own | Yes (US related party) | Yes if reportable transactions |
| A company a close family member owns | Often — via §318 attribution | Yes if attributed |
| A genuinely unrelated supplier | No | No |
Source: IRC §267(b), §318, §482; Treas. Reg. §1.6038A-1(d). Verified June 2026.
The practical rule: any time money flows between your US LLC and another business you own or control — anywhere in the world — assume it is a related-party transaction and must be reported.
Form 5472 applies the constructive ownership rules of IRC §318, as modified by §6038A. Ownership held by family members and related entities is attributed to you, so people and companies you do not directly own can still be related parties.
You cannot escape related-party status simply by not holding legal title yourself. Section 6038A pulls in the constructive ownership rules of section 318, with modifications. Under attribution, stock or interests owned by certain family members, by entities you control, and by entities that control you are treated as owned by you for the 25% test and for determining who is a related party.
Family attribution treats interests owned by a spouse, children, grandchildren, and parents as yours. Entity attribution flows ownership up and down through corporations, partnerships, trusts, and estates. The effect is that a company technically owned by your father, or by a holding entity you partly control, can be attributed to you and become a related party whose transactions must be reported.
| Who actually owns it | Attributed to you? | Effect |
|---|---|---|
| Your spouse owns the foreign company | Yes — family attribution | Foreign company is a related party |
| Your child owns 100% of an entity | Yes | That entity can be a related party |
| A holding company you control owns it | Yes — entity attribution | Underlying entity attributed to you |
| A friend (unrelated) owns it | No | Not a related party |
Source: IRC §318 as modified by §6038A; Treas. Reg. §1.6038A-1(d). Verified June 2026.
Because attribution is technical and easy to overlook, mapping the full set of related parties is one of the things a specialist does as part of the flat $299 filing — missing one is what makes a return incomplete.
Report every monetary and non-monetary transaction between the reporting entity and each related party: capital contributions, loans, repayments, distributions, sales, purchases, rent, royalties, interest, commissions, and amounts paid or received for services. Each is entered by category and dollar amount.
Once a related party is identified, the form requires you to disclose the transactions with that party, grouped into categories. Monetary transactions for services, rent, royalties, interest, and commissions go in Part IV. The catch-all reportable transactions of a foreign-owned US disregarded entity go in Part V. Non-monetary and less-common items — loans, capital contributions, and distributions — go in Part VI.
| Transaction | Part of Form 5472 | Direction |
|---|---|---|
| Capital contribution from the owner | Part V / VI | Into the LLC |
| Loan from the owner to the LLC | Part VI | Into the LLC |
| Loan repayment to the owner | Part VI | Out of the LLC |
| Distribution to the owner | Part VI | Out of the LLC |
| Payment for services to a related company | Part IV | Out of the LLC |
| Rent or royalties to a related party | Part IV | Out of the LLC |
Source: IRS Instructions for Form 5472, Parts IV–VI. Verified June 2026.
The reporting is by category and amount, not transaction-by-transaction narrative. You total the year’s contributions, the year’s distributions, and so on. A line-by-line walkthrough of each part is on the Form 5472 instructions page.
Yes. You file a separate Form 5472 for every related party you had reportable transactions with during the year, all attached to the one pro forma Form 1120. Three related parties means three Forms 5472 — and a separate $25,000 penalty for each one not filed.
Form 5472 is filed per related party, not per entity. A single LLC that transacted with three different related parties files three separate Forms 5472 for the year. They are all attached to the same single pro forma Form 1120 — you do not file three 1120s — but each related party gets its own 5472 with its own Part III identifying that party and its own Part IV/VI transaction amounts.
| Related parties with transactions | Forms 5472 due | Penalty if all unfiled |
|---|---|---|
| 1 (just the owner) | 1 | $25,000 |
| 2 | 2 | $50,000 |
| 3 | 3 | $75,000 |
| 4 | 4 | $100,000 |
Source: IRS Instructions for Form 5472 (one form per related party); IRC §6038A(d). Verified June 2026.
This is why counting related parties matters before you estimate exposure. A founder who thinks of a single $25,000 risk may actually face a multiple of it. The penalty calculator assumes one form per year — multiply by your number of related parties.
