Form 1042-S: What It Means When You Receive One
Updated June 2026 · Reviewed by a Form 5472 specialist
Updated June 2026 · Reviewed by a Form 5472 specialist
The short answer
Key takeaways
Form 1042-S, “Foreign Person’s U.S. Source Income Subject to Withholding,” reports US-source income paid to a foreign person and the tax withheld. The default rate is 30%, and the withholding agent must issue it by March 15.
Form 1042-S exists so the IRS can track money leaving the US that is paid to non-US recipients. Whenever a US payer — called a withholding agent — sends US-source income to a foreign person, that agent generally must withhold a flat 30% tax under IRC §1441 and report the payment on Form 1042-S. The agent files a summary Form 1042 with the IRS and sends each recipient a copy of their 1042-S.
Typical income on a 1042-S is FDAP income: fixed or determinable annual or periodical income such as interest, dividends, royalties, rents, and certain service payments. It is the foreign-recipient counterpart to the W-2 and 1099 that US persons receive. If you operate through a US LLC, understanding how this income interacts with your filings matters — see our overview of US LLC annual compliance for foreign owners.
A US withholding agent sends it: a bank, broker, marketplace, licensor, or business client that paid you US-source income. They must issue Form 1042-S to each foreign recipient and to the IRS by March 15 of the following year.
Any US person or entity that controls a payment of US-source income to a foreign person is a withholding agent and is personally liable for getting the withholding right. That is why payers ask you for a Form W-8BEN before they pay you — it tells them your foreign status and whether a treaty lowers the rate.
| Payer | Income reported | Typical rate before treaty |
|---|---|---|
| US bank or broker | Interest, dividends | 30% |
| Software / content marketplace | Royalties, licensing | 30% |
| US business client | Service fees (US-source) | 30% |
| US partnership | ECI allocations (Form 8805 may apply) | Up to 37% |
Source: IRS Instructions for Form 1042-S; IRC §1441. Verified June 2026.
If your income is effectively connected to a US trade or business rather than passive FDAP, different rules apply — read our guide to effectively connected income for foreign LLC owners.
Box 1 carries an income code and Box 3 or 4 carries a withholding type and exemption code. There are more than 30 income codes; code 06 is dividends, 12 is royalties, and exemption code 04 means a treaty reduced the tax.
The codes are the heart of the form. Box 1 identifies the kind of income, and the withholding boxes explain why the rate is what it is. A rate of 0% with exemption code 04 means a tax treaty applied; a rate of 30% with no exemption code usually means the payer never received a valid W-8BEN from you.
| Box | Code | Meaning |
|---|---|---|
| Box 1 | 06 | Dividends paid by US corporations |
| Box 1 | 12 | Royalties paid for the use of intangibles |
| Box 1 | 16 | Compensation for independent personal services |
| Box 3a / 4a | 04 | Exempt under an income tax treaty |
| Box 3b / 4b | 30% | Statutory rate when no treaty or W-8BEN applies |
Source: IRS Instructions for Form 1042-S (2025). Verified June 2026.
Reading these codes correctly tells you whether you were over-withheld. Choosing the right W-8 form is the first step — compare them in Form W-8BEN vs W-8BEN-E.
You give Form W-8BEN to the payer before being paid, certifying foreign status and claiming any treaty rate. The payer relies on it to withhold correctly and to issue your Form 1042-S. Without it, the payer must withhold the full 30%.
Form W-8BEN is the input; Form 1042-S is the output. If you submit a complete, valid W-8BEN naming your country of residence and the treaty article, the payer can apply a reduced rate — sometimes 0% — and that reduced rate then appears on your 1042-S. A missing, expired, or incorrect W-8BEN forces 30%withholding, which you can only recover later by filing a US return.
Most over-withholding traces back to a flawed W-8BEN. A walkthrough of every line is in how to fill out Form W-8BEN, and the form’s full purpose is covered on our Form W-8BEN page. A W-8BEN is generally valid for the year signed plus the next three calendar years, so plan to refresh it.
No. Form 1042-S reports US-source income paid to a foreign person and the tax withheld; Form 5472 reports related-party transactions of a 25%-foreign-owned US company. They are filed separately, and Form 5472 carries a $25,000 penalty.
Foreign owners frequently confuse the two because both involve the IRS and foreign persons. But they answer different questions. Form 1042-S answers “how much US-source income did this foreign person receive and how much was withheld?” Form 5472 answers “what transactions happened between this US company and its foreign owner?”
| Feature | Form 1042-S | Form 5472 |
|---|---|---|
| Reports | US-source income paid to a foreign person | Related-party transactions |
| Who files it | The US withholding agent / payer | The 25%-foreign-owned US LLC or corp |
| Deadline | March 15 | April 15 (Oct 15 with Form 7004) |
| Penalty | Up to 10% of unpaid tax | $25,000 per form, per year, no cap |
Source: IRS Instructions for Forms 1042-S and 5472; IRC §6038A(d). Verified June 2026.
Since final regulations under T.D. 9796 (effective for tax years beginning on or after January 1, 2017), a foreign-owned single-member LLC is treated as a corporation for Form 5472 purposes — so a 1042-S you receive never substitutes for the 5472 your LLC must file.
Yes, if you were over-withheld. If the payer withheld 30% but a treaty allowed 10% or 0%, you file Form 1040-NR by April 15 to claim the refund, attaching the 1042-S as proof of tax already paid.
Over-withholding is common when a W-8BEN was missing or late. The 1042-S documents the tax already sent to the IRS in your name, so it functions like a withholding receipt. To recover the difference, a non-resident files Form 1040-NR for the year, reports the income, applies the correct treaty rate, and claims the excess as a refund. The 1040-NR for the 2025 year is due April 15, 2026.
Whether you owe anything at all depends on whether the income is passive FDAP or effectively connected income taxed on a net basis — a distinction explained in our effectively connected income guide.
Almost always yes. Virtually every foreign-owned single-member LLC has a reportable transaction — funding the LLC counts — so almost all must file Form 5472 with a pro forma Form 1120 by April 15. A 1042-S does not change that.
A 1042-S and a 5472 are independent obligations. Even if every dollar you received was correctly withheld and reported on a 1042-S, your US LLC still owes its own Form 5472 filing for the related-party transactions it had with you. Because forming and funding the LLC moves money from owner to entity, almost every foreign-owned SMLLC has at least one reportable transaction in its first year.
A foreign-owned disregarded entity cannot e-file. The pro forma Form 1120 with Form 5472 attached must be mailed to P.O. Box 149342, Austin, TX 78714-9342, or faxed to 855-887-7737 — those are the only two accepted methods. Miss it and 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); an extra $25,000 accrues every 30 days after a 90-day IRS notice.
One thing that is noton your list: under FinCEN’s March 2025 interim final rule, US-formed entities — including foreign-owned US LLCs — are exempt from beneficial ownership (BOI) reporting; only foreign reporting companies file. Form 5472 is separate and still required. You can hand the whole filing to us on the apply page for a flat $299, far below the $547 charged elsewhere — see the pricing page.
Your LLC's Form 5472 and pro forma 1120, prepared, reviewed, and filed for a flat $299. Or message us first — we answer every question.