FDAP Income for Foreign LLC Owners: What Counts (2026)

The four words in the acronym are each doing work, and reading them literally explains most of the category. Income is fixed when it is paid in an amount known in advance. It is determinable when there is a formula or basis to compute it, even if the figure is not fixed. It is annual or periodical when it recurs — although the regulations are explicit that a payment can be FDAP even if made only once, so the periodicity requirement is far weaker than it sounds.

Behind the definition sits a practical problem the US had to solve. A foreign person receiving money from American sources may have no US return-filing obligation, no US address, and no US assets to collect against. Rather than assess and chase, Congress pushed the duty onto the payer: the US party withholds 30% before the money leaves, and remits it to the IRS. Collection happens before enforcement is ever needed — which is also why the rate applies to the gross.

Why 30% of gross hurts more than it looks

The absence of deductions is the whole story. A foreign owner receiving $100,000 of US rent with $80,000 of expenses has $20,000 of economic profit — and a $30,000 FDAP tax bill, exceeding the profit itself. This is precisely why the Code offers real property owners the §871(d) election to treat rental income as effectively connected instead, moving to the net-basis regime described below.

The last row is the one worth pausing on. A nonresident individual’s capital gains are generally outside the US net entirely — not FDAP, not ECI, not taxed. The two large exceptions are gains on US real property interests, which FIRPTA drags into the ECI regime under IRC §897, and the rarely-met rule taxing a nonresident present in the US for 183 days or more in the year.

Sourcing decides everything first

Before the FDAP question is even asked, the income has to be US-source. Interest is sourced to the payer’s residence. Dividends are sourced to the paying corporation’s place of incorporation. Rent and royalties are sourced to where the property is used. Services are sourced to where the work is physically performed — which is why a foreign founder working from Istanbul or São Paulo for US clients generally produces foreign-source services income that the US does not tax at all.

These are the two mutually exclusive halves of how the United States taxes foreign persons, and which one applies turns on whether there is a US trade or business that the income is effectively connected to.

For the typical foreign-owned LLC — a consultancy, an agency, a SaaS product, an e-commerce store — the revenue is business income, and the live question is whether the LLC has a US trade or business at all. Where it does not, there is generally no US income tax and no FDAP withholding either. Where it does, the income is ECI and taxed on the net. That analysis is worked through in full on the effectively connected income page.

The one deliberate crossover is the §871(d) election. A foreign owner of US rental property may elect to treat the rents as effectively connected, giving up the withholding regime in exchange for deducting mortgage interest, property tax, repairs, and depreciation. On a leveraged property this routinely turns a 30% gross tax into little or no tax at all.

The United States has income tax treaties with roughly 65 countries, and each one sets its own article-by-article rates. A handful of illustrative positions:

Two structural points matter more than any individual rate. First, a treaty reduces tax — it never reduces a reporting obligation, which is why treaty residents still file Form 5472 in full. Second, a disregarded entity cannot claim treaty benefits in its own name: the LLC is fiscally transparent, so the owner claims the treaty personally, on their own W-8BEN, naming themselves as the beneficial owner. Getting that wrong is one of the more common causes of full 30% withholding despite an eligible owner. The country-by-country picture is set out in the tax treaty benefits guide, and the certification form itself in W-8BEN vs W-8BEN-E.

This is where the two topics meet for most readers. Form 5472 exists to show the IRS what moved between a 25%-foreign-owned US entity and its foreign related parties, and FDAP-type flows are exactly the kind of movement it is designed to surface — because they are also the classic mechanism for stripping profit out of a US entity.

• Royalties and licence fees paid by the LLC to its foreign owner for IP — a Part IV amount, and a transfer pricing question if the rate is not arm’s length.
• Rent paid by the LLC to the owner for premises or equipment.
• Interest paid by the LLC on a loan from the owner, which also has to satisfy arm’s-length terms.
• Amounts paid for services rendered by the owner to the LLC.

Note what is not a Part IV monetary transaction: a plain capital contribution or distribution. Those are still reportable, but they belong in Part VI as non-monetary or other transactions. Capital contributions and reportable transactions generally are covered separately, and the line-by-line mechanics are in the Form 5472 instructions.

The essential point is that the reporting duty is unconditional. Whether the FDAP payment attracted 30%, 15%, or nothing at all under a treaty, it goes on the form. Form 5472 is an information return, and no treaty in force relieves anyone of it — while the penalty for omitting it is $25,000 per form, per year.

The three forms operate as a sequence. You give the payer a W-8BEN establishing foreign status and any treaty rate; the payer withholds accordingly and remits; the payer then files Form 1042-S reporting the gross payment and the tax withheld, with a copy to you. Over-withholding is common when a W-8BEN was late, expired, or wrongly completed — and the remedy is to file a US return claiming the excess as a credit, not to ask the payer for the money back after year-end.

What Form 1042-S never does is discharge your LLC’s own reporting. It is filed by the payer, about a payment to you; Form 5472 is filed by your entity, about transactions with you. The distinction is worked through in Form 1042-S: what it means when you receive one.

Foreign owners often arrive at FDAP through a specific worry: a platform withheld 30%, or a client asked for a W-8BEN, or an accountant mentioned withholding. Those are worth resolving — a correctly filed W-8BEN can be worth thousands. But they sit alongside, not instead of, the filing that applies every year without exception.

form5472.tax prepares, reviews, and files Form 5472 with the pro forma Form 1120 for a flat $299 — against $547 at form5472.online and $1,999/year at doola. See the pricing page, or start on the apply page.