Common examples: an owner wiring $5,000 to start the LLC (capital contribution), the LLC paying a founder-owned foreign company $30,000 for services, the owner lending the LLC $10,000, and the LLC distributing $8,000 of profit back to the owner. Each is reported by category and amount.
Concrete numbers make the rules click. Consider a non-resident, Maria, who owns a US single-member LLC and also owns a consulting company back home. Over the year, several transactions occur between Maria, her foreign company, and the US LLC — and every one of them is a related-party transaction.
| Event | Related party | Reported in | Amount |
|---|---|---|---|
| Maria funds the LLC bank account | Maria (owner) | Part V / VI | $5,000 |
| LLC pays Maria's foreign company for work | Foreign company (common control) | Part IV | $30,000 |
| Maria lends the LLC working capital | Maria (owner) | Part VI | $10,000 |
| LLC repays part of the loan | Maria (owner) | Part VI | $4,000 |
| LLC distributes profit to Maria | Maria (owner) | Part VI | $8,000 |
Source: illustrative; categories per IRS Instructions for Form 5472. Verified June 2026.
Maria has two related parties — herself and her foreign company — so she files two Forms 5472, both attached to one pro forma Form 1120. See a fully filled illustration on the Form 5472 example page.
The penalty is $25,000 per Form 5472 not filed or filed substantially incomplete, under IRC §6038A(d). Omitting a related party or its transactions can make the form incomplete, which the IRS treats the same as not filing it — triggering the full penalty.
Getting related parties wrong is not a small error. The section 6038A penalty applies not only when you fail to file, but also when you file a form that is substantially incomplete. Leaving out a related party you transacted with, or omitting that party’s transaction amounts, can render the filing incomplete — and an incomplete Form 5472 is penalized the same $25,000 as one never filed.
The penalty has no cap and no statute of limitations, and after a 90-day IRS notice an additional $25,000 accrues every 30 days the failure continues. Because the penalty is per form, missing one related party among several can mean an extra $25,000 on top of the rest. Full mechanics are on the Form 5472 penalty page; we do not represent clients in penalty-abatement proceedings, so the reliable path is to identify every related party and file completely the first time.
| Error | Treated as | Penalty |
|---|---|---|
| Form not filed at all | Failure to file | $25,000 per form |
| Related party omitted | Substantially incomplete | $25,000 per form |
| Transaction amounts left blank | Substantially incomplete | $25,000 per form |
| Correct, complete, on-time filing | Compliant | $0 |
Source: IRC §6038A(d); Treas. Reg. §1.6038A-4. Verified June 2026.
Keep records sufficient to establish the amount and nature of every related-party transaction: bank statements, the operating agreement, loan agreements, invoices, and a ledger of money moving between you and the entity. Section 6038A imposes a separate $25,000 penalty for failing to keep them.
Reporting related-party transactions is only half of section 6038A; the other half is record-keeping. The reporting entity must maintain permanent books and records that substantiate the amount and nature of each related-party transaction. For a small LLC, that means keeping bank statements showing the owner’s deposits and distributions, any loan agreements, invoices for inter-company services, and a simple ledger.
If the IRS examines the entity and the records are missing, a separate $25,000 penalty applies under section 6038A(d) for failure to maintain records — independent of any penalty for the form itself. Clean records also let the US entity respond if the IRS requests documentation of a related-party transaction, which it can do under the agency rules of section 6038A. Good documentation turns a stressful inquiry into a routine request.
Map the relationships first: list yourself, every business you own or control, and any entity attributable to you through family or holding structures. Then match each to its transactions. A specialist does this mapping as part of the flat $299 filing so no related party is missed.
Because the penalty is per form and an omission makes the return incomplete, the safest approach is to build the related-party map before you fill anything in. Start with yourself as the owner. Add every other company you own or control, anywhere in the world. Then apply attribution: include entities owned by close family or by holding structures that flow up or down to you. Finally, match each related party to the transactions you had with it during the year.
This is exactly the work a Form 5472 specialist does. As part of the flat $299 filing, form5472.tax identifies your related parties, assigns each transaction to the correct part of the form, prepares a separate Form 5472 for each related party, attaches them to one pro forma Form 1120, and files the package the only two ways the IRS accepts for a disregarded entity. When you are ready, you can start on the apply page or read how to file Form 5472 step by step.
We map your related parties and file a separate Form 5472 for each, with the pro forma 1120, for a flat $299. Not sure who counts? Message us first.